Great Falls weather in January

In January, Great Falls sees average daytime highs of 33°F and overnight lows near 18°F, with 0.8 in of precipitation across 5.7 wet days and about 8.7 hours of daylight. It is the 12th-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 31°F in the first days to 35°F by the end. The sky is clear or mostly clear about 27% of the time in January, and the air most often feels dry.

Daylight stretches from about 8 h 18 min at the start of January to 9 h 12 min by month's end. Set against the rest of the year, January is Great Falls's 9th-clearest and 3rd-windiest month. For the whole year in context, see Great Falls's year-round climate.

Daytime high: 33°; 12th warmest
Overnight low: 18°; 1st coldest
Precipitation: 0.8 in; 5.7 wet days
Daylight: 8 h 36 min; 8:15 AM – 4:54 PM
Cloud cover: 63%; 9th clearest
Wind: 10 mph; 3rd windiest
Solar energy: 1.66 kWh/m²
Travel score: 0.0; out of 10

Great Falls is city in and county seat of Cascade County, Montana, United States.

Density: 985/km²; people per km²
Founded: 1883

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← December Great Falls year-round climate February →Best places to visit in January

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 31°F in the first days to 35°F by the end.

A typical January day in Great Falls reaches about 33°F in the afternoon and slips back to 18°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 13°F and 48°F. Set against its neighbours, January runs on par with December and about 3°F cooler than February.

	1	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
Avg high (°F)	31	31	31	31	31	31	31	32	32	32	32	33	33	33	33	34	34	34	34	35	35	35	35	35	35	35	35	35	35	35	35
Avg low (°F)	17	17	17	17	17	17	17	17	17	17	17	18	18	18	18	19	19	19	19	19	19	20	20	20	20	20	20	20	20	20	19

	Avg high (°F)	Avg low (°F)
1	31	17
2	31	17
3	31	17
4	31	17
5	31	17
6	31	17
7	31	17
8	32	17
9	32	17
10	32	17
11	32	17
12	33	18
13	33	18
14	33	18
15	33	18
16	34	19
17	34	19
18	34	19
19	34	19
20	35	19
21	35	19
22	35	20
23	35	20
24	35	20
25	35	20
26	35	20
27	35	20
28	35	20
29	35	20
30	35	20
31	35	19

How January really feels in Great Falls

Once humidity and wind are folded in, January averages 0 days that feel above 90°F and 31 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F

heat index over the day's high

Days feeling ≤ 32°F

31 feel bitter (≤ 14°F)

The story in January is cold — wind chill drags the overnight "feels like" below the raw low.

Great Falls weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 11th-wettest month here — the current month is highlighted below.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	33° / 18°	0.8	5.7	5.7	8.7	0.0
Feb	36° / 19°	0.7	5.8	5.9	9.9	0.0
Mar	45° / 26°	1.0	7	5.3	11.6	1.2
Apr	55° / 34°	2.0	9.4	4.2	13.3	3.5
May	65° / 43°	2.4	10.8	1.1	14.9	5.7
Jun	73° / 50°	2.9	10.5	0.1	15.7	6.6
Jul	84° / 56°	0.9	5.1	0	15.4	6.5
Aug	83° / 55°	1.1	4.8	0	14.1	7.0
Sep	71° / 47°	1.4	6.3	0.2	12.4	7.3
Oct	57° / 37°	1.3	7	2.5	10.6	4.3
Nov	43° / 27°	0.9	5.8	4.7	9.1	0.7
Dec	34° / 20°	0.8	5.7	5.6	8.3	0.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 14% of January, with mostly cloudy or overcast conditions the remaining 60%.

	1	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
Clearer (%)	42	40	40	40	40	40	40	39	40	40	40	40	40	40	40	40	39	40	40	41	40	40	40	40	41	41	41	41	41	42	42
Cloudier (%)	58	60	60	60	60	60	60	61	60	60	60	60	60	60	60	60	61	60	60	59	60	60	60	60	59	59	59	59	59	58	58

	Clearer (%)	Cloudier (%)
1	42	58
2	40	60
3	40	60
4	40	60
5	40	60
6	40	60
7	40	60
8	39	61
9	40	60
10	40	60
11	40	60
12	40	60
13	40	60
14	40	60
15	40	60
16	40	60
17	39	61
18	40	60
19	40	60
20	41	59
21	40	60
22	40	60
23	40	60
24	40	60
25	41	59
26	41	59
27	41	59
28	41	59
29	41	59
30	42	58
31	42	58

Chance of precipitation in January

Any precipitationSnow

Great Falls gets around 0.8 in of rain and snow over 5.7 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 18% and peaks near 22% on the wettest days, and about 6 days bring snow.

