Climate and monthly weather forecastWest Cornwall, CT
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in West Cornwall, Connecticut, with an average temperature ranging between min 18.9°F (-7.3°C) and max 30.9°F (-0.6°C). January stands out as West Cornwall's coldest month, with an average high-temperature of 30.9°F (-0.6°C) and a low-temperature of 18.9°F (-7.3°C). Weather in January »Weather in February
The last month of the winter, February, is a wintry month in West Cornwall, Connecticut, with an average temperature varying between 34.3°F (1.3°C) and 19.8°F (-6.8°C). The start of February marks an average high-temperature of an icy 34.3°F (1.3°C), hardly distinguishable from the conditions in January. Weather in February »Weather in March
The first month of the spring, March, is also an icy month in West Cornwall, Connecticut, with temperature in the range of an average low of 27.5°F (-2.5°C) and an average high of 42.3°F (5.7°C). West Cornwall, Connecticut, perceives a slight temperature ascent during March, with average high-temperatures adjusting from a cold 34.3°F (1.3°C) in February to a still icy 42.3°F (5.7°C). Weather in March »Weather in April
April is a fresh spring month in West Cornwall, Connecticut, with an average temperature ranging between max 55.2°F (12.9°C) and min 37.6°F (3.1°C). April indicates a change in the average high-temperature, moving up from a wintry 42.3°F (5.7°C) in March to a cool 55.2°F (12.9°C). Weather in April »Weather in May
The last month of the spring, May, is a refreshing month in West Cornwall, Connecticut, with an average temperature fluctuating between 47.7°F (8.7°C) and 67.5°F (19.7°C). With the transition into May, West Cornwall experiences an increase in average high-temperatures, moving up from a fresh 55.2°F (12.9°C) in April to an enjoyable 67.5°F (19.7°C). Weather in May »Weather in June
June, the first month of the summer in West Cornwall, is a moderately hot month, with an average temperature varying between 54.9°F (12.7°C) and 74.8°F (23.8°C). In June, the average high-temperature marginally rises from a comfortable 67.5°F (19.7°C) in May to a moderately hot 74.8°F (23.8°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in West Cornwall, Connecticut, with an average temperature fluctuating between 81.1°F (27.3°C) and 61.3°F (16.3°C). July is the warmest month of the year, registering average temperatures as high as 81.1°F (27.3°C) and as low as 61.3°F (16.3°C). The heat index value during July is computed to be a hot 86°F (30°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in West Cornwall, Connecticut, with temperature in the range of an average high of 79.2°F (26.2°C) and an average low of 59.4°F (15.2°C). August's arrival brings an average high-temperature of a still warm 79.2°F (26.2°C), slightly deviating from July's 81.1°F (27.3°C). Weather in August »Weather in September
September, the first month of the autumn in West Cornwall, is still a pleasant month, with an average temperature fluctuating between 53.4°F (11.9°C) and 72°F (22.2°C). The average high-temperature shows a slight dip in September, from August's warm 79.2°F (26.2°C) to a pleasant 72°F (22.2°C). Weather in September »Weather in October
October, the same as September, in West Cornwall, Connecticut, is a moderate autumn month, with an average temperature ranging between max 59°F (15°C) and min 44.1°F (6.7°C). The transition into October is accompanied by a temperature decrease, with the average high-temperature shifting from a pleasant 72°F (22.2°C) in September to a moderate 59°F (15°C). Weather in October »Weather in November
The last month of the autumn, November, is another chilly month in West Cornwall, Connecticut, with an average temperature fluctuating between 46.6°F (8.1°C) and 33.3°F (0.7°C). West Cornwall in November undergoes a mild reduction in the average high-temperature, shifting from October's mild 59°F (15°C) to a chilly 46.6°F (8.1°C). Weather in November »Weather in December
December, the first month of the winter in West Cornwall, is still a cold month, with temperature in the range of an average high of 36.7°F (2.6°C) and an average low of 25.7°F (-3.5°C). With the beginning of December, the average high-temperature shows a decrease, transitioning from a chilly 46.6°F (8.1°C) in November to a wintry 36.7°F (2.6°C). Weather in December »Updated: Feb 10, 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
January, recording an average high temperature of 30.9°F (-0.6°C) and a low temperature of 18.9°F (-7.3°C), is West Cornwall's coldest month.
January is the month with the least rainfall in West Cornwall, Connecticut. Rain falls for 7.7 days and accumulates 2.17" (55mm) of precipitation.
Throughout the year, in West Cornwall, there are 160.5 rainfall days, and 33.86" (860mm) of precipitation is accumulated.
Months with snowfall in West Cornwall are January through May, October through December.
In West Cornwall, during the entire year, snow falls for 40.2 days and aggregates up to 20.39" (518mm) of snow.
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
With an average relative humidity of 82%, February is the most humid month.
February is the month with the most snowfall in West Cornwall, Connecticut. Snow falls for 10.3 days and accumulates 5.16" (131mm) of snow.
