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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
31
+28
+14
31 August, sun
+28
+14
Feels like
+18
671 mmHg
55%
6.4
m/s
S
31 August, Sunday. day, 28°; night, 14°; clear
1
+28
+13
1 September, mon
+28
+13
Feels like
+18
671 mmHg
54%
5.7
m/s
S
1 September, Monday. day, 28°; night, 13°; clear
2
+28
+14
2 September, tue
+28
+14
Feels like
+17
671 mmHg
52%
5.9
m/s
SW
2 September, Tuesday. day, 28°; night, 14°; clear
3
+28
+13
3 September, wed
+28
+13
Feels like
+17
671 mmHg
50%
5.5
m/s
S
3 September, Wednesday. day, 28°; night, 13°; clear
4
+28
+13
4 September, thu
+28
+13
Feels like
+17
671 mmHg
52%
5.7
m/s
SW
4 September, Thursday. day, 28°; night, 13°; clear
5
+28
+13
5 September, fri
+28
+13
Feels like
+17
671 mmHg
52%
5.5
m/s
SW
5 September, Friday. day, 28°; night, 13°; clear
6
+27
+12
6 September, sat
+27
+12
Feels like
+16
671 mmHg
54%
5.9
m/s
SW
6 September, Saturday. day, 27°; night, 12°; rain
7
+25
+11
7 September, sun
+25
+11
Feels like
+15
672 mmHg
56%
5.8
m/s
SW
7 September, Sunday. day, 25°; night, 11°; clear
8
+25
+11
8 September, mon
+25
+11
Feels like
+14
672 mmHg
55%
6
m/s
SW
8 September, Monday. day, 25°; night, 11°; clear
9
+25
+11
9 September, tue
+25
+11
Feels like
+14
671 mmHg
57%
5.6
m/s
S
9 September, Tuesday. day, 25°; night, 11°; partly cloudy
10
+25
+10
10 September, wed
+25
+10
Feels like
+14
671 mmHg
57%
5.2
m/s
S
10 September, Wednesday. day, 25°; night, 10°; clear
11
+24
+11
11 September, thu
+24
+11
Feels like
+14
672 mmHg
58%
5.4
m/s
S
11 September, Thursday. day, 24°; night, 11°; overcast
12
+24
+10
12 September, fri
+24
+10
Feels like
+13
671 mmHg
57%
5.6
m/s
S
12 September, Friday. day, 24°; night, 10°; clear
13
+24
+10
13 September, sat
+24
+10
Feels like
+12
671 mmHg
58%
6.2
m/s
SW
13 September, Saturday. day, 24°; night, 10°; clear
14
+23
+10
14 September, sun
+23
+10
Feels like
+12
671 mmHg
58%
5.6
m/s
S
14 September, Sunday. day, 23°; night, 10°; clear
15
+24
+10
15 September, mon
+24
+10
Feels like
+13
670 mmHg
60%
5.1
m/s
S
15 September, Monday. day, 24°; night, 10°; rain
16
+25
+10
16 September, tue
+25
+10
Feels like
+14
670 mmHg
58%
5.6
m/s
S
16 September, Tuesday. day, 25°; night, 10°; clear
17
+25
+10
17 September, wed
+25
+10
Feels like
+13
669 mmHg
56%
5.7
m/s
SW
17 September, Wednesday. day, 25°; night, 10°; clear
18
+24
+10
18 September, thu
+24
+10
Feels like
+12
669 mmHg
58%
6
m/s
SW
18 September, Thursday. day, 24°; night, 10°; rain
19
+24
+10
19 September, fri
+24
+10
Feels like
+12
669 mmHg
56%
5.9
m/s
SW
19 September, Friday. day, 24°; night, 10°; rain
20
+22
+9
20 September, sat
+22
+9
Feels like
+10
669 mmHg
56%
6.6
m/s
SW
20 September, Saturday. day, 22°; night, 9°; rain
21
+20
+7
21 September, sun
+20
+7
Feels like
+9
671 mmHg
57%
6.2
m/s
SW
21 September, Sunday. day, 20°; night, 7°; partly cloudy
22
+20
+7
22 September, mon
+20
+7
Feels like
+9
671 mmHg
60%
5.7
m/s
S
22 September, Monday. day, 20°; night, 7°; partly cloudy
23
+20
+8
23 September, tue
+20
+8
Feels like
+9
670 mmHg
61%
6
m/s
SW
23 September, Tuesday. day, 20°; night, 8°; rain
24
+21
+7
24 September, wed
+21
+7
Feels like
+9
671 mmHg
58%
5.8
m/s
SW
24 September, Wednesday. day, 21°; night, 7°; clear
25
+22
+7
25 September, thu
+22
+7
Feels like
+10
671 mmHg
56%
5.6
m/s
SW
25 September, Thursday. day, 22°; night, 7°; clear
26
+23
+8
26 September, fri
+23
+8
Feels like
+11
670 mmHg
52%
5.7
m/s
SW
26 September, Friday. day, 23°; night, 8°; clear
27
+22
+8
27 September, sat
+22
+8
Feels like
+10
671 mmHg
54%
6
m/s
SW
27 September, Saturday. day, 22°; night, 8°; clear
28
+22
+7
28 September, sun
+22
+7
Feels like
+9
672 mmHg
55%
6.1
m/s
SW
28 September, Sunday. day, 22°; night, 7°; clear
29
+23
+9
29 September, mon
+23
+9
Feels like
+10
670 mmHg
52%
6.1
m/s
SW
29 September, Monday. day, 23°; night, 9°; clear
30
+22
+9
30 September, tue
+22
+9
Feels like
+10
670 mmHg
52%
6.1
m/s
SW
30 September, Tuesday. day, 22°; night, 9°; partly cloudy
1
+20
+7
1 October, wed
+20
+7
Feels like
+9
670 mmHg
57%
5.7
m/s
SW
1 October, Wednesday. day, 20°; night, 7°; rain
2
+19
+6
2 October, thu
+19
+6
Feels like
+7
670 mmHg
57%
5.9
m/s
SW
2 October, Thursday. day, 19°; night, 6°; partly cloudy
3
+17
+6
3 October, fri
+17
+6
Feels like
+6
670 mmHg
60%
6.3
m/s
SW
3 October, Friday. day, 17°; night, 6°; rain
4
+17
+4
4 October, sat
+17
+4
Feels like
+5
670 mmHg
66%
6.5
m/s
SW
4 October, Saturday. day, 17°; night, 4°; rain
Average data for 10 years
Rapid City September
19
sunny days
6
days with precipitation
3
cloudy days
19 sunny days; 6 days with precipitation; 3 cloudy days;
56
%
air humidity
3.5
m/s
Wind
SW
40
mm of precipitation
(7% of annual average)
air humidity 56%; 40 millimeters of precipitation (7% of annual average); Wind south-westerly 3.5 Meters per second
Weather graphs for September
Temperature
Precipitation chance, %
Humidity, %
Wind, m/s
Pressure, mmHg
S
SW
S
SW
SW
SW
SW
SW
S
S
S
S
SW
S
S
S
SW
SW
SW
SW
SW
S
SW
SW
SW
SW
SW
SW
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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