Climate and monthly weather forecastCornwall, PA
Climate and monthly weather forecast
Weather in January
January, the same as December, is an icy winter month in Cornwall, Pennsylvania, with an average temperature varying between 33.8°F (1°C) and 21.6°F (-5.8°C). Cornwall's coldest temperatures are experienced in January, with average high temperatures of 33.8°F (1°C) and lows of 21.6°F (-5.8°C). Weather in January »Weather in February
February, the last month of the winter in Cornwall, is also a wintry month, with an average temperature varying between 37.9°F (3.3°C) and 23.5°F (-4.7°C). At the onset of February, Cornwall records an average high-temperature of a still icy 37.9°F (3.3°C), showing little deviation from the preceding month. Weather in February »Weather in March
The first month of the spring, March, is a frosty month in Cornwall, Pennsylvania, with an average temperature varying between 31.1°F (-0.5°C) and 46.9°F (8.3°C). March witnesses an increase in the average high-temperature, moving from a cold 37.9°F (3.3°C) in February to a chilly 46.9°F (8.3°C). Weather in March »Weather in April
April in Cornwall, Pennsylvania, is a mild spring month, with an average temperature varying between 59.4°F (15.2°C) and 41.4°F (5.2°C). April's arrival signals a temperature shift, moving from a chilly 46.9°F (8.3°C) in March to a refreshing 59.4°F (15.2°C). Weather in April »Weather in May
The last month of the spring, May, is a pleasant month in Cornwall, Pennsylvania, with an average temperature ranging between max 68.7°F (20.4°C) and min 51.1°F (10.6°C). An increase in the average high-temperature marks May, moving from April's refreshing 59.4°F (15.2°C) to a pleasant 68.7°F (20.4°C). Weather in May »Weather in June
June, the first month of the summer in Cornwall, is a moderately hot month, with an average temperature fluctuating between 76.6°F (24.8°C) and 58.6°F (14.8°C). Cornwall's transition into June sees a mild rise in the average high-temperature, edging from an agreeable 68.7°F (20.4°C) in May to a moderately hot 76.6°F (24.8°C). Weather in June »Weather in July
July, like June, in Cornwall, Pennsylvania, is a moderately hot summer month, with an average temperature varying between 82°F (27.8°C) and 63.1°F (17.3°C). July, on average, is the warmest month, registering a high temperature of 82°F (27.8°C) and a low of 63.1°F (17.3°C). The heat index value during July is computed to be a tropical 87.8°F (31°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Cornwall, Pennsylvania, with an average temperature ranging between max 79.9°F (26.6°C) and min 61.7°F (16.5°C). The average high-temperature during August is a still warm 79.9°F (26.6°C), almost matching the conditions of the preceding month. Weather in August »Weather in September
The first month of the autumn, September, is also a moderately hot month in Cornwall, Pennsylvania, with temperature in the range of an average high of 73.8°F (23.2°C) and an average low of 55.4°F (13°C). September is marked by a subtle drop in average high-temperatures, transitioning from 79.9°F (26.6°C) in August to a still warm 73.8°F (23.2°C). Weather in September »Weather in October
October, the same as September, is another refreshing autumn month in Cornwall, Pennsylvania, with an average temperature ranging between min 46°F (7.8°C) and max 61.7°F (16.5°C). Cornwall's transition into October involves a shift in temperature, receding from a warm 73.8°F (23.2°C) in September to a comfortable 61.7°F (16.5°C). Weather in October »Weather in November
The last month of the autumn, November, is another chilly month in Cornwall, Pennsylvania, with an average temperature varying between 49.5°F (9.7°C) and 34.9°F (1.6°C). The onset of November coincides with a reduction in the average high-temperature, falling from a refreshing 61.7°F (16.5°C) in October to a chilly 49.5°F (9.7°C). Weather in November »Weather in December
December, the first month of the winter in Cornwall, is also a wintry month, with an average temperature fluctuating between 29.3°F (-1.5°C) and 40.3°F (4.6°C). Stepping into December, Cornwall observes a temperature decline, with the average high falling from November's frosty 49.5°F (9.7°C) to a wintry 40.3°F (4.6°C). Weather in December »Updated: Jul 3, 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
The lowest temperatures are recorded in January, with averages reaching a high of 33.8°F (1°C) and a low of 21.6°F (-5.8°C).
In Cornwall, during the entire year, the rain falls for 137.4 days and collects up to 16.26" (413mm) of precipitation.
Months with snowfall are January through May, October through December.
