Hourly Weather Forecast - Mercersburg, PA

10 AM
62°F
70%
10mph
S
70% Chance of Light Rain
Humidity
92%
Feels like
62°F
Dew Point
60°F
11 AM
64°F
70%
11mph
S
70% Chance of Light Rain
Humidity
90%
Feels like
64°F
Dew Point
61°F
12 PM
65°F
70%
12mph
S
70% Chance of Light Rain
Humidity
88%
Feels like
65°F
Dew Point
61°F
1 PM
66°F
40%
13mph
S
40% Chance of Light Rain
Humidity
85%
Feels like
66°F
Dew Point
61°F
2 PM
66°F
80%
13mph
S
80% Chance of Rain
Humidity
84%
Feels like
66°F
Dew Point
61°F
3 PM
64°F
80%
12mph
S
80% Chance of Light Rain
Humidity
82%
Feels like
64°F
Dew Point
59°F
4 PM
61°F
70%
9mph
SSW
70% Chance of Light Rain
Humidity
80%
Feels like
61°F
Dew Point
55°F
5 PM
57°F
100%
7mph
SW
Rain
Humidity
77%
Feels like
57°F
Dew Point
50°F
6 PM
52°F
90%
9mph
WSW
Rain
Humidity
77%
Feels like
52°F
Dew Point
46°F
7 PM
46°F
90%
10mph
W
Rain
Humidity
79%
Feels like
42°F
Dew Point
40°F
7:19 PM
8 PM
42°F
100%
11mph
WNW
Rain
Humidity
78%
Feels like
36°F
Dew Point
36°F
9 PM
39°F
90%
10mph
WNW
Frozen Mix
Humidity
76%
Feels like
32°F
Dew Point
32°F
10 PM
37°F
70%
10mph
W
70% Chance Frozen Mix
Humidity
72%
Feels like
30°F
Dew Point
29°F
11 PM
35°F
30%
9mph
W
30 % Chance of Heavy Snow
Humidity
68%
Feels like
28°F
Dew Point
26°F

Today's Severe Weather Outlook

Dangerous Storms Take Aim At The Eastern U.S.

After more than 400 reports of severe weather on Sunday, a greater risk of dangerous thunderstorms exists today.

Snow and Ice Forecast Through Tuesday Evening

Snow, High Winds Plague Great Lakes With Blizzard Conditions

Today's Weather Outlook

Today's Weather Outlook

A tree knocked over after a storm produced high winds. (provided by PublicDomainPictures via Pixabay.com)

Strong Winds in the Springtime

Weekly Drought Map for March 12, 2026

Widespread Drought Improvement For The South, Midwest

Blizzard: Its True Definition

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