	1	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
Rain chance (%)	22	21	21	21	21	20	20	19	19	19	18	18	18	18	18	18	18	17	17	17	17	17	17	17	17	18	18	18	18	18	18
Snow chance (%)	21	21	20	20	20	20	19	19	19	19	19	19	19	19	19	19	18	18	18	18	18	18	18	18	17	17	17	17	17	18	18

	Rain chance (%)	Snow chance (%)
1	22	21
2	21	21
3	21	20
4	21	20
5	21	20
6	20	20
7	20	19
8	19	19
9	19	19
10	19	19
11	18	19
12	18	19
13	18	19
14	18	19
15	18	19
16	18	19
17	18	18
18	17	18
19	17	18
20	17	18
21	17	18
22	17	18
23	17	18
24	17	18
25	17	17
26	18	17
27	18	17
28	18	17
29	18	17
30	18	18
31	18	18

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	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
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

Wind in January

Winds average 10 mph in January.

Across January, daily wind ranges from about 10 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

	1	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
Wind speed (mph)	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (mph)	Feels
1	10	light breeze
2	10	light breeze
3	10	light breeze
4	10	light breeze
5	10	light breeze
6	10	light breeze
7	10	light breeze
8	10	light breeze
9	10	light breeze
10	10	light breeze
11	10	light breeze
12	10	light breeze
13	10	light breeze
14	10	light breeze
15	10	light breeze
16	10	light breeze
17	10	light breeze
18	10	light breeze
19	10	light breeze
20	10	light breeze
21	10	light breeze
22	10	light breeze
23	10	light breeze
24	10	light breeze
25	10	light breeze
26	10	light breeze
27	10	light breeze
28	10	light breeze
29	10	light breeze
30	10	light breeze
31	10	light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 8 h 18 min at the start of January to 9 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over January. Sunrise moves from 8:19 AM to 8:02 AM, and sunset from 4:37 PM to 5:15 PM.

	1	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
Daylight (h)	8.3	8.3	8.3	8.3	8.4	8.4	8.4	8.4	8.5	8.5	8.5	8.5	8.6	8.6	8.6	8.6	8.7	8.7	8.7	8.8	8.8	8.8	8.9	8.9	9.0	9.0	9.0	9.1	9.1	9.2	9.2
Sunrise (AM)	8:19	8:19	8:19	8:19	8:19	8:19	8:19	8:19	8:18	8:18	8:18	8:17	8:17	8:16	8:16	8:15	8:15	8:14	8:13	8:13	8:12	8:11	8:10	8:09	8:08	8:07	8:06	8:05	8:04	8:03	8:02
Sunset (PM)	4:37	4:38	4:39	4:40	4:41	4:42	4:43	4:44	4:45	4:46	4:48	4:49	4:50	4:51	4:52	4:54	4:55	4:56	4:58	4:59	5:00	5:02	5:03	5:05	5:06	5:08	5:09	5:10	5:12	5:13	5:15

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	8.3	8:19	4:37
2	8.3	8:19	4:38
3	8.3	8:19	4:39
4	8.3	8:19	4:40
5	8.4	8:19	4:41
6	8.4	8:19	4:42
7	8.4	8:19	4:43
8	8.4	8:19	4:44
9	8.5	8:18	4:45
10	8.5	8:18	4:46
11	8.5	8:18	4:48
12	8.5	8:17	4:49
13	8.6	8:17	4:50
14	8.6	8:16	4:51
15	8.6	8:16	4:52
16	8.6	8:15	4:54
17	8.7	8:15	4:55
18	8.7	8:14	4:56
19	8.7	8:13	4:58
20	8.8	8:13	4:59
21	8.8	8:12	5:00
22	8.8	8:11	5:02
23	8.9	8:10	5:03
24	8.9	8:09	5:05
25	9.0	8:08	5:06
26	9.0	8:07	5:08
27	9.0	8:06	5:09
28	9.1	8:05	5:10
29	9.1	8:04	5:12
30	9.2	8:03	5:13
31	9.2	8:02	5:15

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 1.66 kWh/m².

For context, solar energy here swings from a low near 1.39 kWh/m² to a high of 7.32 kWh/m² in July across the year — January's 1.66 kWh/m² sits near the bottom.

