Climate and monthly weather forecastWestport, CT
Climate and monthly weather forecast
The climate of Westport
Located in the state of Connecticut, USA, Westport enjoys a Humid subtropical climate classified under the Köppen climate system as Cfa. This signifies the absence of a dry season and a hot summer. Annually, the weather patterns fluctuate, providing distinctive seasons.Temperatures in Westport range annually from a chilly 26.4°F (-3.1°C) in the coldest month to a slightly balmy 81.1°F (27.3°C) in the warmest month. Furthermore, there is a notable shift in humidity levels throughout the year, largely staying consistent around 72% to 76%. This may lead to a rather humid atmosphere at times. In terms of rainfall, Westport experiences a steady downpour throughout the year with the heaviest precipitation at 4.13" (105mm), while the leanest month measures 2.36" (60mm) of rain. As for snowfall, it is not uncommon with an annual range of 0" (0mm) to 2.83" (72mm). The city enjoys an average daylight length of 9.3 hours to a maximum of 15.1 hours.
Westport's climate reveals unique characteristics. June, July, and August experience maximum temperatures above 80°F (26.7°C), the highest within the year. Moreover, December, January, and February, with their lowest temperatures, fall below freezing at 32°F (0°C). Furthermore, humidity remains fairly constant, leading to potential misty conditions, especially during winter months.
The best time to visit Westport
The ideal time to visit Westport largely depends on personal preference. However, considering temperatures, humidity, and rainfall, late spring and early summer months - May through July - are optimal. These months are characterized by moderate temperatures, ranging between 55.2°F (12.9°C) to 81.1°F (27.3°C), comparatively lower rainfall with only 3.11" (79mm) to 4.13" (105mm), and ample daylight of around 14 hours to 15.1 hours, facilitating outdoor activities.The worst time to visit Westport
The winter months, specifically January and February, may be the least desirable for visitors due to the cold weather conditions. During these months, Westport experiences an average low temperature from 26.4°F (-3.1°C) to 27.3°F (-2.6°C) and snowfall from 2.01" (51mm) to 2.83" (72mm), paired with reduced daylight, approximately just 9.6 hours to 10.7 hours.Spring weather in Westport
Spring in Westport runs from March through May, witnessing a noteworthy increase in temperatures. Starting at a low of 33.4°F (0.8°C) in March, there is a substantial leap to 52.7°F (11.5°C) by May. The region also faces a surge in rainfall during spring, from 2.8" (71mm) in March to 3.11" (79mm) in May, making it a slightly wet season.Summer weather in Westport
Summer months in Westport, from June to August, boast warm temperatures, ranging from 74.1°F (23.4°C) to 81.1°F (27.3°C). These are the hottest months in Westport. Rainfall also peaks during summers, going up to 4.13" (105mm) in July. Nonetheless, the ample daylight hours from 14.8 hours to 15.1 hours more than make up for it, offering extended daytime excursions.Autumn weather in Westport
Autumn in Westport, occurring between September and November, sees a gradual decrease in temperatures, from 73°F (22.8°C) in September down to 50.9°F (10.5°C) in November. The rainfall shifts from 2.72" (69mm) in September to 2.95" (75mm) in November. It is also worth noting that the length of the days shortens during these months, from 14 hours daylight in September to 9.9 hours in November.Winter weather in Westport
Winter sets in Westport from December till February. During this time, the region experiences its coldest weather conditions, with temperatures plummeting as low as 26.4°F (-3.1°C) in January. Snowfall occurs between 1.77" (45mm) in December, peaking at 2.83" (72mm) in February. Given the restricted daylight, only between 9.3 hours to 10.7 hours, outdoor activities may be limited.Weather in January
Commencing the year, January in Westport, Connecticut plummets into the depths of winter, featuring temperatures with average highs around 35.8°F (2.1°C) and lows of about 26.4°F (-3.1°C). A considerable amount of cloud coverage fosters a dull ambiance as the skies remain predominantly overcast. Weather in January »Weather in February
As Westport moves into February, there’s a mild leveling off in winter's intensity. Snowfall still prevails at a slightly increased rate with 2.83" (72mm) deposited over 7.4 days. Relative humidity levels remain fairly consistent with the previous month. Weather in February »Weather in March
