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September weather forecast in Helena
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
+25
+8
31 August, sun
+25
+8
Feels like
+12
627 mmHg
47%
4.4
m/s
SW
31 August, Sunday. day, 25°; night, 8°; clear
1
+24
+8
1 September, mon
+24
+8
Feels like
+12
627 mmHg
48%
4.4
m/s
SW
1 September, Monday. day, 24°; night, 8°; clear
2
+25
+8
2 September, tue
+25
+8
Feels like
+12
628 mmHg
46%
4.5
m/s
SW
2 September, Tuesday. day, 25°; night, 8°; clear
3
+25
+8
3 September, wed
+25
+8
Feels like
+13
628 mmHg
45%
4.19
m/s
SW
3 September, Wednesday. day, 25°; night, 8°; clear
4
+24
+8
4 September, thu
+24
+8
Feels like
+12
628 mmHg
51%
3.9
m/s
SW
4 September, Thursday. day, 24°; night, 8°; partly cloudy
5
+23
+8
5 September, fri
+23
+8
Feels like
+12
628 mmHg
52%
4.1
m/s
SW
5 September, Friday. day, 23°; night, 8°; rain
6
+23
+7
6 September, sat
+23
+7
Feels like
+11
629 mmHg
54%
4
m/s
SW
6 September, Saturday. day, 23°; night, 7°; partly cloudy
7
+22
+8
7 September, sun
+22
+8
Feels like
+11
629 mmHg
54%
4
m/s
SW
7 September, Sunday. day, 22°; night, 8°; rain
8
+22
+7
8 September, mon
+22
+7
Feels like
+10
628 mmHg
52%
4.5
m/s
SW
8 September, Monday. day, 22°; night, 7°; clear
9
+21
+7
9 September, tue
+21
+7
Feels like
+10
627 mmHg
54%
4.1
m/s
SW
9 September, Tuesday. day, 21°; night, 7°; clear
10
+21
+7
10 September, wed
+21
+7
Feels like
+10
627 mmHg
54%
4.1
m/s
SW
10 September, Wednesday. day, 21°; night, 7°; clear
11
+21
+6
11 September, thu
+21
+6
Feels like
+9
628 mmHg
56%
4.19
m/s
S
11 September, Thursday. day, 21°; night, 6°; clear
12
+21
+6
12 September, fri
+21
+6
Feels like
+9
628 mmHg
55%
4.1
m/s
SW
12 September, Friday. day, 21°; night, 6°; clear
13
+21
+6
13 September, sat
+21
+6
Feels like
+9
627 mmHg
55%
4
m/s
S
13 September, Saturday. day, 21°; night, 6°; clear
14
+21
+5
14 September, sun
+21
+5
Feels like
+9
627 mmHg
58%
3.7
m/s
S
14 September, Sunday. day, 21°; night, 5°; partly cloudy
15
+21
+6
15 September, mon
+21
+6
Feels like
+10
626 mmHg
57%
3.7
m/s
S
15 September, Monday. day, 21°; night, 6°; partly cloudy
16
+20
+6
16 September, tue
+20
+6
Feels like
+9
626 mmHg
58%
4.19
m/s
SW
16 September, Tuesday. day, 20°; night, 6°; rain
17
+19
+5
17 September, wed
+19
+5
Feels like
+8
626 mmHg
58%
3.9
m/s
SW
17 September, Wednesday. day, 19°; night, 5°; overcast
18
+19
+6
18 September, thu
+19
+6
Feels like
+8
625 mmHg
60%
4.8
m/s
SW
18 September, Thursday. day, 19°; night, 6°; partly cloudy
19
+18
+6
19 September, fri
+18
+6
Feels like
+7
626 mmHg
63%
4.8
m/s
SW
19 September, Friday. day, 18°; night, 6°; rain
20
+17
+4
20 September, sat
+17
+4
Feels like
+6
626 mmHg
60%
4.6
m/s
SW
20 September, Saturday. day, 17°; night, 4°; partly cloudy
21
+17
+3
21 September, sun
+17
+3
Feels like
+5
627 mmHg
60%
4.3
m/s
S
21 September, Sunday. day, 17°; night, 3°; rain
22
+17
+4
22 September, mon
+17
+4
Feels like
+6
626 mmHg
60%
4.19
m/s
SW
22 September, Monday. day, 17°; night, 4°; rain
23
+18
+4
23 September, tue
+18
+4
Feels like
+6
627 mmHg
58%
4.4
m/s
SW
23 September, Tuesday. day, 18°; night, 4°; partly cloudy
24
+19
+4
24 September, wed
+19
+4
Feels like
+6
627 mmHg
56%
3.9
m/s
SW
24 September, Wednesday. day, 19°; night, 4°; clear
25
+20
+5
25 September, thu
+20
+5
Feels like
+7
627 mmHg
54%
4.4
m/s
SW
25 September, Thursday. day, 20°; night, 5°; clear
26
+19
+6
26 September, fri
+19
+6
Feels like
+8
627 mmHg
54%
4.6
m/s
SW
26 September, Friday. day, 19°; night, 6°; clear
27
+19
+4
27 September, sat
+19
+4
Feels like
+7
627 mmHg
58%
4.4
m/s
SW
27 September, Saturday. day, 19°; night, 4°; clear
28
+18
+4
28 September, sun
+18
+4
Feels like
+6
627 mmHg
58%
4.4
m/s
S
28 September, Sunday. day, 18°; night, 4°; clear
29
+18
+4
29 September, mon
+18
+4
Feels like
+6
626 mmHg
55%
4.5
m/s
SW
29 September, Monday. day, 18°; night, 4°; clear
30
+17
+4
30 September, tue
+17
+4
Feels like
+5
626 mmHg
60%
4.5
m/s
SW
30 September, Tuesday. day, 17°; night, 4°; rain
1
+16
+3
1 October, wed
+16
+3
Feels like
+5
626 mmHg
61%
4.4
m/s
S
1 October, Wednesday. day, 16°; night, 3°; rain
2
+15
+3
2 October, thu
+15
+3
Feels like
+4
626 mmHg
63%
4.19
m/s
SW
2 October, Thursday. day, 15°; night, 3°; clear
3
+14
+2
3 October, fri
+14
+2
Feels like
+3
626 mmHg
63%
4.19
m/s
S
3 October, Friday. day, 14°; night, 2°; rain
4
+13
+2
4 October, sat
+13
+2
Feels like
+3
626 mmHg
65%
4.3
m/s
S
4 October, Saturday. day, 13°; night, 2°; rain
Average data for 10 years
Helena September
15
sunny days
7
days with precipitation
3
cloudy days
15 sunny days; 7 days with precipitation; 3 cloudy days;
56
%
air humidity
2.4
m/s
Wind
SW
40
mm of precipitation
(8% of annual average)
air humidity 56%; 40 millimeters of precipitation (8% of annual average); Wind south-westerly 2.4 Meters per second
Weather graphs for September
Temperature
Precipitation chance, %
Humidity, %
Wind, m/s
Pressure, mmHg
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
S
SW
S
S
S
SW
SW
SW
SW
SW
S
SW
SW
SW
SW
SW
SW
S
SW
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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