Currently: 94 °F. Sunny. (Weather station: Washington County Regional Airport, USA). See more current weatherPast Weather in Borough of Mercersburg — Graph
°F
Time
Wind
(mph)
(mph)
Temp
(°F)
(°F)
63
66
69
72
75
78
81
84
87
90
93
Thu, Jul 10
Lo:86
12 pm
Hi:86
5
Lo:77
6 pm
Hi:84
3
Fri, Jul 11
Lo:72
12 am
Hi:75
4
Lo:72
6 am
Hi:84
2
Lo:84
12 pm
Hi:90
4
Lo:81
6 pm
Hi:88
5
Sat, Jul 12
Lo:73
12 am
Hi:81
2
Lo:75
6 am
Hi:88
4
Lo:88
12 pm
Hi:91
5
Lo:77
6 pm
Hi:84
6
Sun, Jul 13
Lo:73
12 am
Hi:77
4
Lo:73
6 am
Hi:84
2
Lo:86
12 pm
Hi:91
7
Lo:77
6 pm
Hi:84
8
Mon, Jul 14
Lo:75
12 am
Hi:79
2
Lo:75
6 am
Hi:84
4
Lo:75
12 pm
Hi:88
8
Lo:73
6 pm
Hi:77
4
Tue, Jul 15
Lo:72
12 am
Hi:73
2
Lo:72
6 am
Hi:81
4
Lo:82
12 pm
Hi:88
4
Lo:79
6 pm
Hi:86
5
Wed, Jul 16
Lo:73
12 am
Hi:79
3
Lo:75
6 am
Hi:84
6
Lo:77
12 pm
Hi:90
6
Lo:73
6 pm
Hi:75
6
Thu, Jul 17
Lo:73
12 am
Hi:73
4
Lo:73
6 am
Hi:88
9
Lo:90
12 pm
Hi:93
11
Lo:81
6 pm
Hi:90
7
Fri, Jul 18
Lo:77
12 am
Hi:81
4
Lo:75
6 am
Hi:79
7
Lo:79
12 pm
Hi:82
2
Lo:75
6 pm
Hi:79
1
Sat, Jul 19
Lo:73
12 am
Hi:73
4
Lo:73
6 am
Hi:79
4
Lo:79
12 pm
Hi:84
6
Lo:73
6 pm
Hi:81
2
Sun, Jul 20
Lo:73
12 am
Hi:75
1
Lo:73
6 am
Hi:84
4
Lo:79
12 pm
Hi:90
11
Lo:79
6 pm
Hi:84
6
Mon, Jul 21
Lo:73
12 am
Hi:79
7
Lo:73
6 am
Hi:81
7
Lo:81
12 pm
Hi:84
9
Lo:72
6 pm
Hi:82
4
Tue, Jul 22
Lo:64
12 am
Hi:70
5
Lo:64
6 am
Hi:79
5
Lo:79
12 pm
Hi:84
6
Lo:73
6 pm
Hi:82
4
Wed, Jul 23
Lo:70
12 am
Hi:73
1
Lo:68
6 am
Hi:81
8
Lo:82
12 pm
Hi:88
9
Lo:77
6 pm
Hi:84
9
Thu, Jul 24
Lo:72
12 am
Hi:75
9
Lo:72
6 am
Hi:84
8
Lo:86
12 pm
Hi:90
11
Lo:79
6 pm
Hi:88
9
Fri, Jul 25
Lo:75
12 am
Hi:79
7
Lo:75
6 am
Hi:90
7
Lo:90
12 pm
Hi:93
10
Thursday, July 10, 2025, 12:00 pm — 6:00 pm
86 / 86 °F
Sunny.
