The Weather Network
Weather
Maps
News
Video
|
Welcome
Monthly
⋮
Current
Hourly
7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Lewiston, ID
Content continues below
September
Average Temperature
High
26°
Feels 26
Low
11°
Feels 11
Average Precipitation
5 Days
Rain amount
11.2mm
Snow amount
0cm
Content continues below
Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
23°
3
19°
4
20°
5
22°
6
24°
7
22°
8
24°
9
26°
10
27°
11
26°
12
24°
13
23°
14
24°
15
25°
16
25°
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Forecast
Wednesday, September 2, 2026
Day
23°
Feels 23
Wind
13 km/h NE
Gust
20 km/h
Humidity
44%
P.O.P
80%
Rain
2-4 mm
Night
13°
Feels 13
Wind
11 km/h N
Gust
17 km/h
Humidity
94%
P.O.P
80%
Rain
~5 mm
Historical Averages
Sep 2
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.