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September weather forecast in Keystone
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
+14
+7
1 September, sun
+14
+7
Feels like
+11
509 mmHg
60%
4.4
m/s
SW
1 September, Sunday. day, 14°; night, 7°; rain
2
+13
+7
2 September, mon
+13
+7
Feels like
+10
509 mmHg
58%
5
m/s
S
2 September, Monday. day, 13°; night, 7°; rain
3
+13
+6
3 September, tue
+13
+6
Feels like
+9
509 mmHg
56%
5.5
m/s
W
3 September, Tuesday. day, 13°; night, 6°; rain
4
+12
+7
4 September, wed
+12
+7
Feels like
+9
508 mmHg
52%
5.3
m/s
SW
4 September, Wednesday. day, 12°; night, 7°; clear
5
+12
+6
5 September, thu
+12
+6
Feels like
+8
508 mmHg
54%
4.9
m/s
W
5 September, Thursday. day, 12°; night, 6°; rain
6
+12
+6
6 September, fri
+12
+6
Feels like
+8
508 mmHg
54%
4.4
m/s
SW
6 September, Friday. day, 12°; night, 6°; clear
7
+11
+5
7 September, sat
+11
+5
Feels like
+7
508 mmHg
62%
5
m/s
W
7 September, Saturday. day, 11°; night, 5°; rain
8
+12
+5
8 September, sun
+12
+5
Feels like
+8
508 mmHg
56%
4.5
m/s
SW
8 September, Sunday. day, 12°; night, 5°; clear
9
+11
+5
9 September, mon
+11
+5
Feels like
+7
508 mmHg
56%
4.5
m/s
SW
9 September, Monday. day, 11°; night, 5°; rain
10
+11
+5
10 September, tue
+11
+5
Feels like
+7
509 mmHg
54%
5.5
m/s
W
10 September, Tuesday. day, 11°; night, 5°; rain
11
+11
+5
11 September, wed
+11
+5
Feels like
+7
508 mmHg
62%
5
m/s
SW
11 September, Wednesday. day, 11°; night, 5°; clear
12
+10
+4
12 September, thu
+10
+4
Feels like
+6
507 mmHg
61%
5.3
m/s
W
12 September, Thursday. day, 10°; night, 4°; clear
13
+10
+4
13 September, fri
+10
+4
Feels like
+6
507 mmHg
62%
5.4
m/s
SW
13 September, Friday. day, 10°; night, 4°; rain
14
+9
+4
14 September, sat
+9
+4
Feels like
+5
507 mmHg
62%
5
m/s
SW
14 September, Saturday. day, 9°; night, 4°; rain
15
+10
+4
15 September, sun
+10
+4
Feels like
+7
508 mmHg
56%
4
m/s
SW
15 September, Sunday. day, 10°; night, 4°; clear
16
+11
+5
16 September, mon
+11
+5
Feels like
+8
508 mmHg
52%
4.4
m/s
SW
16 September, Monday. day, 11°; night, 5°; rain
17
+10
+4
17 September, tue
+10
+4
Feels like
+6
507 mmHg
57%
4.8
m/s
SW
17 September, Tuesday. day, 10°; night, 4°; partly cloudy
18
+11
+4
18 September, wed
+11
+4
Feels like
+6
507 mmHg
51%
5.5
m/s
W
18 September, Wednesday. day, 11°; night, 4°; rain
19
+11
+4
19 September, thu
+11
+4
Feels like
+6
508 mmHg
50%
5.4
m/s
W
19 September, Thursday. day, 11°; night, 4°; clear
20
+10
+4
20 September, fri
+10
+4
Feels like
+6
507 mmHg
55%
5.4
m/s
W
20 September, Friday. day, 10°; night, 4°; rain
21
+8
+3
21 September, sat
+8
+3
Feels like
+4
506 mmHg
61%
5
m/s
SW
21 September, Saturday. day, 8°; night, 3°; clear
22
+8
+3
22 September, sun
+8
+3
Feels like
+4
506 mmHg
63%
5.3
m/s
W
22 September, Sunday. day, 8°; night, 3°; clear
23
+9
+3
23 September, mon
+9
+3
Feels like
+5
508 mmHg
51%
4.6
m/s
SW
23 September, Monday. day, 9°; night, 3°; clear
24
+9
+3
24 September, tue
+9
+3
Feels like
+5
507 mmHg
51%
4.9
m/s
SW
24 September, Tuesday. day, 9°; night, 3°; partly cloudy
25
+10
+5
25 September, wed
+10
+5
Feels like
+6
508 mmHg
50%
4.6
m/s
W
25 September, Wednesday. day, 10°; night, 5°; clear
26
+10
+4
26 September, thu
+10
+4
Feels like
+6
507 mmHg
55%
4
m/s
S
26 September, Thursday. day, 10°; night, 4°; clear
27
+10
+4
27 September, fri
+10
+4
Feels like
+6
508 mmHg
56%
4.5
m/s
S
27 September, Friday. day, 10°; night, 4°; rain
28
+10
+3
28 September, sat
+10
+3
Feels like
+5
508 mmHg
52%
4.9
m/s
SW
28 September, Saturday. day, 10°; night, 3°; clear
29
+9
+3
29 September, sun
+9
+3
Feels like
+4
507 mmHg
56%
6
m/s
W
29 September, Sunday. day, 9°; night, 3°; clear
30
+7
+2
30 September, mon
+7
+2
Feels like
+3
507 mmHg
57%
4.9
m/s
W
30 September, Monday. day, 7°; night, 2°; rain
1
+7
+1
1 October, tue
+7
+1
Feels like
+2
506 mmHg
55%
5.3
m/s
W
1 October, Tuesday. day, 7°; night, 1°; clear
2
+7
+2
2 October, wed
+7
+2
Feels like
+2
505 mmHg
52%
5
m/s
SW
2 October, Wednesday. day, 7°; night, 2°; partly cloudy
3
+6
0
3 October, thu
+6
0
Feels like
+1
504 mmHg
63%
6.3
m/s
SW
3 October, Thursday. day, 6°; night, 0°; rain
4
+4
−1
4 October, fri
+4
−1
Feels like
−1
504 mmHg
67%
5.9
m/s
SW
4 October, Friday. day, 4°; night, -1°; partly cloudy
5
+3
−2
5 October, sat
+3
−2
Feels like
−2
504 mmHg
66%
6
m/s
W
5 October, Saturday. day, 3°; night, -2°; rain
Average data for 10 years
Keystone September
14
sunny days
14
days with precipitation
2
cloudy days
14 sunny days; 14 days with precipitation; 2 cloudy days;
56
%
air humidity
3.2
m/s
Wind
SW
110
mm of precipitation
(11% of annual average)
air humidity 56%; 110 millimeters of precipitation (11% of annual average); Wind south-westerly 3.2 Meters per second
Weather graphs for September
Temperature
Precipitation chance, %
Humidity, %
Wind, m/s
Pressure, mmHg
SW
S
W
SW
W
SW
W
SW
SW
W
SW
W
SW
SW
SW
SW
SW
W
W
W
SW
W
SW
SW
W
S
S
SW
W
W
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
Denver
Colorado Springs
Cheyenne
Littleton
Boulder
Aspen
Telluride
Montrose
Santa Fe
Cities with similar weather in September
Petropavlovsk
Cholpon-Ata
Reykyavik
Oslo
Santiago
Burabaj
Melbourne
Altay
Canberra
