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7 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Mount Rainier, MD
Content continues below
September
Average Temperature
High
26°
Feels 27
Low
17°
Feels 17
Average Precipitation
8 Days
Rain amount
63.9mm
Snow amount
0cm
Content continues below
Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
32°
11
28°
12
28°
13
30°
14
29°
15
30°
16
32°
17
30°
18
28°
19
24°
20
28°
21
27°
22
26°
23
26°
24
28°
25
26
27
28
29
30
Forecast
Thursday, September 10, 2026
Day
32°
Feels 34
Wind
13 km/h W
Gust
20 km/h
Humidity
48%
P.O.P
60%
Rain
~5 mm
Night
20°
Feels 21
Wind
9 km/h W
Gust
14 km/h
Humidity
96%
P.O.P
90%
Rain
~10 mm
Historical Averages
Sep 10
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.