Climate and monthly weather forecastGreencastle, PA
Climate and monthly weather forecast
Weather in January
January, the same as December, is another cold winter month in Greencastle, Pennsylvania, with an average temperature fluctuating between 35.4°F (1.9°C) and 22.5°F (-5.3°C). January, known for its average high temperature of 35.4°F (1.9°C) and an average low temperature of 22.5°F (-5.3°C), is the coldest month. Weather in January »Weather in February
The last month of the winter, February, is another cold month in Greencastle, Pennsylvania, with an average temperature varying between 24.6°F (-4.1°C) and 39.9°F (4.4°C). The advent of February denotes an average high-temperature of a still cold 39.9°F (4.4°C), subtly different from January's 35.4°F (1.9°C). Weather in February »Weather in March
The first month of the spring, March, is a chilly month in Greencastle, Pennsylvania, with an average temperature ranging between max 48.7°F (9.3°C) and min 32°F (0°C). March's onset is marked by a subtle temperature increase, moving from an icy 39.9°F (4.4°C) in February to a frosty 48.7°F (9.3°C). Weather in March »Weather in April
April in Greencastle, Pennsylvania, is a comfortable spring month, with an average temperature varying between 41.7°F (5.4°C) and 61.3°F (16.3°C). Noticing a change, the average high-temperature during April moves from March's frosty 48.7°F (9.3°C) to an enjoyable 61.3°F (16.3°C). Weather in April »Weather in May
May, the last month of the spring in Greencastle, is a pleasant month, with an average temperature fluctuating between 71.2°F (21.8°C) and 51.6°F (10.9°C). The commencement of May sees a shift in the average high-temperature, moving from an enjoyable 61.3°F (16.3°C) in April to a pleasant 71.2°F (21.8°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Greencastle, Pennsylvania, with an average temperature ranging between min 58.6°F (14.8°C) and max 79.5°F (26.4°C). Observing a minor shift, the average high-temperature during June adjusts from May's agreeable 71.2°F (21.8°C) to a warm 79.5°F (26.4°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Greencastle, Pennsylvania, with temperature in the range of an average low of 62.6°F (17°C) and an average high of 84.4°F (29.1°C). July stands out as Greencastle's warmest month, with temperatures ranging between an average high of 84.4°F (29.1°C) and a low of 62.6°F (17°C). For July, the heat index is evaluated at a tropical 93.2°F (34°C). Weather in July »Weather in August
August, the last month of the summer in Greencastle, is also a moderately hot month, with temperature in the range of an average high of 81.9°F (27.7°C) and an average low of 61.5°F (16.4°C). The average high-temperature in August, at a still moderately hot 81.9°F (27.7°C), reveals a modest deviation from July's 84.4°F (29.1°C). Weather in August »Weather in September
September, the first month of the autumn in Greencastle, is still a warm month, with an average temperature varying between 74.8°F (23.8°C) and 55.6°F (13.1°C). The transition into September is accompanied by a slight temperature decrease, with the average high-temperature shifting from 81.9°F (27.7°C) in August to a still warm 74.8°F (23.8°C). Weather in September »Weather in October
October, like September, in Greencastle, Pennsylvania, is another refreshing autumn month, with an average temperature varying between 46°F (7.8°C) and 63.3°F (17.4°C). Greencastle's transition into October involves a shift in temperature, receding from a warm 74.8°F (23.8°C) in September to a comfortable 63.3°F (17.4°C). Weather in October »Weather in November
November, the last month of the autumn in Greencastle, is also a fresh month, with an average temperature fluctuating between 34.7°F (1.5°C) and 50.5°F (10.3°C). November comes with a drop in the average high-temperature, falling from October's enjoyable 63.3°F (17.4°C) to a cool 50.5°F (10.3°C). Weather in November »Weather in December
The first month of the winter, December, is also a wintry month in Greencastle, Pennsylvania, with an average temperature ranging between min 28.9°F (-1.7°C) and max 41.2°F (5.1°C). A change in temperatures is noted as November gives way to December, with average highs reducing from a cool 50.5°F (10.3°C) to a wintry 41.2°F (5.1°C). Weather in December »Updated: Aug 30, 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 35.4°F (1.9°C) and a low temperature of 22.5°F (-5.3°C), is Greencastle's coldest month.
The month with the least rainfall is January, when the rain falls for 9.2 days and typically collects 1.85" (47mm) of precipitation.
Throughout the year, there are 161.8 rainfall days, and 28.07" (713mm) of precipitation is accumulated.
Months with snowfall in Greencastle are January through April, October through December.
January is the month with the most snowfall. Snow falls for 8.1 days and accumulates 4.53" (115mm) of snow.
