Cheyenne weather in December

In December, Cheyenne sees average daytime highs of 38°F and overnight lows near 21°F, with 0.7 in of precipitation across 4.2 wet days and about 9.1 hours of daylight. It is the 12th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 41°F in the first days to 37°F by the end. The sky is clear or mostly clear about 47% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 18 min at the start of December to 9 h 06 min by month's end. Set against the rest of the year, December is Cheyenne's 4th-clearest and 2nd-windiest month. For the whole year in context, see Cheyenne's year-round climate.

Daytime high: 38°; 12th warmest
Overnight low: 21°; 2nd coldest
Precipitation: 0.7 in; 4.2 wet days
Daylight: 9 h 06 min; 7:24 AM – 4:27 PM
Cloud cover: 46%; 4th clearest
Wind: 13 mph; 2nd windiest
Solar energy: 2.29 kWh/m²
Travel score: 0.0; out of 10

Cheyenne is capital city of the U.S. state of Wyoming and seat of Laramie County.

Density: 1,021/km²; people per km²
Founded: 1867

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

← November Cheyenne year-round climate January →Best places to visit in December

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 41°F in the first days to 37°F by the end.

A typical December day in Cheyenne reaches about 38°F in the afternoon and slips back to 21°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 23°F and 53°F. Set against its neighbours, December runs about 8°F cooler than November and on par with January.

	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)	41	41	41	40	40	40	40	39	39	39	39	39	38	38	38	38	38	38	38	37	37	37	37	37	37	37	37	37	37	37	37
Avg low (°F)	23	23	23	22	22	22	22	22	22	22	21	21	21	21	21	21	20	20	20	20	20	20	20	20	20	20	20	20	20	19	19

	Avg high (°F)	Avg low (°F)
1	41	23
2	41	23
3	41	23
4	40	22
5	40	22
6	40	22
7	40	22
8	39	22
9	39	22
10	39	22
11	39	21
12	39	21
13	38	21
14	38	21
15	38	21
16	38	21
17	38	20
18	38	20
19	38	20
20	37	20
21	37	20
22	37	20
23	37	20
24	37	20
25	37	20
26	37	20
27	37	20
28	37	20
29	37	20
30	37	19
31	37	19

How December really feels in Cheyenne

Once humidity and wind are folded in, December 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 December is cold — wind chill drags the overnight "feels like" below the raw low.

Cheyenne weather by month

How December compares with the rest of the year at a glance. December 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	38° / 21°	0.5	3.9	3.8	9.4	0.0
Feb	40° / 21°	0.7	4.8	4.8	10.4	0.1
Mar	49° / 27°	1.4	6.6	5.1	11.7	2.1
Apr	55° / 32°	2.4	10	5.4	13.1	3.4
May	64° / 42°	3.0	12.3	1.5	14.3	5.3
Jun	76° / 51°	2.1	10.2	0	14.9	6.8
Jul	83° / 57°	1.6	9.3	0	14.7	6.3
Aug	81° / 56°	1.5	8.2	0	13.6	6.9
Sep	73° / 47°	1.5	6	0.4	12.3	7.5
Oct	59° / 36°	1.5	6.9	2.7	10.9	5.1
Nov	47° / 27°	0.8	4.7	4.4	9.7	1.7
Dec	38° / 21°	0.7	4.2	4.5	9.1	0.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 47% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 16% of December, with mostly cloudy or overcast conditions the remaining 37%.

	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 (%)	64	64	64	64	64	63	63	63	63	63	64	63	63	62	62	62	63	63	63	63	62	63	63	63	64	64	64	64	64	64	64
Cloudier (%)	36	36	36	36	36	37	37	37	37	37	36	37	37	38	38	38	37	37	37	37	38	37	37	37	36	36	36	36	36	36	36

	Clearer (%)	Cloudier (%)
1	64	36
2	64	36
3	64	36
4	64	36
5	64	36
6	63	37
7	63	37
8	63	37
9	63	37
10	63	37
11	64	36
12	63	37
13	63	37
14	62	38
15	62	38
16	62	38
17	63	37
18	63	37
19	63	37
20	63	37
21	62	38
22	63	37
23	63	37
24	63	37
25	64	36
26	64	36
27	64	36
28	64	36
29	64	36
30	64	36
31	64	36

Chance of precipitation in December

Any precipitationSnow

Cheyenne gets around 0.7 in of rain and snow over 4.2 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 14% and peaks near 15% on the wettest days, and about 5 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 (%)	13	13	13	12	12	12	12	12	13	13	13	13	13	13	14	14	14	14	15	15	15	15	15	15	15	15	15	14	14	14	14
Snow chance (%)	14	14	14	13	13	13	13	13	14	14	14	14	14	14	15	15	15	15	16	16	16	15	15	15	15	15	14	14	14	13	13

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

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December 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 December

Winds average 13 mph in December.

