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September weather forecast in Boise
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
31
+26
+21
31 August, sun
+26
+21
Feels like
+23
677 mmHg
27%
5.6
m/s
NW
31 August, Sunday. day, 26°; night, 21°; clear
1
+27
+21
1 September, mon
+27
+21
Feels like
+23
678 mmHg
25%
5.3
m/s
NW
1 September, Monday. day, 27°; night, 21°; clear
2
+25
+20
2 September, tue
+25
+20
Feels like
+21
679 mmHg
28%
4.4
m/s
N
2 September, Tuesday. day, 25°; night, 20°; partly cloudy
3
+26
+20
3 September, wed
+26
+20
Feels like
+23
678 mmHg
25%
4.5
m/s
N
3 September, Wednesday. day, 26°; night, 20°; clear
4
+23
+18
4 September, thu
+23
+18
Feels like
+19
677 mmHg
28%
5
m/s
NW
4 September, Thursday. day, 23°; night, 18°; clear
5
+24
+20
5 September, fri
+24
+20
Feels like
+21
679 mmHg
30%
3.9
m/s
NW
5 September, Friday. day, 24°; night, 20°; rain
6
+25
+20
6 September, sat
+25
+20
Feels like
+21
678 mmHg
23%
5
m/s
N
6 September, Saturday. day, 25°; night, 20°; clear
7
+25
+19
7 September, sun
+25
+19
Feels like
+22
678 mmHg
30%
4.3
m/s
NW
7 September, Sunday. day, 25°; night, 19°; clear
8
+25
+19
8 September, mon
+25
+19
Feels like
+22
678 mmHg
28%
5.4
m/s
NW
8 September, Monday. day, 25°; night, 19°; clear
9
+26
+20
9 September, tue
+26
+20
Feels like
+23
679 mmHg
25%
4.5
m/s
NW
9 September, Tuesday. day, 26°; night, 20°; clear
10
+26
+21
10 September, wed
+26
+21
Feels like
+22
679 mmHg
23%
4.9
m/s
N
10 September, Wednesday. day, 26°; night, 21°; clear
11
+26
+20
11 September, thu
+26
+20
Feels like
+22
679 mmHg
25%
4.8
m/s
E
11 September, Thursday. day, 26°; night, 20°; clear
12
+26
+20
12 September, fri
+26
+20
Feels like
+23
676 mmHg
25%
4.6
m/s
NW
12 September, Friday. day, 26°; night, 20°; clear
13
+24
+18
13 September, sat
+24
+18
Feels like
+20
676 mmHg
30%
5.5
m/s
NW
13 September, Saturday. day, 24°; night, 18°; clear
14
+24
+18
14 September, sun
+24
+18
Feels like
+21
677 mmHg
34%
4.9
m/s
SE
14 September, Sunday. day, 24°; night, 18°; partly cloudy
15
+24
+19
15 September, mon
+24
+19
Feels like
+21
678 mmHg
34%
4.4
m/s
NE
15 September, Monday. day, 24°; night, 19°; clear
16
+23
+18
16 September, tue
+23
+18
Feels like
+20
677 mmHg
31%
4.8
m/s
N
16 September, Tuesday. day, 23°; night, 18°; clear
17
+23
+18
17 September, wed
+23
+18
Feels like
+20
678 mmHg
34%
4
m/s
N
17 September, Wednesday. day, 23°; night, 18°; clear
18
+23
+18
18 September, thu
+23
+18
Feels like
+20
678 mmHg
34%
4.8
m/s
NW
18 September, Thursday. day, 23°; night, 18°; clear
19
+24
+18
19 September, fri
+24
+18
Feels like
+20
678 mmHg
34%
5.5
m/s
NW
19 September, Friday. day, 24°; night, 18°; clear
20
+21
+16
20 September, sat
+21
+16
Feels like
+18
677 mmHg
33%
4.5
m/s
NW
20 September, Saturday. day, 21°; night, 16°; partly cloudy
21
+21
+17
21 September, sun
+21
+17
Feels like
+18
677 mmHg
40%
4.1
m/s
NW
21 September, Sunday. day, 21°; night, 17°; partly cloudy
22
+22
+17
22 September, mon
+22
+17
Feels like
+19
678 mmHg
37%
4.5
m/s
NE
22 September, Monday. day, 22°; night, 17°; clear
23
+23
+17
23 September, tue
+23
+17
Feels like
+19
678 mmHg
37%
5
m/s
N
23 September, Tuesday. day, 23°; night, 17°; clear
24
+22
+17
24 September, wed
+22
+17
Feels like
+19
678 mmHg
34%
5
m/s
NW
24 September, Wednesday. day, 22°; night, 17°; partly cloudy
25
+22
+17
25 September, thu
+22
+17
Feels like
+19
679 mmHg
34%
4.9
m/s
NW
25 September, Thursday. day, 22°; night, 17°; clear
26
+22
+18
26 September, fri
+22
+18
Feels like
+19
679 mmHg
34%
3.9
m/s
N
26 September, Friday. day, 22°; night, 18°; clear
27
+23
+19
27 September, sat
+23
+19
Feels like
+20
678 mmHg
31%
4.5
m/s
NE
27 September, Saturday. day, 23°; night, 19°; clear
28
+23
+18
28 September, sun
+23
+18
Feels like
+20
677 mmHg
34%
5.1
m/s
NE
28 September, Sunday. day, 23°; night, 18°; clear
29
+22
+16
29 September, mon
+22
+16
Feels like
+18
678 mmHg
37%
5.5
m/s
NW
29 September, Monday. day, 22°; night, 16°; clear
30
+21
+15
30 September, tue
+21
+15
Feels like
+17
679 mmHg
37%
5.6
m/s
N
30 September, Tuesday. day, 21°; night, 15°; clear
1
+20
+15
1 October, wed
+20
+15
Feels like
+17
679 mmHg
34%
4.3
m/s
N
1 October, Wednesday. day, 20°; night, 15°; clear
2
+18
+13
2 October, thu
+18
+13
Feels like
+15
677 mmHg
37%
5.3
m/s
NW
2 October, Thursday. day, 18°; night, 13°; partly cloudy
3
+15
+12
3 October, fri
+15
+12
Feels like
+11
677 mmHg
54%
5.4
m/s
NW
3 October, Friday. day, 15°; night, 12°; clear
4
+15
+12
4 October, sat
+15
+12
Feels like
+12
678 mmHg
50%
3.9
m/s
NW
4 October, Saturday. day, 15°; night, 12°; partly cloudy
Average data for 10 years
Boise September
24
sunny days
1
day with precipitation
5
cloudy days
24 sunny days; 1 day with precipitation; 5 cloudy days;
31
%
air humidity
3.2
m/s
Wind
NW
13
mm of precipitation
(3% of annual average)
air humidity 31%; 13 millimeters of precipitation (3% of annual average); Wind north-westerly 3.2 Meters per second
Weather graphs for September
Temperature
Precipitation chance, %
Humidity, %
Wind, m/s
Pressure, mmHg
NW
N
N
NW
NW
N
NW
NW
NW
N
E
NW
NW
SE
NE
N
N
NW
NW
NW
NW
NE
N
NW
NW
N
NE
NE
NW
N
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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