Hourly Weather Forecast - Mercersburg, PA

12 AM
50°F
0%
2mph
SSE
Mostly Clear
Humidity
70%
Feels like
50°F
Dew Point
41°F
1 AM
49°F
0%
3mph
SSE
Mostly Clear
Humidity
72%
Feels like
48°F
Dew Point
40°F
2 AM
48°F
0%
4mph
SSE
Partly Cloudy
Humidity
74%
Feels like
47°F
Dew Point
40°F
3 AM
47°F
0%
4mph
S
Partly Cloudy
Humidity
78%
Feels like
46°F
Dew Point
41°F
4 AM
46°F
0%
3mph
S
Partly Cloudy
Humidity
81%
Feels like
45°F
Dew Point
41°F
5 AM
46°F
0%
3mph
S
Partly Cloudy
Humidity
83%
Feels like
46°F
Dew Point
41°F
6 AM
46°F
0%
2mph
SSW
Partly Cloudy
Humidity
88%
Feels like
46°F
Dew Point
42°F
7 AM
46°F
10%
2mph
SSW
Partly Cloudy
Humidity
92%
Feels like
46°F
Dew Point
43°F
7:12 AM
8 AM
47°F
10%
2mph
SSW
Partly Cloudy
Humidity
91%
Feels like
47°F
Dew Point
45°F
9 AM
52°F
10%
3mph
SSW
Partly Cloudy
Humidity
82%
Feels like
52°F
Dew Point
46°F
10 AM
57°F
10%
4mph
SSW
Partly Cloudy
Humidity
71%
Feels like
57°F
Dew Point
48°F
11 AM
63°F
0%
5mph
SSW
Mostly Sunny
Humidity
62%
Feels like
63°F
Dew Point
50°F
12 PM
68°F
0%
6mph
SW
Mostly Sunny
Humidity
56%
Feels like
68°F
Dew Point
52°F
1 PM
73°F
0%
7mph
SW
Mostly Sunny
Humidity
50%
Feels like
73°F
Dew Point
53°F
2 PM
77°F
10%
8mph
SW
Partly Cloudy
Humidity
47%
Feels like
77°F
Dew Point
55°F
3 PM
79°F
10%
9mph
SW
Partly Cloudy
Humidity
44%
Feels like
79°F
Dew Point
55°F
4 PM
80°F
10%
9mph
SW
Mostly Sunny
Humidity
43%
Feels like
80°F
Dew Point
55°F
5 PM
79°F
10%
8mph
SW
Mostly Sunny
Humidity
42%
Feels like
79°F
Dew Point
54°F
6 PM
77°F
10%
7mph
WSW
Partly Cloudy
Humidity
45%
Feels like
77°F
Dew Point
54°F
7 PM
73°F
20%
5mph
WNW
Mostly Cloudy
Humidity
49%
Feels like
73°F
Dew Point
53°F
7:25 PM
8 PM
70°F
30%
4mph
WNW
30% Chance of Light Rain
Humidity
55%
Feels like
70°F
Dew Point
53°F
9 PM
68°F
30%
4mph
NW
30% Chance of Light Rain
Humidity
60%
Feels like
68°F
Dew Point
53°F
10 PM
66°F
30%
4mph
NNW
30% Chance Rain Showers
Humidity
65%
Feels like
66°F
Dew Point
54°F
11 PM
64°F
40%
4mph
N
40% Chance Rain Showers
Humidity
70%
Feels like
64°F
Dew Point
54°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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