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Monthly 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
18
+25
+19
18 August, sun
+25
+19
Feels like
+25
759 mmHg
60%
3.2
m/s
NW
18 August, Sunday. day, 25°; night, 19°; clear
19
+24
+18
19 August, mon
+24
+18
Feels like
+24
759 mmHg
61%
3.4
m/s
W
19 August, Monday. day, 24°; night, 18°; partly cloudy
20
+24
+18
20 August, tue
+24
+18
Feels like
+24
759 mmHg
60%
2.7
m/s
SW
20 August, Tuesday. day, 24°; night, 18°; partly cloudy
21
+23
+17
21 August, wed
+23
+17
Feels like
+23
760 mmHg
61%
3
m/s
SW
21 August, Wednesday. day, 23°; night, 17°; partly cloudy
22
August
+21
+15
22 August, thu
+21
+15
Feels like
+16
753 mmHg
78%
4.1
m/s
N
Climate normal
+23
+18
22 August, Thursday. day, 21°; night, 15°; rain
23
+15
+13
23 August, fri
+15
+13
Feels like
+13
750 mmHg
92%
5.1
m/s
S
Climate normal
+24
+18
23 August, Friday. day, 15°; night, 13°; rain
24
+19
+14
24 August, sat
+19
+14
Feels like
+12
756 mmHg
81%
6.9
m/s
S
Climate normal
+24
+18
24 August, Saturday. day, 19°; night, 14°; rain
25
+21
+14
25 August, sun
+21
+14
Feels like
+18
762 mmHg
75%
3.3
m/s
S
Climate normal
+24
+19
25 August, Sunday. day, 21°; night, 14°; partly cloudy
26
+24
+14
26 August, mon
+24
+14
Feels like
+21
760 mmHg
70%
3.1
m/s
S
Climate normal
+26
+19
26 August, Monday. day, 24°; night, 14°; partly cloudy
27
+19
+12
27 August, tue
+19
+12
Feels like
+15
761 mmHg
66%
3.5
m/s
N
Climate normal
+22
+18
27 August, Tuesday. day, 19°; night, 12°; rain
28
+20
+13
28 August, wed
+20
+13
Feels like
+15
761 mmHg
63%
4
m/s
NW
Climate normal
+21
+16
28 August, Wednesday. day, 20°; night, 13°; mostly clear
29
+23
+14
29 August, thu
+23
+14
Feels like
+18
758 mmHg
62%
4.4
m/s
N
Climate normal
+22
+16
29 August, Thursday. day, 23°; night, 14°; partly cloudy
30
+26
+15
30 August, fri
+26
+15
Feels like
+21
757 mmHg
60%
3.7
m/s
NW
Climate normal
+20
+16
30 August, Friday. day, 26°; night, 15°; mostly clear
31
+26
+16
31 August, sat
+26
+16
Feels like
+21
757 mmHg
61%
3.6
m/s
NW
Climate normal
+21
+17
31 August, Saturday. day, 26°; night, 16°; partly cloudy
1 September
+26
+15
1 September, sun
+26
+15
Feels like
+22
756 mmHg
60%
4.1
m/s
NW
Climate normal
+22
+16
1 September, Sunday. day, 26°; night, 15°; partly cloudy
2
+25
+15
2 September, mon
+25
+15
Feels like
+20
755 mmHg
64%
4.5
m/s
NW
Climate normal
+22
+17
2 September, Monday. day, 25°; night, 15°; partly cloudy
3
+23
+11
3 September, tue
+23
+11
Feels like
+17
746 mmHg
69%
4.4
m/s
W
Climate normal
+22
+17
3 September, Tuesday. day, 23°; night, 11°; partly cloudy
4
+26
+8
4 September, wed
+26
+8
Feels like
+18
716 mmHg
60%
4.1
m/s
W
Climate normal
+22
+17
4 September, Wednesday. day, 26°; night, 8°; clear
5
+24
+7
5 September, thu
+24
+7
Feels like
+15
717 mmHg
65%
4.3
m/s
W
Climate normal
+21
+17
5 September, Thursday. day, 24°; night, 7°; clear
6
+24
+9
6 September, fri
+24
+9
Feels like
+15
717 mmHg
61%
3.9
m/s
W
Climate normal
+22
+17
