Hourly Weather Forecast - Mercersburg, PA

7:29 AM
8 AM
57°F
70%
1mph
S
70% Chance Rain Showers
Humidity
95%
Feels like
57°F
Dew Point
55°F
9 AM
59°F
70%
2mph
S
70% Chance Rain Showers
Humidity
95%
Feels like
59°F
Dew Point
58°F
10 AM
63°F
20%
2mph
S
Partly Cloudy
Humidity
88%
Feels like
63°F
Dew Point
60°F
11 AM
66°F
30%
3mph
S
30% Chance Rain Showers
Humidity
84%
Feels like
66°F
Dew Point
61°F
12 PM
69°F
30%
4mph
S
30% Chance Rain Showers
Humidity
81%
Feels like
69°F
Dew Point
62°F
1 PM
71°F
40%
4mph
SSW
40% Chance Rain Showers
Humidity
77%
Feels like
71°F
Dew Point
63°F
2 PM
72°F
50%
5mph
SSW
50% Chance Rain Showers
Humidity
73%
Feels like
72°F
Dew Point
63°F
3 PM
74°F
50%
6mph
SSW
50% Chance Rain Showers
Humidity
71%
Feels like
74°F
Dew Point
64°F
4 PM
75°F
30%
6mph
SSW
30% Chance Rain Showers
Humidity
68%
Feels like
75°F
Dew Point
64°F
5 PM
75°F
40%
6mph
SSW
40% Chance Rain Showers
Humidity
66%
Feels like
75°F
Dew Point
62°F
6 PM
73°F
30%
6mph
SSW
30% Chance Rain Showers
Humidity
68%
Feels like
73°F
Dew Point
62°F
7 PM
71°F
30%
6mph
SSW
30% Chance Rain Showers
Humidity
70%
Feels like
71°F
Dew Point
61°F
7:14 PM
8 PM
69°F
40%
6mph
SSW
40% Chance Rain Showers
Humidity
75%
Feels like
69°F
Dew Point
61°F
9 PM
68°F
30%
6mph
SSW
30% Chance Rain Showers
Humidity
76%
Feels like
68°F
Dew Point
60°F
10 PM
67°F
30%
6mph
SW
30% Chance Rain Showers
Humidity
79%
Feels like
67°F
Dew Point
60°F
11 PM
67°F
30%
5mph
SW
30% Chance Rain Showers
Humidity
79%
Feels like
67°F
Dew Point
60°F

Today's Severe Weather Outlook

Severe Storms Rally from Gulf Coast to Mid-Atlantic

Multiple rounds of severe storms will form today from the Gulf Coast to the Mid-Atlantic.

Today's Weather Outlook

Today's Weather Outlook

Weekly Drought Map for March 5, 2026

Drought Worsens Nationwide Despite Multiple Disturbances

A tornado on the ground in Hildreth, Neb., on June 14, 2014 (NOAA Photo Library/Ken Engquist).

Tornadoes and Road Safety -- Do's and Don't's

A pothole big enough to hold a traffic cone and garbage. (David Shankbone, Wikimedia Common)

Potholes: A Springtime Driving Menace

This John Deere riding mower continues to hum along. (Wikimedia Commons)

Spring Mower and Power Tool Seasonal Checklist

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Today's National Outlook

Hurricane Tracker

Allergy Forecast

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Outdoor Sports Guide