Hourly Weather Forecast - Harmonsburg, PA

12 AM
17°F
10%
10mph
SW
Cloudy
Humidity
73%
Feels like
5°F
Dew Point
10°F
1 AM
17°F
20%
10mph
SW
Cloudy
Humidity
73%
Feels like
5°F
Dew Point
10°F
2 AM
17°F
30%
10mph
SW
30% Chance of Flurries
Humidity
73%
Feels like
5°F
Dew Point
10°F
3 AM
17°F
40%
10mph
SW
40% Chance of Flurries
Humidity
73%
Feels like
5°F
Dew Point
10°F
4 AM
17°F
40%
10mph
WSW
40% Chance of Flurries
Humidity
74%
Feels like
5°F
Dew Point
10°F
5 AM
17°F
40%
10mph
WSW
40% Chance of Flurries
Humidity
76%
Feels like
5°F
Dew Point
11°F
6 AM
17°F
40%
9mph
SW
40% Chance Frozen Mix
Humidity
80%
Feels like
5°F
Dew Point
11°F
7 AM
17°F
30%
9mph
SW
30% Chance Frozen Mix
Humidity
81%
Feels like
6°F
Dew Point
12°F
7:41 AM
8 AM
19°F
20%
9mph
SW
Partly Cloudy
Humidity
81%
Feels like
8°F
Dew Point
13°F
9 AM
21°F
20%
9mph
SW
Partly Cloudy
Humidity
78%
Feels like
11°F
Dew Point
15°F
10 AM
23°F
20%
8mph
SW
Partly Cloudy
Humidity
76%
Feels like
13°F
Dew Point
16°F
11 AM
24°F
20%
8mph
SW
Partly Cloudy
Humidity
76%
Feels like
15°F
Dew Point
18°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