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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Armstrong, IA
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September
Average Temperature
High
23°
Feels 24
Low
11°
Feels 10
Average Precipitation
10 Days
Rain amount
70.5mm
Snow amount
0.1cm
Content continues below
Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
28°
12
24°
13
16°
14
21°
15
20°
16
21°
17
21°
18
21°
19
20°
20
19°
21
19°
22
19°
23
21°
24
21°
25
21°
26
27
28
29
30
Forecast
Friday, September 11, 2026
Day
28°
Feels 29
Wind
36 km/h S
Gust
54 km/h
Humidity
51%
P.O.P
10%
Night
18°
Feels 17
Wind
32 km/h S
Gust
48 km/h
Humidity
83%
P.O.P
20%
Historical Averages
Sep 11
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.