	1	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
Solar energy (kWh/m²)	1.4	1.4	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.6	1.6	1.6	1.6	1.6	1.6	1.7	1.7	1.7	1.7	1.8	1.8	1.8	1.9	1.9	1.9	1.9	2.0	2.0	2.1	2.1
Level	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	1.4	Dim
2	1.4	Dim
3	1.5	Dim
4	1.5	Dim
5	1.5	Dim
6	1.5	Dim
7	1.5	Dim
8	1.5	Dim
9	1.5	Dim
10	1.5	Dim
11	1.6	Dim
12	1.6	Dim
13	1.6	Dim
14	1.6	Dim
15	1.6	Dim
16	1.6	Dim
17	1.7	Dim
18	1.7	Dim
19	1.7	Dim
20	1.7	Dim
21	1.8	Dim
22	1.8	Dim
23	1.8	Dim
24	1.9	Dim
25	1.9	Dim
26	1.9	Dim
27	1.9	Dim
28	2.0	Dim
29	2.0	Moderate
30	2.1	Moderate
31	2.1	Moderate

Planning a trip in January

Is January a good time to visit Great Falls?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

0.0

Sightseeing

10th-best month of the year

0.0

Beach & pool

8th-best month of the year

January is a weaker month for outdoor sightseeing in Great Falls.

What to pack for Great Falls in January

From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In January, Great Falls sees daytime highs around 33°F and nights near 18°F. Pack a warm layer and a heavy coat. About 6 days see rain.

a warm layera heavy coat

UV index in Great Falls in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 1. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Great Falls peaks around July 14 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	1	2	3	4	7	7	8	6	5	4	1	1
Level	Low	Low	Moderate	Moderate	High	Very high	Very high	High	Moderate	Moderate	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	2	Low
Mar	3	Moderate
Apr	4	Moderate
May	7	High
Jun	7	Very high
Jul	8	Very high
Aug	6	High
Sep	5	Moderate
Oct	4	Moderate
Nov	1	Low
Dec	1	Low

Air quality in Great Falls in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in Great Falls is worst in August — around 23 µg/m³ PM2.5 (moderate), about 3.8× the cleanest month (December, 6 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	9	6	11	13	12	9	20	23	16	8	6	6
Level	Good	Good	Good	Moderate	Good	Good	Moderate	Moderate	Moderate	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	9	Good
Feb	6	Good
Mar	11	Good
Apr	13	Moderate
May	12	Good
Jun	9	Good
Jul	20	Moderate
Aug	23	Moderate
Sep	16	Moderate
Oct	8	Good
Nov	6	Good
Dec	6	Good

Location & terrain

Where is Great Falls?

Great Falls sits at 47.5°N, 111.3°W, 3,330 ft above sea level, in United States. The nearest listed city is Helena, 71 mi away.

Topography around Great Falls

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Great Falls.

Within 2 miles, the terrain around Great Falls has only modest variations in elevation — a maximum elevation change of 217 ft around an average of 3,366 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,270 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 6,588 ft.

The land around Great Falls is covered by artificial surfaces (52%) and grassland (22%) within 2 miles, grassland (51%) and cropland (38%) within 10 miles, and grassland (55%) and cropland (31%) within 50 miles.

2 miles

217 ft

artificial surfaces 52%

10 miles

1,270 ft

grassland 51%

50 miles

6,588 ft

grassland 55%

treesgrasslandcroplandartificial surfacesbare terrainwater

← December Great Falls year-round climate February →Best places to visit in January

January weather nearby: Helena 71 mi · Butte 119 mi · Bozeman 126 mi · Missoula 134 mi · Kalispell 148 mi · Whitefish 154 mi · Lethbridge 167 mi · Medicine Hat 178 mi

United States travel facts

Power plugs: Type A / B; 120 V · 60 Hz
Prices: ≈ 100% of US; price level, 2025
GDP per capita: $90,027; 2025
Happiness: 6.8 / 10; World Happiness, 2025
Safe drinking water: 98%; of population, 2024
Homicide rate: 5.8; per 100k, 2023
Road deaths: 12.7; per 100k/yr, 2019
Income group: High; World Bank
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Great Falls (47.5002°, -111.3008°, elevation 3,330 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°F)	Avg low (°F)
1	31	17
2	31	17
3	31	17
4	31	17
5	31	17
6	31	17
7	31	17
8	32	17
9	32	17
10	32	17
11	32	17
12	33	18
13	33	18
14	33	18
15	33	18
16	34	19
17	34	19
18	34	19
19	34	19
20	35	19
21	35	19
22	35	20
23	35	20
24	35	20
25	35	20
26	35	20
27	35	20
28	35	20
29	35	20
30	35	20
31	35	19

