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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, is a wintry winter month in Derry, Pennsylvania, with an average temperature varying between 32.2°F (0.1°C) and 19.8°F (-6.8°C). With average high and low temperatures of 32.2°F (0.1°C) and 19.8°F (-6.8°C) respectively, January is Derry's coldest month. Weather in January »
Weather in February
February, the last month of the winter in Derry, is also an icy month, with an average temperature ranging between max 36.1°F (2.3°C) and min 22.5°F (-5.3°C). As Derry steps into February, the average high-temperature holds at a still wintry 36.1°F (2.3°C), hinting at a minor fluctuation from the prior month. Weather in February »
Weather in March
March, the first month of the spring in Derry, is a chilly month, with an average temperature ranging between max 45.1°F (7.3°C) and min 29.7°F (-1.3°C). Derry sees an increase in the average high-temperature with the arrival of March, moving from February's wintry 36.1°F (2.3°C) to a chilly 45.1°F (7.3°C). Weather in March »
Weather in April
April in Derry, Pennsylvania, is a moderate spring month, with an average temperature ranging between min 39.4°F (4.1°C) and max 58.3°F (14.6°C). Derry's weather in April presents a rise in the average high-temperature, moving from a chilly 45.1°F (7.3°C) in March to a moderate 58.3°F (14.6°C). Weather in April »
Weather in May
May, the last month of the spring in Derry, is a pleasant month, with temperature in the range of an average high of 69.4°F (20.8°C) and an average low of 49.5°F (9.7°C). Derry in May sees a temperature change, with average high-temperatures moving from a moderate 58.3°F (14.6°C) in April to an agreeable 69.4°F (20.8°C). Weather in May »
Weather in June
June, the first month of the summer in Derry, is a warm month, with temperature in the range of an average low of 55.6°F (13.1°C) and an average high of 76.6°F (24.8°C). June's onset brings a minor rise in the average high-temperature, moving from a pleasant 69.4°F (20.8°C) in May to a warm 76.6°F (24.8°C). Weather in June »
Weather in July
July, like June, in Derry, Pennsylvania, is another warm summer month, with an average temperature ranging between max 81.1°F (27.3°C) and min 59.5°F (15.3°C). July registers as the month with the highest average temperatures, reaching 81.1°F (27.3°C) at its peak and 59.5°F (15.3°C) at the lowest. The average heat index in July is computed to be a tropical 86°F (30°C). Weather in July »
Weather in August
August, the last month of the summer in Derry, is also a moderately hot month, with temperature in the range of an average high of 79.3°F (26.3°C) and an average low of 57.6°F (14.2°C). Derry registers an average high-temperature of a still warm 79.3°F (26.3°C) with the arrival of August, showing minor deviation from the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Derry, Pennsylvania, with an average temperature varying between 52.9°F (11.6°C) and 72.9°F (22.7°C). With the arrival of September, Derry notices a mild change in the average high-temperature, sliding from August's moderately hot 79.3°F (26.3°C) to a pleasant 72.9°F (22.7°C). Weather in September »
Weather in October
October, like September, is another refreshing autumn month in Derry, Pennsylvania, with an average temperature fluctuating between 60.6°F (15.9°C) and 43.7°F (6.5°C). The arrival of October corresponds with a reduction in the average high-temperature, down from September's agreeable 72.9°F (22.7°C) to a refreshing 60.6°F (15.9°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Derry, Pennsylvania, with an average temperature fluctuating between 32.5°F (0.3°C) and 47.7°F (8.7°C). The arrival of November corresponds with a temperature reduction, down from October's moderate 60.6°F (15.9°C) to a chilly 47.7°F (8.7°C). Weather in November »
Weather in December
December, the first month of the winter in Derry, is still a cold month, with an average temperature varying between 38.3°F (3.5°C) and 27.1°F (-2.7°C). In December, the average high-temperature decreases from a chilly 47.7°F (8.7°C) in November to an icy 38.3°F (3.5°C). Weather in December »
Updated: Jun 4, 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
What time of the year is the coldest?
January tends to be the coldest month, with temperatures averaging a daily high of 32.2°F (0.1°C) and a low of 19.8°F (-6.8°C).
What is the most humid month?
January and February, with an average relative humidity of 86%, are most humid months.
How much does it rain?
Throughout the year, there are 156.2 rainfall days, and 19.45" (494mm) of precipitation is accumulated.
When does it snow in Derry?
Months with snowfall are January through May, October through December.
When does it snow the most?
January is the month with the most snowfall. Snow falls for 13.1 days and accumulates 3.94" (100mm) of snow.
How many days does it snow?
In Derry, during the entire year, snow falls for 49.9 days and aggregates up to 18.11" (460mm) of snow.
