Hourly Weather Forecast - Mercersburg, PA

12 AM
43°F
50%
2mph
SSW
50% Chance of Light Rain
Humidity
88%
Feels like
43°F
Dew Point
40°F
1 AM
43°F
60%
1mph
SW
60% Chance of Light Rain
Humidity
88%
Feels like
43°F
Dew Point
40°F
2 AM
43°F
70%
1mph
SW
70% Chance of Light Rain
Humidity
89%
Feels like
43°F
Dew Point
40°F
3 AM
43°F
70%
1mph
WSW
70% Chance of Light Rain
Humidity
90%
Feels like
43°F
Dew Point
40°F
4 AM
43°F
70%
1mph
WNW
70% Chance of Light Rain
Humidity
90%
Feels like
43°F
Dew Point
40°F
5 AM
43°F
60%
1mph
NW
60% Chance of Light Rain
Humidity
92%
Feels like
43°F
Dew Point
40°F
6 AM
42°F
40%
0mph
NNW
40% Chance of Light Rain
Humidity
95%
Feels like
42°F
Dew Point
41°F
6:40 AM
7 AM
43°F
40%
0mph
N
40% Chance of Light Rain
Humidity
97%
Feels like
43°F
Dew Point
42°F
8 AM
44°F
30%
0mph
NNE
30% Chance of Light Rain
Humidity
97%
Feels like
44°F
Dew Point
44°F
9 AM
46°F
20%
1mph
NNE
Cloudy
Humidity
97%
Feels like
46°F
Dew Point
45°F
10 AM
48°F
20%
1mph
NNE
Cloudy
Humidity
96%
Feels like
48°F
Dew Point
47°F
11 AM
50°F
20%
1mph
NNE
Cloudy
Humidity
95%
Feels like
50°F
Dew Point
48°F
12 PM
51°F
20%
1mph
NE
Cloudy
Humidity
93%
Feels like
51°F
Dew Point
49°F
1 PM
52°F
30%
1mph
NE
30% Chance of Light Rain
Humidity
91%
Feels like
52°F
Dew Point
50°F
2 PM
53°F
30%
1mph
ENE
30% Chance of Light Rain
Humidity
89%
Feels like
53°F
Dew Point
50°F
3 PM
54°F
40%
1mph
ESE
40% Chance of Light Rain
Humidity
88%
Feels like
54°F
Dew Point
50°F
4 PM
54°F
50%
1mph
SE
50% Chance of Light Rain
Humidity
87%
Feels like
54°F
Dew Point
50°F
5 PM
53°F
60%
0mph
SE
60% Chance of Light Rain
Humidity
88%
Feels like
53°F
Dew Point
49°F
6 PM
51°F
60%
0mph
SE
60% Chance of Light Rain
Humidity
89%
Feels like
51°F
Dew Point
48°F
6:06 PM
7 PM
50°F
50%
0mph
ESE
50% Chance of Light Rain
Humidity
90%
Feels like
50°F
Dew Point
47°F
8 PM
49°F
40%
0mph
ESE
40% Chance of Light Rain
Humidity
89%
Feels like
49°F
Dew Point
46°F
9 PM
49°F
30%
0mph
SE
30% Chance of Light Rain
Humidity
89%
Feels like
49°F
Dew Point
46°F
10 PM
48°F
30%
0mph
ESE
30% Chance of Light Rain
Humidity
89%
Feels like
48°F
Dew Point
45°F
11 PM
48°F
50%
0mph
SE
50% Chance of Light Rain
Humidity
90%
Feels like
48°F
Dew Point
45°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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