Across December, daily wind ranges from about 13 mph on the calmest days to 13 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)	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13
Feels	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy

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

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 18 min at the start of December to 9 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 7:11 AM to 7:30 AM, and sunset from 4:27 PM to 4:35 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)	9.3	9.2	9.2	9.2	9.2	9.2	9.1	9.1	9.1	9.1	9.1	9.1	9.1	9.1	9.1	9.1	9.0	9.0	9.0	9.0	9.0	9.0	9.0	9.0	9.0	9.0	9.0	9.1	9.1	9.1	9.1
Sunrise (AM)	7:11	7:12	7:13	7:14	7:15	7:16	7:17	7:18	7:19	7:20	7:20	7:21	7:22	7:23	7:23	7:24	7:25	7:25	7:26	7:26	7:27	7:27	7:28	7:28	7:29	7:29	7:29	7:30	7:30	7:30	7:30
Sunset (PM)	4:27	4:26	4:26	4:26	4:26	4:26	4:26	4:26	4:26	4:26	4:26	4:26	4:26	4:26	4:27	4:27	4:27	4:28	4:28	4:28	4:29	4:29	4:30	4:30	4:31	4:31	4:32	4:33	4:33	4:34	4:35

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	9.3	7:11	4:27
2	9.2	7:12	4:26
3	9.2	7:13	4:26
4	9.2	7:14	4:26
5	9.2	7:15	4:26
6	9.2	7:16	4:26
7	9.1	7:17	4:26
8	9.1	7:18	4:26
9	9.1	7:19	4:26
10	9.1	7:20	4:26
11	9.1	7:20	4:26
12	9.1	7:21	4:26
13	9.1	7:22	4:26
14	9.1	7:23	4:26
15	9.1	7:23	4:27
16	9.1	7:24	4:27
17	9.0	7:25	4:27
18	9.0	7:25	4:28
19	9.0	7:26	4:28
20	9.0	7:26	4:28
21	9.0	7:27	4:29
22	9.0	7:27	4:29
23	9.0	7:28	4:30
24	9.0	7:28	4:30
25	9.0	7:29	4:31
26	9.0	7:29	4:31
27	9.0	7:29	4:32
28	9.1	7:30	4:33
29	9.1	7:30	4:33
30	9.1	7:30	4:34
31	9.1	7:30	4:35

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.29 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.29 kWh/m² to a high of 7.28 kWh/m² in June across the year — December's 2.29 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)	2.4	2.4	2.4	2.4	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.4	2.4	2.4
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	2.4	Moderate
2	2.4	Moderate
3	2.4	Moderate
4	2.4	Moderate
5	2.3	Moderate
6	2.3	Moderate
7	2.3	Moderate
8	2.3	Moderate
9	2.3	Moderate
10	2.3	Moderate
11	2.3	Moderate
12	2.3	Moderate
13	2.3	Moderate
14	2.3	Moderate
15	2.3	Moderate
16	2.3	Moderate
17	2.3	Moderate
18	2.3	Moderate
19	2.3	Moderate
20	2.3	Moderate
21	2.3	Moderate
22	2.3	Moderate
23	2.3	Moderate
24	2.3	Moderate
25	2.3	Moderate
26	2.3	Moderate
27	2.3	Moderate
28	2.3	Moderate
29	2.4	Moderate
30	2.4	Moderate
31	2.4	Moderate

Planning a trip in December

Is December a good time to visit Cheyenne?

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

0.0

Sightseeing

11th-best month of the year

0.0

Beach & pool

8th-best month of the year

December is a weaker month for outdoor sightseeing in Cheyenne.

What to pack for Cheyenne in December

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

In December, Cheyenne sees daytime highs around 38°F and nights near 21°F. Pack a warm layer and a heavy coat. Worth having: a windbreaker. About 4 days see rain.

a warm layera heavy coata windbreaker

UV index in Cheyenne in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cheyenne peaks around July 13 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	2	3	7	6	8	10	11	9	7	5	3	2
Level	Low	Moderate	High	High	Very high	Extreme	Extreme	Very high	Very high	Moderate	Moderate	Low

	UV index (midday)	Level
Jan	2	Low
Feb	3	Moderate
Mar	7	High
Apr	6	High
May	8	Very high
Jun	10	Extreme
Jul	11	Extreme
Aug	9	Very high
Sep	7	Very high
Oct	5	Moderate
Nov	3	Moderate
Dec	2	Low

Air quality in Cheyenne in December

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Cheyenne is worst in September — around 15 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (November, 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)	7	8	10	9	10	10	11	14	15	13	6	6
Level	Good	Good	Good	Good	Good	Good	Good	Moderate	Moderate	Moderate	Good	Good

	PM2.5 (µg/m³)	Level
Jan	7	Good
Feb	8	Good
Mar	10	Good
Apr	9	Good
May	10	Good
Jun	10	Good
Jul	11	Good
Aug	14	Moderate
Sep	15	Moderate
Oct	13	Moderate
Nov	6	Good
Dec	6	Good

Location & terrain

Where is Cheyenne?