6 September, Friday. day, 24°; night, 9°; clear
7
+24
+14
7 September, sat
+24
+14
Feels like
+17
718 mmHg
69%
4.2
m/s
W
Climate normal
+22
+18
7 September, Saturday. day, 24°; night, 14°; clear
8
+27
+16
8 September, sun
+27
+16
Feels like
+21
717 mmHg
61%
2.8
m/s
NW
Climate normal
+22
+17
8 September, Sunday. day, 27°; night, 16°; rain
9
+29
+13
9 September, mon
+29
+13
Feels like
+24
715 mmHg
56%
2.6
m/s
W
Climate normal
+22
+17
9 September, Monday. day, 29°; night, 13°; rain
10
+21
+13
10 September, tue
+21
+13
Feels like
+16
717 mmHg
82%
4.5
m/s
W
Climate normal
+25
+18
10 September, Tuesday. day, 21°; night, 13°; mostly clear
11
+22
+12
11 September, wed
+22
+12
Feels like
+16
720 mmHg
65%
4
m/s
W
Climate normal
+23
+17
11 September, Wednesday. day, 22°; night, 12°; clear
12
+20
+12
12 September, thu
+20
+12
Feels like
+16
717 mmHg
73%
4.2
m/s
NW
Climate normal
+21
+16
12 September, Thursday. day, 20°; night, 12°; mostly clear
13
+15
+8
13 September, fri
+15
+8
Feels like
+8
715 mmHg
64%
6.4
m/s
W
Climate normal
+22
+16
13 September, Friday. day, 15°; night, 8°; light rain
14
+17
+8
14 September, sat
+17
+8
Feels like
+10
719 mmHg
58%
2.9
m/s
NW
Climate normal
+22
+17
14 September, Saturday. day, 17°; night, 8°; rain
15
+20
+7
15 September, sun
+20
+7
Feels like
+12
721 mmHg
56%
2.4
m/s
NW
Climate normal
+21
+16
15 September, Sunday. day, 20°; night, 7°; clear
16
+18
+13
16 September, mon
+18
+13
Feels like
+13
717 mmHg
72%
4.3
m/s
W
Climate normal
+20
+15
16 September, Monday. day, 18°; night, 13°; partly cloudy
17
+14
+12
17 September, tue
+14
+12
Feels like
+11
716 mmHg
96%
3.3
m/s
W
Climate normal
+20
+16
17 September, Tuesday. day, 14°; night, 12°; rain
18
+14
+10
18 September, wed
+14
+10
Feels like
+10
713 mmHg
91%
3.2
m/s
SW
Climate normal
+20
+15
18 September, Wednesday. day, 14°; night, 10°; rain
19
+11
+7
19 September, thu
+11
+7
Feels like
+8
709 mmHg
96%
3.4
m/s
SW
Climate normal
+19
+15
19 September, Thursday. day, 11°; night, 7°; light rain
20
+10
+8
20 September, fri
+10
+8
Feels like
+6
714 mmHg
92%
3.5
m/s
SW
Climate normal
+20
+14
20 September, Friday. day, 10°; night, 8°; partly cloudy
Average data for 10 years
Next, the average data for 10 years
21
+20
+15
21 September, sat
+20
+15
Feels like
+20
760 mmHg
64%
2.9
m/s
S
21 September, Saturday. day, 20°; night, 15°; partly cloudy
Average for 30 days
14
sunny days
7
days with precipitation
9
cloudy days
14 sunny days; 7 days with precipitation; 9 cloudy days;
71
%
air humidity
4
m/s
Wind
W
26
mm of precipitation
(4% of annual average)
air humidity 71%; 26 millimeters of precipitation (4% of annual average); Wind westerly 4 Meters per second
Forecast in graphs
Temperature
Humidity, %
Wind, m/s
Pressure, mmHg
N
S
S
S
S
N
NW
N
NW
NW
NW
NW
W
W
W
W
W
NW
W
W
W
NW
W
NW
NW
W
W
SW
SW
SW
22
Average data for 10 years
23
24
25
26
27
28
29
30
31
1
September
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Daytime temperature
Night-time temperature