Monthly Historical AveragesJohnston, IA
Average Temperature
High
0°
Feels -3
Low
-9°
Feels -14
Average Precipitation
4 Days
4.3mm
12.9cm
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Daily Historical Averages
S
M
T
W
T
F
S
ForecastSunday, February 22, 2026
Day
-7°Feels -15
Wind
34 km/h NW
Gust
53 km/h
Humidity
62%
P.O.P
20%
Night
-17°Feels -25
Wind
27 km/h NW
Gust
41 km/h
Humidity
85%
P.O.P
20%
Historical AveragesFeb 22
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity