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December weather forecast in Helena
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
30
−1
−4
30 November, sun
−1
−4
Feels like
−6
667 mmHg
80%
5.9
m/s
SW
30 November, Sunday. day, -1°; night, -4°; clear
1
−1
−6
1 December, mon
−1
−6
Feels like
−6
665 mmHg
81%
4.9
m/s
W
1 December, Monday. day, -1°; night, -6°; overcast
2
−4
−7
2 December, tue
−4
−7
Feels like
−10
666 mmHg
80%
5.5
m/s
W
2 December, Tuesday. day, -4°; night, -7°; snow
3
−5
−8
3 December, wed
−5
−8
Feels like
−10
668 mmHg
76%
5
m/s
W
3 December, Wednesday. day, -5°; night, -8°; overcast
4
−5
−9
4 December, thu
−5
−9
Feels like
−11
670 mmHg
81%
5.1
m/s
SW
4 December, Thursday. day, -5°; night, -9°; snow
5
−5
−9
5 December, fri
−5
−9
Feels like
−11
670 mmHg
81%
5.6
m/s
SW
5 December, Friday. day, -5°; night, -9°; overcast
6
−6
−9
6 December, sat
−6
−9
Feels like
−12
669 mmHg
81%
4.8
m/s
W
6 December, Saturday. day, -6°; night, -9°; snow
7
−5
−8
7 December, sun
−5
−8
Feels like
−11
668 mmHg
79%
5
m/s
SW
7 December, Sunday. day, -5°; night, -8°; snow
8
−5
−8
8 December, mon
−5
−8
Feels like
−11
668 mmHg
81%
6.3
m/s
W
8 December, Monday. day, -5°; night, -8°; partly cloudy
9
−4
−6
9 December, tue
−4
−6
Feels like
−10
667 mmHg
81%
6.8
m/s
SW
9 December, Tuesday. day, -4°; night, -6°; overcast
10
−2
−5
10 December, wed
−2
−5
Feels like
−8
666 mmHg
80%
5.8
m/s
SW
10 December, Wednesday. day, -2°; night, -5°; clear
11
−2
−5
11 December, thu
−2
−5
Feels like
−7
665 mmHg
83%
5.5
m/s
SW
11 December, Thursday. day, -2°; night, -5°; overcast
12
−3
−5
12 December, fri
−3
−5
Feels like
−8
663 mmHg
88%
4.9
m/s
W
12 December, Friday. day, -3°; night, -5°; snow
13
−4
−9
13 December, sat
−4
−9
Feels like
−10
665 mmHg
87%
6.1
m/s
W
13 December, Saturday. day, -4°; night, -9°; snow
14
−5
−9
14 December, sun
−5
−9
Feels like
−11
666 mmHg
81%
5.5
m/s
SW
14 December, Sunday. day, -5°; night, -9°; overcast
15
−6
−10
15 December, mon
−6
−10
Feels like
−12
667 mmHg
88%
4.5
m/s
SW
15 December, Monday. day, -6°; night, -10°; snow
16
−6
−9
16 December, tue
−6
−9
Feels like
−12
666 mmHg
87%
5.6
m/s
SW
16 December, Tuesday. day, -6°; night, -9°; overcast
17
−4
−7
17 December, wed
−4
−7
Feels like
−10
663 mmHg
87%
6
m/s
SW
17 December, Wednesday. day, -4°; night, -7°; snow
18
−5
−8
18 December, thu
−5
−8
Feels like
−11
664 mmHg
88%
5.5
m/s
SW
18 December, Thursday. day, -5°; night, -8°; snow
19
−5
−8
19 December, fri
−5
−8
Feels like
−11
663 mmHg
88%
5.9
m/s
SW
19 December, Friday. day, -5°; night, -8°; snow
20
−4
−8
20 December, sat
−4
−8
Feels like
−10
664 mmHg
88%
6
m/s
SW
20 December, Saturday. day, -4°; night, -8°; overcast
21
−5
−9
21 December, sun
−5
−9
Feels like
−11
666 mmHg
89%
4.9
m/s
SW
21 December, Sunday. day, -5°; night, -9°; clear
22
−5
−9
22 December, mon
−5
−9
Feels like
−11
666 mmHg
88%
5.5
m/s
SW
22 December, Monday. day, -5°; night, -9°; overcast
23
−6
−9
23 December, tue
−6
−9
Feels like
−11
666 mmHg
88%
5.9
m/s
SW
23 December, Tuesday. day, -6°; night, -9°; clear
24
−7
−11
24 December, wed
−7
−11
Feels like
−13
667 mmHg
88%
5
m/s
SW
24 December, Wednesday. day, -7°; night, -11°; overcast
25
−7
−9
25 December, thu
−7
−9
Feels like
−12
667 mmHg
87%
5.3
m/s
SW
25 December, Thursday. day, -7°; night, -9°; overcast
26
−5
−8
26 December, fri
−5
−8
Feels like
−12
667 mmHg
88%
6.3
m/s
SW
26 December, Friday. day, -5°; night, -8°; overcast
27
−4
−7
27 December, sat
−4
−7
Feels like
−10
665 mmHg
91%
5.6
m/s
SW
27 December, Saturday. day, -4°; night, -7°; overcast
28
−6
−12
28 December, sun
−6
−12
Feels like
−12
666 mmHg
87%
5.8
m/s
W
28 December, Sunday. day, -6°; night, -12°; overcast
29
−6
−10
29 December, mon
−6
−10
Feels like
−12
667 mmHg
88%
5.5
m/s
W
29 December, Monday. day, -6°; night, -10°; overcast
30
−4
−11
30 December, tue
−4
−11
Feels like
−10
669 mmHg
86%
5.6
m/s
W
30 December, Tuesday. day, -4°; night, -11°; partly cloudy
31
−4
−11
31 December, wed
−4
−11
Feels like
−10
669 mmHg
86%
5.6
m/s
W
31 December, Wednesday. day, -4°; night, -11°; partly cloudy
1
−5
−9
1 January, thu
−5
−9
Feels like
−11
668 mmHg
87%
6.3
m/s
SW
1 January, Thursday. day, -5°; night, -9°; partly cloudy
2
−4
−8
2 January, fri
−4
−8
Feels like
−10
668 mmHg
87%
5.6
m/s
SW
2 January, Friday. day, -4°; night, -8°; partly cloudy
3
−5
−9
3 January, sat
−5
−9
Feels like
−11
669 mmHg
85%
5.1
m/s
SW
3 January, Saturday. day, -5°; night, -9°; clear
Average data for 10 years
Helena December
3
sunny days
10
days with precipitation
18
cloudy days
3 sunny days; 10 days with precipitation; 18 cloudy days;
86
%
air humidity
4.1
m/s
Wind
SW
41
mm of precipitation
(7% of annual average)
air humidity 86%; 41 millimeters of precipitation (7% of annual average); Wind south-westerly 4.1 Meters per second
Weather graphs for December
Temperature
Precipitation chance, %
Humidity, %
Wind, m/s
Pressure, mmHg
W
W
W
SW
SW
W
SW
W
SW
SW
SW
W
W
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
W
W
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
31
Daytime temperature
Night-time temperature
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