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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
August
+25
+14
18 August, sun
+25
+14
Feels like
+18
755 mmHg
70%
5.6
m/s
SW
Climate normal
+25
+19
18 August, Sunday. day, 25°; night, 14°; light rain
19
+24
+16
19 August, mon
+24
+16
Feels like
+19
756 mmHg
65%
5
m/s
SW
Climate normal
+24
+18
19 August, Monday. day, 24°; night, 16°; partly cloudy
20
+21
+15
20 August, tue
+21
+15
Feels like
+18
758 mmHg
77%
4.4
m/s
S
Climate normal
+24
+18
20 August, Tuesday. day, 21°; night, 15°; light rain
21
+20
+15
21 August, wed
+20
+15
Feels like
+14
757 mmHg
80%
5.5
m/s
S
Climate normal
+23
+17
21 August, Wednesday. day, 20°; night, 15°; rain
22
+21
+14
22 August, thu
+21
+14
Feels like
+16
754 mmHg
77%
4.1
m/s
NW
Climate normal
+23
+18
22 August, Thursday. day, 21°; night, 14°; light rain
23
+22
+15
23 August, fri
+22
+15
Feels like
+17
754 mmHg
73%
5
m/s
SW
Climate normal
+24
+18
23 August, Friday. day, 22°; night, 15°; light rain
24
+20
+16
24 August, sat
+20
+16
Feels like
+16
757 mmHg
73%
4.8
m/s
S
Climate normal
+24
+18
24 August, Saturday. day, 20°; night, 16°; light rain
25
+24
+16
25 August, sun
+24
+16
Feels like
+20
760 mmHg
68%
4.1
m/s
SW
Climate normal
+24
+19
25 August, Sunday. day, 24°; night, 16°; light rain
26
+24
+16
26 August, mon
+24
+16
Feels like
+20
760 mmHg
67%
3
m/s
NW
Climate normal
+26
+19
26 August, Monday. day, 24°; night, 16°; mostly clear
27
+23
+13
27 August, tue
+23
+13
Feels like
+18
759 mmHg
71%
4.3
m/s
SW
Climate normal
+22
+18
27 August, Tuesday. day, 23°; night, 13°; partly cloudy
28
+23
+13
28 August, wed
+23
+13
Feels like
+18
757 mmHg
64%
4.8
m/s
W
Climate normal
+21
+16
28 August, Wednesday. day, 23°; night, 13°; partly cloudy
29
+26
+14
29 August, thu
+26
+14
Feels like
+19
756 mmHg
59%
4.4
m/s
W
Climate normal
+22
+16
29 August, Thursday. day, 26°; night, 14°; partly cloudy
30
+22
+6
30 August, fri
+22
+6
Feels like
+14
736 mmHg
65%
4.3
m/s
W
Climate normal
+20
+16
30 August, Friday. day, 22°; night, 6°; partly cloudy
31
+22
+9
31 August, sat
+22
+9
Feels like
+15
717 mmHg
66%
3.5
m/s
W
Climate normal
+21
+17
31 August, Saturday. day, 22°; night, 9°; clear
1 September
+23
+10
1 September, sun
+23
+10
Feels like
+16
715 mmHg
61%
3.6
m/s
SW
Climate normal
+22
+16
1 September, Sunday. day, 23°; night, 10°; clear
2
+15
+12
2 September, mon
+15
+12
Feels like
+13
716 mmHg
93%
2.5
m/s
SW
Climate normal
+22
+17
2 September, Monday. day, 15°; night, 12°; light rain
3
+14
+8
3 September, tue
+14
+8
Feels like
+11
717 mmHg
93%
2.4
m/s
W
Climate normal
+22
+17
3 September, Tuesday. day, 14°; night, 8°; rain
4
+17
+7
4 September, wed
+17
+7
Feels like
+10
719 mmHg
64%
3.6
m/s
W
Climate normal
+22
+17
4 September, Wednesday. day, 17°; night, 7°; mostly clear
5
+22
+6
5 September, thu
+22
+6
Feels like
+12
718 mmHg
57%
4.3
m/s
NW
Climate normal
+21
+17
5 September, Thursday. day, 22°; night, 6°; clear
6
+21
+8
6 September, fri
+21
+8
Feels like
+13
715 mmHg
63%
4.5
m/s
W
Climate normal
+22
+17
6 September, Friday. day, 21°; night, 8°; clear
7
+18
+8
7 September, sat
+18
+8
Feels like
+10
715 mmHg
67%
5
m/s
W
Climate normal
+22
+18
7 September, Saturday. day, 18°; night, 8°; mostly clear
8
+18
+3
8 September, sun
+18
+3
Feels like
+9
718 mmHg
64%
4
m/s
W
Climate normal
+22
+17
8 September, Sunday. day, 18°; night, 3°; clear
9
+18
+7
9 September, mon
+18
+7
Feels like
+11
719 mmHg
45%
3.6
m/s
N
Climate normal
+22
+17
9 September, Monday. day, 18°; night, 7°; mostly clear
10
+19
+5
10 September, tue
+19
+5
Feels like
+9
718 mmHg
44%
3.8
m/s
N
Climate normal
+25
+18
10 September, Tuesday. day, 19°; night, 5°; clear
11
+20
+4
11 September, wed
+20
+4
Feels like
+11
717 mmHg
51%
3.5
m/s
NW
Climate normal
+23
+17
11 September, Wednesday. day, 20°; night, 4°; clear
12
+19
+2
12 September, thu
+19
+2
Feels like
+11
716 mmHg
60%
3.5
m/s
W
Climate normal
+21
+16
12 September, Thursday. day, 19°; night, 2°; mostly clear
13
+18
+11
13 September, fri
+18
+11
Feels like
+11
718 mmHg
67%
4.1
m/s
W
Climate normal
+22
+16
13 September, Friday. day, 18°; night, 11°; partly cloudy
14
+13
+8
14 September, sat
+13
+8
Feels like
+9
719 mmHg
93%
5
m/s
W
Climate normal
+22
+17
14 September, Saturday. day, 13°; night, 8°; light rain
15
+14
+4
15 September, sun
+14
+4
Feels like
+5
723 mmHg
72%
3.6
m/s
W
Climate normal
+21
+16
15 September, Sunday. day, 14°; night, 4°; partly cloudy
16
+17
+8
16 September, mon
+17
+8
Feels like
+11
723 mmHg
58%
2.6
m/s
NW
Climate normal
+20
+15
16 September, Monday. day, 17°; night, 8°; mostly clear
Average data for 10 years
Next, the average data for 10 years
17
+20
+16
17 September, tue
+20
+16
Feels like
+20
759 mmHg
68%
3
m/s
SW
17 September, Tuesday. day, 20°; night, 16°; rain
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
14
sunny days
9
days with precipitation
7
cloudy days
14 sunny days; 9 days with precipitation; 7 cloudy days;
68
%
air humidity
4.1
m/s
Wind
W
8
mm of precipitation
(2% of annual average)
air humidity 68%; 8 millimeters of precipitation (2% of annual average); Wind westerly 4.1 Meters per second
Forecast in graphs
Temperature
Humidity, %
Wind, m/s
Pressure, mmHg
SW
SW
S
S
NW
SW
S
SW
NW
SW
W
W
W
W
SW
SW
W
W
NW
W
W
W
N
N
NW
W
W
W
W
NW
18
Average data for 10 years
19
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
Daytime temperature
Night-time temperature
