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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Rainier, WA
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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
18°
19
17°
20
17°
21
23°
22
22°
23
21°
24
16°
25
15°
26
17°
27
15°
28
13°
29
15°
30
17°
31
19°
Forecast
Monday, May 18, 2026
Day
18°
Feels 18
Wind
17 km/h W
Gust
26 km/h
Humidity
45%
P.O.P
30%
Night
9°
Feels 8
Wind
16 km/h SW
Gust
24 km/h
Humidity
93%
P.O.P
30%
Historical Averages
May 18
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.
May
Average Temperature
High
18°
Feels 17
Low
7°
Feels 5
Average Precipitation
9 Days
Rain amount
48.4mm
Snow amount
0cm