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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Portland, ME
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September
Average Temperature
High
22°
Feels 22
Low
11°
Feels 11
Average Precipitation
9 Days
Rain amount
55.3mm
Snow amount
0.1cm
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Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
19°
3
21°
4
25°
5
20°
6
22°
7
23°
8
23°
9
20°
10
23°
11
21°
12
22°
13
22°
14
22°
15
21°
16
20°
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Forecast
Wednesday, September 2, 2026
Day
19°
Feels 19
Wind
14 km/h E
Gust
34 km/h
Humidity
73%
P.O.P
30%
Night
17°
Feels 16
Wind
14 km/h SE
Gust
31 km/h
Humidity
100%
P.O.P
100%
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.