Climate and monthly weather forecastMystic, CT
Climate and monthly weather forecast
The climate of Mystic
Mystic, Connecticut, is characterized by a Marine West Coast climate, with warm summers, as described by the Köppen climate classification Cfb. Sitting at the mouth of the Mystic river, this charming maritime town experiences an array of weather conditions throughout the year. Given its geographical position, it's much influenced by the Atlantic Ocean, which tends to moderate summer heat and winter cold.Temperature fluctuations are a regularity in Mystic. High temperatures range from a chilly 36.5°F (2.5°C) in January to a pleasant 77.9°F (25.5°C) in July compared to low temperatures that vary from a cold 26.6°F (-3°C) in January up to a moderately warm 66.9°F (19.4°C) in July. Overall, temperatures stay mild to warm, benefiting from the climate type. Humidity also changes over the year, varying from 74% to 81%.
Rainfall in Mystic oscillates from month to month, with an average of 3.86" (98mm) being recorded in December, marking the peak of the city's annual precipitation. The driest period occurs in September, with an average rainfall of 1.73" (44mm). Snow is not a frequent phenomenon, highest snowfall of 2.44" (62mm) registered in March.
Unique points to highlight in Mystic's weather are its relatively constant visibility, set at an average of 6 miles throughout the year. Furthermore, the UV index, not reaching beyond 6 throughout the months, is significantly lower compared to many national averages.
The best time to visit Mystic
The perfect time to visit Mystic largely depends on the visitor's weather preferences. For beach, and water recreational activities, warmer summer temperatures from June to August, ranging between 70.9°F (21.6°C) and 77.9°F (25.5°C) in highs, prove ideal. Besides, the Atlantic Ocean is warmest during these months, with temperatures peaking at 70.3°F (21.3°C) in August, which is optimum for various marine activities.For those who prefer cooler temperatures, comfortable weather can be found from September to November. During these months, temperatures decline progressively from highs of 71.4°F (21.9°C) in September to 51.3°F (10.7°C) in November, creating superb conditions for exploring Mystic's historic town center or hiking the nearby trails.
The worst time to visit Mystic
Adverse weather conditions in Mystic are often experienced from January to March. In January and February temperatures drop to lows of 26.6°F (-3°C) and 27.3°F (-2.6°C) respectively, along with a significant increase of snowfall, peaking at 2.44" (62mm) in March. This period could make outside activities challenging and uncomfortable, especially for those unprepared for such cold conditions.Spring weather in Mystic
The onset of spring in Mystic comes with a notable rise in temperatures, reaching up to 52.5°F (11.4°C) in April from the lower temperatures of March. By the end of spring in May, high temperatures reach 62.6°F (17°C), creating perfect conditions for outdoor explorations. The rainfall during this season varies from 2.95" (75mm) in March up to 3.23" (82mm) in April, thus, carrying a mild rainfall gear could be beneficial.Summer weather in Mystic
Known for its warm summers, Mystic experiences average high temperatures between 70.9°F (21.6°C) and 77.9°F (25.5°C) from June to August. An increase in daylight to a peak of 15.1 hours in June allows ample time for sightseeing and marine activities. One important aspect to consider is the rise in humidity during summer, averaging 80% and peaking at 81% in June.Autumn weather in Mystic
Autumn brings a gradual decrease in temperature, with October highs averaging 61.7°F (16.5°C), falling to 51.3°F (10.7°C) by November. Though rainfall increases to a yearly maximum of 3.43" (87mm) in October, this period offers scenic beauty with a plethora of autumn colors, characteristic of New England's Fall.Winter weather in Mystic
Notably wintery, Mystic's December to February period is characterized by temperatures ranging within 42.3°F (5.7°C) to 36.5°F (2.5°C) in high and 33.4°F (0.8°C) to 26.6°F (-3°C) in low. An accumulation of snowfall that could reach 1.65" (42mm) in December and 1.89" (48mm) in February is another remarkable winter feature. Despite these rigid conditions, Mystic winter can offer a quiet and peaceful retreat, decorated with festive illuminations during the holiday period.Weather in January
In Mystic, January persists as the coldest month with an average high of only 36.5°F (2.5°C) and sun for just 5.2 hours per day. A crisp wind moving at a monthly average of 12.4mph (20km/h) whisks in the New Year, setting the tone for the frosty month ahead. Weather in January »Weather in February
Moving into February, Mystic's winter weather remains quite consistent with an increase in temperature to 38.1°F (3.4°C) being the only notable change. As the shortest month of the year, with daylight hours of just 10.6 hours, February makes for a cozy season. Weather in February »Weather in March
