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Current
Hourly
7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Armstrong, IA
Content continues below
May
Average Temperature
High
21°
Feels 21
Low
9°
Feels 7
Average Precipitation
13 Days
Rain amount
94.1mm
Snow amount
0.1cm
Content continues below
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
18
19
20
21
16°
22
19°
23
21°
24
25°
25
25°
26
28°
27
23°
28
24°
29
25°
30
25°
31
26°
Forecast
Thursday, May 21, 2026
Day
16°
Feels 15
Wind
25 km/h SE
Gust
38 km/h
Humidity
45%
P.O.P
30%
Night
10°
Feels 7
Wind
25 km/h E
Gust
38 km/h
Humidity
76%
P.O.P
70%
Rain
~1 mm
Historical Averages
May 21
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.