Hourly Weather Forecast - Greencastle, PA

12 AM
26°F
0%
5mph
S
Clear
Humidity
68%
Feels like
20°F
Dew Point
17°F
1 AM
26°F
0%
5mph
S
Clear
Humidity
69%
Feels like
19°F
Dew Point
17°F
2 AM
25°F
0%
5mph
S
Mostly Clear
Humidity
71%
Feels like
19°F
Dew Point
17°F
3 AM
26°F
0%
5mph
S
Partly Cloudy
Humidity
71%
Feels like
19°F
Dew Point
18°F
4 AM
26°F
0%
6mph
S
Mostly Cloudy
Humidity
73%
Feels like
19°F
Dew Point
19°F
5 AM
27°F
0%
6mph
S
Mostly Cloudy
Humidity
74%
Feels like
20°F
Dew Point
20°F
6 AM
28°F
0%
6mph
SSW
Partly Cloudy
Humidity
75%
Feels like
21°F
Dew Point
21°F
7 AM
30°F
0%
6mph
SSW
Cloudy
Humidity
75%
Feels like
23°F
Dew Point
23°F
7:26 AM
8 AM
32°F
0%
7mph
SSW
Cloudy
Humidity
73%
Feels like
26°F
Dew Point
25°F
9 AM
35°F
0%
7mph
SSW
Cloudy
Humidity
70%
Feels like
29°F
Dew Point
26°F
10 AM
38°F
0%
8mph
SW
Cloudy
Humidity
65%
Feels like
32°F
Dew Point
28°F
11 AM
41°F
0%
9mph
SW
Cloudy
Humidity
61%
Feels like
36°F
Dew Point
29°F
12 PM
44°F
0%
11mph
WSW
Cloudy
Humidity
57%
Feels like
38°F
Dew Point
30°F
1 PM
46°F
10%
11mph
WSW
Cloudy
Humidity
55%
Feels like
41°F
Dew Point
31°F
2 PM
47°F
10%
11mph
WSW
Cloudy
Humidity
56%
Feels like
42°F
Dew Point
32°F
3 PM
46°F
10%
11mph
W
Cloudy
Humidity
59%
Feels like
41°F
Dew Point
32°F
4 PM
44°F
10%
11mph
W
Cloudy
Humidity
64%
Feels like
38°F
Dew Point
33°F
4:47 PM
5 PM
42°F
0%
10mph
W
Partly Cloudy
Humidity
69%
Feels like
36°F
Dew Point
32°F
6 PM
40°F
0%
9mph
W
Mostly Clear
Humidity
73%
Feels like
34°F
Dew Point
32°F
7 PM
38°F
0%
7mph
WNW
Mostly Clear
Humidity
74%
Feels like
32°F
Dew Point
30°F
8 PM
36°F
0%
6mph
WNW
Mostly Clear
Humidity
77%
Feels like
31°F
Dew Point
29°F
9 PM
35°F
0%
5mph
WNW
Partly Cloudy
Humidity
78%
Feels like
30°F
Dew Point
29°F
10 PM
34°F
0%
4mph
NW
Cloudy
Humidity
79%
Feels like
30°F
Dew Point
28°F
11 PM
33°F
0%
4mph
NW
Mostly Cloudy
Humidity
79%
Feels like
29°F
Dew Point
28°F

Wind chill temperatures Monday A.M.

Cold Weather Chills the Nation Down to the Gulf

In the path of a weak low-pressure system that brings snow to the Midwest and Northeast, extreme cold weather and brutally cold wind chill values will bring a bitter cold to much of the Nation.

Snowfall forecast through Sunday evening.

Snow Spreads Across the Ohio Valley into the Mid-Atlantic

Weekend Weather Outlook

Weekend Weather Outlook

How to Measure Snow via NWS

How To Measure Snow

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

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