The month with the least sunshine in West Cornwall, Connecticut, is February, with an average of 4.2h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in West Cornwall, Connecticut, 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 least humid month in West Cornwall is April, with an average relative humidity of 74%.
In West Cornwall, snow does not fall in June through September.
With an average of 15h and 12min of daylight, June has the longest days of the year in West Cornwall, Connecticut.
The month with the highest UV index is June, with an average maximum UV index of 6.
West Cornwall notes the warmest temperatures in July, with a average high of 81.1°F (27.3°C) and a low of 61.3°F (16.3°C).
The month with the most rainfall in West Cornwall, Connecticut, is July, when the rain falls for 17.9 days and typically aggregates up to 3.54" (90mm) of precipitation.
With an average of 10.1h of sunshine, July has the most sunshine of the year in West Cornwall, Connecticut.
The month with the shortest days in West Cornwall is December, with an average of 9h and 12min of daylight.
Average temperature
West Cornwall, 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 (30.9°F).
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure
West Cornwall, CT
- Average pressure in January:
30.04"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:
29.95"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.01"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
West Cornwall, CT
- Average wind speed in January:
8mph - Average wind speed in February:
7.8mph - Average wind speed in March:
8mph - Average wind speed in April:
7.6mph - Average wind speed in May:
6.2mph - Average wind speed in June:
5.6mph
- Average wind speed in July:
5mph - Average wind speed in August:
5mph - Average wind speed in September:
5.5mph - Average wind speed in October:
6.8mph - Average wind speed in November:
7.2mph - Average wind speed in December:
7.5mph
The windiest months (with the highest average wind speed) are January and March (8mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).
Average humidity
West Cornwall, CT
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (74%).
Average rainfall
West Cornwall, CT
- Average rainfall in January:
2.17" - Average rainfall in February:
2.2" - Average rainfall in March:
2.44" - Average rainfall in April:
2.95" - Average rainfall in May:
3.03" - Average rainfall in June:
3.07"
- Average rainfall in July:
3.54" - Average rainfall in August:
2.87" - Average rainfall in September:
2.24" - Average rainfall in October:
3.15" - Average rainfall in November:
2.83" - Average rainfall in December:
3.35"
The wettest month (with the highest rainfall) is July (3.54").
The driest month (with the least rainfall) is January (2.17").
Average rainfall days
West Cornwall, CT
- Average rainfall days in January:
7.7 days - Average rainfall days in February:
8.2 days - Average rainfall days in March:
12.4 days - Average rainfall days in April:
15.3 days - Average rainfall days in May:
16.9 days - Average rainfall days in June:
17.5 days
- Average rainfall days in July:
17.9 days - Average rainfall days in August:
16.3 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
13 days - Average rainfall days in November:
10.9 days - Average rainfall days in December:
10.9 days
The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is January (7.7 days).
Average snowfall
West Cornwall, CT
- Average snowfall in January:
4.57" - Average snowfall in February:
5.16" - Average snowfall in March:
4.09" - Average snowfall in April:
0.87" - Average snowfall in May:
0.24" - Average snowfall in June:
0"
The month with the highest snowfall is February (5.16").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
West Cornwall, CT
- Average snowfall days in January:
9.3 days - Average snowfall days in February:
10.3 days - Average snowfall days in March:
8.4 days - Average snowfall days in April:
1.4 days - Average snowfall days in May:
0.3 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:
0.6 days - Average snowfall days in November:
2.8 days - Average snowfall days in December:
7.1 days
The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
West Cornwall, CT
- Average daylight in January:
9h and 30min - 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 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - 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 48min - Average daylight in December:
9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
4h and 42min - Average sunshine in February:
4h and 12min - Average sunshine in March:
5h and 48min - Average sunshine in April:
8h and 0min - Average sunshine in May:
8h and 12min - Average sunshine in June:
9h and 12min
- Average sunshine in July:
10h and 6min - Average sunshine in August:
10h and 0min - Average sunshine in September:
8h and 30min - Average sunshine in October:
5h and 30min - Average sunshine in November:
5h and 18min - Average sunshine in December:
4h and 30min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days
West Cornwall, CT
- Average sunshine days in January:
16.8 days - Average sunshine days in February:
13.1 days - Average sunshine days in March:
12.8 days - Average sunshine days in April:
12.8 days - Average sunshine days in May:
12 days - Average sunshine days in June:
10.8 days
- Average sunshine days in July:
11.3 days - Average sunshine days in August:
12.2 days - Average sunshine days in September:
14.7 days - Average sunshine days in October:
15.5 days - Average sunshine days in November:
16.6 days - Average sunshine days in December:
14.8 days
The month with the most sunshine days is January (16.8 days).
The month with the least sunshine days is June (10.8 days).
Average UV index
West Cornwall, CT
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
West Cornwall, CT
The month with the most cloud cover is February (Cloud cover 53).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility
West Cornwall, CT
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
