Back Mountain weather in December

In December, Back Mountain sees average daytime highs of 38°F and overnight lows near 26°F, with 3.3 in of precipitation across 10.1 wet days and about 9.1 hours of daylight. It is the 10th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 41°F in the first days to 36°F by the end. The sky is clear or mostly clear about 16% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 12 min at the start of December to 9 h 06 min by month's end. Set against the rest of the year, December is Back Mountain's 11th-clearest and 4th-windiest month. For the whole year in context, see Back Mountain's year-round climate.

Daytime high
38°
10th warmest
Overnight low
26°
3rd coldest
Precipitation
3.3 in
10.1 wet days
Daylight
9 hours
7:29 AM – 4:31 PM
Cloud cover
72%
11th clearest
Wind
7 mph
4th windiest
Solar energy
1.59 kWh/m²
Travel score
0.0
out of 10

Back Mountain is unincorporated community.

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 41°F in the first days to 36°F by the end.

A typical December day in Back Mountain reaches about 38°F in the afternoon and slips back to 26°F overnight — a 12°F spread between the day's warmth and the night's chill. On most days the high lands between 26°F and 50°F. Set against its neighbours, December runs about 10°F cooler than November and about 5°F warmer than January.

20°40°60°151015202531
Avg high (°F)Avg low (°F)
14230
24230
34129
44129
54129
64028
74028
83928
93927
103927
113827
123826
133826
143826
153826
163726
173725
183725
193725
203725
213725
223725
233724
243624
253624
263624
273624
283624
293624
303523
313523

How December really feels in Back Mountain

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.

Back Mountain 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
Jan33° / 20°3.19.46.49.40.0
Feb36° / 21°2.695.610.30.0
Mar45° / 29°3.6114.611.71.0
Apr58° / 40°3.611.41.213.14.0
May68° / 49°3.512.5014.35.8
Jun76° / 58°3.911.8014.96.4
Jul81° / 63°3.010.6014.76.4
Aug79° / 62°3.39.7013.76.7
Sep72° / 54°3.99.1012.36.8
Oct60° / 44°3.69.30.310.94.8
Nov48° / 34°3.18.51.69.71.8
Dec38° / 26°3.310.159.10.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 71%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13070
23070
32971
42971
52971
62872
72872
82872
92773
102872
112872
122872
132872
142872
152971
162971
172872
182872
192872
202971
212971
222971
232971
242971
252971
262971
272872
282872
292872
302872
312872

Chance of precipitation in December

Any precipitationSnow

Back Mountain gets around 3.3 in of rain and snow over 10.1 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 32% and peaks near 35% on the wettest days, and about 5 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
13212
23313
33314
43315
53415
63416
73417
83517
93518
103518
113518
123419
133418
143418
153418
163417
173317
183317
193216
203216
213115
223115
233014
243014
253014
263014
273014
283014
293015
303115
313116

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 8 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
237light breeze
247light breeze
257light breeze
267light breeze
277light breeze
287light breeze
298light breeze
308light breeze
318light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 12 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 6 minutes over December. Sunrise moves from 7:17 AM to 7:36 AM, and sunset from 4:31 PM to 4:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.27:174:31
29.27:184:31
39.27:194:30
49.27:204:30
59.27:214:30
69.17:214:30
79.17:224:30
89.17:234:30
99.17:244:30
109.17:254:30
119.17:264:30
129.17:264:30
139.17:274:30
149.07:284:31
159.07:294:31
169.07:294:31
179.07:304:31
189.07:314:32
199.07:314:32
209.07:324:32
219.07:324:33
229.07:334:33
239.07:334:34
249.07:344:34
259.07:344:35
269.07:344:35
279.07:354:36
289.07:354:37
299.07:354:37
309.07:354:38
319.17:364:39

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.59 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.59 kWh/m² to a high of 5.99 kWh/m² in June across the year — December's 1.59 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.7Dim
21.6Dim
31.6Dim
41.6Dim
51.6Dim
61.6Dim
71.6Dim
81.6Dim
91.6Dim
101.6Dim
111.6Dim
121.6Dim
131.6Dim
141.6Dim
151.6Dim
161.6Dim
171.6Dim
181.6Dim
191.6Dim
201.6Dim
211.6Dim
221.6Dim
231.6Dim
241.6Dim
251.6Dim
261.6Dim
271.6Dim
281.6Dim
291.6Dim
301.6Dim
311.6Dim
Planning a trip in December

Is December a good time to visit Back Mountain?

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
9th-best month of the year

December is a weaker month for outdoor sightseeing in Back Mountain.

What to pack for Back Mountain in December

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

In December, Back Mountain sees daytime highs around 38°F and nights near 26°F. Pack a warm layer and a heavy coat. Worth having: rain gear. About 10 days see rain.

a warm layera heavy coatrain gear

UV index in Back Mountain 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 Back Mountain peaks around July 10 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 highHighModerateLowJul 10UV 8Dec 22UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun8Very high
Jul9Very high
Aug6High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Back Mountain 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 Back Mountain is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (November, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1416 µg/m³Nov 147 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar11Good
Apr12Good
May15Moderate
Jun15Moderate
Jul16Moderate
Aug13Moderate
Sep11Good
Oct7Good
Nov7Good
Dec8Good
Location & terrain

Where is Back Mountain?

Back Mountain sits at 41.3°N, 76.0°W, 1,276 ft above sea level, in United States. The nearest listed city is Wilkes-Barre, 8.7 mi away.

Topography around Back Mountain

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

Within 2 miles, the terrain around Back Mountain has only modest variations in elevation — a maximum elevation change of 617 ft around an average of 1,306 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,864 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,372 ft.

The land around Back Mountain is covered by trees (70%) and grassland (21%) within 2 miles, trees (77%) within 10 miles, and trees (80%) within 50 miles.

2 miles
617 ft
10 miles
1,864 ft
50 miles
2,372 ft
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Wilkes-Barre 8.7 mi · Scranton 18 mi · Hazleton 26 mi · Vestal 52 mi · Williamsport 53 mi · Binghamton 53 mi · Whitehall Township 53 mi · Allentown 57 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 Back Mountain (41.3359°, -75.9963°, elevation 1,276 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).