Hourly Weather Forecast - Grantham, PA

12 AM
21°F
10%
3mph
WSW
Mostly Cloudy
Humidity
67%
Feels like
17°F
Dew Point
12°F
1 AM
21°F
10%
3mph
WSW
Mostly Cloudy
Humidity
69%
Feels like
21°F
Dew Point
12°F
2 AM
20°F
10%
3mph
WSW
Partly Cloudy
Humidity
69%
Feels like
20°F
Dew Point
12°F
3 AM
20°F
10%
3mph
WSW
Mostly Cloudy
Humidity
69%
Feels like
20°F
Dew Point
11°F
4 AM
20°F
10%
2mph
WSW
Cloudy
Humidity
70%
Feels like
20°F
Dew Point
11°F
5 AM
20°F
10%
2mph
WSW
Cloudy
Humidity
70%
Feels like
20°F
Dew Point
12°F
6 AM
19°F
10%
3mph
W
Cloudy
Humidity
73%
Feels like
19°F
Dew Point
12°F
7 AM
19°F
10%
3mph
W
Mostly Cloudy
Humidity
72%
Feels like
19°F
Dew Point
12°F
7:23 AM
8 AM
20°F
10%
3mph
W
Mostly Cloudy
Humidity
71%
Feels like
15°F
Dew Point
12°F
9 AM
23°F
10%
5mph
W
Partly Cloudy
Humidity
62%
Feels like
17°F
Dew Point
12°F
10 AM
25°F
10%
6mph
WNW
Partly Cloudy
Humidity
55%
Feels like
18°F
Dew Point
11°F
11 AM
28°F
10%
7mph
WNW
Partly Cloudy
Humidity
51%
Feels like
20°F
Dew Point
12°F

Snow and ice forecast through Friday A.M.

Multiple Snow Threats Across the Northern U.S.

Multiple systems will bring snow across the Northern U.S. through the end of the week.

Rainfall Forecast for Northwest through Friday A.M.

Unrelenting Rains Soak the Northwest

Thursday's Weather Outlook

Thursday's Weather Outlook

Weekly Drought Map for December 4, 2025

Active Week of Weather Leads to Mixed Drought Results

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

Cold Air Damming - Cause And Effects

People skating on a frozen pond on a clear day. (Image by Q K from Pixabay)

Safety Tips For Icy Surfaces

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide