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September weather forecast in Rapid City
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
+26
+19
1 September, sun
+26
+19
Feels like
+22
668 mmHg
43%
8.3
m/s
SW
1 September, Sunday. day, 26°; night, 19°; clear
2
+25
+17
2 September, mon
+25
+17
Feels like
+21
669 mmHg
40%
6.6
m/s
NW
2 September, Monday. day, 25°; night, 17°; clear
3
+23
+17
3 September, tue
+23
+17
Feels like
+20
669 mmHg
41%
6.8
m/s
N
3 September, Tuesday. day, 23°; night, 17°; clear
4
+24
+18
4 September, wed
+24
+18
Feels like
+21
668 mmHg
44%
6.3
m/s
N
4 September, Wednesday. day, 24°; night, 18°; clear
5
+22
+17
5 September, thu
+22
+17
Feels like
+18
669 mmHg
46%
6.1
m/s
W
5 September, Thursday. day, 22°; night, 17°; clear
6
+23
+16
6 September, fri
+23
+16
Feels like
+20
669 mmHg
44%
5.8
m/s
NE
6 September, Friday. day, 23°; night, 16°; rain
7
+22
+17
7 September, sat
+22
+17
Feels like
+19
669 mmHg
46%
6
m/s
N
7 September, Saturday. day, 22°; night, 17°; rain
8
+22
+16
8 September, sun
+22
+16
Feels like
+19
669 mmHg
44%
6.4
m/s
NW
8 September, Sunday. day, 22°; night, 16°; clear
9
+21
+16
9 September, mon
+21
+16
Feels like
+18
670 mmHg
49%
6.3
m/s
W
9 September, Monday. day, 21°; night, 16°; partly cloudy
10
+21
+16
10 September, tue
+21
+16
Feels like
+18
671 mmHg
47%
5.5
m/s
NW
10 September, Tuesday. day, 21°; night, 16°; rain
11
+21
+15
11 September, wed
+21
+15
Feels like
+18
670 mmHg
49%
6.6
m/s
N
11 September, Wednesday. day, 21°; night, 15°; clear
12
+20
+14
12 September, thu
+20
+14
Feels like
+16
669 mmHg
50%
6.6
m/s
SE
12 September, Thursday. day, 20°; night, 14°; clear
13
+19
+13
13 September, fri
+19
+13
Feels like
+15
669 mmHg
56%
6.5
m/s
NW
13 September, Friday. day, 19°; night, 13°; clear
14
+18
+13
14 September, sat
+18
+13
Feels like
+14
670 mmHg
58%
7.1
m/s
SW
14 September, Saturday. day, 18°; night, 13°; partly cloudy
15
+21
+16
15 September, sun
+21
+16
Feels like
+19
669 mmHg
49%
5.4
m/s
S
15 September, Sunday. day, 21°; night, 16°; clear
16
+21
+14
16 September, mon
+21
+14
Feels like
+18
669 mmHg
46%
6.6
m/s
NE
16 September, Monday. day, 21°; night, 14°; partly cloudy
17
+21
+15
17 September, tue
+21
+15
Feels like
+17
668 mmHg
43%
7.3
m/s
SW
17 September, Tuesday. day, 21°; night, 15°; clear
18
+22
+15
18 September, wed
+22
+15
Feels like
+18
667 mmHg
40%
7.3
m/s
W
18 September, Wednesday. day, 22°; night, 15°; clear
19
+22
+15
19 September, thu
+22
+15
Feels like
+17
668 mmHg
36%
8.1
m/s
NW
19 September, Thursday. day, 22°; night, 15°; rain
20
+21
+15
20 September, fri
+21
+15
Feels like
+16
668 mmHg
38%
7.5
m/s
NW
20 September, Friday. day, 21°; night, 15°; clear
21
+20
+14
21 September, sat
+20
+14
Feels like
+16
667 mmHg
49%
6.8
m/s
NW
21 September, Saturday. day, 20°; night, 14°; clear
22
+17
+12
22 September, sun
+17
+12
Feels like
+14
668 mmHg
58%
6.1
m/s
N
22 September, Sunday. day, 17°; night, 12°; rain
23
+19
+14
23 September, mon
+19
+14
Feels like
+16
670 mmHg
49%
6
m/s
NE
23 September, Monday. day, 19°; night, 14°; clear
24
+20
+15
24 September, tue
+20
+15
Feels like
+16
669 mmHg
47%
6.8
m/s
S
24 September, Tuesday. day, 20°; night, 15°; clear
25
+23
+17
25 September, wed
+23
+17
Feels like
+19
668 mmHg
38%
6.3
m/s
SW
25 September, Wednesday. day, 23°; night, 17°; clear
26
+20
+14
26 September, thu
+20
+14
Feels like
+15
669 mmHg
40%
7.3
m/s
NW
26 September, Thursday. day, 20°; night, 14°; clear
27
+19
+14
27 September, fri
+19
+14
Feels like
+15
670 mmHg
46%
6.5
m/s
W
27 September, Friday. day, 19°; night, 14°; partly cloudy
28
+18
+13
28 September, sat
+18
+13
Feels like
+13
671 mmHg
50%
7.1
m/s
S
28 September, Saturday. day, 18°; night, 13°; clear
29
+21
+14
29 September, sun
+21
+14
Feels like
+17
667 mmHg
46%
7
m/s
SW
29 September, Sunday. day, 21°; night, 14°; clear
30
+18
+12
30 September, mon
+18
+12
Feels like
+13
668 mmHg
47%
7.8
m/s
NW
30 September, Monday. day, 18°; night, 12°; clear
1
+16
+10
1 October, tue
+16
+10
Feels like
+11
669 mmHg
50%
7.5
m/s
W
1 October, Tuesday. day, 16°; night, 10°; clear
2
+15
+10
2 October, wed
+15
+10
Feels like
+11
668 mmHg
51%
6.8
m/s
N
2 October, Wednesday. day, 15°; night, 10°; clear
3
+14
+10
3 October, thu
+14
+10
Feels like
+9
667 mmHg
63%
7.8
m/s
W
3 October, Thursday. day, 14°; night, 10°; rain
4
+13
+9
4 October, fri
+13
+9
Feels like
+8
667 mmHg
62%
8.6
m/s
NW
4 October, Friday. day, 13°; night, 9°; partly cloudy
5
+13
+9
5 October, sat
+13
+9
Feels like
+10
667 mmHg
63%
6.5
m/s
W
5 October, Saturday. day, 13°; night, 9°; rain
Average data for 10 years
Rapid City September
21
sunny days
5
days with precipitation
4
cloudy days
21 sunny days; 5 days with precipitation; 4 cloudy days;
46
%
air humidity
4.8
m/s
Wind
W
45
mm of precipitation
(7% of annual average)
air humidity 46%; 45 millimeters of precipitation (7% of annual average); Wind westerly 4.8 Meters per second
Weather graphs for September
Temperature
Precipitation chance, %
Humidity, %
Wind, m/s
Pressure, mmHg
SW
NW
N
N
W
NE
N
NW
W
NW
N
SE
NW
SW
S
NE
SW
W
NW
NW
NW
N
NE
S
SW
NW
W
S
SW
NW
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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