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September weather forecast in Portland
30 days
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
30 days
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun
Sunday
Mon
Monday
Tue
Tuesday
Wed
Wednesday
Thu
Thursday
Fri
Friday
Sat
Saturday
1
+21
+18
1 September, Sunday. day, 21°; night, 18°; clear
2
+21
+18
2 September, Monday. day, 21°; night, 18°; rain
3
+21
+17
3 September, Tuesday. day, 21°; night, 17°; clear
4
+21
+17
4 September, Wednesday. day, 21°; night, 17°; clear
5
+20
+17
5 September, Thursday. day, 20°; night, 17°; partly cloudy
6
+20
+17
6 September, Friday. day, 20°; night, 17°; clear
7
+20
+17
7 September, Saturday. day, 20°; night, 17°; partly cloudy
8
+20
+16
8 September, Sunday. day, 20°; night, 16°; partly cloudy
9
+19
+16
9 September, Monday. day, 19°; night, 16°; rain
10
+19
+15
10 September, Tuesday. day, 19°; night, 15°; partly cloudy
11
+19
+16
11 September, Wednesday. day, 19°; night, 16°; clear
12
+18
+15
12 September, Thursday. day, 18°; night, 15°; rain
13
+19
+16
13 September, Friday. day, 19°; night, 16°; partly cloudy
14
+19
+16
14 September, Saturday. day, 19°; night, 16°; clear
15
+18
+15
15 September, Sunday. day, 18°; night, 15°; partly cloudy
16
+17
+14
16 September, Monday. day, 17°; night, 14°; rain
17
+17
+14
17 September, Tuesday. day, 17°; night, 14°; clear
18
+17
+14
18 September, Wednesday. day, 17°; night, 14°; partly cloudy
19
+18
+15
19 September, Thursday. day, 18°; night, 15°; clear
20
+18
+14
20 September, Friday. day, 18°; night, 14°; clear
21
+19
+15
21 September, Saturday. day, 19°; night, 15°; clear
22
+18
+15
22 September, Sunday. day, 18°; night, 15°; clear
23
+18
+16
23 September, Monday. day, 18°; night, 16°; clear
24
+17
+15
24 September, Tuesday. day, 17°; night, 15°; partly cloudy
25
+17
+13
25 September, Wednesday. day, 17°; night, 13°; clear
26
+18
+14
26 September, Thursday. day, 18°; night, 14°; clear
27
+19
+16
27 September, Friday. day, 19°; night, 16°; rain
28
+16
+15
28 September, Saturday. day, 16°; night, 15°; rain
29
+16
+14
29 September, Sunday. day, 16°; night, 14°; rain
30
+15
+13
30 September, Monday. day, 15°; night, 13°; clear
1
+15
+12
1 October, Tuesday. day, 15°; night, 12°; partly cloudy
2
+15
+12
2 October, Wednesday. day, 15°; night, 12°; overcast
3
+15
+13
3 October, Thursday. day, 15°; night, 13°; clear
4
+15
+13
4 October, Friday. day, 15°; night, 13°; rain
5
+14
+12
5 October, Saturday. day, 14°; night, 12°; partly cloudy
Average data for 10 years
Portland September
15
sunny days
7
days with precipitation
8
cloudy days
15 sunny days; 7 days with precipitation; 8 cloudy days;
75
%
air humidity
3.5
m/s
Wind
W
69
mm of precipitation
(8% of annual average)
+18
°C
Water temperature
air humidity 75%; 69 millimeters of precipitation (8% of annual average); Wind westerly 3.5 Meters per second; Water temperature +18°
Weather graphs for September
Temperature
Water temperature
Precipitation chance, %
Humidity, %
Wind, m/s
Pressure, mmHg
SW
S
SW
S
SW
S
W
S
N
NW
SW
S
SW
W
W
W
SW
SW
W
SE
W
W
W
N
NW
SE
S
SE
NE
N
1
Average data for 10 years
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Daytime temperature
Night-time temperature
Cities near you
Boston
Montreal
Quebec
Colchester
Lake George
Hartford
Anjou
Queensbury
Nantucket
Cities with similar weather in September
Toronto
Vancouver
Seattle
Balkhash
Montreal
Bruges
San Sebastian
Rijeka
Brest