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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Hermiston, OR
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May
Average Temperature
High
23°
Feels 23
Low
9°
Feels 7
Average Precipitation
7 Days
Rain amount
26.9mm
Snow amount
0cm
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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
20°
18
23°
19
25°
20
26°
21
29°
22
29°
23
28°
24
28°
25
25°
26
27°
27
26°
28
24°
29
24°
30
26°
31
26°
Forecast
Sunday, May 17, 2026
Day
20°
Feels 20
Wind
20 km/h W
Gust
30 km/h
Humidity
24%
P.O.P
10%
Night
7°
Feels 5
Wind
19 km/h SW
Gust
29 km/h
Humidity
76%
P.O.P
10%
Historical Averages
May 17
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.