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Monthly weather forecast in Boulder
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 September
+22
+15
1 September, sun
+22
+15
Feels like
+18
648 mmHg
38%
5.5
m/s
SE
1 September, Sunday. day, 22°; night, 15°; partly cloudy
2
+21
+14
2 September, mon
+21
+14
Feels like
+17
648 mmHg
40%
5.8
m/s
E
2 September, Monday. day, 21°; night, 14°; partly cloudy
3
+21
+13
3 September, tue
+21
+13
Feels like
+18
648 mmHg
37%
5.3
m/s
W
3 September, Tuesday. day, 21°; night, 13°; partly cloudy
4
+20
+14
4 September, wed
+20
+14
Feels like
+17
647 mmHg
38%
5.5
m/s
SE
4 September, Wednesday. day, 20°; night, 14°; clear
5
+19
+13
5 September, thu
+19
+13
Feels like
+16
648 mmHg
43%
5.5
m/s
N
5 September, Thursday. day, 19°; night, 13°; clear
6
+20
+13
6 September, fri
+20
+13
Feels like
+16
648 mmHg
40%
5
m/s
SE
6 September, Friday. day, 20°; night, 13°; partly cloudy
7
September
+29
+15
7 September, sat
+29
+15
Feels like
+22
632 mmHg
35%
3.8
m/s
W
Climate normal
+20
+12
7 September, Saturday. day, 29°; night, 15°; mostly clear
8
+30
+17
8 September, sun
+30
+17
Feels like
+22
630 mmHg
32%
4.8
m/s
W
Climate normal
+20
+13
8 September, Sunday. day, 30°; night, 17°; thunderstorm
9
+30
+18
9 September, mon
+30
+18
Feels like
+21
630 mmHg
33%
5
m/s
W
Climate normal
+19
+12
9 September, Monday. day, 30°; night, 18°; thunderstorm with rain
10
+29
+16
10 September, tue
+29
+16
Feels like
+18
627 mmHg
38%
8.2
m/s
W
Climate normal
+18
+11
10 September, Tuesday. day, 29°; night, 16°; thunderstorm
11
+27
+16
11 September, wed
+27
+16
Feels like
+18
621 mmHg
44%
5.2
m/s
W
Climate normal
+17
+11
11 September, Wednesday. day, 27°; night, 16°; thunderstorm with rain
12
+30
+16
12 September, thu
+30
+16
Feels like
+17
616 mmHg
32%
8.3
m/s
W
Climate normal
+18
+11
12 September, Thursday. day, 30°; night, 16°; mostly clear
13
+28
+14
13 September, fri
+28
+14
Feels like
+17
622 mmHg
35%
5.1
m/s
W
Climate normal
+17
+11
13 September, Friday. day, 28°; night, 14°; mostly clear
14
+27
+13
14 September, sat
+27
+13
Feels like
+16
628 mmHg
35%
5.9
m/s
W
Climate normal
+16
+10
14 September, Saturday. day, 27°; night, 13°; partly cloudy
15
+29
+15
15 September, sun
+29
+15
Feels like
+17
628 mmHg
37%
6.2
m/s
W
Climate normal
+18
+12
15 September, Sunday. day, 29°; night, 15°; mostly clear
16
+29
+13
16 September, mon
+29
+13
Feels like
+17
624 mmHg
44%
6.7
m/s
W
Climate normal
+18
+12
16 September, Monday. day, 29°; night, 13°; partly cloudy
17
+26
+13
17 September, tue
+26
+13
Feels like
+13
624 mmHg
54%
7.8
m/s
W
Climate normal
+18
+11
17 September, Tuesday. day, 26°; night, 13°; mostly clear
18
+22
+12
18 September, wed
+22
+12
Feels like
+14
625 mmHg
61%
5.7
m/s
W
Climate normal
+19
+12
18 September, Wednesday. day, 22°; night, 12°; mostly clear
19
+17
+8
19 September, thu
+17
+8
Feels like
+10
585 mmHg
46%
5
m/s
SE
Climate normal
+19
+11
19 September, Thursday. day, 17°; night, 8°; mostly clear
20
+16
+5
20 September, fri
+16
+5
Feels like
+7
546 mmHg
41%
4.6
m/s
SW
Climate normal
+18
+12
20 September, Friday. day, 16°; night, 5°; mostly clear
21
+15
+5
21 September, sat
+15
+5
Feels like
+6
548 mmHg
40%
3
m/s
E
Climate normal
+17
+11
21 September, Saturday. day, 15°; night, 5°; light rain
22
+17
+7
22 September, sun
+17
+7
Feels like
+11
549 mmHg
52%
Calm m/s
Climate normal
+16
+9
22 September, Sunday. day, 17°; night, 7°; partly cloudy
23
+16
+6
23 September, mon
+16
+6
Feels like
+7
548 mmHg
32%
3.1
m/s
W
Climate normal
+17
+11
23 September, Monday. day, 16°; night, 6°; clear
24
+18
+6
24 September, tue
+18
+6
Feels like
+8
548 mmHg
29%
1.7
m/s
W
Climate normal
+17
+11
24 September, Tuesday. day, 18°; night, 6°; clear
25
+18
+8
25 September, wed
+18
+8
Feels like
+7
548 mmHg
21%
3.7
m/s
W
Climate normal
+18
+12
25 September, Wednesday. day, 18°; night, 8°; clear
26
+20
+9
26 September, thu
+20
+9
Feels like
+10
546 mmHg
31%
2.9
m/s
SW
Climate normal
+17
+11
26 September, Thursday. day, 20°; night, 9°; mostly clear
27
+14
+5
27 September, fri
+14
+5
Feels like
+8
545 mmHg
70%
2.5
m/s
W
Climate normal
+16
+11
27 September, Friday. day, 14°; night, 5°; rain
28
+9
+4
28 September, sat
+9
+4
Feels like
+4
548 mmHg
81%
2.9
m/s
NW
Climate normal
+16
+10
28 September, Saturday. day, 9°; night, 4°; rain
29
+11
+4
29 September, sun
+11
+4
Feels like
+5
550 mmHg
79%
2.3
m/s
E
Climate normal
+17
+10
29 September, Sunday. day, 11°; night, 4°; rain
30
+9
+5
30 September, mon
+9
+5
Feels like
+4
550 mmHg
85%
2.9
m/s
SE
Climate normal
+16
+9
30 September, Monday. day, 9°; night, 5°; rain
1 October
+10
+4
1 October, tue
+10
+4
Feels like
+5
549 mmHg
76%
2.9
m/s
SE
Climate normal
+14
+8
1 October, Tuesday. day, 10°; night, 4°; light rain
2
+13
+8
2 October, wed
+13
+8
Feels like
+6
549 mmHg
67%
3.2
m/s
S
Climate normal
+14
+9
2 October, Wednesday. day, 13°; night, 8°; partly cloudy
3
+9
+3
3 October, thu
+9
+3
Feels like
+4
547 mmHg
86%
4.6
m/s
SW
Climate normal
+14
+6
3 October, Thursday. day, 9°; night, 3°; rain
4
+12
+5
4 October, fri
+12
+5
Feels like
+3
547 mmHg
63%
4.3
m/s
W
Climate normal
+12
+6
4 October, Friday. day, 12°; night, 5°; clear
5
+14
+6
5 October, sat
+14
+6
Feels like
+6
548 mmHg
56%
3.6
m/s
SW
Climate normal
+11
+5
5 October, Saturday. day, 14°; night, 6°; clear
Average for 30 days
14
sunny days
9
days with precipitation
7
cloudy days
14 sunny days; 9 days with precipitation; 7 cloudy days;
49
%
air humidity
4.3
m/s
Wind
W
9
mm of precipitation
(2% of annual average)
air humidity 49%; 9 millimeters of precipitation (2% of annual average); Wind westerly 4.3 Meters per second
Forecast in graphs
Temperature
Humidity, %
Wind, m/s
Pressure, mmHg
W
W
W
W
W
W
W
W
W
W
W
W
SE
SW
E
W
W
W
SW
W
NW
E
SE
SE
S
SW
W
SW
W
7
Average data for 10 years
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
1
October
2
3
4
5
6
Daytime temperature
Night-time temperature
