Sheridan weather in December

In December, Sheridan sees average daytime highs of 33°F and overnight lows near 14°F, with 1.0 in of precipitation across 7.3 wet days and about 8.7 hours of daylight. It is the 11th-warmest and 12th-wettest month of the year here.

Highs ease over the month, from about 35°F in the first days to 31°F by the end. The sky is clear or mostly clear about 36% of the time in December, and the air most often feels dry.

Daylight stretches from about 8 h 54 min at the start of December to 8 h 36 min by month's end. Set against the rest of the year, December is Sheridan's 6th-clearest and 2nd-windiest month. For the whole year in context, see Sheridan's year-round climate.

Daytime high
33°
11th warmest
Overnight low
14°
2nd coldest
Precipitation
1.0 in
7.3 wet days
Daylight
8 h 36 min
7:45 AM – 4:23 PM
Cloud cover
54%
6th clearest
Wind
5 mph
2nd windiest
Solar energy
1.81 kWh/m²
Travel score
0.0
out of 10

Sheridan is city in and county seat of Sheridan County, Wyoming, United States.

Density
630/km²
people per km²

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

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

A typical December day in Sheridan reaches about 33°F in the afternoon and slips back to 14°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 18°F and 46°F. Set against its neighbours, December runs about 8°F cooler than November and on par with January.

20°40°151015202531
Avg high (°F)Avg low (°F)
13517
23516
33516
43516
53415
63415
73415
83415
93315
103315
113314
123314
133314
143314
153314
163214
173213
183213
193213
203213
213213
223113
233113
243113
253112
263112
273112
283112
293112
303112
313112

How December really feels in Sheridan

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
0
heat index over the day's high
Days feeling ≤ 32°F
31
31 feel bitter (≤ 14°F)

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

Sheridan weather by month

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

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan32° / 14°1.17.88.790.0
Feb34° / 15°1.27.78.610.10.0
Mar43° / 22°2.110.710.111.60.6
Apr50° / 29°3.313.510.813.22.0
May58° / 37°3.914.57.114.64.0
Jun69° / 46°3.014.11.515.35.8
Jul78° / 52°2.011.10.1156.8
Aug77° / 51°1.5100.213.97.1
Sep67° / 43°2.29.12.712.36.5
Oct53° / 32°2.69.67.310.73.3
Nov41° / 21°1.48.27.99.40.4
Dec33° / 14°1.07.38.18.70.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% 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 47%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15347
25248
35248
45248
55248
65149
75149
85149
95248
105248
115248
125347
135347
145248
155248
165248
175347
185347
195347
205446
215446
225347
235446
245446
255446
265347
275347
285347
295347
305248
315248

Chance of precipitation in December

Any precipitationSnow

Sheridan gets around 1.0 in of rain and snow over 7.3 wet days in December, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 24% and peaks near 25% on the wettest days, and about 8 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
12528
22527
32427
42326
52326
62226
72225
82225
92225
102125
112225
122225
132225
142225
152326
162326
172326
182426
192426
202427
212427
222527
232527
242527
252527
262527
272527
282526
292526
302426
312426

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.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in December

Winds average 5 mph in December.

Across December, daily wind ranges from about 5 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
186calm
196calm
206calm
216calm
226calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 8 h 54 min at the start of December to 8 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over December. Sunrise moves from 7:32 AM to 7:52 AM, and sunset from 4:23 PM to 4:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.97:324:23
28.87:334:23
38.87:344:23
48.87:354:22
58.87:364:22
68.87:374:22
78.77:384:22
88.77:394:22
98.77:404:22
108.77:414:22
118.77:424:22
128.77:424:22
138.67:434:22
148.67:444:22
158.67:454:22
168.67:454:23
178.67:464:23
188.67:474:23
198.67:474:24
208.67:484:24
218.67:484:24
228.67:494:25
238.67:494:25
248.67:504:26
258.67:504:26
268.67:504:27
278.67:514:28
288.67:514:28
298.67:514:29
308.67:514:30
318.67:524:30

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.81 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.81 kWh/m² to a high of 7.14 kWh/m² in July across the year — December's 1.81 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.9Dim
21.9Dim
31.9Dim
41.9Dim
51.9Dim
61.8Dim
71.8Dim
81.8Dim
91.8Dim
101.8Dim
111.8Dim
121.8Dim
131.8Dim
141.8Dim
151.8Dim
161.8Dim
171.8Dim
181.8Dim
191.8Dim
201.8Dim
211.8Dim
221.8Dim
231.8Dim
241.8Dim
251.8Dim
261.8Dim
271.8Dim
281.8Dim
291.9Dim
301.9Dim
311.9Dim
Planning a trip in December

Is December a good time to visit Sheridan?

Our two travel scores rate December 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
7th-best month of the year

December is a weaker month for outdoor sightseeing in Sheridan.

What to pack for Sheridan in December

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

In December, Sheridan sees daytime highs around 33°F and nights near 14°F. Pack a warm layer and a heavy coat. About 7 days see rain.

a warm layera heavy coat

UV index in Sheridan in December

LowModerateHighVery highExtreme

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

Under clear skies, the midday UV index in Sheridan peaks around June 22 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 22UV 9Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5High
May7High
Jun9Very high
Jul8Very high
Aug7Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Sheridan 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 Sheridan is worst in August — around 20 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (November, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1320 µg/m³Nov 227 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb8Good
Mar10Good
Apr10Good
May10Good
Jun8Good
Jul18Moderate
Aug20Moderate
Sep15Moderate
Oct15Moderate
Nov7Good
Dec7Good
Location & terrain

Where is Sheridan?

Sheridan sits at 44.8°N, 107.0°W, 3,743 ft above sea level, in United States. The nearest listed city is Gillette, 80 mi away.

Topography around Sheridan

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

Within 2 miles, the terrain around Sheridan has only modest variations in elevation — a maximum elevation change of 341 ft around an average of 3,839 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,355 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 10,069 ft.

The land around Sheridan is covered by grassland (46%) and artificial surfaces (30%) within 2 miles, grassland (88%) within 10 miles, and grassland (73%) and trees (21%) within 50 miles.

2 miles
341 ft
10 miles
1,355 ft
50 miles
10,069 ft
treesgrasslandcroplandartificial surfacesbare terrainmoss and lichen
December weather nearby: Gillette 80 mi · Billings 101 mi · Casper 137 mi · Rapid City 190 mi · Bozeman 208 mi · Dickinson 247 mi · Rexburg 248 mi · Rock Springs 249 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
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

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 Sheridan (44.7972°, -106.9562°, elevation 3,743 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).