Greeting spring, March showcases a major shift, with temperatures rising to an average high of 43.3°F (6.3°C). The transition from the frigid cold to a somewhat warmer climate is greatly welcomed by the locals and tourists. Even though the temperatures start to climb, Mystic retains its rainfall level to about 2.95" (75mm) scattered across 12.6 days. Weather in March »Weather in April
April experiences a significant leap in temperatures to a welcoming 52.5°F (11.4°C), signaling the peak of the short-lived spring. With the snow completely melted away, locals and tourists can now enjoy full days outside. The landscape transitions from the drab winter tones to vibrant springtime hues, with flowering trees accentuating Mystic's quaint charm. Weather in April »Weather in May
With the passing of time, May sees Mystic fully immersed in the warmth of spring, setting the stage for the impending summer. Mystic throws off its winter coat as the temperature climbs to an average high of 62.6°F (17°C). The coastal town becomes a hive of outdoor activities, including outdoor dining, hiking, and waterfront sightseeing, among others. Weather in May »Weather in June
The onset of June indicates the arrival of summer to Mystic, with average high temperatures reaching 70.9°F (21.6°C). The longer daylight hours, offering a maximum of 15.1 hours, mark the summer solstice period. This transitional phase into summer imbues the city with a vibrant hustle and bustle as locals and tourists alike venture outdoors to make the most of the warm weather and clear skies. Weather in June »Weather in July
July, the heart of the summer season, brings Mystic's highest temperature, reaching up to 77.9°F (25.5°C). Thus, the city morphs into a bustling summer haven, teeming with tourists exploring the local attractions and stunning coastline. Weather in July »Weather in August
Even though August is typically characterized by slightly lower temperatures, the mercury levels remain high, ensuring the continuation of Mystic's summer spirits. The prevalence of long daylight hours, close to 13.8 hours, ensures visitors ample time to explore the natural and cultural richness of the city. Weather in August »Weather in September
September bids goodbye to summer with a notable decrease in temperature scale. The average high drops to 71.4°F (21.9°C), a perfect transition from the hot summer towards the cooler autumn. As autumn colors start to show, the city of Mystic transforms into an artist's palette with hues of gold, orange, and red. Weather in September »Weather in October
The warmth of October makes it a popular month for visitors to the historic seaport city. As the month progresses, the foliage changes color, providing a splendid display of fall hues. All this while, the average high temperature cools to a comfortable 61.7°F (16.5°C). Weather in October »Weather in November
November puts a marker on fall's end, with average high temperatures taking a dip to 51.3°F (10.7°C). As the crisp autumn air starts to turn chilly, Mystic gears up for the wintry season ahead. The vibrancy of autumn begins to fade, making way for the bare, winter-ready trees. Weather in November »Weather in December
The arrival of December witnesses Mystic embracing winter once again, with temperatures dropping to an average high of 42.3°F (5.7°C). The city prepares for the holiday season, with festive decor adding to its charm. Snow starts to reappear, dusting the cityscape with a light coat and bringing around 4.5 snowfall days. Weather in December »Updated: Aug 5, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Mystic records the coldest temperatures in January, averaging a high of 36.5°F (2.5°C) and a low of 26.6°F (-3°C).
The months with the lowest humidity are January, March, April and November, with an average relative humidity of 74%.
In Mystic, Connecticut, during the entire year, the rain falls for 166.1 days and collects up to 34.09" (866mm) of precipitation.
January through April, October through December are months with snowfall.
In Mystic, during the entire year, snow falls for 24.7 days and aggregates up to 7.87" (200mm) of snow.
January through March and December, with an average maximum UV index of 2, are months with the lowest UV index.
The month with the coldest seawater is February, with an average ocean temperature of 37.9°F (3.3°C).
February and December, with an average of 4.9h of sunshine, are months with the least sunshine.
The month with the most snowfall is March, when snow falls for 5.3 days and typically aggregates up to 2.44" (62mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Mystic, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
In Mystic, snow does not fall in May through September.
With an average relative humidity of 81%, June is the most humid month.
June has the longest days of the year, with an average of 15h and 6min of daylight.
June through August, with an average maximum UV index of 6, are months with the highest UV index.
Mystic's July weather, with an average high temperature of 77.9°F (25.5°C) and an average low temperature of 66.9°F (19.4°C), tends to be the warmest of the year.
The month with the warmest seawater is August, with an average ocean temperature of 70.3°F (21.3°C).
