Hourly Weather Forecast - Greencastle, PA

12 AM
20°F
0%
5mph
WSW
Mostly Cloudy
Humidity
70%
Feels like
13°F
Dew Point
12°F
1 AM
20°F
0%
5mph
WSW
Mostly Cloudy
Humidity
69%
Feels like
12°F
Dew Point
11°F
2 AM
19°F
0%
5mph
W
Partly Cloudy
Humidity
68%
Feels like
12°F
Dew Point
11°F
3 AM
19°F
0%
5mph
W
Mostly Clear
Humidity
68%
Feels like
12°F
Dew Point
10°F
4 AM
19°F
0%
5mph
W
Clear
Humidity
69%
Feels like
12°F
Dew Point
10°F
5 AM
19°F
0%
4mph
W
Clear
Humidity
70%
Feels like
12°F
Dew Point
10°F
6 AM
19°F
0%
4mph
W
Clear
Humidity
71%
Feels like
12°F
Dew Point
11°F
7 AM
20°F
0%
4mph
W
Clear
Humidity
70%
Feels like
14°F
Dew Point
11°F
7:25 AM
8 AM
22°F
0%
4mph
W
Sunny
Humidity
69%
Feels like
16°F
Dew Point
13°F
9 AM
25°F
0%
5mph
W
Sunny
Humidity
65%
Feels like
19°F
Dew Point
15°F
10 AM
28°F
0%
6mph
WSW
Sunny
Humidity
60%
Feels like
21°F
Dew Point
15°F
11 AM
30°F
0%
6mph
WSW
Mostly Sunny
Humidity
56%
Feels like
24°F
Dew Point
16°F
12 PM
32°F
0%
7mph
WSW
Partly Cloudy
Humidity
53%
Feels like
26°F
Dew Point
17°F
1 PM
34°F
0%
7mph
SW
Partly Cloudy
Humidity
51%
Feels like
28°F
Dew Point
18°F
2 PM
35°F
0%
7mph
SW
Partly Cloudy
Humidity
52%
Feels like
28°F
Dew Point
19°F
3 PM
34°F
0%
7mph
SSW
Partly Cloudy
Humidity
54%
Feels like
28°F
Dew Point
19°F
4 PM
33°F
0%
7mph
S
Partly Cloudy
Humidity
57%
Feels like
26°F
Dew Point
19°F
4:47 PM
5 PM
31°F
0%
7mph
S
Partly Cloudy
Humidity
60%
Feels like
25°F
Dew Point
19°F
6 PM
30°F
0%
7mph
S
Partly Cloudy
Humidity
63%
Feels like
24°F
Dew Point
19°F
7 PM
29°F
0%
6mph
S
Partly Cloudy
Humidity
63%
Feels like
23°F
Dew Point
18°F
8 PM
28°F
0%
6mph
S
Mostly Clear
Humidity
64%
Feels like
22°F
Dew Point
18°F
9 PM
28°F
0%
6mph
S
Mostly Clear
Humidity
65%
Feels like
21°F
Dew Point
18°F
10 PM
27°F
0%
6mph
S
Clear
Humidity
66%
Feels like
21°F
Dew Point
18°F
11 PM
27°F
0%
6mph
S
Clear
Humidity
67%
Feels like
20°F
Dew Point
17°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

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide