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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
August
+24
+16
19 August, mon
+24
+16
Feels like
+18
756 mmHg
62%
4.8
m/s
SW
Climate normal
+24
+18
19 August, Monday. day, 24°; night, 16°; partly cloudy
20
+20
+15
20 August, tue
+20
+15
Feels like
+17
758 mmHg
76%
3.8
m/s
S
Climate normal
+24
+18
20 August, Tuesday. day, 20°; night, 15°; light rain
21
+19
+15
21 August, wed
+19
+15
Feels like
+17
756 mmHg
78%
4.3
m/s
SW
Climate normal
+23
+17
21 August, Wednesday. day, 19°; night, 15°; light rain
22
+20
+15
22 August, thu
+20
+15
Feels like
+15
754 mmHg
81%
4.4
m/s
NW
Climate normal
+23
+18
22 August, Thursday. day, 20°; night, 15°; light rain
23
+21
+14
23 August, fri
+21
+14
Feels like
+16
753 mmHg
79%
4.8
m/s
S
Climate normal
+24
+18
23 August, Friday. day, 21°; night, 14°; mostly clear
24
+20
+15
24 August, sat
+20
+15
Feels like
+15
758 mmHg
74%
5.1
m/s
S
Climate normal
+24
+18
24 August, Saturday. day, 20°; night, 15°; light rain
25
+23
+15
25 August, sun
+23
+15
Feels like
+18
760 mmHg
67%
5.1
m/s
SW
Climate normal
+24
+19
25 August, Sunday. day, 23°; night, 15°; light rain
26
+24
+16
26 August, mon
+24
+16
Feels like
+20
761 mmHg
65%
3.3
m/s
SW
Climate normal
+26
+19
26 August, Monday. day, 24°; night, 16°; rain
27
+23
+15
27 August, tue
+23
+15
Feels like
+19
760 mmHg
68%
3.5
m/s
W
Climate normal
+22
+18
27 August, Tuesday. day, 23°; night, 15°; partly cloudy
28
+24
+15
28 August, wed
+24
+15
Feels like
+19
758 mmHg
61%
4.3
m/s
N
Climate normal
+21
+16
28 August, Wednesday. day, 24°; night, 15°; mostly clear
29
+24
+14
29 August, thu
+24
+14
Feels like
+19
757 mmHg
63%
4.8
m/s
W
Climate normal
+22
+16
29 August, Thursday. day, 24°; night, 14°; partly cloudy
30
+24
+14
30 August, fri
+24
+14
Feels like
+18
757 mmHg
62%
5.2
m/s
W
Climate normal
+20
+16
30 August, Friday. day, 24°; night, 14°; partly cloudy
31
+30
+13
31 August, sat
+30
+13
Feels like
+24
719 mmHg
52%
4.1
m/s
W
Climate normal
+21
+17
31 August, Saturday. day, 30°; night, 13°; mostly clear
1 September
+28
+13
1 September, sun
+28
+13
Feels like
+21
719 mmHg
56%
4.1
m/s
W
Climate normal
+22
+16
1 September, Sunday. day, 28°; night, 13°; clear
2
+27
+13
2 September, mon
+27
+13
Feels like
+20
718 mmHg
60%
4.2
m/s
W
Climate normal
+22
+17
2 September, Monday. day, 27°; night, 13°; clear
3
+28
+12
3 September, tue
+28
+12
Feels like
+21
715 mmHg
57%
4.2
m/s
NW
Climate normal
+22
+17
3 September, Tuesday. day, 28°; night, 12°; clear
4
+24
+14
4 September, wed
+24
+14
Feels like
+18
716 mmHg
68%
4
m/s
W
Climate normal
+22
+17
4 September, Wednesday. day, 24°; night, 14°; partly cloudy
5
+20
+7
5 September, thu
+20
+7
Feels like
+13
719 mmHg
72%
4.8
m/s
W
Climate normal
+21
+17
5 September, Thursday. day, 20°; night, 7°; partly cloudy
6
+23
+10
