Hourly Weather Forecast - Mercersburg, PA

12 AM
40°F
10%
1mph
SW
Partly Cloudy
Humidity
85%
Feels like
40°F
Dew Point
36°F
1 AM
39°F
20%
1mph
WSW
Mostly Cloudy
Humidity
86%
Feels like
39°F
Dew Point
36°F
2 AM
39°F
10%
1mph
W
Mostly Cloudy
Humidity
89%
Feels like
39°F
Dew Point
36°F
3 AM
39°F
10%
1mph
W
Mostly Cloudy
Humidity
90%
Feels like
39°F
Dew Point
36°F
4 AM
39°F
10%
2mph
W
Mostly Cloudy
Humidity
89%
Feels like
39°F
Dew Point
36°F
5 AM
38°F
10%
2mph
W
Mostly Cloudy
Humidity
89%
Feels like
38°F
Dew Point
35°F
6 AM
37°F
10%
2mph
W
Partly Cloudy
Humidity
90%
Feels like
37°F
Dew Point
35°F
7 AM
37°F
10%
2mph
WNW
Partly Cloudy
Humidity
91%
Feels like
37°F
Dew Point
34°F
7:15 AM
8 AM
38°F
10%
2mph
WNW
Partly Cloudy
Humidity
88%
Feels like
38°F
Dew Point
34°F
9 AM
40°F
10%
2mph
W
Partly Cloudy
Humidity
80%
Feels like
40°F
Dew Point
35°F
10 AM
44°F
10%
2mph
W
Partly Cloudy
Humidity
72%
Feels like
44°F
Dew Point
36°F
11 AM
47°F
10%
3mph
WSW
Partly Cloudy
Humidity
66%
Feels like
47°F
Dew Point
36°F
12 PM
50°F
10%
3mph
WSW
Partly Cloudy
Humidity
61%
Feels like
49°F
Dew Point
37°F
1 PM
52°F
10%
4mph
SW
Mostly Cloudy
Humidity
56%
Feels like
52°F
Dew Point
37°F
2 PM
53°F
10%
4mph
SW
Cloudy
Humidity
52%
Feels like
53°F
Dew Point
37°F
3 PM
55°F
30%
4mph
SW
30% Chance of Light Rain
Humidity
48%
Feels like
55°F
Dew Point
36°F
4 PM
56°F
30%
4mph
SW
30% Chance of Light Rain
Humidity
45%
Feels like
56°F
Dew Point
35°F
5 PM
55°F
30%
4mph
SW
30% Chance Rain Showers
Humidity
44%
Feels like
55°F
Dew Point
34°F
6 PM
54°F
20%
4mph
SW
Partly Cloudy
Humidity
46%
Feels like
54°F
Dew Point
33°F
7 PM
51°F
30%
3mph
SSW
30% Chance Rain Showers
Humidity
49%
Feels like
51°F
Dew Point
33°F
7:23 PM
8 PM
49°F
30%
3mph
SSW
30% Chance Rain Showers
Humidity
53%
Feels like
49°F
Dew Point
33°F
9 PM
48°F
30%
2mph
SSW
30% Chance Rain Showers
Humidity
56%
Feels like
48°F
Dew Point
33°F
10 PM
47°F
30%
2mph
WSW
30% Chance of Light Rain
Humidity
58%
Feels like
47°F
Dew Point
33°F
11 PM
46°F
30%
2mph
W
30% Chance of Light Rain
Humidity
59%
Feels like
46°F
Dew Point
33°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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