Cheyenne sits at 41.1°N, 104.8°W, 6,089 ft above sea level, in United States. The nearest listed city is Fort Collins, 41 mi away.

Topography around Cheyenne

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

Within 2 miles, the terrain around Cheyenne has only modest variations in elevation — a maximum elevation change of 184 ft around an average of 6,099 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 984 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 5,801 ft.

The land around Cheyenne is covered by artificial surfaces (57%) and grassland (32%) within 2 miles, grassland (90%) within 10 miles, and grassland (83%) within 50 miles.

2 miles

184 ft

artificial surfaces 57%

10 miles

984 ft

grassland 90%

50 miles

5,801 ft

grassland 83%

treesgrasslandcroplandartificial surfacesbare terrainwater

← November Cheyenne year-round climate January →Best places to visit in December

December weather nearby: Fort Collins 41 mi · Laramie 42 mi · Windsor 46 mi · Greeley 50 mi · Loveland 53 mi · Evans 53 mi · Estes Park 64 mi · Longmont 69 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 Cheyenne (41.14°, -104.8203°, elevation 6,089 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	41	23
2	41	23
3	41	23
4	40	22
5	40	22
6	40	22
7	40	22
8	39	22
9	39	22
10	39	22
11	39	21
12	39	21
13	38	21
14	38	21
15	38	21
16	38	21
17	38	20
18	38	20
19	38	20
20	37	20
21	37	20
22	37	20
23	37	20
24	37	20
25	37	20
26	37	20
27	37	20
28	37	20
29	37	20
30	37	19
31	37	19

	Clearer (%)	Cloudier (%)
1	64	36
2	64	36
3	64	36
4	64	36
5	64	36
6	63	37
7	63	37
8	63	37
9	63	37
10	63	37
11	64	36
12	63	37
13	63	37
14	62	38
15	62	38
16	62	38
17	63	37
18	63	37
19	63	37
20	63	37
21	62	38
22	63	37
23	63	37
24	63	37
25	64	36
26	64	36
27	64	36
28	64	36
29	64	36
30	64	36
31	64	36

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

	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	41	23
2	41	23
3	41	23
4	40	22
5	40	22
6	40	22
7	40	22
8	39	22
9	39	22
10	39	22
11	39	21
12	39	21
13	38	21
14	38	21
15	38	21
16	38	21
17	38	20
18	38	20
19	38	20
20	37	20
21	37	20
22	37	20
23	37	20
24	37	20
25	37	20
26	37	20
27	37	20
28	37	20
29	37	20
30	37	19
31	37	19

	Clearer (%)	Cloudier (%)
1	64	36
2	64	36
3	64	36
4	64	36
5	64	36
6	63	37
7	63	37
8	63	37
9	63	37
10	63	37
11	64	36
12	63	37
13	63	37
14	62	38
15	62	38
16	62	38
17	63	37
18	63	37
19	63	37
20	63	37
21	62	38
22	63	37
23	63	37
24	63	37
25	64	36
26	64	36
27	64	36
28	64	36
29	64	36
30	64	36
31	64	36

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

	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	41	23
2	41	23
3	41	23
4	40	22
5	40	22
6	40	22
7	40	22
8	39	22
9	39	22
10	39	22
11	39	21
12	39	21
13	38	21
14	38	21
15	38	21
16	38	21
17	38	20
18	38	20
19	38	20
20	37	20
21	37	20
22	37	20
23	37	20
24	37	20
25	37	20
26	37	20
27	37	20
28	37	20
29	37	20
30	37	19
31	37	19

	Clearer (%)	Cloudier (%)
1	64	36
2	64	36
3	64	36
4	64	36
5	64	36
6	63	37
7	63	37
8	63	37
9	63	37
10	63	37
11	64	36
12	63	37
13	63	37
14	62	38
15	62	38
16	62	38
17	63	37
18	63	37
19	63	37
20	63	37
21	62	38
22	63	37
23	63	37
24	63	37
25	64	36
26	64	36
27	64	36
28	64	36
29	64	36
30	64	36
31	64	36

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

	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