Hourly Weather Forecast - Mercersburg, PA

12 AM
48°F
50%
0mph
SSE
50% Chance of Light Rain
Humidity
90%
Feels like
48°F
Dew Point
45°F
1 AM
48°F
60%
0mph
SSE
60% Chance of Light Rain
Humidity
90%
Feels like
48°F
Dew Point
45°F
2 AM
48°F
50%
0mph
SSE
50% Chance of Light Rain
Humidity
90%
Feels like
48°F
Dew Point
45°F
3 AM
47°F
50%
1mph
SSE
50% Chance of Light Rain
Humidity
91%
Feels like
47°F
Dew Point
45°F
4 AM
47°F
50%
1mph
SSE
50% Chance of Light Rain
Humidity
91%
Feels like
47°F
Dew Point
45°F
5 AM
47°F
40%
0mph
S
40% Chance of Light Rain
Humidity
93%
Feels like
47°F
Dew Point
45°F
6 AM
47°F
40%
0mph
S
40% Chance of Light Rain
Humidity
94%
Feels like
47°F
Dew Point
45°F
6:39 AM
7 AM
47°F
30%
0mph
S
30% Chance of Light Rain
Humidity
96%
Feels like
47°F
Dew Point
46°F
8 AM
49°F
20%
0mph
S
Cloudy
Humidity
95%
Feels like
49°F
Dew Point
47°F
9 AM
51°F
10%
0mph
S
Cloudy
Humidity
93%
Feels like
51°F
Dew Point
49°F
10 AM
53°F
30%
1mph
SSE
30% Chance of Light Rain
Humidity
92%
Feels like
53°F
Dew Point
51°F
11 AM
56°F
30%
1mph
S
30% Chance of Light Rain
Humidity
88%
Feels like
56°F
Dew Point
52°F
12 PM
58°F
30%
2mph
S
30% Chance of Light Rain
Humidity
84%
Feels like
58°F
Dew Point
54°F
1 PM
60°F
30%
2mph
S
30% Chance of Light Rain
Humidity
81%
Feels like
60°F
Dew Point
55°F
2 PM
62°F
30%
2mph
SSE
30% Chance of Light Rain
Humidity
77%
Feels like
62°F
Dew Point
55°F
3 PM
64°F
40%
2mph
SSE
40% Chance of Light Rain
Humidity
75%
Feels like
64°F
Dew Point
55°F
4 PM
64°F
40%
2mph
SSE
40% Chance of Light Rain
Humidity
74%
Feels like
64°F
Dew Point
55°F
5 PM
62°F
50%
2mph
SE
50% Chance of Light Rain
Humidity
76%
Feels like
62°F
Dew Point
55°F
6 PM
60°F
50%
2mph
SE
50% Chance of Light Rain
Humidity
80%
Feels like
60°F
Dew Point
54°F
6:07 PM
7 PM
58°F
50%
2mph
SE
50% Chance of Light Rain
Humidity
83%
Feels like
58°F
Dew Point
53°F
8 PM
57°F
40%
2mph
SE
40% Chance of Light Rain
Humidity
84%
Feels like
57°F
Dew Point
52°F
9 PM
56°F
40%
1mph
SSE
40% Chance of Light Rain
Humidity
83%
Feels like
56°F
Dew Point
51°F
10 PM
56°F
40%
1mph
SSE
40% Chance of Rain
Humidity
83%
Feels like
56°F
Dew Point
51°F
11 PM
55°F
40%
1mph
S
40% Chance of Light Rain
Humidity
83%
Feels like
55°F
Dew Point
50°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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