What is the month with the least sunshine?
With an average of 3h of sunshine, January has the least sunshine of the year.
When is Daylight Saving Time (DST)?
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.
What are the least humid months?
The months with the lowest humidity are April, July and August, with an average relative humidity of 78%.
What is the rainiest month?
The month with the most rainfall is May, when the rain falls for 19.8 days and typically aggregates up to 2.32" (59mm) of precipitation.
When it does not snow?
June through September are months without snowfall.
When are the longest days?
The month with the longest days is June, with an average of 15h and 0min of daylight.
What are the months with the highest UV index?
June and July, with an average maximum UV index of 6, are months with the highest UV index.
What time of the year is the hottest?
The month of July, characterized by an average high of 81.1°F (27.3°C) and a low of 59.5°F (15.3°C), is recognized as the warmest.
What are the months with the most sunshine?
The months with the most sunshine are July and August, with an average of 10h of sunshine.
What is the driest month?
The month with the least rainfall is November, when the rain falls for 8.8 days and typically collects 1.02" (26mm) of precipitation.
What is the month with the shortest days?
With an average of 9h and 24min of daylight, December has the shortest days of the year.
When is the lowest UV index?
December is the month with the lowest UV index, with an average maximum UV index of 1.
Average temperature
Derry, PA
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (32.2°F).
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure
Derry, 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:
30.03"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
Derry, PA
- Average wind speed in January:
9.2mph - Average wind speed in February:
8.9mph - Average wind speed in March:
8.3mph - Average wind speed in April:
8.3mph - Average wind speed in May:
6.7mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.2mph - Average wind speed in August:
5mph - Average wind speed in September:
5.6mph - Average wind speed in October:
7mph - Average wind speed in November:
7.6mph - Average wind speed in December:
8.6mph
The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity
Derry, PA
The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are April, July and August (78%).
Average rainfall
Derry, PA
- Average rainfall in January:
1.3" - Average rainfall in February:
1.61" - Average rainfall in March:
1.65" - Average rainfall in April:
1.73" - Average rainfall in May:
2.32" - Average rainfall in June:
1.81"
- Average rainfall in July:
1.89" - Average rainfall in August:
1.54" - Average rainfall in September:
1.22" - Average rainfall in October:
1.61" - Average rainfall in November:
1.02" - Average rainfall in December:
1.73"
The wettest month (with the highest rainfall) is May (2.32").
The driest month (with the least rainfall) is November (1.02").
Average rainfall days
Derry, PA
- Average rainfall days in January:
7.6 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
13.1 days - Average rainfall days in April:
15.7 days - Average rainfall days in May:
19.8 days - Average rainfall days in June:
16 days
- Average rainfall days in July:
16.6 days - Average rainfall days in August:
14.8 days - Average rainfall days in September:
12.4 days - Average rainfall days in October:
13.5 days - Average rainfall days in November:
8.8 days - Average rainfall days in December:
10.1 days
The month with the highest number of rainy days is May (19.8 days).
The month with the least rainy days is January (7.6 days).
Average snowfall
Derry, PA
- Average snowfall in January:
3.94" - Average snowfall in February:
3.82" - Average snowfall in March:
3.66" - Average snowfall in April:
0.67" - Average snowfall in May:
0.16" - Average snowfall in June:
0"
The month with the highest snowfall is January (3.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Derry, PA
- Average snowfall days in January:
13.1 days - Average snowfall days in February:
11.3 days - Average snowfall days in March:
8.3 days - Average snowfall days in April:
2.3 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:
4.5 days - Average snowfall days in December:
9.5 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Derry, PA
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 2min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 2min
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:
3h - Average sunshine in February:
3h and 3min - Average sunshine in March:
5h and 2min - Average sunshine in April:
7h and 4min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 2min
- Average sunshine in July:
10h - Average sunshine in August:
10h - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 1min - Average sunshine in November:
4h and 5min - Average sunshine in December:
3h and 3min
The months with the most sunshine are July and August (Average sunshine: 10h).
The month with the least sunshine is January (Average sunshine: 3h).
Average sunshine days
Derry, PA
- Average sunshine days in January:
12.6 days - Average sunshine days in February:
11.8 days - Average sunshine days in March:
11.6 days - Average sunshine days in April:
11.1 days - Average sunshine days in May:
8.9 days - Average sunshine days in June:
11.6 days
- Average sunshine days in July:
12 days - Average sunshine days in August:
13.8 days - Average sunshine days in September:
13.9 days - Average sunshine days in October:
14.8 days - Average sunshine days in November:
18 days - Average sunshine days in December:
13.3 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is May (8.9 days).
Average UV index
Derry, PA
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Derry, PA
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility
Derry, PA
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).
Derry, Pennsylvania, USA
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