Climate and monthly weather forecastSomerset, PA
Climate and monthly weather forecast
The climate of Somerset
Positioned in the northeastern United States, Somerset, Pennsylvania falls under the Köppen climate classification Cfa, designating it as a region characterized by a humid subtropical climate with no defined dry season. In alignment with this classification, a clear differentiation exists between the four seasons with varying weather conditions throughout the years.Throughout the year, the temperature fluctuates greatly from 18.3°F (-7.6°C) to a high of 78.8°F (26°C). Precipitation, in the form of both rainfall and snowfall, also varies throughout the months, with rainfall peaking at 3.66" (93mm) in May and snowfall reaching up to 7.48" (190mm) in January. Humidity remains relatively steady throughout the year, oscillating between 79% to 87%. Lastly, the levels of sunlight and cloud cover also oscillate, with sunlight ranging from 2.7 hours per day in January to a high of 9.4 hours in July.
Exclusive to this region is the occurrence of significant snowfall, the absence of a dry season, and a consistent humidity level, making it a unique climate zone in the United States.
The best time to visit Somerset
The decision of when to visit Somerset hinges upon individual preferences for temperature and activities. However, the warmer months from May to September, when temperatures range from 67.3°F (19.6°C) to 78.8°F (26°C), are generally more favorable. This period exhibits a dramatic increase in both daylight hours and sunshine with peak sunlight hours of 9.4 in July. Rainfall during these months is steady but not excessive, ranging from 2.68 to 3.66" (93mm), which ensures a pleasant outdoor experience for visitors.The worst time to visit Somerset
The least favorable time to visit Somerset would be the winter months between December and February. The temperature dips to a low range between 18.3°F (-7.6°C) to 30.7°F (-0.7°C), which might be too chilly for some, especially those unaccustomed to colder climates. Snowfall during these months is prominent, reaching 7.48" (190mm) in January. The limited daylight hours and lower sunshine durations during this season further discourage tourist activities.Spring weather in Somerset
Spring is a period of rapid warming in Somerset with temperatures rising from 44.2°F (6.8°C) in March to 67.3°F (19.6°C) in May. Rainfall levels are slightly higher during this season, especially in May where it escalates to 3.66" (93mm). This period also sees longer daylight hours, increasing from 12 hours in March to 14.4 hours by May.Summer weather in Somerset
Summer is the season of warmth and sunshine in Somerset. The period from June through August witnesses temperatures reaching a peak of 78.8°F (26°C) in July and with the least rainfall in August at 2.32" (59mm). Daylight hours remain lengthy, peaking at 15 hours in June. This season provides ample opportunity for outdoor activities with maximum sunshine of 9.4 hours in July.Autumn weather in Somerset
Autumn sees a significant cooling in Somerset with temperatures steadily declining from a high of 71.1°F (21.7°C) in September to a lower 46.2°F (7.9°C) by November. Rainfall also sees a rise in this season, peaking at 2.87" (73mm) in October. The duration of sunlight gradually decreases, dipping from 12.4 hours in September to 10 hours in November, indicating a transition to the colder months.Winter weather in Somerset
Winter in Somerset is epitomized by freezing temperatures and snowfall. The coldest months are December to February, with January having the lowest average temperature of 18.3°F (-7.6°C). January also records the highest snowfall of 7.48" (190mm). The short daylight hours and cold conditions might deter outdoor activities but provide a unique winter landscape for those interested.Weather in January
January manifests itself as one of the more wintry months in Somerset, Pennsylvania, with chilly temperatures combined with persistent precipitation. The town is shrouded frequently under a blanket of clouds with 74% cloud cover. Weather in January »Weather in February
Comparatively milder than January, February in Somerset sees a subtle uptick in temperature. Wind speed decreases slightly, complimenting the weather with comparatively less blustering gusts. However, the month is not devoid of snow, measuring 6.81" (173mm), making it another month that is attractive to winter sports enthusiasts. Weather in February »Weather in March
With the arrival of March begins the gradual transition out of winter. The town witnesses longer daylight hours as the days grow longer, nudging up the outdoor activity possibilities. Winter does not lose its grip just yet as snowfall persists although at a diminishing amount from the previous months. Weather in March »Weather in April
