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
Adelphi, MD
Content continues below
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
22°
16
28°
17
32°
18
35°
19
36°
20
34°
21
22°
22
23°
23
25°
24
26°
25
28°
26
29°
27
29°
28
28°
29
29°
30
31
Forecast
Friday, May 15, 2026
Day
22°
Feels 22
Wind
19 km/h NW
Gust
29 km/h
Humidity
39%
P.O.P
30%
Night
10°
Feels 10
Wind
8 km/h NW
Gust
11 km/h
Humidity
82%
P.O.P
30%
Historical Averages
May 15
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.
May
Average Temperature
High
24°
Feels 24
Low
13°
Feels 13
Average Precipitation
12 Days
Rain amount
91.1mm
Snow amount
0cm