Hourly Weather Forecast - Mercersburg, PA

8 AM
27°F
0%
2mph
ENE
Partly Cloudy
Humidity
64%
Feels like
27°F
Dew Point
16°F
9 AM
28°F
10%
2mph
ENE
Mostly Cloudy
Humidity
61%
Feels like
28°F
Dew Point
17°F
10 AM
30°F
10%
3mph
E
Cloudy
Humidity
59%
Feels like
30°F
Dew Point
17°F
11 AM
31°F
10%
3mph
ESE
Cloudy
Humidity
59%
Feels like
31°F
Dew Point
18°F
12 PM
31°F
20%
3mph
SE
Cloudy
Humidity
60%
Feels like
28°F
Dew Point
19°F
1 PM
31°F
30%
4mph
SSE
30% Chance Freezing Rain
Humidity
62%
Feels like
28°F
Dew Point
20°F
2 PM
32°F
30%
4mph
SSE
30% Chance of Light Rain
Humidity
65%
Feels like
29°F
Dew Point
22°F
3 PM
33°F
30%
4mph
SSE
30% Chance of Snow
Humidity
68%
Feels like
29°F
Dew Point
23°F
4 PM
33°F
30%
4mph
SSE
30% Chance of Light Rain
Humidity
71%
Feels like
29°F
Dew Point
24°F
5 PM
33°F
10%
4mph
SSE
Mostly Cloudy
Humidity
73%
Feels like
29°F
Dew Point
25°F
6 PM
32°F
10%
4mph
SSE
Mostly Cloudy
Humidity
76%
Feels like
29°F
Dew Point
26°F
6:04 PM
7 PM
32°F
10%
4mph
SSE
Mostly Cloudy
Humidity
77%
Feels like
28°F
Dew Point
25°F
8 PM
32°F
0%
4mph
SSE
Mostly Cloudy
Humidity
76%
Feels like
28°F
Dew Point
25°F
9 PM
31°F
0%
4mph
SSE
Mostly Cloudy
Humidity
77%
Feels like
27°F
Dew Point
25°F
10 PM
31°F
10%
4mph
SSE
Cloudy
Humidity
77%
Feels like
27°F
Dew Point
25°F
11 PM
31°F
10%
4mph
SSE
Cloudy
Humidity
79%
Feels like
27°F
Dew Point
25°F

Snow and Ice Accumulations through Tuesday

Wintry Disturbance Hits Northeastern U.S.

A wintry disturbance will continue northeastward, buffeting the northeastern U.S. with light snow, freezing rain, and plain rain through Tuesday night.

Today's Weather Outlook

Today's Weather Outlook

Weekly Drought Map for February 26, 2026

Widespread Drought Degradation For South, Southeast; Mixed Results Elsewhere

Debris flies through the air as howling winds accompanied by a line of storms approach the old Tarrant County Courthouse in downtown Fort Worth, Texas, on March 2, 2023. (Tom Fox/The Dallas Morning News via AP)

Lightning Season Rapidly Approaching: Best Safety Practices

Rocky Mountain National Park at day in December. (NPS Natural Resources/Wikimedia Commons)

Snowmelt and Flooding

U.S. Route 52 near St. Donatus between Bellevue and Dubuque, Iowa. (Tony Webster from Portland, Oregon)

Winter Weather Driving Safety Tips

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