April signals a clear migration away from winter towards warmer days in Somerset. Spring bursts into life with the increasing duration of daylight and greater visibility. However, April receives the highest rainfall of the year, recording 3.27" (83mm), transforming the landscape into a lush green spectacle. Weather in April »Weather in May
May in Somerset is a celebration of spring with pleasant weather characterizing the town. The mercury level continues to trend upwards, while the frequency of rainfall starts to decrease. A mix of sunshine and rain sets up the perfect conditions for the blossoming of vibrant flowers. Weather in May »Weather in June
June marks the advent of summer with noticeably higher temperatures. The days get longer, allowing more sunshine and warmth to envelop the town. The blend of warm temperatures and sufficient rainfall ensures that the lush greenery thrives. Weather in June »Weather in July
July reigns as the warmest month in Somerset, with the highest average temperature of 78.8°F (26°C). The long hours of daylight and clear weather make it the perfect month for outdoor activities. Somerset residents and tourists alike bask in the pleasant warmth during this peak summer month. Weather in July »Weather in August
August maintains the summer heat, yet starts to show a slight regression in temperatures compared to July. The days remain long, paving the way for numerous outdoor pursuits. Somerset gleams under the clear blue skies with a low average cloud cover of 41%. Weather in August »Weather in September
September reveals the early signs of fall with a dip in mercury levels. The transition phase between warm summer and cool fall gives birth to a delightful climate. A significant reduction in humidity marks the changing of the seasons, making way for the upcoming crisp autumn air. Weather in September »Weather in October
In Somerset, October fully embraces the Autumn season with a noticeable drop in temperatures and an increase in rainfall. Visitors and locals enjoy cooler breezes and vibrant fall foliage spread across the town. The shift in climate results in days getting shorter and an increased probability of rainfall, measuring 2.87" (73mm). Weather in October »Weather in November
November sees Somerset transitioning into winter with a further decrease in temperature and an increase in snowfall. The skies remain largely cloud-covered, setting a frosty ambiance across the town. After the dry October, November hosts the year’s lowest rainfall, amounting to 1.97" (50mm) of precipitation. Weather in November »Weather in December
December welcomes winter in full force, with temperatures dropping further as compared to November. Snowfall intensifies as the month progresses, providing a charming white landscape for winter enthusiasts. With an average of 9.4 daylight hours, the days are considerably shorter, adding to the winter charm. Weather in December »Updated: Jul 7, 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
Somerset notes the coldest temperatures in January, with a average high of 30.7°F (-0.7°C) and a low of 18.3°F (-7.6°C).
The months with the highest humidity are January and February, with an average relative humidity of 87%.
In Somerset, during the entire year, the rain falls for 168.6 days and collects up to 34.09" (866mm) of precipitation.
January through May, October through December are months with snowfall.
The month with the most snowfall is January, when snow falls for 15.3 days and typically aggregates up to 7.48" (190mm) of snow.
Throughout the year, there are 63.9 snowfall days, and 33.54" (852mm) of snow is accumulated.
With an average of 2.7h of sunshine, January has the least sunshine of the year.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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.
The months with the lowest humidity in Somerset are April and July, with an average relative humidity of 79%.
May is the month with the most rainfall. Rain falls for 21 days and accumulates 3.66" (93mm) of precipitation.
The months with the highest UV index in Somerset are May through August, with an average maximum UV index of 5.
June through September are months without snowfall.
With an average of 15h and 0min of daylight, June has the longest days of the year in Somerset.
July tends to be the warmest month, with temperatures averaging a daily high of 78.8°F (26°C) and a low of 58.6°F (14.8°C).
July has the most sunshine of the year, with an average of 9.4h of sunshine.
The month with the least rainfall in Somerset is November, when the rain falls for 8.8 days and typically collects 1.97" (50mm) of precipitation.
With an average of 9h and 24min of daylight, December has the shortest days of the year.