In Greencastle, during the entire year, snow falls for 26.6 days and aggregates up to 14.69" (373mm) of snow.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
February, May, October and December, with an average relative humidity of 79%, are most humid months in Greencastle.
The month with the least sunshine is February, with an average of 4.6h 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.
The months with the lowest humidity are April and July, with an average relative humidity of 75%.
May is the month with the most rainfall. Rain falls for 18.8 days and accumulates 3.15" (80mm) of precipitation.
May through September are months without snowfall.
May through July, with an average maximum UV index of 6, are months with the highest UV index in Greencastle.
June has the longest days of the year, with an average of 14h and 54min of daylight.
July brings the highest temperatures, with an average high of 84.4°F (29.1°C) and an average low of 62.6°F (17°C).
The month with the most sunshine is July, with an average of 10.5h of sunshine.
The month with the shortest days is December, with an average of 9h and 24min of daylight.
Average temperature
Greencastle, PA
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (35.4°F).
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure
Greencastle, PA
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.07"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30.01"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
Greencastle, PA
- Average wind speed in January:
7.7mph - Average wind speed in February:
7.6mph - Average wind speed in March:
7.5mph - Average wind speed in April:
7.5mph - Average wind speed in May:
5.8mph - Average wind speed in June:
5.5mph
- Average wind speed in July:
4.5mph - Average wind speed in August:
4.5mph - Average wind speed in September:
5mph - Average wind speed in October:
6.2mph - Average wind speed in November:
6.6mph - Average wind speed in December:
7mph
The windiest month (with the highest average wind speed) is January (7.7mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).
Average humidity
Greencastle, PA
The months with the highest relative humidity are February, May, October and December (79%).
The months with the lowest relative humidity are April and July (75%).
Average rainfall
Greencastle, PA
- Average rainfall in January:
1.85" - Average rainfall in February:
1.93" - Average rainfall in March:
2.17" - Average rainfall in April:
2.68" - Average rainfall in May:
3.15" - Average rainfall in June:
2.56"
- Average rainfall in July:
2.83" - Average rainfall in August:
2.76" - Average rainfall in September:
1.97" - Average rainfall in October:
2.28" - Average rainfall in November:
1.89" - Average rainfall in December:
2.01"
The wettest month (with the highest rainfall) is May (3.15").
The driest month (with the least rainfall) is January (1.85").
Average rainfall days
Greencastle, PA
- Average rainfall days in January:
9.2 days - Average rainfall days in February:
9.3 days - Average rainfall days in March:
12.6 days - Average rainfall days in April:
16.5 days - Average rainfall days in May:
18.8 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
16.9 days - Average rainfall days in August:
16.8 days - Average rainfall days in September:
14.1 days - Average rainfall days in October:
12.5 days - Average rainfall days in November:
9 days - Average rainfall days in December:
10.3 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is November (9 days).
Average snowfall
Greencastle, PA
The month with the highest snowfall is January (4.53").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Greencastle, PA
- Average snowfall days in January:
8.1 days - Average snowfall days in February:
7.1 days - Average snowfall days in March:
5.3 days - Average snowfall days in April:
0.6 days - Average snowfall days in May:
0 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:
0.7 days - Average snowfall days in December:
4.7 days
The month with the highest number of snowfall days is January (8.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Greencastle, 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:
14h and 54min
- 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: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
4h and 42min - Average sunshine in February:
4h and 36min - Average sunshine in March:
6h and 24min - Average sunshine in April:
8h and 30min - Average sunshine in May:
8h and 36min - Average sunshine in June:
10h and 0min
- Average sunshine in July:
10h and 30min - Average sunshine in August:
10h and 12min - Average sunshine in September:
8h and 36min - Average sunshine in October:
5h and 30min - Average sunshine in November:
5h and 36min - 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 36min).
Average sunshine days
Greencastle, PA
- Average sunshine days in January:
16.4 days - Average sunshine days in February:
14.1 days - Average sunshine days in March:
13.9 days - Average sunshine days in April:
11.5 days - Average sunshine days in May:
10.4 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
12.2 days - Average sunshine days in August:
12.6 days - Average sunshine days in September:
14.4 days - Average sunshine days in October:
16.8 days - Average sunshine days in November:
18.5 days - Average sunshine days in December:
17.1 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (10.4 days).
Average UV index
Greencastle, 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, November and December (UV index 2).
Average cloud cover
Greencastle, PA
The months with the most cloud cover are January, February and December (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility
Greencastle, PA
The months with the highest visibility are April, June, July, August and November (6mi).
The months with the lowest visibility are January, February, March, May, September, October and December (5mi).
