Monthly Historical AveragesJohnston, IA
Average Temperature
High
16°
Feels 16
Low
5°
Feels 3
Average Precipitation
10 Days
83.2mm
0.3cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastSunday, April 12, 2026
Day
22°Feels 22
Wind
38 km/h S
Gust
57 km/h
Humidity
69%
P.O.P
40%
Rain
1-3 mm
Night
15°Feels 14
Wind
33 km/h S
Gust
50 km/h
Humidity
100%
P.O.P
40%
Rain
<1 mm
Historical AveragesApr 12
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity