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September weather forecast in Great Falls
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
+25
+18
1 September, sun
+25
+18
Feels like
+21
671 mmHg
33%
7.8
m/s
W
1 September, Sunday. day, 25°; night, 18°; partly cloudy
2
+23
+16
2 September, mon
+23
+16
Feels like
+19
673 mmHg
33%
7.1
m/s
W
2 September, Monday. day, 23°; night, 16°; partly cloudy
3
+23
+17
3 September, tue
+23
+17
Feels like
+19
673 mmHg
36%
5.8
m/s
W
3 September, Tuesday. day, 23°; night, 17°; clear
4
+20
+15
4 September, wed
+20
+15
Feels like
+17
673 mmHg
43%
5.9
m/s
NW
4 September, Wednesday. day, 20°; night, 15°; rain
5
+22
+15
5 September, thu
+22
+15
Feels like
+18
673 mmHg
38%
6.5
m/s
W
5 September, Thursday. day, 22°; night, 15°; clear
6
+21
+15
6 September, fri
+21
+15
Feels like
+17
673 mmHg
41%
5.6
m/s
W
6 September, Friday. day, 21°; night, 15°; clear
7
+22
+15
7 September, sat
+22
+15
Feels like
+18
673 mmHg
38%
7
m/s
W
7 September, Saturday. day, 22°; night, 15°; rain
8
+21
+15
8 September, sun
+21
+15
Feels like
+17
672 mmHg
41%
6.8
m/s
W
8 September, Sunday. day, 21°; night, 15°; partly cloudy
9
+22
+15
9 September, mon
+22
+15
Feels like
+18
674 mmHg
38%
6.6
m/s
W
9 September, Monday. day, 22°; night, 15°; clear
10
+22
+15
10 September, tue
+22
+15
Feels like
+17
675 mmHg
38%
7.6
m/s
W
10 September, Tuesday. day, 22°; night, 15°; clear
11
+23
+15
11 September, wed
+23
+15
Feels like
+19
673 mmHg
36%
6.9
m/s
SW
11 September, Wednesday. day, 23°; night, 15°; clear
12
+20
+13
12 September, thu
+20
+13
Feels like
+16
672 mmHg
38%
5.9
m/s
N
12 September, Thursday. day, 20°; night, 13°; clear
13
+18
+12
13 September, fri
+18
+12
Feels like
+15
674 mmHg
50%
5.8
m/s
N
13 September, Friday. day, 18°; night, 12°; partly cloudy
14
+22
+16
14 September, sat
+22
+16
Feels like
+18
673 mmHg
43%
6.8
m/s
SW
14 September, Saturday. day, 22°; night, 16°; partly cloudy
15
+21
+15
15 September, sun
+21
+15
Feels like
+18
672 mmHg
41%
6.4
m/s
SW
15 September, Sunday. day, 21°; night, 15°; clear
16
+21
+15
16 September, mon
+21
+15
Feels like
+17
672 mmHg
41%
6.9
m/s
SW
16 September, Monday. day, 21°; night, 15°; clear
17
+20
+15
17 September, tue
+20
+15
Feels like
+15
671 mmHg
43%
7.6
m/s
SW
17 September, Tuesday. day, 20°; night, 15°; clear
18
+21
+14
18 September, wed
+21
+14
Feels like
+16
670 mmHg
37%
8.6
m/s
W
18 September, Wednesday. day, 21°; night, 14°; clear
19
+21
+15
19 September, thu
+21
+15
Feels like
+16
671 mmHg
38%
7.5
m/s
SW
19 September, Thursday. day, 21°; night, 15°; clear
20
+20
+14
20 September, fri
+20
+14
Feels like
+16
672 mmHg
34%
6.5
m/s
SW
20 September, Friday. day, 20°; night, 14°; partly cloudy
21
+19
+14
21 September, sat
+19
+14
Feels like
+15
672 mmHg
47%
6.9
m/s
SW
21 September, Saturday. day, 19°; night, 14°; partly cloudy
22
+21
+15
22 September, sun
+21
+15
Feels like
+17
672 mmHg
43%
7.4
m/s
SW
22 September, Sunday. day, 21°; night, 15°; partly cloudy
23
+22
+16
23 September, mon
+22
+16
Feels like
+18
672 mmHg
38%
7
m/s
SW
23 September, Monday. day, 22°; night, 16°; clear
24
+23
+17
24 September, tue
+23
+17
Feels like
+19
672 mmHg
36%
6.3
m/s
SW
24 September, Tuesday. day, 23°; night, 17°; partly cloudy
25
+22
+15
25 September, wed
+22
+15
Feels like
+17
672 mmHg
36%
7.6
m/s
W
25 September, Wednesday. day, 22°; night, 15°; clear
26
+19
+14
26 September, thu
+19
+14
Feels like
+15
675 mmHg
43%
7
m/s
SW
26 September, Thursday. day, 19°; night, 14°; clear
27
+20
+14
27 September, fri
+20
+14
Feels like
+15
673 mmHg
38%
7.9
m/s
SW
27 September, Friday. day, 20°; night, 14°; clear
28
+21
+15
28 September, sat
+21
+15
Feels like
+17
672 mmHg
37%
6.6
m/s
SW
28 September, Saturday. day, 21°; night, 15°; rain
29
+20
+14
29 September, sun
+20
+14
Feels like
+14
670 mmHg
38%
8.5
m/s
W
29 September, Sunday. day, 20°; night, 14°; partly cloudy
30
+18
+12
30 September, mon
+18
+12
Feels like
+13
673 mmHg
40%
6.8
m/s
SW
30 September, Monday. day, 18°; night, 12°; clear
1
+17
+12
1 October, tue
+17
+12
Feels like
+13
673 mmHg
46%
7
m/s
W
1 October, Tuesday. day, 17°; night, 12°; partly cloudy
2
+15
+9
2 October, wed
+15
+9
Feels like
+10
673 mmHg
47%
8.3
m/s
NW
2 October, Wednesday. day, 15°; night, 9°; clear
3
+12
+8
3 October, thu
+12
+8
Feels like
+8
673 mmHg
61%
6.6
m/s
W
3 October, Thursday. day, 12°; night, 8°; rain
4
+13
+8
4 October, fri
+13
+8
Feels like
+9
672 mmHg
63%
5.8
m/s
W
4 October, Friday. day, 13°; night, 8°; clear
5
+15
+10
5 October, sat
+15
+10
Feels like
+9
671 mmHg
54%
8.3
m/s
SW
5 October, Saturday. day, 15°; night, 10°; partly cloudy
Average data for 10 years
Great Falls September
17
sunny days
3
days with precipitation
10
cloudy days
17 sunny days; 3 days with precipitation; 10 cloudy days;
40
%
air humidity
5
m/s
Wind
SW
25
mm of precipitation
(6% of annual average)
air humidity 40%; 25 millimeters of precipitation (6% of annual average); Wind south-westerly 5 Meters per second
Weather graphs for September
Temperature
Precipitation chance, %
Humidity, %
Wind, m/s
Pressure, mmHg
W
W
W
NW
W
W
W
W
W
W
SW
N
N
SW
SW
SW
SW
W
SW
SW
SW
SW
SW
SW
W
SW
SW
SW
W
SW
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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