January is the month with the most snowfall. Snow falls for 5.2 days and accumulates 1.97" (50mm) of snow.
Throughout the year, there are 19.5 snowfall days, and 6.69" (170mm) of snow is accumulated.
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
February, May and October, with an average relative humidity of 81%, are most humid months.
The month with the least rainfall is February, when the rain falls for 7.8 days and typically collects 0.94" (24mm) of precipitation.
February has the least sunshine of the year, with an average of 4.5h of sunshine.
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.
With an average relative humidity of 76%, April is the least humid month.
The months with the highest UV index are May through July, with an average maximum UV index of 6.
In Cornwall, snow does not fall in June through September.
The month with the longest days is June, with an average of 15h and 0min of daylight.
Cornwall notes the warmest temperatures in July, with a average high of 82°F (27.8°C) and a low of 63.1°F (17.3°C).
July has the most sunshine of the year, with an average of 10.4h of sunshine.
The month with the most rainfall is August, when the rain falls for 14.7 days and typically aggregates up to 2.13" (54mm) of precipitation.
December has the shortest days of the year, with an average of 9h and 24min of daylight.
Average temperature
Cornwall, PA
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.8°F).
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure
Cornwall, PA
- Average pressure in January:
30.09"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Cornwall, PA
- Average wind speed in January:
8.5mph - Average wind speed in February:
8.6mph - Average wind speed in March:
8.8mph - Average wind speed in April:
8.6mph - Average wind speed in May:
6.6mph - Average wind speed in June:
6.1mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity
Cornwall, PA
The months with the highest relative humidity are February, May and October (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall
Cornwall, PA
- Average rainfall in January:
1.06" - Average rainfall in February:
0.94" - Average rainfall in March:
1.18" - Average rainfall in April:
1.26" - Average rainfall in May:
1.61" - Average rainfall in June:
1.38"
- Average rainfall in July:
1.93" - Average rainfall in August:
2.13" - Average rainfall in September:
1.02" - Average rainfall in October:
1.42" - Average rainfall in November:
1.22" - Average rainfall in December:
1.1"
The wettest month (with the highest rainfall) is August (2.13").
The driest month (with the least rainfall) is February (0.94").
Average rainfall days
Cornwall, PA
- Average rainfall days in January:
6.7 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
10.9 days - Average rainfall days in April:
12.7 days - Average rainfall days in May:
15.9 days - Average rainfall days in June:
14.8 days
- Average rainfall days in July:
15.6 days - Average rainfall days in August:
14.7 days - Average rainfall days in September:
10.5 days - Average rainfall days in October:
11.4 days - Average rainfall days in November:
7.2 days - Average rainfall days in December:
9.2 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (6.7 days).
Average snowfall
Cornwall, PA
- Average snowfall in January:
1.97" - Average snowfall in February:
1.5" - Average snowfall in March:
1.65" - Average snowfall in April:
0.04" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is January (1.97").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Cornwall, PA
- Average snowfall days in January:
5.2 days - Average snowfall days in February:
5.1 days - Average snowfall days in March:
4.2 days - Average snowfall days in April:
0.3 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:
1.1 days - Average snowfall days in December:
3.3 days
The month with the highest number of snowfall days is January (5.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Cornwall, 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:
4h and 36min - Average sunshine in February:
4h and 30min - Average sunshine in March:
6h and 18min - Average sunshine in April:
8h and 6min - Average sunshine in May:
8h and 12min - Average sunshine in June:
9h and 48min
- Average sunshine in July:
10h and 24min - Average sunshine in August:
9h and 48min - Average sunshine in September:
8h and 48min - Average sunshine in October:
5h and 18min - Average sunshine in November:
5h and 18min - Average sunshine in December:
4h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days
Cornwall, PA
- Average sunshine days in January:
20.3 days - Average sunshine days in February:
15.3 days - Average sunshine days in March:
16.3 days - Average sunshine days in April:
15.3 days - Average sunshine days in May:
11.5 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
11.8 days - Average sunshine days in August:
13.4 days - Average sunshine days in September:
16.5 days - Average sunshine days in October:
17.5 days - Average sunshine days in November:
19.6 days - Average sunshine days in December:
18.7 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is May (11.5 days).
Average UV index
Cornwall, PA
The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Cornwall, PA
The months with the most cloud cover are February and December (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility
Cornwall, PA
The months with the highest visibility are January, February, March, April, June, July, November and December (6mi).
The months with the lowest visibility are May, August, September and October (5mi).