The month with the lowest UV index is December, with an average maximum UV index of 1.
Average temperature
Somerset, PA
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (30.7°F).
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure
Somerset, PA
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30"Hg - Average pressure in June:
29.95"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed
Somerset, PA
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.1mph - Average wind speed in March:
9.3mph - Average wind speed in April:
9.1mph - Average wind speed in May:
7.5mph - Average wind speed in June:
6.8mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.5mph - Average wind speed in September:
6.1mph - Average wind speed in October:
7.6mph - Average wind speed in November:
8.5mph - Average wind speed in December:
9.6mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity
Somerset, PA
The months with the highest relative humidity are January and February (87%).
The months with the lowest relative humidity are April and July (79%).
Average rainfall
Somerset, PA
- Average rainfall in January:
2.76" - Average rainfall in February:
2.91" - Average rainfall in March:
2.99" - Average rainfall in April:
3.27" - Average rainfall in May:
3.66" - Average rainfall in June:
2.68"
- Average rainfall in July:
3.11" - Average rainfall in August:
2.32" - Average rainfall in September:
2.28" - Average rainfall in October:
2.87" - Average rainfall in November:
1.97" - Average rainfall in December:
3.27"
The wettest month (with the highest rainfall) is May (3.66").
The driest month (with the least rainfall) is November (1.97").
Average rainfall days
Somerset, PA
- Average rainfall days in January:
8.5 days - Average rainfall days in February:
8.1 days - Average rainfall days in March:
12.4 days - Average rainfall days in April:
17 days - Average rainfall days in May:
21 days - Average rainfall days in June:
18.6 days
- Average rainfall days in July:
17.1 days - Average rainfall days in August:
16.1 days - Average rainfall days in September:
15.5 days - Average rainfall days in October:
14.9 days - Average rainfall days in November:
8.8 days - Average rainfall days in December:
10.6 days
The month with the highest number of rainy days is May (21 days).
The month with the least rainy days is February (8.1 days).
Average snowfall
Somerset, PA
- Average snowfall in January:
7.48" - Average snowfall in February:
6.81" - Average snowfall in March:
6.42" - Average snowfall in April:
1.5" - Average snowfall in May:
0.35" - Average snowfall in June:
0"
The month with the highest snowfall is January (7.48").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Somerset, PA
- Average snowfall days in January:
15.3 days - Average snowfall days in February:
13.7 days - Average snowfall days in March:
10.5 days - Average snowfall days in April:
3 days - Average snowfall days in May:
0.7 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:
2 days - Average snowfall days in November:
6.7 days - Average snowfall days in December:
12 days
The month with the highest number of snowfall days is January (15.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Somerset, PA
- Average daylight in January:
9h and 42min - 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 24min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 42min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
2h and 42min - Average sunshine in February:
3h and 18min - Average sunshine in March:
5h and 0min - Average sunshine in April:
7h and 6min - Average sunshine in May:
7h and 54min - Average sunshine in June:
8h and 48min
- Average sunshine in July:
9h and 24min - Average sunshine in August:
9h and 18min - Average sunshine in September:
8h and 0min - Average sunshine in October:
4h and 54min - Average sunshine in November:
4h and 36min - Average sunshine in December:
3h and 12min
The month with the most sunshine is July (Average sunshine: 9h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days
Somerset, PA
- Average sunshine days in January:
9 days - Average sunshine days in February:
7.8 days - Average sunshine days in March:
9.8 days - Average sunshine days in April:
10.4 days - Average sunshine days in May:
8.8 days - Average sunshine days in June:
10.3 days
- Average sunshine days in July:
12.3 days - Average sunshine days in August:
12.7 days - Average sunshine days in September:
12.7 days - Average sunshine days in October:
13.4 days - Average sunshine days in November:
14.2 days - Average sunshine days in December:
10.3 days
The month with the most sunshine days is November (14.2 days).
The month with the least sunshine days is February (7.8 days).
Average UV index
Somerset, PA
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Somerset, PA
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is August (Cloud cover 41).
Average visibility
Somerset, PA
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).
