Monthly Historical AveragesBlack Diamond, WA
Average Temperature
High
18°
Feels 18
Low
8°
Feels 7
Average Precipitation
10 Days
47.1mm
0cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastFriday, May 22, 2026
Day
24°Feels 24
Wind
13 km/h NW
Gust
20 km/h
Humidity
44%
P.O.P
10%
Night
10°Feels 9
Wind
13 km/h S
Gust
20 km/h
Humidity
96%
P.O.P
20%
Historical AveragesMay 22
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity