Hourly Weather Forecast - South Mountain, PA

12 AM
26°F
10%
5mph
S
Mostly Cloudy
Humidity
66%
Feels like
19°F
Dew Point
16°F
1 AM
26°F
10%
6mph
S
Mostly Cloudy
Humidity
65%
Feels like
19°F
Dew Point
16°F
2 AM
26°F
10%
6mph
S
Mostly Cloudy
Humidity
65%
Feels like
20°F
Dew Point
16°F
3 AM
26°F
10%
6mph
S
Cloudy
Humidity
65%
Feels like
20°F
Dew Point
17°F
4 AM
27°F
20%
6mph
S
Cloudy
Humidity
66%
Feels like
20°F
Dew Point
17°F
5 AM
27°F
20%
6mph
S
Cloudy
Humidity
67%
Feels like
20°F
Dew Point
17°F
6 AM
26°F
30%
6mph
S
30% Chance of Flurries
Humidity
68%
Feels like
19°F
Dew Point
17°F
7 AM
27°F
30%
6mph
S
30% Chance of Flurries
Humidity
69%
Feels like
19°F
Dew Point
18°F
7:28 AM
8 AM
28°F
30%
6mph
S
30% Chance of Flurries
Humidity
68%
Feels like
21°F
Dew Point
19°F
9 AM
29°F
30%
6mph
S
30% Chance of Flurries
Humidity
67%
Feels like
23°F
Dew Point
20°F

Rainfall and Snowfall Totals Through Thursday

Pineapple Express Slams Northwestern U.S.

The atmospheric river this week will keep buffeting the Pacific Northwest with heavy rain, snow, and high winds.

Wednesday's Weather Outlook

Today's 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 person standing in a snowy forest with their back to the camera. They are bundled up in a white hat and a brown jacket. (Image by StockSnap from Pixabay)

Common Cold Weather Illnesses

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

Cold Air Damming - Cause And Effects

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