	Clearer (%)	Cloudier (%)
1	42	58
2	40	60
3	40	60
4	40	60
5	40	60
6	40	60
7	40	60
8	39	61
9	40	60
10	40	60
11	40	60
12	40	60
13	40	60
14	40	60
15	40	60
16	40	60
17	39	61
18	40	60
19	40	60
20	41	59
21	40	60
22	40	60
23	40	60
24	40	60
25	41	59
26	41	59
27	41	59
28	41	59
29	41	59
30	42	58
31	42	58

	Rain chance (%)	Snow chance (%)
1	22	21
2	21	21
3	21	20
4	21	20
5	21	20
6	20	20
7	20	19
8	19	19
9	19	19
10	19	19
11	18	19
12	18	19
13	18	19
14	18	19
15	18	19
16	18	19
17	18	18
18	17	18
19	17	18
20	17	18
21	17	18
22	17	18
23	17	18
24	17	18
25	17	17
26	18	17
27	18	17
28	18	17
29	18	17
30	18	18
31	18	18

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°F)	Avg low (°F)
1	31	17
2	31	17
3	31	17
4	31	17
5	31	17
6	31	17
7	31	17
8	32	17
9	32	17
10	32	17
11	32	17
12	33	18
13	33	18
14	33	18
15	33	18
16	34	19
17	34	19
18	34	19
19	34	19
20	35	19
21	35	19
22	35	20
23	35	20
24	35	20
25	35	20
26	35	20
27	35	20
28	35	20
29	35	20
30	35	20
31	35	19

	Clearer (%)	Cloudier (%)
1	42	58
2	40	60
3	40	60
4	40	60
5	40	60
6	40	60
7	40	60
8	39	61
9	40	60
10	40	60
11	40	60
12	40	60
13	40	60
14	40	60
15	40	60
16	40	60
17	39	61
18	40	60
19	40	60
20	41	59
21	40	60
22	40	60
23	40	60
24	40	60
25	41	59
26	41	59
27	41	59
28	41	59
29	41	59
30	42	58
31	42	58

	Rain chance (%)	Snow chance (%)
1	22	21
2	21	21
3	21	20
4	21	20
5	21	20
6	20	20
7	20	19
8	19	19
9	19	19
10	19	19
11	18	19
12	18	19
13	18	19
14	18	19
15	18	19
16	18	19
17	18	18
18	17	18
19	17	18
20	17	18
21	17	18
22	17	18
23	17	18
24	17	18
25	17	17
26	18	17
27	18	17
28	18	17
29	18	17
30	18	18
31	18	18

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°F)	Avg low (°F)
1	31	17
2	31	17
3	31	17
4	31	17
5	31	17
6	31	17
7	31	17
8	32	17
9	32	17
10	32	17
11	32	17
12	33	18
13	33	18
14	33	18
15	33	18
16	34	19
17	34	19
18	34	19
19	34	19
20	35	19
21	35	19
22	35	20
23	35	20
24	35	20
25	35	20
26	35	20
27	35	20
28	35	20
29	35	20
30	35	20
31	35	19

	Clearer (%)	Cloudier (%)
1	42	58
2	40	60
3	40	60
4	40	60
5	40	60
6	40	60
7	40	60
8	39	61
9	40	60
10	40	60
11	40	60
12	40	60
13	40	60
14	40	60
15	40	60
16	40	60
17	39	61
18	40	60
19	40	60
20	41	59
21	40	60
22	40	60
23	40	60
24	40	60
25	41	59
26	41	59
27	41	59
28	41	59
29	41	59
30	42	58
31	42	58

	Rain chance (%)	Snow chance (%)
1	22	21
2	21	21
3	21	20
4	21	20
5	21	20
6	20	20
7	20	19
8	19	19
9	19	19
10	19	19
11	18	19
12	18	19
13	18	19
14	18	19
15	18	19
16	18	19
17	18	18
18	17	18
19	17	18
20	17	18
21	17	18
22	17	18
23	17	18
24	17	18
25	17	17
26	18	17
27	18	17
28	18	17
29	18	17
30	18	18
31	18	18

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100