Cumberland weather in December

In December, Cumberland sees average daytime highs of 40°F and overnight lows near 27°F, with 3.2 in of precipitation across 8.9 wet days and about 9.2 hours of daylight. It is the 10th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 44°F in the first days to 38°F by the end. The sky is clear or mostly clear about 21% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 24 min at the start of December to 9 h 12 min by month's end. Set against the rest of the year, December is Cumberland's 11th-clearest and 4th-windiest month. For the whole year in context, see Cumberland's year-round climate.

Daytime high
40°
10th warmest
Overnight low
27°
3rd coldest
Precipitation
3.2 in
8.9 wet days
Daylight
9 h 12 min
7:35 AM – 4:47 PM
Cloud cover
68%
11th clearest
Wind
7 mph
4th windiest
Solar energy
1.71 kWh/m²
Travel score
0.1
out of 10

Cumberland is city in Allegany County, Maryland, United States.

Density
769/km²
people per km²
Founded
1787

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 44°F in the first days to 38°F by the end.

A typical December day in Cumberland reaches about 40°F in the afternoon and slips back to 27°F overnight — a 13°F spread between the day's warmth and the night's chill. On most days the high lands between 28°F and 54°F. Set against its neighbours, December runs about 10°F cooler than November and about 4°F warmer than January.

20°40°60°151015202531
Avg high (°F)Avg low (°F)
14531
24430
34430
44330
54329
64329
74229
84229
94228
104128
114128
124128
134027
144027
154027
164027
174027
183926
193926
203926
213926
223926
233926
243926
253926
263825
273825
283825
293825
303825
313825

How December really feels in Cumberland

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
wind chill below the day's low

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

Cumberland weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan37° / 22°3.19.55.39.50.0
Feb40° / 24°2.88.84.910.40.1
Mar48° / 31°3.811.13.711.71.8
Apr61° / 42°3.811.80.6134.7
May69° / 51°4.113.3014.25.9
Jun78° / 59°3.911.5014.76.4
Jul82° / 64°3.310.9014.56.3
Aug80° / 62°2.69.7013.66.6
Sep74° / 55°4.19.7012.36.9
Oct62° / 44°3.38.40.310.95.5
Nov50° / 34°3.18.41.19.82.4
Dec40° / 27°3.28.949.20.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 14% of December, with mostly cloudy or overcast conditions the remaining 65%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13763
23664
33565
43565
53466
63466
73367
83367
93268
103268
113268
123268
133367
143367
153367
163466
173466
183466
193565
203565
213664
223664
233763
243763
253763
263763
273763
283763
293763
303763
313763

Chance of precipitation in December

Any precipitationSnow

Cumberland gets around 3.2 in of rain and snow over 8.9 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 29% and peaks near 31% on the wettest days, and about 4 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1319
23110
33110
43011
53011
63012
73112
83113
93113
103114
113114
123114
133114
143114
153114
163014
173014
183014
192914
202913
212813
222813
232713
242712
252612
262612
272612
282612
292712
302712
312813

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 7 mph in December.

Across December, daily wind ranges from about 7 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 24 min at the start of December to 9 h 12 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 7:23 AM to 7:41 AM, and sunset from 4:47 PM to 4:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.47:234:47
29.47:244:47
39.47:254:47
49.37:264:46
59.37:264:46
69.37:274:46
79.37:284:46
89.37:294:46
99.37:304:46
109.37:314:46
119.37:314:46
129.27:324:47
139.27:334:47
149.27:344:47
159.27:344:47
169.27:354:47
179.27:364:48
189.27:364:48
199.27:374:48
209.27:374:49
219.27:384:49
229.27:384:50
239.27:394:50
249.27:394:51
259.27:404:51
269.27:404:52
279.27:404:52
289.27:414:53
299.27:414:54
309.27:414:54
319.27:414:55

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.71 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.71 kWh/m² to a high of 6.04 kWh/m² in June across the year — December's 1.71 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.8Dim
21.8Dim
31.8Dim
41.8Dim
51.8Dim
61.7Dim
71.7Dim
81.7Dim
91.7Dim
101.7Dim
111.7Dim
121.7Dim
131.7Dim
141.7Dim
151.7Dim
161.7Dim
171.7Dim
181.7Dim
191.7Dim
201.7Dim
211.7Dim
221.7Dim
231.7Dim
241.7Dim
251.7Dim
261.7Dim
271.7Dim
281.8Dim
291.8Dim
301.8Dim
311.8Dim
Planning a trip in December

Is December a good time to visit Cumberland?

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

0.1
Sightseeing
10th-best month of the year
0.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Cumberland.

What to pack for Cumberland in December

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

In December, Cumberland sees daytime highs around 40°F and nights near 27°F. Pack a warm layer and a heavy coat. Worth having: rain gear. About 9 days see rain.

a warm layera heavy coatrain gear

UV index in Cumberland 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 Cumberland peaks around June 20 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJun 20UV 9Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec2Low

Air quality in Cumberland 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 Cumberland is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (November, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1316 µg/m³Nov 157 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar11Good
Apr11Good
May14Moderate
Jun15Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct7Good
Nov7Good
Dec7Good
Location & terrain

Where is Cumberland?

Cumberland sits at 39.7°N, 78.8°W, 627 ft above sea level, in United States. The nearest listed city is Martinsburg, 45 mi away.

Topography around Cumberland

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

Within 2 miles, the terrain around Cumberland has significant variations in elevation — a maximum elevation change of 1,106 ft around an average of 853 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,398 ft; within 50 miles, large variations in elevation — a maximum elevation change of 3,924 ft.

The land around Cumberland is covered by trees (63%) and artificial surfaces (24%) within 2 miles, trees (82%) within 10 miles, and trees (79%) within 50 miles.

2 miles
1,106 ft
10 miles
2,398 ft
50 miles
3,924 ft
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Martinsburg 45 mi · Winchester 45 mi · Johnstown 47 mi · Hagerstown 55 mi · Front Royal 59 mi · Chambersburg 62 mi · Altoona 63 mi · Morgantown 63 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 Cumberland (39.6529°, -78.7625°, elevation 627 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).