Millville weather in December

In December, Millville sees average daytime highs of 47°F and overnight lows near 33°F, with 3.7 in of precipitation across 9.3 wet days and about 9.3 hours of daylight. It is the 10th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 50°F in the first days to 44°F by the end. The sky is clear or mostly clear about 34% 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 18 min by month's end. Set against the rest of the year, December is Millville's 6th-clearest and 5th-windiest month. For the whole year in context, see Millville's year-round climate.

Daytime high
47°
10th warmest
Overnight low
33°
3rd coldest
Precipitation
3.7 in
9.3 wet days
Daylight
9 h 12 min
7:19 AM – 4:33 PM
Cloud cover
59%
6th clearest
Wind
8 mph
5th windiest
Solar energy
1.91 kWh/m²
Travel score
1.5
out of 10

Millville is city in Cumberland County, New Jersey, United States.

Density
245/km²
people per km²
Founded
1720

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 50°F in the first days to 44°F by the end.

A typical December day in Millville reaches about 47°F in the afternoon and slips back to 33°F overnight — a 14°F spread between the day's warmth and the night's chill. On most days the high lands between 34°F and 60°F. Set against its neighbours, December runs about 9°F cooler than November and about 4°F warmer than January.

20°40°60°151015202531
Avg high (°F)Avg low (°F)
15137
25136
35036
45036
54935
64935
74935
84835
94834
104834
114734
124734
134733
144733
154733
164633
174633
184633
194632
204632
214632
224632
234532
244532
254531
264531
274531
284531
294431
304431
314431

How December really feels in Millville

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.

Millville weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan42° / 29°3.19.13.19.50.3
Feb45° / 30°3.08.7310.51.0
Mar53° / 37°4.010.41.711.73.0
Apr64° / 46°3.410.30.3135.6
May73° / 55°3.410.8014.16.5
Jun82° / 65°3.811014.75.9
Jul86° / 70°3.811.7014.54.8
Aug84° / 69°4.611013.55.5
Sep78° / 62°4.09.2012.36.9
Oct67° / 51°3.78.30116.4
Nov56° / 40°2.97.60.29.84.0
Dec47° / 33°3.79.31.59.31.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% 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 53%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14951
24951
34852
44753
54654
64555
74555
84456
94357
104357
114258
124357
134357
144357
154357
164555
174555
184654
194753
204753
214951
224951
235050
245149
255149
265149
275149
285149
295248
305149
315149

Chance of precipitation in December

Any precipitationSnow

Millville gets around 3.7 in of rain and snow over 9.3 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 30% and peaks near 32% on the wettest days, and about 2 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1283
2293
3293
4304
5304
6314
7314
8324
9324
10324
11324
12324
13324
14324
15324
16314
17314
18315
19305
20305
21295
22295
23285
24285
25285
26285
27286
28286
29286
30286
31296

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 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1964
2973
3973
4973
5973
6973
7973
8982
9982
10982
11982
12982
13982
14991
15991
16991
17991
18991
19991
20991
21991
22991
23991
24991
25991
26991
27991
28991
29991
30991
31991

Wind in December

Winds average 8 mph in December.

Across December, daily wind ranges from about 8 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze
318light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 24 min at the start of December to 9 h 18 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 7:07 AM to 7:26 AM, and sunset from 4:33 PM to 4:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.47:074:33
29.47:084:32
39.47:094:32
49.47:104:32
59.47:114:32
69.37:124:32
79.37:134:32
89.37:134:32
99.37:144:32
109.37:154:32
119.37:164:32
129.37:174:32
139.37:174:33
149.27:184:33
159.27:194:33
169.27:194:33
179.27:204:34
189.27:204:34
199.27:214:34
209.27:224:35
219.27:224:35
229.27:234:36
239.27:234:36
249.27:234:37
259.27:244:37
269.27:244:38
279.27:254:38
289.27:254:39
299.27:254:40
309.27:254:40
319.37:264:41

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.91 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.91 kWh/m² to a high of 6.3 kWh/m² in June across the year — December's 1.91 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.1Moderate
22.0Moderate
32.0Moderate
42.0Dim
52.0Dim
61.9Dim
71.9Dim
81.9Dim
91.9Dim
101.9Dim
111.9Dim
121.9Dim
131.9Dim
141.9Dim
151.9Dim
161.9Dim
171.9Dim
181.9Dim
191.9Dim
201.9Dim
211.9Dim
221.9Dim
231.9Dim
241.9Dim
251.9Dim
261.9Dim
271.9Dim
281.9Dim
292.0Dim
302.0Dim
312.0Dim
Planning a trip in December

Hazard calendar for Millville

In seasonPeak

None of Millville's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Millville sits in the Atlantic hurricane belt; the season peaks August–October.

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

Is December a good time to visit Millville?

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

1.5
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 Millville.

What to pack for Millville in December

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

In December, Millville sees daytime highs around 47°F and nights near 33°F. Pack a warm layer. Worth having: rain gear. About 9 days see rain.

a warm layerrain gear

Sea temperature near Millville in December

The nearest coast averages about 45°F in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 20 mi away) is warmest in August at about 76°F and coldest in February near 37°F.

It's comfortable for a long swim from Jun 20 to Oct 3 — about 3.5 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan39Bracing
Feb37Bracing
Mar41Bracing
Apr48Bracing
May57Bracing
Jun67Cool
Jul74Refreshing
Aug76Warm
Sep73Refreshing
Oct65Cool
Nov54Bracing
Dec45Bracing

UV index in Millville 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 Millville peaks around July 11 at about 8 (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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 11UV 8Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Millville 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 Millville is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1317 µg/m³Nov 129 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar15Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul18Moderate
Aug15Moderate
Sep12Good
Oct9Good
Nov9Good
Dec10Good
Location & terrain

Where is Millville?

Millville sits at 39.4°N, 75.0°W, 39 ft above sea level, in United States. The nearest listed city is South Vineland, 3.1 mi away.

Topography around Millville

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

Within 2 miles, the terrain around Millville has only modest variations in elevation — a maximum elevation change of 128 ft around an average of 52 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 174 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 748 ft.

The land around Millville is covered by trees (50%) and artificial surfaces (22%) within 2 miles, trees (68%) within 10 miles, and trees (43%) and water (30%) within 50 miles.

2 miles
128 ft
10 miles
174 ft
50 miles
748 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: South Vineland 3.1 mi · Vineland 5.6 mi · Bridgeton 11 mi · Williamstown 20 mi · Glassboro 21 mi · Sicklerville 22 mi · Sewell 26 mi · Pleasantville 27 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 Millville (39.4021°, -75.0393°, elevation 39 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).