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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
+23
+18
22 August, thu
+23
+18
Feels like
+23
762 mmHg
60%
2.5
m/s
NW
22 August, Thursday. day, 23°; night, 18°; clear
23
+24
+18
23 August, fri
+24
+18
Feels like
+24
761 mmHg
56%
2.9
m/s
N
23 August, Friday. day, 24°; night, 18°; clear
24
August
+17
+14
24 August, sat
+17
+14
Feels like
+12
756 mmHg
89%
5.6
m/s
S
Climate normal
+24
+18
24 August, Saturday. day, 17°; night, 14°; rain
25
+22
+14
25 August, sun
+22
+14
Feels like
+17
762 mmHg
72%
3.3
m/s
N
Climate normal
+24
+19
25 August, Sunday. day, 22°; night, 14°; light rain
26
+24
+14
26 August, mon
+24
+14
Feels like
+17
759 mmHg
71%
5.1
m/s
SW
Climate normal
+26
+19
26 August, Monday. day, 24°; night, 14°; light rain
27
+18
+11
27 August, tue
+18
+11
Feels like
+14
761 mmHg
70%
4.2
m/s
E
Climate normal
+22
+18
27 August, Tuesday. day, 18°; night, 11°; light rain
28
+20
+13
28 August, wed
+20
+13
Feels like
+15
762 mmHg
65%
4.5
m/s
N
Climate normal
+21
+16
28 August, Wednesday. day, 20°; night, 13°; mostly clear
29
+23
+15
29 August, thu
+23
+15
Feels like
+18
758 mmHg
63%
4.4
m/s
N
Climate normal
+22
+16
29 August, Thursday. day, 23°; night, 15°; clear
30
+25
+15
30 August, fri
+25
+15
Feels like
+21
757 mmHg
65%
3.6
m/s
NW
Climate normal
+20
+16
30 August, Friday. day, 25°; night, 15°; clear
31
+26
+17
31 August, sat
+26
+17
Feels like
+23
756 mmHg
64%
3.4
m/s
NW
Climate normal
+21
+17
31 August, Saturday. day, 26°; night, 17°; mostly clear
1 September
+27
+17
1 September, sun
+27
+17
Feels like
+23
754 mmHg
58%
4.1
m/s
N
Climate normal
+22
+16
1 September, Sunday. day, 27°; night, 17°; partly cloudy
2
+28
+17
2 September, mon
+28
+17
Feels like
+23
754 mmHg
57%
3.4
m/s
NW
Climate normal
+22
+17
2 September, Monday. day, 28°; night, 17°; mostly clear
3
+26
+16
3 September, tue
+26
+16
Feels like
+22
756 mmHg
62%
3.8
m/s
W
Climate normal
+22
+17
3 September, Tuesday. day, 26°; night, 16°; partly cloudy
4
+24
+16
4 September, wed
+24
+16
Feels like
+19
756 mmHg
70%
5.2
m/s
W
Climate normal
+22
+17
4 September, Wednesday. day, 24°; night, 16°; partly cloudy
5
+24
+13
5 September, thu
+24
+13
Feels like
+19
756 mmHg
70%
5.5
m/s
W
Climate normal
+21
+17
5 September, Thursday. day, 24°; night, 13°; partly cloudy
6
+27
+10
6 September, fri
+27
+10
Feels like
+21
717 mmHg
52%
3.3
m/s
W
Climate normal
+22
+17
6 September, Friday. day, 27°; night, 10°; mostly clear
7
+23
+12
7 September, sat
+23
+12
Feels like
+16
715 mmHg
53%
4.6
m/s
W
Climate normal
+22
+18
7 September, Saturday. day, 23°; night, 12°; mostly clear
8
+13
+7
8 September, sun
+13
+7
Feels like
+9
716 mmHg
90%
3.8
m/s
W
Climate normal
+22
+17
8 September, Sunday. day, 13°; night, 7°; light rain
9
+17
+6
9 September, mon
+17
+6
Feels like
+9
718 mmHg
68%
3.6
m/s
W
Climate normal
+22
+17
9 September, Monday. day, 17°; night, 6°; clear
10
+19
+11
10 September, tue
+19
+11
Feels like
+12
716 mmHg
64%
3.5
m/s
SW
Climate normal
+25
+18
10 September, Tuesday. day, 19°; night, 11°; mostly clear
11
+13
+8
11 September, wed
+13
+8
Feels like
+8
712 mmHg
91%
3.8
m/s
W
Climate normal
+23
+17
11 September, Wednesday. day, 13°; night, 8°; rain
12
+16
+6
12 September, thu
+16
+6
Feels like
+9
715 mmHg
77%
3.8
m/s
NW
Climate normal
+21
+16
12 September, Thursday. day, 16°; night, 6°; mostly clear
13
+19
+4
13 September, fri
+19
+4
Feels like
+9
717 mmHg
58%
3.4
m/s
NW
Climate normal
+22
+16
13 September, Friday. day, 19°; night, 4°; clear
14
+18
+13
14 September, sat
+18
+13
Feels like
+14
715 mmHg
70%
3.1
m/s
SW
Climate normal
+22
+17
14 September, Saturday. day, 18°; night, 13°; light rain
15
+14
+5
15 September, sun
+14
+5
Feels like
+7
718 mmHg
74%
4.7
m/s
W
Climate normal
+21
+16
15 September, Sunday. day, 14°; night, 5°; light rain
16
+16
+11
16 September, mon
+16
+11
Feels like
+9
722 mmHg
70%
4.5
m/s
W
Climate normal
+20
+15
16 September, Monday. day, 16°; night, 11°; mostly clear
17
+15
+5
17 September, tue
+15
+5
Feels like
+7
721 mmHg
78%
3.7
m/s
W
Climate normal
+20
+16
17 September, Tuesday. day, 15°; night, 5°; mostly clear
18
+19
+8
18 September, wed
+19
+8
Feels like
+12
719 mmHg
60%
1.4
m/s
NW
Climate normal
+20
+15
18 September, Wednesday. day, 19°; night, 8°; clear
19
+20
+10
19 September, thu
+20
+10
Feels like
+13
714 mmHg
62%
3.5
m/s
W
Climate normal
+19
+15
19 September, Thursday. day, 20°; night, 10°; partly cloudy
20
+9
+4
20 September, fri
+9
+4
Feels like
+4
714 mmHg
89%
4.3
m/s
W
Climate normal
+20
+14
20 September, Friday. day, 9°; night, 4°; rain
21
+10
+4
21 September, sat
+10
+4
Feels like
+5
716 mmHg
73%
2.5
m/s
NW
Climate normal
+20
+15
21 September, Saturday. day, 10°; night, 4°; partly cloudy
Average for 30 days
14
sunny days
10
days with precipitation
6
cloudy days
14 sunny days; 10 days with precipitation; 6 cloudy days;
69
%
air humidity
3.9
m/s
Wind
W
15
mm of precipitation
(3% of annual average)
air humidity 69%; 15 millimeters of precipitation (3% of annual average); Wind westerly 3.9 Meters per second
Forecast in graphs
Temperature
Humidity, %
Wind, m/s
Pressure, mmHg
S
N
SW
E
N
N
NW
NW
N
NW
W
W
W
W
W
W
W
SW
W
NW
NW
SW
W
W
W
NW
W
W
NW
NW
24
Average data for 10 years
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
21
22
Daytime temperature
Night-time temperature