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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Saint Helens, 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
19
17°
20
19°
21
24°
22
23°
23
21°
24
20°
25
11°
26
15°
27
18°
28
16°
29
12°
30
14°
31
16°
Forecast
Tuesday, May 19, 2026
Day
17°
Feels 17
Wind
8 km/h NW
Gust
12 km/h
Humidity
59%
P.O.P
30%
Night
8°
Feels 7
Wind
8 km/h NW
Gust
12 km/h
Humidity
93%
P.O.P
30%
Historical Averages
May 19
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.
May
Average Temperature
High
17°
Feels 17
Low
7°
Feels 6
Average Precipitation
12 Days
Rain amount
69.5mm
Snow amount
0cm