Hourly Weather Forecast - Mercersburg, PA

12 AM
37°F
0%
6mph
NNW
Mostly Clear
Humidity
50%
Feels like
33°F
Dew Point
20°F
1 AM
36°F
0%
5mph
NNW
Mostly Clear
Humidity
51%
Feels like
32°F
Dew Point
19°F
2 AM
35°F
0%
4mph
NNW
Clear
Humidity
52%
Feels like
31°F
Dew Point
19°F
3 AM
33°F
0%
4mph
NNW
Clear
Humidity
54%
Feels like
30°F
Dew Point
19°F
4 AM
32°F
0%
3mph
NW
Clear
Humidity
55%
Feels like
29°F
Dew Point
18°F
5 AM
32°F
0%
3mph
NW
Clear
Humidity
57%
Feels like
29°F
Dew Point
18°F
6 AM
31°F
0%
3mph
NW
Clear
Humidity
59%
Feels like
31°F
Dew Point
19°F
7 AM
31°F
0%
3mph
NW
Clear
Humidity
61%
Feels like
31°F
Dew Point
19°F
7:09 AM
8 AM
32°F
0%
2mph
NW
Sunny
Humidity
60%
Feels like
32°F
Dew Point
20°F
9 AM
34°F
0%
2mph
NW
Mostly Sunny
Humidity
56%
Feels like
34°F
Dew Point
20°F
10 AM
37°F
0%
2mph
NW
Mostly Sunny
Humidity
49%
Feels like
37°F
Dew Point
20°F
11 AM
40°F
0%
2mph
NW
Partly Cloudy
Humidity
44%
Feels like
40°F
Dew Point
20°F
12 PM
43°F
0%
1mph
WSW
Partly Cloudy
Humidity
40%
Feels like
43°F
Dew Point
20°F
1 PM
45°F
0%
2mph
SSW
Partly Cloudy
Humidity
37%
Feels like
45°F
Dew Point
20°F
2 PM
47°F
0%
4mph
SSW
Partly Cloudy
Humidity
35%
Feels like
46°F
Dew Point
21°F
3 PM
49°F
0%
5mph
S
Partly Cloudy
Humidity
34%
Feels like
47°F
Dew Point
22°F
4 PM
50°F
0%
5mph
S
Partly Cloudy
Humidity
33%
Feels like
48°F
Dew Point
22°F
5 PM
50°F
0%
5mph
S
Partly Cloudy
Humidity
34%
Feels like
48°F
Dew Point
22°F
6 PM
48°F
0%
5mph
S
Partly Cloudy
Humidity
37%
Feels like
46°F
Dew Point
23°F
7 PM
46°F
0%
4mph
SSE
Mostly Cloudy
Humidity
40%
Feels like
44°F
Dew Point
23°F
7:27 PM
8 PM
44°F
0%
3mph
SSE
Cloudy
Humidity
44%
Feels like
42°F
Dew Point
23°F
9 PM
42°F
0%
2mph
SSE
Cloudy
Humidity
48%
Feels like
42°F
Dew Point
24°F
10 PM
41°F
0%
2mph
S
Cloudy
Humidity
50%
Feels like
41°F
Dew Point
24°F
11 PM
40°F
0%
2mph
S
Mostly Cloudy
Humidity
52%
Feels like
40°F
Dew Point
24°F

Today'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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