Following winter's precipitation, March manifests a gradual transition into spring. Temperatures moderate, with a notable monthly high of 44.4°F (6.9°C), an upward swing from February's chill. Residents notice a slight decrease in snowfall and a minor increase in rainfall, indicating the start of the warmer seasons. Weather in March »Weather in April
April in Westport experiences a clear departure from the winter with temperatures rising and skies brightening. Precipitation is predominantly in the form of rainfall, amounting to 3.15" (80mm) dispersed over 15.9 days. The increased hours of daylight and sunshine provide ample opportunities for exploring the city's vibrant landscapes. Weather in April »Weather in May
The weather in May showcases Westport transitioning towards warmer days of the year. The humidity stands at 76%, hinting towards the impending summer. Characteristically, rainfall sees a slight drop from April's recordings while sunshine hours and visibility hold steady. Weather in May »Weather in June
June brings the onset of summer in Westport characterized by warm temperatures and long days. There's a significant increase in daylight hours peaking at 15.1 hours, allowing for more outdoor activities. The increased temperature does not significantly impact the rainfall amount or the number of rainy days. Weather in June »Weather in July
July marks the summer zenith in Westport, with month-high temperatures reaching 81.1°F (27.3°C). The residents enjoy the continued warmth, taking advantage of the longest daylight hours of the year. The UV index climbs to 6, urging the need for sun protection during outdoor pursuits. Weather in July »Weather in August
August continues the summer trend with temperatures slightly cooler than the previous month. The rainfall increases to 3.54" (90mm) spread over 16.8 days of the month. The higher levels of relative humidity could further amplify the perception of heat. Weather in August »Weather in September
September marks the onset of a mellow Connecticut fall. The standards set by August's precipitation remain relatively unchanged, with rainfall accumulating up to 2.72" (69mm) across the span of 13.4 days. The daylight hours reduce but the humidity, wind, and visibility largely maintain the summer trend. Weather in September »Weather in October
In October, significant changes occur in Westport's weather as it truly enters the fall season. The temperature begins a gradual descent, hinting at approaching winter. A rainfall amount of 3.5" (89mm) over 14.3 days sets a moderate basis for precipitation. Weather in October »Weather in November
November's ambiance in Westport is largely influenced by the transition from autumn to winter, reflected by the lower temperature averages. The precipitation records a slight decrease, with rainfall amounting to 2.95" (75mm). The relative humidity and wind speed remain virtually unchanged, in alignment with the previous.month. Weather in November »Weather in December
December brings along the Westport winter with temperatures recording monthly highs and lows of 41.9°F (5.5°C) and 32.9°F (0.5°C), respectively. The onset of the frosty season is marked by an increase in snowfall, accumulating up to 1.77" (45mm). Weather in December »Updated: Jul 25, 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
Temperature records mark January as the coldest month, with highs averaging 35.8°F (2.1°C) and lows at 26.4°F (-3.1°C).
January and February are months with the least rain when the rain falls for 8.3 days and typically aggregates up to 2.36" (60mm) of rain.
Throughout the year, in Westport, there are 166.3 rainfall days, and 37.87" (962mm) of precipitation is accumulated.
January through April, November and December are months with snowfall.
In Westport, during the entire year, snow falls for 24.6 days and aggregates up to 9.61" (244mm) of snow.
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
The months with the highest humidity are February, May and June, with an average relative humidity of 76%.
The month with the most snowfall is February, when snow falls for 7.4 days and typically aggregates up to 2.83" (72mm) of snow.
February has the least sunshine of the year, with an average of 4.7h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Westport, 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.
April and November, with an average relative humidity of 72%, are the least humid months.
May through October are months without snowfall.
The month with the longest days is June, 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.