Humidity: 53%
Barometer: 29.95 "Hg
WNW
Wind: 4.971 mph
Borough of Mercersburg Temperature Yesterday
Maximum temperature yesterday: 89 °F (at 2:53 pm)
Minimum temperature yesterday: 72 °F (at 5:53 am)
Average temperature yesterday: 81 °F
High & Low Weather Summary for the Past Weeks
| Temperature | Humidity | Pressure | |
|---|---|---|---|
| High | 93 °F (Jul 17, 4:53 pm) | 100% (Jul 20, 7:07 am) | 30.25 "Hg (Jul 20, 7:07 am) |
| Low | 65 °F (Jul 22, 4:53 am) | 43% (Jul 21, 5:53 pm) | 29.84 "Hg (Jul 20, 5:53 pm) |
| Average | 79 °F | 76% | 30.05 "Hg |
| * Reported Jul 10 4:53 pm — Jul 25 4:53 pm, Borough of Mercersburg. Weather by CustomWeather, © 2025 | |||
Note: Actual official high and low records may vary slightly from our data, if they occured in-between our weather recording intervals... More about our weather records
Borough of Mercersburg Weather History for the Previous 24 Hours
Scroll right to see more
| Conditions | Comfort | |||||||
|---|---|---|---|---|---|---|---|---|
| Time | Temp | Weather | Wind | Humidity | Barometer | Visibility | ||
| 4:53 pm Fri, Jul 25 | | 93 °F | Sunny. | 9 mph | ↑ | 54% | 29.99 "Hg | 10 mi |
| 3:53 pm | | 93 °F | Sunny. | 9 mph | ↑ | 58% | 29.99 "Hg | 10 mi |
| 2:53 pm | | 92 °F | Sunny. | 9 mph | ↑ | 58% | 30.01 "Hg | 10 mi |
| 1:53 pm | | 92 °F | Sunny. | 14 mph | ↑ | 58% | 30.03 "Hg | 10 mi |
| 12:53 pm |  | 90 °F | Scattered clouds. | 8 mph | ↑ | 61% | 30.05 "Hg | 10 mi |
| 11:53 am | | 89 °F | Sunny. | 10 mph | ↑ | 63% | 30.06 "Hg | 10 mi |
| 10:53 am | | 86 °F | Scattered clouds. | 10 mph | ↑ | 65% | 30.07 "Hg | 10 mi |
| 9:53 am | | 83 °F | Passing clouds. | 3 mph | ↑ | 74% | 30.06 "Hg | 10 mi |
| 8:53 am | | 81 °F | Sunny. | 3 mph | ↑ | 77% | 30.07 "Hg | 10 mi |
| 7:53 am | | 79 °F | Scattered clouds. | 7 mph | ↑ | 79% | 30.06 "Hg | 10 mi |
| 6:53 am | | 76 °F | Sunny. | 7 mph | ↑ | 85% | 30.05 "Hg | 10 mi |
| 5:53 am |  | 75 °F | Clear. | 8 mph | ↑ | 88% | 30.05 "Hg | 10 mi |
| 4:53 am | | 75 °F | Clear. | 8 mph | ↑ | 88% | 30.04 "Hg | 10 mi |
| 3:53 am | | 76 °F | Clear. | 6 mph | ↑ | 85% | 30.05 "Hg | 10 mi |
| 2:53 am | | 77 °F | Clear. | 8 mph | ↑ | 82% | 30.06 "Hg | 10 mi |
| 1:53 am | | 77 °F | Clear. | 6 mph | ↑ | 79% | 30.08 "Hg | 10 mi |
| 12:53 am | | 78 °F | Clear. | 3 mph | ↑ | 76% | 30.08 "Hg | 10 mi |
| 11:53 pm Thu, Jul 24 | | 79 °F | Clear. | 6 mph | ↑ | 74% | 30.08 "Hg | 10 mi |
| 10:53 pm | | 80 °F | Clear. | 7 mph | ↑ | 71% | 30.08 "Hg | 10 mi |
| 9:53 pm | | 82 °F | Clear. | 8 mph | ↑ | 67% | 30.09 "Hg | 10 mi |
| 8:53 pm | | 84 °F | Clear. | 9 mph | ↑ | 65% | 30.08 "Hg | 10 mi |
| 7:53 pm | | 86 °F | Sunny. | 13 mph | ↑ | 59% | 30.08 "Hg | 10 mi |
| 6:53 pm | | 88 °F | Sunny. | 14 mph | ↑ | 55% | 30.09 "Hg | 10 mi |
| Weather by CustomWeather, © 2025 | ||||||||