Monthly Historical AveragesHarlan, IA
Average Temperature
High
22°
Feels 22
Low
10°
Feels 9
Average Precipitation
12 Days
109.2mm
0.1cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastFriday, May 22, 2026
Day
19°Feels 19
Wind
26 km/h SE
Gust
39 km/h
Humidity
72%
P.O.P
80%
Rain
2-4 mm
Night
11°Feels 10
Wind
17 km/h S
Gust
27 km/h
Humidity
100%
P.O.P
80%
Rain
<1 mm
Historical AveragesMay 22
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity