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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
25
August
+30
+17
25 August, sun
+30
+17
Feels like
+23
632 mmHg
37%
4.6
m/s
W
Climate normal
+21
+16
25 August, Sunday. day, 30°; night, 17°; partly cloudy
26
+28
+14
26 August, mon
+28
+14
Feels like
+23
633 mmHg
41%
3.7
m/s
W
Climate normal
+22
+15
26 August, Monday. day, 28°; night, 14°; thunderstorm
27
+30
+15
27 August, tue
+30
+15
Feels like
+23
632 mmHg
39%
4.9
m/s
SE
Climate normal
+22
+16
27 August, Tuesday. day, 30°; night, 15°; mostly clear
28
+33
+18
28 August, wed
+33
+18
Feels like
+22
630 mmHg
36%
5.4
m/s
W
Climate normal
+22
+16
28 August, Wednesday. day, 33°; night, 18°; mostly clear
29
+28
+15
29 August, thu
+28
+15
Feels like
+19
632 mmHg
40%
3.8
m/s
E
Climate normal
+22
+16
29 August, Thursday. day, 28°; night, 15°; mostly clear
30
+31
+18
30 August, fri
+31
+18
Feels like
+21
634 mmHg
42%
4.6
m/s
E
Climate normal
+21
+15
30 August, Friday. day, 31°; night, 18°; mostly clear
31
+29
+17
31 August, sat
+29
+17
Feels like
+20
631 mmHg
42%
5.2
m/s
NW
Climate normal
+22
+15
31 August, Saturday. day, 29°; night, 17°; partly cloudy
1 September
+23
+14
1 September, sun
+23
+14
Feels like
+16
633 mmHg
65%
4.8
m/s
SW
Climate normal
+22
+15
1 September, Sunday. day, 23°; night, 14°; overcast
2
+28
+14
2 September, mon
+28
+14
Feels like
+20
632 mmHg
55%
3.9
m/s
NW
Climate normal
+21
+14
2 September, Monday. day, 28°; night, 14°; mostly clear
3
+30
+14
3 September, tue
+30
+14
Feels like
+20
629 mmHg
46%
4.9
m/s
W
Climate normal
+21
+13
3 September, Tuesday. day, 30°; night, 14°; mostly clear
4
+29
+15
4 September, wed
+29
+15
Feels like
+18
627 mmHg
50%
5.8
m/s
W
Climate normal
+20
+14
4 September, Wednesday. day, 29°; night, 15°; mostly clear
5
+30
+17
5 September, thu
+30
+17
Feels like
+20
626 mmHg
40%
5.3
m/s
W
Climate normal
+19
+13
5 September, Thursday. day, 30°; night, 17°; mostly clear
6
+20
+8
6 September, fri
+20
+8
Feels like
+13
589 mmHg
52%
4.9
m/s
W
Climate normal
+20
+13
6 September, Friday. day, 20°; night, 8°; rain
7
+21
+8
7 September, sat
+21
+8
Feels like
+11
550 mmHg
57%
2.6
m/s
SW
Climate normal
+20
+12
7 September, Saturday. day, 21°; night, 8°; mostly clear
8
+20
+9
8 September, sun
+20
+9
Feels like
+11
549 mmHg
55%
3.2
m/s
SW
Climate normal
+20
+13
8 September, Sunday. day, 20°; night, 9°; mostly clear
9
+17
+8
9 September, mon
+17
+8
Feels like
+9
548 mmHg
57%
3.7
m/s
W
Climate normal
+19
+12
9 September, Monday. day, 17°; night, 8°; partly cloudy
10
+19
+9
10 September, tue
+19
+9
Feels like
+11
550 mmHg
49%
2.7
m/s
W
Climate normal
+18
+11
10 September, Tuesday. day, 19°; night, 9°; mostly clear
11
+20
+9
11 September, wed
+20
+9
Feels like
+12
549 mmHg
36%
2.6
m/s
SW
Climate normal
+17
+11
11 September, Wednesday. day, 20°; night, 9°; clear
12
+16
+8
12 September, thu
+16
+8
Feels like
+8
545 mmHg
41%
5
m/s
SW
Climate normal
+18
+11
12 September, Thursday. day, 16°; night, 8°; partly cloudy
13
+12
+9
13 September, fri
+12
+9
Feels like
+6
545 mmHg
73%
4.6
m/s
S
Climate normal
+17
+11
13 September, Friday. day, 12°; night, 9°; light rain
14
+16
+9
14 September, sat
+16
+9
Feels like
+9
547 mmHg
60%
3.7
m/s
S
Climate normal
+16
+10
14 September, Saturday. day, 16°; night, 9°; light rain
15
+14
+6
15 September, sun
+14
+6
Feels like
+6
548 mmHg
48%
4.5
m/s
W
Climate normal
+18
+12
15 September, Sunday. day, 14°; night, 6°; mostly clear
16
+15
+8
16 September, mon
+15
+8
Feels like
+7
548 mmHg
46%
3.4
m/s
W
Climate normal
+18
+12
16 September, Monday. day, 15°; night, 8°; clear
17
+16
+7
17 September, tue
+16
+7
Feels like
+6
546 mmHg
40%
3.8
m/s
W
Climate normal
+18
+11
17 September, Tuesday. day, 16°; night, 7°; clear
18
+17
+2
18 September, wed
+17
+2
Feels like
+7
547 mmHg
33%
3.9
m/s
W
Climate normal
+19
+12
18 September, Wednesday. day, 17°; night, 2°; clear
19
+18
+9
19 September, thu
+18
+9
Feels like
+10
551 mmHg
48%
1.9
m/s
SE
Climate normal
+19
+11
19 September, Thursday. day, 18°; night, 9°; clear
20
+20
+9
20 September, fri
+20
+9
Feels like
+11
551 mmHg
35%
3.4
m/s
SW
Climate normal
+18
+12
20 September, Friday. day, 20°; night, 9°; clear
21
+19
+9
21 September, sat
+19
+9
Feels like
+10
548 mmHg
41%
4.3
m/s
SW
Climate normal
+17
+11
21 September, Saturday. day, 19°; night, 9°; clear
22
+18
+9
22 September, sun
+18
+9
Feels like
+10
545 mmHg
45%
3.8
m/s
SW
Climate normal
+16
+9
22 September, Sunday. day, 18°; night, 9°; clear
23
+18
+10
23 September, mon
+18
+10
Feels like
+9
546 mmHg
34%
2.9
m/s
S
Climate normal
+17
+11
23 September, Monday. day, 18°; night, 10°; clear
Average data for 10 years
Next, the average data for 10 years
24
+17
+11
24 September, tue
+17
+11
Feels like
+13
647 mmHg
40%
5
m/s
S
24 September, Tuesday. day, 17°; night, 11°; rain
25
+18
+12
25 September, wed
+18
+12
Feels like
+14
647 mmHg
37%
5.3
m/s
E
25 September, Wednesday. day, 18°; night, 12°; clear
26
+17
+11
26 September, thu
+17
+11
Feels like
+13
648 mmHg
44%
5
m/s
E
26 September, Thursday. day, 17°; night, 11°; partly cloudy
27
+16
+11
27 September, fri
+16
+11
Feels like
+13
649 mmHg
44%
5.3
m/s
SE
27 September, Friday. day, 16°; night, 11°; rain
28
+16
+10
28 September, sat
+16
+10
Feels like
+12
649 mmHg
43%
5.5
m/s
SE
28 September, Saturday. day, 16°; night, 10°; clear
Average for 30 days
22
sunny days
2
days with precipitation
6
cloudy days
22 sunny days; 2 days with precipitation; 6 cloudy days;
46
%
air humidity
4.1
m/s
Wind
W
2
mm of precipitation
(1% of annual average)
air humidity 46%; 2 millimeters of precipitation (1% of annual average); Wind westerly 4.1 Meters per second
Forecast in graphs
Temperature
Humidity, %
Wind, m/s
Pressure, mmHg
W
W
SE
W
E
E
NW
SW
NW
W
W
W
W
SW
SW
W
W
SW
SW
S
S
W
W
W
W
SE
SW
SW
SW
S
25
Average data for 10 years
26
27
28
29
30
31
1
September
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Daytime temperature
Night-time temperature