6 September, fri
+23
+10
Feels like
+15
721 mmHg
55%
3.8
m/s
NW
Climate normal
+22
+17
6 September, Friday. day, 23°; night, 10°; clear
7
+27
+16
7 September, sat
+27
+16
Feels like
+20
719 mmHg
51%
3.2
m/s
NW
Climate normal
+22
+18
7 September, Saturday. day, 27°; night, 16°; clear
8
+28
+14
8 September, sun
+28
+14
Feels like
+19
720 mmHg
35%
4.9
m/s
NE
Climate normal
+22
+17
8 September, Sunday. day, 28°; night, 14°; clear
9
+30
+16
9 September, mon
+30
+16
Feels like
+19
717 mmHg
40%
3.4
m/s
E
Climate normal
+22
+17
9 September, Monday. day, 30°; night, 16°; clear
10
+29
+9
10 September, tue
+29
+9
Feels like
+20
713 mmHg
50%
3
m/s
W
Climate normal
+25
+18
10 September, Tuesday. day, 29°; night, 9°; clear
11
+26
+6
11 September, wed
+26
+6
Feels like
+16
713 mmHg
56%
4.1
m/s
W
Climate normal
+23
+17
11 September, Wednesday. day, 26°; night, 6°; clear
12
+24
+6
12 September, thu
+24
+6
Feels like
+15
716 mmHg
63%
4
m/s
W
Climate normal
+21
+16
12 September, Thursday. day, 24°; night, 6°; clear
13
+22
+6
13 September, fri
+22
+6
Feels like
+14
718 mmHg
77%
4
m/s
W
Climate normal
+22
+16
13 September, Friday. day, 22°; night, 6°; mostly clear
14
+24
+12
14 September, sat
+24
+12
Feels like
+16
717 mmHg
61%
3.1
m/s
SW
Climate normal
+22
+17
14 September, Saturday. day, 24°; night, 12°; clear
15
+27
+9
15 September, sun
+27
+9
Feels like
+19
715 mmHg
54%
2.9
m/s
NW
Climate normal
+21
+16
15 September, Sunday. day, 27°; night, 9°; clear
16
+26
+8
16 September, mon
+26
+8
Feels like
+17
715 mmHg
60%
3.8
m/s
W
Climate normal
+20
+15
16 September, Monday. day, 26°; night, 8°; clear
17
+24
+7
17 September, tue
+24
+7
Feels like
+16
716 mmHg
60%
3.4
m/s
NW
Climate normal
+20
+16
17 September, Tuesday. day, 24°; night, 7°; clear
Average data for 10 years
Next, the average data for 10 years
18
+20
+15
18 September, wed
+20
+15
Feels like
+20
759 mmHg
68%
3.2
m/s
S
18 September, Wednesday. day, 20°; night, 15°; clear
19
+19
+15
19 September, thu
+19
+15
Feels like
+19
760 mmHg
67%
3.7
m/s
SW
19 September, Thursday. day, 19°; night, 15°; clear
20
+20
+14
20 September, fri
+20
+14
Feels like
+19
760 mmHg
63%
3.4
m/s
NW
20 September, Friday. day, 20°; night, 14°; clear
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
18
sunny days
6
days with precipitation
6
cloudy days
18 sunny days; 6 days with precipitation; 6 cloudy days;
62
%
air humidity
4.1
m/s
Wind
W
6
mm of precipitation
(1% of annual average)
air humidity 62%; 6 millimeters of precipitation (1% of annual average); Wind westerly 4.1 Meters per second
Forecast in graphs
Temperature
Humidity, %
Wind, m/s
Pressure, mmHg
SW
S
SW
NW
S
S
SW
SW
W
N
W
W
W
W
W
NW
W
W
NW
NW
NE
E
W
W
W
W
SW
NW
W
NW
19
Average data for 10 years
20
21
22
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
Daytime temperature
Night-time temperature