July brings the highest temperatures in Westport, with an average high of 81.1°F (27.3°C) and an average low of 68.2°F (20.1°C).
The month with the most rainfall is July, when the rain falls for 18.1 days and typically aggregates up to 4.13" (105mm) of precipitation.
With an average of 10.5h of sunshine, July has the most sunshine of the year.
December has the shortest days of the year, with an average of 9h and 18min of daylight.
Average temperature
Westport, CT
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (35.8°F).
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).
Average pressure
Westport, CT
- Average pressure in January:
30.05"Hg - Average pressure in February:
30.02"Hg - Average pressure in March:
30.05"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:
29.96"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Westport, CT
- Average wind speed in January:
10.1mph - Average wind speed in February:
9.8mph - Average wind speed in March:
9.9mph - Average wind speed in April:
9.1mph - Average wind speed in May:
7.6mph - Average wind speed in June:
7mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.6mph - Average wind speed in September:
7.6mph - Average wind speed in October:
9mph - Average wind speed in November:
9.6mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity
Westport, CT
The months with the highest relative humidity are February, May and June (76%).
The months with the lowest relative humidity are April and November (72%).
Average rainfall
Westport, CT
- Average rainfall in January:
2.36" - Average rainfall in February:
2.36" - Average rainfall in March:
2.8" - Average rainfall in April:
3.15" - Average rainfall in May:
3.11" - Average rainfall in June:
3.27"
- Average rainfall in July:
4.13" - Average rainfall in August:
3.54" - Average rainfall in September:
2.72" - Average rainfall in October:
3.5" - Average rainfall in November:
2.95" - Average rainfall in December:
3.98"
The wettest month (with the highest rainfall) is July (4.13").
The driest months (with the least rainfall) are January and February (2.36").
Average rainfall days
Westport, CT
- Average rainfall days in January:
8.3 days - Average rainfall days in February:
9.9 days - Average rainfall days in March:
12.5 days - Average rainfall days in April:
15.9 days - Average rainfall days in May:
17.1 days - Average rainfall days in June:
17.3 days
- Average rainfall days in July:
18.1 days - Average rainfall days in August:
16.8 days - Average rainfall days in September:
13.4 days - Average rainfall days in October:
14.3 days - Average rainfall days in November:
10.5 days - Average rainfall days in December:
12.2 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (8.3 days).
Average snowfall
Westport, CT
The month with the highest snowfall is February (2.83").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Westport, CT
- Average snowfall days in January:
6.7 days - Average snowfall days in February:
7.4 days - Average snowfall days in March:
5 days - Average snowfall days in April:
0.7 days - Average snowfall days in May:
0.2 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:
0.9 days - Average snowfall days in December:
3.6 days
The month with the highest number of snowfall days is February (7.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Westport, CT
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - 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 18min
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 18min).
- Average sunshine in January:
5h and 6min - Average sunshine in February:
4h and 42min - Average sunshine in March:
6h and 12min - Average sunshine in April:
8h and 24min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 36min
- Average sunshine in July:
10h and 30min - Average sunshine in August:
10h and 24min - Average sunshine in September:
8h and 54min - Average sunshine in October:
5h and 54min - Average sunshine in November:
5h and 42min - Average sunshine in December:
4h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days
Westport, CT
- Average sunshine days in January:
17.8 days - Average sunshine days in February:
13.6 days - Average sunshine days in March:
14.6 days - Average sunshine days in April:
12.6 days - Average sunshine days in May:
11.8 days - Average sunshine days in June:
10 days
- Average sunshine days in July:
11.3 days - Average sunshine days in August:
11.5 days - Average sunshine days in September:
14 days - Average sunshine days in October:
14.6 days - Average sunshine days in November:
16.9 days - Average sunshine days in December:
15.4 days
The month with the most sunshine days is January (17.8 days).
The month with the least sunshine days is June (10 days).
Average UV index
Westport, 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, November and December (UV index 2).
Average cloud cover
Westport, CT
The months with the most cloud cover are February, March and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility
Westport, 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).
