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September weather forecast in Seattle
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
31
+21
+17
31 August, sun
+21
+17
Feels like
+21
760 mmHg
66%
2.9
m/s
SW
31 August, Sunday. day, 21°; night, 17°; clear
1
+22
+16
1 September, mon
+22
+16
Feels like
+22
761 mmHg
61%
3.2
m/s
NW
1 September, Monday. day, 22°; night, 16°; clear
2
+22
+17
2 September, tue
+22
+17
Feels like
+22
761 mmHg
63%
3
m/s
NW
2 September, Tuesday. day, 22°; night, 17°; partly cloudy
3
+22
+17
3 September, wed
+22
+17
Feels like
+22
761 mmHg
61%
3
m/s
N
3 September, Wednesday. day, 22°; night, 17°; clear
4
+22
+17
4 September, thu
+22
+17
Feels like
+21
761 mmHg
61%
3.5
m/s
N
4 September, Thursday. day, 22°; night, 17°; rain
5
+21
+17
5 September, fri
+21
+17
Feels like
+21
761 mmHg
66%
3
m/s
S
5 September, Friday. day, 21°; night, 17°; partly cloudy
6
+22
+17
6 September, sat
+22
+17
Feels like
+22
760 mmHg
64%
3
m/s
N
6 September, Saturday. day, 22°; night, 17°; clear
7
+22
+18
7 September, sun
+22
+18
Feels like
+23
761 mmHg
62%
2.5
m/s
N
7 September, Sunday. day, 22°; night, 18°; partly cloudy
8
+22
+17
8 September, mon
+22
+17
Feels like
+22
761 mmHg
62%
3.4
m/s
NW
8 September, Monday. day, 22°; night, 17°; clear
9
+22
+17
9 September, tue
+22
+17
Feels like
+21
763 mmHg
64%
3.5
m/s
N
9 September, Tuesday. day, 22°; night, 17°; clear
10
+25
+18
10 September, wed
+25
+18
Feels like
+25
762 mmHg
52%
3.2
m/s
N
10 September, Wednesday. day, 25°; night, 18°; clear
11
+23
+17
11 September, thu
+23
+17
Feels like
+22
761 mmHg
56%
3
m/s
N
11 September, Thursday. day, 23°; night, 17°; clear
12
+21
+16
12 September, fri
+21
+16
Feels like
+21
760 mmHg
57%
3.2
m/s
N
12 September, Friday. day, 21°; night, 16°; clear
13
+22
+16
13 September, sat
+22
+16
Feels like
+21
759 mmHg
56%
3
m/s
N
13 September, Saturday. day, 22°; night, 16°; clear
14
+22
+17
14 September, sun
+22
+17
Feels like
+22
759 mmHg
55%
2.5
m/s
W
14 September, Sunday. day, 22°; night, 17°; partly cloudy
15
+21
+16
15 September, mon
+21
+16
Feels like
+21
760 mmHg
60%
2.7
m/s
N
15 September, Monday. day, 21°; night, 16°; clear
16
+20
+15
16 September, tue
+20
+15
Feels like
+19
759 mmHg
67%
2.9
m/s
NE
16 September, Tuesday. day, 20°; night, 15°; overcast
17
+20
+16
17 September, wed
+20
+16
Feels like
+20
759 mmHg
68%
3
m/s
SW
17 September, Wednesday. day, 20°; night, 16°; rain
18
+20
+15
18 September, thu
+20
+15
Feels like
+20
759 mmHg
68%
3.2
m/s
S
18 September, Thursday. day, 20°; night, 15°; clear
19
+19
+15
19 September, fri
+19
+15
Feels like
+19
760 mmHg
67%
3.7
m/s
SW
19 September, Friday. day, 19°; night, 15°; clear
20
+20
+14
20 September, sat
+20
+14
Feels like
+19
760 mmHg
63%
3.4
m/s
NW
20 September, Saturday. day, 20°; night, 14°; clear
21
+20
+15
21 September, sun
+20
+15
Feels like
+20
760 mmHg
64%
2.9
m/s
S
21 September, Sunday. day, 20°; night, 15°; partly cloudy
22
+19
+15
22 September, mon
+19
+15
Feels like
+19
760 mmHg
68%
2.5
m/s
S
22 September, Monday. day, 19°; night, 15°; rain
23
+19
+15
23 September, tue
+19
+15
Feels like
+19
761 mmHg
68%
2.9
m/s
E
23 September, Tuesday. day, 19°; night, 15°; clear
24
+18
+15
24 September, wed
+18
+15
Feels like
+18
761 mmHg
68%
3.2
m/s
SE
24 September, Wednesday. day, 18°; night, 15°; clear
25
+18
+15
25 September, thu
+18
+15
Feels like
+18
763 mmHg
74%
3.5
m/s
E
25 September, Thursday. day, 18°; night, 15°; rain
26
+19
+15
26 September, fri
+19
+15
Feels like
+19
762 mmHg
70%
3
m/s
N
26 September, Friday. day, 19°; night, 15°; partly cloudy
27
+19
+14
27 September, sat
+19
+14
Feels like
+18
760 mmHg
68%
4.1
m/s
N
27 September, Saturday. day, 19°; night, 14°; clear
28
+19
+14
28 September, sun
+19
+14
Feels like
+17
759 mmHg
66%
4
m/s
NE
28 September, Sunday. day, 19°; night, 14°; rain
29
+18
+13
29 September, mon
+18
+13
Feels like
+16
760 mmHg
68%
3.5
m/s
NE
29 September, Monday. day, 18°; night, 13°; clear
30
+17
+14
30 September, tue
+17
+14
Feels like
+16
763 mmHg
68%
3.2
m/s
S
30 September, Tuesday. day, 17°; night, 14°; clear
1
+17
+14
1 October, wed
+17
+14
Feels like
+16
763 mmHg
69%
3.5
m/s
N
1 October, Wednesday. day, 17°; night, 14°; partly cloudy
2
+17
+13
2 October, thu
+17
+13
Feels like
+15
762 mmHg
68%
3.2
m/s
N
2 October, Thursday. day, 17°; night, 13°; clear
3
+17
+13
3 October, fri
+17
+13
Feels like
+15
761 mmHg
62%
3.5
m/s
N
3 October, Friday. day, 17°; night, 13°; partly cloudy
4
+17
+13
4 October, sat
+17
+13
Feels like
+16
760 mmHg
64%
3.7
m/s
N
4 October, Saturday. day, 17°; night, 13°; rain
Average data for 10 years
Seattle September
18
sunny days
5
days with precipitation
7
cloudy days
18 sunny days; 5 days with precipitation; 7 cloudy days;
63
%
air humidity
2.2
m/s
Wind
N
30
mm of precipitation
(5% of annual average)
air humidity 63%; 30 millimeters of precipitation (5% of annual average); Wind northerly 2.2 Meters per second
Weather graphs for September
Temperature
Precipitation chance, %
Humidity, %
Wind, m/s
Pressure, mmHg
NW
NW
N
N
S
N
N
NW
N
N
N
N
N
W
N
NE
SW
S
SW
NW
S
S
E
SE
E
N
N
NE
NE
S
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
Vancouver
Portland
Salem
Victoria
Eugene
Vancouver
Bellingham
Courtenay
Campbell River
Cities with similar weather in September
San Francisco
Podgorica
Toronto
Genoa
Boston
Lima
Albena
San Remo
San Sebastian