The month with the most sunshine is August, with an average of 10.6h of sunshine.
The month with the least rainfall is September, when the rain falls for 12.8 days and typically collects 1.73" (44mm) of precipitation.
The month with the most rainfall in Mystic is December, when the rain falls for 13.4 days and typically aggregates up to 3.86" (98mm) of precipitation.
The month with the shortest days is December, with an average of 9h and 12min of daylight.
Average temperature
Mystic, CT
The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (36.5°F).
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (26.6°F).
Average pressure
Mystic, CT
- Average pressure in January:
30.02"Hg - Average pressure in February:
30.01"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.04"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Mystic, CT
- Average wind speed in January:
12.4mph - Average wind speed in February:
12mph - Average wind speed in March:
12.1mph - Average wind speed in April:
11.1mph - Average wind speed in May:
9.6mph - Average wind speed in June:
8.6mph
- Average wind speed in July:
8.2mph - Average wind speed in August:
8.1mph - Average wind speed in September:
9.2mph - Average wind speed in October:
10.9mph - Average wind speed in November:
11.4mph - Average wind speed in December:
11.9mph
The windiest month (with the highest average wind speed) is January (12.4mph).
The calmest month (with the lowest average wind speed) is August (8.1mph).
Average humidity
Mystic, CT
The month with the highest relative humidity is June (81%).
The months with the lowest relative humidity are January, March, April and November (74%).
Average rainfall
Mystic, CT
- Average rainfall in January:
2.68" - Average rainfall in February:
2.64" - Average rainfall in March:
2.95" - Average rainfall in April:
3.23" - Average rainfall in May:
2.6" - Average rainfall in June:
2.83"
- Average rainfall in July:
2.72" - Average rainfall in August:
2.6" - Average rainfall in September:
1.73" - Average rainfall in October:
3.43" - Average rainfall in November:
2.83" - Average rainfall in December:
3.86"
The wettest month (with the highest rainfall) is December (3.86").
The driest month (with the least rainfall) is September (1.73").
Average rainfall days
Mystic, CT
- Average rainfall days in January:
10.8 days - Average rainfall days in February:
10.1 days - Average rainfall days in March:
12.6 days - Average rainfall days in April:
16 days - Average rainfall days in May:
16.6 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
17.1 days - Average rainfall days in August:
16 days - Average rainfall days in September:
12.8 days - Average rainfall days in October:
14.1 days - Average rainfall days in November:
10.8 days - Average rainfall days in December:
13.4 days
The month with the highest number of rainy days is July (17.1 days).
The month with the least rainy days is February (10.1 days).
Average snowfall
Mystic, CT
The month with the highest snowfall is March (2.44").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Mystic, CT
- Average snowfall days in January:
6.8 days - Average snowfall days in February:
6.3 days - Average snowfall days in March:
5.3 days - Average snowfall days in April:
0.7 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1 days - Average snowfall days in December:
4.5 days
The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature
Mystic, CT
The best month for swimming (with the highest average sea temperature) is August (70.3°F).
The coldest month (with the lowest average sea temperature) is February (37.9°F).
Average daylight / Average sunshine
Mystic, CT
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 12min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
5h and 12min - Average sunshine in February:
4h and 54min - Average sunshine in March:
6h and 12min - Average sunshine in April:
8h and 24min - Average sunshine in May:
8h and 36min - Average sunshine in June:
9h and 36min
- Average sunshine in July:
10h and 30min - Average sunshine in August:
10h and 36min - Average sunshine in September:
8h and 54min - Average sunshine in October:
6h and 12min - Average sunshine in November:
5h and 30min - Average sunshine in December:
4h and 54min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).
Average sunshine days
Mystic, CT
- Average sunshine days in January:
14.8 days - Average sunshine days in February:
12.8 days - Average sunshine days in March:
12.4 days - Average sunshine days in April:
12.4 days - Average sunshine days in May:
12.2 days - Average sunshine days in June:
11.7 days
- Average sunshine days in July:
11.7 days - Average sunshine days in August:
12.3 days - Average sunshine days in September:
15.2 days - Average sunshine days in October:
14.6 days - Average sunshine days in November:
16.5 days - Average sunshine days in December:
14.2 days
The month with the most sunshine days is November (16.5 days).
The months with the least sunshine days are June and July (11.7 days).
Average UV index
Mystic, CT
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March and December (UV index 2).
Average cloud cover
Mystic, CT
The months with the most cloud cover are February, March and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility
Mystic, CT
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
