10 day forecast
Monthly forecast
Weather map
City or area
Find
Sign up
Log in
Go to comparison
September weather forecast in Big Sky
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
+18
+10
1 September, sun
+18
+10
Feels like
+15
599 mmHg
50%
4.5
m/s
SW
1 September, Sunday. day, 18°; night, 10°; partly cloudy
2
+18
+11
2 September, mon
+18
+11
Feels like
+15
600 mmHg
43%
4
m/s
SW
2 September, Monday. day, 18°; night, 11°; partly cloudy
3
+17
+10
3 September, tue
+17
+10
Feels like
+14
600 mmHg
46%
3.7
m/s
S
3 September, Tuesday. day, 17°; night, 10°; partly cloudy
4
+14
+8
4 September, wed
+14
+8
Feels like
+11
599 mmHg
50%
4
m/s
W
4 September, Wednesday. day, 14°; night, 8°; rain
5
+16
+9
5 September, thu
+16
+9
Feels like
+12
600 mmHg
43%
4.6
m/s
SW
5 September, Thursday. day, 16°; night, 9°; clear
6
+16
+9
6 September, fri
+16
+9
Feels like
+12
600 mmHg
46%
3.9
m/s
SW
6 September, Friday. day, 16°; night, 9°; clear
7
+16
+9
7 September, sat
+16
+9
Feels like
+12
600 mmHg
50%
4.9
m/s
SW
7 September, Saturday. day, 16°; night, 9°; partly cloudy
8
+16
+8
8 September, sun
+16
+8
Feels like
+13
599 mmHg
46%
4.4
m/s
SW
8 September, Sunday. day, 16°; night, 8°; clear
9
+16
+9
9 September, mon
+16
+9
Feels like
+13
600 mmHg
44%
4.5
m/s
W
9 September, Monday. day, 16°; night, 9°; partly cloudy
10
+16
+8
10 September, tue
+16
+8
Feels like
+12
601 mmHg
43%
4.5
m/s
W
10 September, Tuesday. day, 16°; night, 8°; rain
11
+17
+8
11 September, wed
+17
+8
Feels like
+13
601 mmHg
41%
4.4
m/s
S
11 September, Wednesday. day, 17°; night, 8°; rain
12
+15
+9
12 September, thu
+15
+9
Feels like
+12
599 mmHg
49%
4.5
m/s
SW
12 September, Thursday. day, 15°; night, 9°; clear
13
+14
+7
13 September, fri
+14
+7
Feels like
+10
599 mmHg
56%
4.1
m/s
S
13 September, Friday. day, 14°; night, 7°; partly cloudy
14
+14
+8
14 September, sat
+14
+8
Feels like
+12
599 mmHg
57%
4
m/s
S
14 September, Saturday. day, 14°; night, 8°; rain
15
+14
+9
15 September, sun
+14
+9
Feels like
+11
599 mmHg
57%
4.5
m/s
S
15 September, Sunday. day, 14°; night, 9°; clear
16
+14
+8
16 September, mon
+14
+8
Feels like
+12
599 mmHg
60%
4.6
m/s
S
16 September, Monday. day, 14°; night, 8°; rain
17
+14
+8
17 September, tue
+14
+8
Feels like
+11
599 mmHg
56%
4.5
m/s
SW
17 September, Tuesday. day, 14°; night, 8°; rain
18
+15
+8
18 September, wed
+15
+8
Feels like
+11
598 mmHg
50%
5.5
m/s
SW
18 September, Wednesday. day, 15°; night, 8°; partly cloudy
19
+14
+8
19 September, thu
+14
+8
Feels like
+10
599 mmHg
50%
4.6
m/s
SW
19 September, Thursday. day, 14°; night, 8°; clear
20
+14
+8
20 September, fri
+14
+8
Feels like
+11
599 mmHg
50%
4
m/s
SW
20 September, Friday. day, 14°; night, 8°; partly cloudy
21
+13
+7
21 September, sat
+13
+7
Feels like
+9
598 mmHg
61%
4.3
m/s
S
21 September, Saturday. day, 13°; night, 7°; rain
22
+14
+7
22 September, sun
+14
+7
Feels like
+11
599 mmHg
60%
3.9
m/s
SW
22 September, Sunday. day, 14°; night, 7°; partly cloudy
23
+14
+8
23 September, mon
+14
+8
Feels like
+10
600 mmHg
51%
4.4
m/s
S
23 September, Monday. day, 14°; night, 8°; clear
24
+15
+9
24 September, tue
+15
+9
Feels like
+11
599 mmHg
50%
4
m/s
S
24 September, Tuesday. day, 15°; night, 9°; rain
25
+15
+8
25 September, wed
+15
+8
Feels like
+11
599 mmHg
54%
5.3
m/s
SW
25 September, Wednesday. day, 15°; night, 8°; clear
26
+14
+7
26 September, thu
+14
+7
Feels like
+11
601 mmHg
50%
3.7
m/s
S
26 September, Thursday. day, 14°; night, 7°; clear
27
+15
+9
27 September, fri
+15
+9
Feels like
+11
600 mmHg
50%
4.8
m/s
S
27 September, Friday. day, 15°; night, 9°; rain
28
+15
+8
28 September, sat
+15
+8
Feels like
+11
599 mmHg
47%
5
m/s
S
28 September, Saturday. day, 15°; night, 8°; clear
29
+13
+7
29 September, sun
+13
+7
Feels like
+9
598 mmHg
61%
4.9
m/s
SW
29 September, Sunday. day, 13°; night, 7°; clear
30
+11
+5
30 September, mon
+11
+5
Feels like
+8
600 mmHg
61%
4
m/s
S
30 September, Monday. day, 11°; night, 5°; clear
1
+10
+4
1 October, tue
+10
+4
Feels like
+7
599 mmHg
61%
4.5
m/s
SW
1 October, Tuesday. day, 10°; night, 4°; rain
2
+10
+3
2 October, wed
+10
+3
Feels like
+6
598 mmHg
58%
5.1
m/s
SE
2 October, Wednesday. day, 10°; night, 3°; partly cloudy
3
+6
+1
3 October, thu
+6
+1
Feels like
+1
597 mmHg
75%
5
m/s
E
3 October, Thursday. day, 6°; night, 1°; clear
4
+6
+2
4 October, fri
+6
+2
Feels like
+2
597 mmHg
76%
4.6
m/s
SW
4 October, Friday. day, 6°; night, 2°; overcast
5
+8
+2
5 October, sat
+8
+2
Feels like
+4
598 mmHg
68%
4.9
m/s
SW
5 October, Saturday. day, 8°; night, 2°; partly cloudy
Average data for 10 years
Big Sky September
12
sunny days
9
days with precipitation
9
cloudy days
12 sunny days; 9 days with precipitation; 9 cloudy days;
50
%
air humidity
3
m/s
Wind
SW
87
mm of precipitation
(9% of annual average)
air humidity 50%; 87 millimeters of precipitation (9% of annual average); Wind south-westerly 3 Meters per second
Weather graphs for September
Temperature
Precipitation chance, %
Humidity, %
Wind, m/s
Pressure, mmHg
SW
SW
S
W
SW
SW
SW
SW
W
W
S
SW
S
S
S
S
SW
SW
SW
SW
S
SW
S
S
SW
S
S
S
SW
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
Cities near you
Bozeman
West Yellowstone
Helena
Billings
Great Falls
Jackson
Idaho Falls
Butte
Lander
Cities with similar weather in September
Minsk
Mogilev
Helsinki
Riga
Karlovy Vary
Tallinn
Vitebsk
Petropavlovsk
Stockholm
