The Weather Network
Weather
Maps
News
Video
|
Welcome
Monthly
⋮
Current
Hourly
7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Grantville, PA
Content continues below
May
Average Temperature
High
23°
Feels 23
Low
11°
Feels 11
Average Precipitation
13 Days
Rain amount
96.5mm
Snow amount
0cm
Content continues below
Daily Historical Averages
May 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
34°
19
35°
20
28°
21
20°
22
21°
23
18°
24
20°
25
21°
26
22°
27
22°
28
22°
29
22°
30
23°
31
23°
Forecast
Monday, May 18, 2026
Day
34°
Feels 36
Wind
16 km/h SW
Gust
37 km/h
Humidity
37%
P.O.P
30%
Night
21°
Feels 21
Wind
16 km/h S
Gust
34 km/h
Humidity
78%
P.O.P
40%
Rain
<1 mm
Historical Averages
May 18
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.