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September weather forecast in Issaquah
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
1
+21
+16
1 September, sun
+21
+16
Feels like
+21
759 mmHg
62%
3
m/s
NE
1 September, Sunday. day, 21°; night, 16°; clear
2
+21
+16
2 September, mon
+21
+16
Feels like
+21
760 mmHg
63%
2.9
m/s
N
2 September, Monday. day, 21°; night, 16°; partly cloudy
3
+21
+16
3 September, tue
+21
+16
Feels like
+21
760 mmHg
61%
3
m/s
N
3 September, Tuesday. day, 21°; night, 16°; clear
4
+21
+16
4 September, wed
+21
+16
Feels like
+20
759 mmHg
62%
3.5
m/s
N
4 September, Wednesday. day, 21°; night, 16°; rain
5
+21
+16
5 September, thu
+21
+16
Feels like
+20
759 mmHg
66%
3
m/s
SE
5 September, Thursday. day, 21°; night, 16°; partly cloudy
6
+21
+16
6 September, fri
+21
+16
Feels like
+21
759 mmHg
64%
3.2
m/s
N
6 September, Friday. day, 21°; night, 16°; clear
7
+22
+17
7 September, sat
+22
+17
Feels like
+22
760 mmHg
62%
2.5
m/s
N
7 September, Saturday. day, 22°; night, 17°; partly cloudy
8
+21
+16
8 September, sun
+21
+16
Feels like
+21
760 mmHg
62%
3.4
m/s
NW
8 September, Sunday. day, 21°; night, 16°; clear
9
+21
+17
9 September, mon
+21
+17
Feels like
+21
761 mmHg
63%
3.4
m/s
N
9 September, Monday. day, 21°; night, 17°; clear
10
+24
+17
10 September, tue
+24
+17
Feels like
+24
760 mmHg
51%
3.2
m/s
NE
10 September, Tuesday. day, 24°; night, 17°; clear
11
+22
+17
11 September, wed
+22
+17
Feels like
+21
760 mmHg
55%
3.2
m/s
N
11 September, Wednesday. day, 22°; night, 17°; clear
12
+21
+15
12 September, thu
+21
+15
Feels like
+20
759 mmHg
57%
3.2
m/s
N
12 September, Thursday. day, 21°; night, 15°; clear
13
+21
+16
13 September, fri
+21
+16
Feels like
+20
758 mmHg
55%
3
m/s
N
13 September, Friday. day, 21°; night, 16°; clear
14
+22
+16
14 September, sat
+22
+16
Feels like
+21
758 mmHg
56%
2.5
m/s
E
14 September, Saturday. day, 22°; night, 16°; partly cloudy
15
+20
+16
15 September, sun
+20
+16
Feels like
+20
759 mmHg
58%
3
m/s
NE
15 September, Sunday. day, 20°; night, 16°; partly cloudy
16
+19
+15
16 September, mon
+19
+15
Feels like
+19
758 mmHg
66%
2.9
m/s
E
16 September, Monday. day, 19°; night, 15°; overcast
17
+20
+15
17 September, tue
+20
+15
Feels like
+20
758 mmHg
68%
2.5
m/s
S
17 September, Tuesday. day, 20°; night, 15°; clear
18
+19
+15
18 September, wed
+19
+15
Feels like
+19
758 mmHg
68%
3
m/s
S
18 September, Wednesday. day, 19°; night, 15°; clear
19
+19
+14
19 September, thu
+19
+14
Feels like
+18
758 mmHg
67%
3.4
m/s
S
19 September, Thursday. day, 19°; night, 14°; clear
20
+19
+14
20 September, fri
+19
+14
Feels like
+18
758 mmHg
63%
3.4
m/s
N
20 September, Friday. day, 19°; night, 14°; clear
21
+19
+15
21 September, sat
+19
+15
Feels like
+19
758 mmHg
64%
2.9
m/s
SE
21 September, Saturday. day, 19°; night, 15°; partly cloudy
22
+18
+14
22 September, sun
+18
+14
Feels like
+18
759 mmHg
69%
2.7
m/s
SE
22 September, Sunday. day, 18°; night, 14°; rain
23
+19
+15
23 September, mon
+19
+15
Feels like
+18
759 mmHg
68%
2.9
m/s
E
23 September, Monday. day, 19°; night, 15°; clear
24
+18
+14
24 September, tue
+18
+14
Feels like
+17
759 mmHg
68%
3
m/s
E
24 September, Tuesday. day, 18°; night, 14°; clear
25
+17
+14
25 September, wed
+17
+14
Feels like
+17
761 mmHg
75%
3.5
m/s
E
25 September, Wednesday. day, 17°; night, 14°; rain
26
+19
+15
26 September, thu
+19
+15
Feels like
+18
761 mmHg
69%
3
m/s
NE
26 September, Thursday. day, 19°; night, 15°; partly cloudy
27
+18
+13
27 September, fri
+18
+13
Feels like
+17
759 mmHg
67%
4
m/s
NE
27 September, Friday. day, 18°; night, 13°; clear
28
+18
+14
28 September, sat
+18
+14
Feels like
+17
757 mmHg
64%
3.7
m/s
E
28 September, Saturday. day, 18°; night, 14°; rain
29
+17
+13
29 September, sun
+17
+13
Feels like
+15
759 mmHg
68%
3.5
m/s
NE
29 September, Sunday. day, 17°; night, 13°; clear
30
+16
+13
30 September, mon
+16
+13
Feels like
+15
761 mmHg
69%
3.2
m/s
S
30 September, Monday. day, 16°; night, 13°; clear
1
+16
+13
1 October, tue
+16
+13
Feels like
+15
761 mmHg
70%
3.4
m/s
N
1 October, Tuesday. day, 16°; night, 13°; partly cloudy
2
+16
+12
2 October, wed
+16
+12
Feels like
+14
760 mmHg
69%
3.2
m/s
NE
2 October, Wednesday. day, 16°; night, 12°; clear
3
+16
+13
3 October, thu
+16
+13
Feels like
+15
759 mmHg
62%
3.2
m/s
N
3 October, Thursday. day, 16°; night, 13°; partly cloudy
4
+17
+12
4 October, fri
+17
+12
Feels like
+15
759 mmHg
63%
3.7
m/s
N
4 October, Friday. day, 17°; night, 12°; rain
5
+17
+13
5 October, sat
+17
+13
Feels like
+16
759 mmHg
62%
3.2
m/s
NE
5 October, Saturday. day, 17°; night, 13°; clear
Average data for 10 years
Issaquah September
18
sunny days
4
days with precipitation
8
cloudy days
18 sunny days; 4 days with precipitation; 8 cloudy days;
63
%
air humidity
2.2
m/s
Wind
NE
34
mm of precipitation
(5% of annual average)
air humidity 63%; 34 millimeters of precipitation (5% of annual average); Wind north-easterly 2.2 Meters per second
Weather graphs for September
Temperature
Precipitation chance, %
Humidity, %
Wind, m/s
Pressure, mmHg
NE
N
N
N
SE
N
N
NW
N
NE
N
N
N
E
NE
E
S
S
S
N
SE
SE
E
E
E
NE
NE
E
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
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