Greencastle, Pennsylvania Climate

United States

Pop. 4,043 Elev. 179 m / 587 ft TZ: America/New_York (UTC-4) ·

Greencastle sees warm summers peaking at 89°F (32°C) in July, and frigid winters that bottom out around 22°F (-6°C) in January. Humidity pushes the summer feels-like temperature to 103°F (39°C), while wind chill can drive winter lows to 14°F (-10°C). Precipitation occurs on roughly 59 days per year (32.1 in / 815 mm total), with snow on 4 days and 25 in (631 mm) of annual accumulation. The city averages 116 sunny days per year and around 33 thunderstorm days.

Temperature 89°F (32°C) high 22°F (-6°C) low
Feels like 103°F (39°C) high 14°F (-10°C) low
Rain 59 days 32.1 in (815 mm) /yr
Snow 4 days 24.8 in (631 mm) /yr
Sky 116 sunny 33 stormy
Wind 2.2 mph (1.0 m/s) avg

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Monthly Climate Chart

↓ Monthly data table
Best months to visit: Mar, Apr, Aug, Sep, Oct

Sky & Air by Month

Cloud cover (%)
45
Jan
60
Feb
45
Mar
69
Apr
74
May
59
Jun
58
Jul
51
Aug
60
Sep
44
Oct
52
Nov
66
Dec
Humidity (%)
57
Jan
57
Feb
48
Mar
55
Apr
66
May
70
Jun
70
Jul
64
Aug
64
Sep
62
Oct
58
Nov
60
Dec

Weather Days by Month

↓ Weather days table

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Nearby Cities

Nearby

Commercial airport 6 mi Hagerstown Regional Richard A Henson Field (HGR)
Ski resort 12 mi Whitetail Resort
National park 16 mi Appalachian National Scenic Trail
Mountain peak (4,928 ft) 296 mi Third Peak
Hospital 9 mi Western Maryland Hospital Center
Hiking trail 13 mi Deer Lick Shelter Trail

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Monthly Weather Data

↑ See chart
Month Avg High Avg Low Rainfall Snowfall Sunny Days
January 35°F 2°C 22°F -6°C 0.4 in 11 mm 11.0 in279 mm 15
February 42°F 6°C 29°F -2°C 1.6 in 42 mm 7.2 in183 mm 9
March 61°F 16°C 39°F 4°C 2.2 in 56 mm 13
April 68°F 20°C 48°F 9°C 2.8 in 71 mm 5
May 73°F 23°C 56°F 13°C 7.7 in 196 mm 3
June 84°F 29°C 65°F 18°C 4.2 in 106 mm 9
July 89°F 32°C 71°F 22°C 4.3 in 109 mm 7
August 82°F 28°C 63°F 17°C 1.7 in 44 mm 13
September 80°F 26°C 60°F 15°C 1.7 in 42 mm 9
October 67°F 19°C 47°F 8°C 2.2 in 56 mm 15
November 55°F 13°C 38°F 3°C 1.5 in 39 mm 0.3 in7 mm 13
December 40°F 5°C 27°F -3°C 1.7 in 43 mm 6.4 in162 mm 5

Weather Days by Month

↑ See chart
Month Sunny Days Storm Days
January 15 0
February 9 1
March 13 2
April 5 2
May 3 9
June 9 5
July 7 7
August 13 3
September 9 2
October 15 1
November 13 0
December 5 1