10 day forecast Monthly forecast Weather map

City or area

Go to comparison

December weather forecast in Great Falls

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 November, sun

	663 mmHg		65%
	6.3 m/s

30 November, Sunday. day, 3°; night, -4°; partly cloudy

1 December, mon

	663 mmHg		67%
	6.9 m/s

1 December, Monday. day, 3°; night, -3°; partly cloudy

2 December, tue

	663 mmHg		66%
	6.9 m/s

2 December, Tuesday. day, 3°; night, -4°; clear

3 December, wed

	665 mmHg		65%
	6.9 m/s

3 December, Wednesday. day, 2°; night, -4°; partly cloudy

4 December, thu

	666 mmHg		64%
	6.7 m/s

4 December, Thursday. day, 2°; night, -4°; clear

5 December, fri

	665 mmHg		65%
	6.6 m/s

5 December, Friday. day, 2°; night, -5°; clear

6 December, sat

	665 mmHg		63%
	6.2 m/s

6 December, Saturday. day, 1°; night, -6°; clear

7 December, sun

	664 mmHg		64%
	6 m/s

7 December, Sunday. day, 1°; night, -6°; clear

8 December, mon

	664 mmHg		65%
	6.4 m/s

8 December, Monday. day, 1°; night, -6°; clear

9 December, tue

	665 mmHg		63%
	6.9 m/s

9 December, Tuesday. day, 2°; night, -5°; clear

10 December, wed

	664 mmHg		64%
	6.6 m/s

10 December, Wednesday. day, 1°; night, -4°; rain

11 December, thu

	663 mmHg		66%
	6.5 m/s

11 December, Thursday. day, 2°; night, -5°; partly cloudy

12 December, fri

	663 mmHg		65%
	6.6 m/s

12 December, Friday. day, 2°; night, -4°; partly cloudy

13 December, sat

	662 mmHg		66%
	6.7 m/s

13 December, Saturday. day, 2°; night, -5°; partly cloudy

14 December, sun

	662 mmHg		66%
	6.5 m/s

14 December, Sunday. day, 0°; night, -5°; snow

15 December, mon

	663 mmHg		64%
	6.9 m/s

15 December, Monday. day, 1°; night, -5°; overcast

16 December, tue

	664 mmHg		64%
	7 m/s

16 December, Tuesday. day, 2°; night, -5°; partly cloudy

17 December, wed

	664 mmHg		63%
	7.1 m/s

17 December, Wednesday. day, 2°; night, -4°; clear

18 December, thu

	664 mmHg		63%
	6.9 m/s

18 December, Thursday. day, 1°; night, -6°; overcast

19 December, fri

	664 mmHg		63%
	7.2 m/s

19 December, Friday. day, 0°; night, -5°; snow

20 December, sat

	663 mmHg		63%
	6.7 m/s

20 December, Saturday. day, 0°; night, -6°; overcast

21 December, sun

	663 mmHg		66%
	6.2 m/s

21 December, Sunday. day, 0°; night, -6°; partly cloudy

22 December, mon

	664 mmHg		67%
	5.7 m/s

22 December, Monday. day, -1°; night, -7°; partly cloudy

23 December, tue

	665 mmHg		65%
	5.9 m/s

23 December, Tuesday. day, -1°; night, -9°; clear

24 December, wed

	664 mmHg		65%
	6.3 m/s

24 December, Wednesday. day, 0°; night, -7°; partly cloudy

25 December, thu

	665 mmHg		64%
	5.9 m/s

25 December, Thursday. day, 0°; night, -6°; partly cloudy

26 December, fri

	663 mmHg		67%
	5.7 m/s

26 December, Friday. day, 0°; night, -7°; clear

27 December, sat

	662 mmHg		65%
	6.5 m/s

27 December, Saturday. day, 0°; night, -6°; partly cloudy

28 December, sun

	662 mmHg		67%
	7 m/s

28 December, Sunday. day, 1°; night, -6°; partly cloudy

29 December, mon

	663 mmHg		69%
	6.1 m/s

29 December, Monday. day, 0°; night, -7°; snow

30 December, tue

	662 mmHg		70%
	6.4 m/s

30 December, Tuesday. day, 0°; night, -8°; snow

31 December, wed

	663 mmHg		70%
	5.9 m/s

31 December, Wednesday. day, -1°; night, -7°; overcast

1 January, thu

	664 mmHg		69%
	6.5 m/s

1 January, Thursday. day, 0°; night, -8°; snow

2 January, fri

	664 mmHg		66%
	7.2 m/s

2 January, Friday. day, 0°; night, -6°; clear

3 January, sat

	663 mmHg		66%
	6.6 m/s

3 January, Saturday. day, 0°; night, -7°; partly cloudy

Average data for 10 years

Great Falls December

10

sunny days

5

days with precipitation

7

cloudy days

10 sunny days; 5 days with precipitation; 7 cloudy days;

65

%

air humidity

4.6

m/s

WindSW

20

mm of precipitation

(5% of annual average)

air humidity 65%; 20 millimeters of precipitation (5% of annual average); Wind south-westerly 4.6 Meters per second

Weather graphs for December

TemperaturePrecipitation chance, %Humidity, %Wind, m/sPressure, mmHg

SW

SW

SW

SW

SW

SW

SW

SW

SW

S

S

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

S

SW

SW

SW

S

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

31

Daytime temperature

Night-time temperature

Cities near you

Calgary
Moscow
West Yellowstone
Medicine Hat
Bozeman
Billings
Cody
Jackson
Missoula

Cities with similar weather in December

Minsk
Mogilev
Vitebsk
Cholpon-Ata
Atyrau
Kyzylorda
Baikonur
Orsha
Polotsk

The weather forecast for December 2025 is based on historical data from the past 10 years.

December in Great Falls is the coldest month of the year. In December, the weather in Great Falls is typically cold. Average daily high temperature in December is about 1 degree above zero. On average, Great Falls has 13 partly cloudy, 10 sunny, 4 snowy, and 4 cloudy days in December. The snowfalls are usually light. December as well as January, February, March, and April is considered the most uncomfortable time to visit Great Falls.

Links

Help Terms of use Contact us

For partners

Advertisement Yandex.Weather API

Weather forecasts

Hourly forecast Detailed 10 day forecast Monthly forecast Weather map Magnetic storms

Download app

English

English
Русский

Source data: Yandex.Traffic, Roshydromet FSBI "CAO", NOAA, © OpenStreetMap

© 2017–2025 YANDEX LLC