Hourly Weather Forecast - Mercersburg, PA

12 AM
38°F
0%
2mph
S
Mostly Cloudy
Humidity
56%
Feels like
38°F
Dew Point
24°F
1 AM
37°F
0%
3mph
S
Mostly Cloudy
Humidity
59%
Feels like
37°F
Dew Point
24°F
2 AM
37°F
0%
3mph
S
Mostly Cloudy
Humidity
62%
Feels like
37°F
Dew Point
25°F
3 AM
36°F
0%
3mph
S
Mostly Cloudy
Humidity
65%
Feels like
36°F
Dew Point
25°F
4 AM
36°F
0%
2mph
S
Cloudy
Humidity
67%
Feels like
36°F
Dew Point
26°F
5 AM
36°F
0%
2mph
S
Cloudy
Humidity
69%
Feels like
36°F
Dew Point
26°F
6 AM
35°F
0%
2mph
S
Cloudy
Humidity
72%
Feels like
35°F
Dew Point
27°F
7 AM
35°F
0%
2mph
S
Cloudy
Humidity
75%
Feels like
35°F
Dew Point
28°F
7:07 AM
8 AM
36°F
0%
2mph
S
Cloudy
Humidity
73%
Feels like
36°F
Dew Point
29°F
9 AM
40°F
0%
3mph
S
Mostly Cloudy
Humidity
67%
Feels like
40°F
Dew Point
30°F
10 AM
44°F
0%
4mph
S
Mostly Cloudy
Humidity
58%
Feels like
43°F
Dew Point
31°F
11 AM
48°F
0%
4mph
S
Mostly Cloudy
Humidity
51%
Feels like
47°F
Dew Point
31°F
12 PM
52°F
0%
5mph
S
Mostly Cloudy
Humidity
46%
Feels like
52°F
Dew Point
32°F
1 PM
55°F
10%
6mph
S
Mostly Cloudy
Humidity
42%
Feels like
55°F
Dew Point
32°F
2 PM
57°F
10%
7mph
S
Mostly Cloudy
Humidity
40%
Feels like
57°F
Dew Point
33°F
3 PM
59°F
10%
7mph
S
Cloudy
Humidity
39%
Feels like
59°F
Dew Point
34°F
4 PM
60°F
10%
6mph
S
Cloudy
Humidity
39%
Feels like
60°F
Dew Point
34°F
5 PM
59°F
10%
5mph
S
Cloudy
Humidity
40%
Feels like
59°F
Dew Point
35°F
6 PM
57°F
20%
4mph
SSW
Cloudy
Humidity
44%
Feels like
57°F
Dew Point
35°F
7 PM
54°F
20%
3mph
SSW
Cloudy
Humidity
49%
Feels like
54°F
Dew Point
36°F
7:28 PM
8 PM
52°F
10%
3mph
SW
Cloudy
Humidity
54%
Feels like
52°F
Dew Point
36°F
9 PM
50°F
10%
3mph
SW
Cloudy
Humidity
58%
Feels like
50°F
Dew Point
36°F
10 PM
49°F
10%
2mph
SSW
Cloudy
Humidity
61%
Feels like
49°F
Dew Point
36°F
11 PM
48°F
10%
2mph
SSW
Cloudy
Humidity
63%
Feels like
48°F
Dew Point
36°F

Sunday's High Temperature Outlook

Early Spring Heat Wave Zaps Southwest

Much of the Southwest will observe record-breaking heat through the weekend, with high temperatures reminiscent of mid-summer!

Weekend Weather Outlook

Weekend Weather Outlook

Weekly Drought Map for March 19, 2026

Active Weather, Drought Improvements for Eastern Half; Drying Persists Elsewhere

(Image provided by Pixabay.com)

Lightning Safety

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

Strong Winds in the Springtime

Story image: WeatherBug user Pat S. captures a plant blooming in Columbia, Md., on February 24, 2017.

When Does Spring Begin?

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