Killingly Center weather in December

In December, Killingly Center sees average daytime highs of 42°F and overnight lows near 28°F, with 4.3 in of precipitation across 10.3 wet days and about 9 hours of daylight. It is the 10th-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 45°F in the first days to 39°F by the end. The sky is clear or mostly clear about 32% 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 hours by month's end. Set against the rest of the year, December is Killingly Center's 7th-clearest and 4th-windiest month. For the whole year in context, see Killingly Center's year-round climate.

Daytime high
42°
10th warmest
Overnight low
28°
3rd coldest
Precipitation
4.3 in
10.3 wet days
Daylight
9 hours
7:14 AM – 4:13 PM
Cloud cover
60%
7th clearest
Wind
8 mph
4th windiest
Solar energy
1.67 kWh/m²
Travel score
0.3
out of 10

Killingly Center is unincorporated community in Killingly, Windham County, Connecticut, United States.

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 45°F in the first days to 39°F by the end.

A typical December day in Killingly Center reaches about 42°F in the afternoon and slips back to 28°F overnight — a 14°F spread between the day's warmth and the night's chill. On most days the high lands between 30°F and 55°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)
14632
24631
34531
44531
54430
64430
74430
84329
94329
104229
114228
124228
134228
144128
154128
164128
174127
184127
194027
204027
214027
224027
234026
244026
254026
264026
273926
283926
293925
303925
313925

How December really feels in Killingly Center

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.

Killingly Center weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan37° / 22°3.59.85.49.30.0
Feb39° / 23°3.18.74.910.30.0
Mar46° / 30°4.310.54.311.71.3
Apr58° / 40°3.810.90.813.14.1
May68° / 49°3.210.8014.36.0
Jun77° / 59°3.710.50156.6
Jul83° / 65°3.511.1014.75.7
Aug81° / 64°4.110.6013.76.4
Sep73° / 56°3.78.5012.37.0
Oct62° / 46°4.19.40.210.95.4
Nov51° / 36°3.58.80.89.62.6
Dec42° / 28°4.310.34.190.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 53%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15050
24951
35050
44951
54852
64852
74753
84753
94753
104654
114654
124555
134555
144555
154555
164456
174456
184456
194456
204555
214753
224753
234753
244753
254852
264951
274951
284951
294852
304951
314951

Chance of precipitation in December

Any precipitationSnow

Killingly Center gets around 4.3 in of rain and snow over 10.3 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 33% and peaks near 34% on the wettest days, and about 4 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1319
23110
33211
43212
53213
63313
73314
83314
93415
103415
113415
123415
133415
143414
153314
163313
173313
183313
193312
203312
213212
223212
233212
243212
253212
263312
273313
283313
293314
303314
313315

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 (%)Comfortable (%)
1991
2991
3991
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000
311000

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 12 min at the start of December to 9 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 7:02 AM to 7:21 AM, and sunset from 4:13 PM to 4:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.27:024:13
29.27:034:12
39.17:044:12
49.17:054:12
59.17:064:12
69.17:074:12
79.17:074:12
89.17:084:12
99.07:094:12
109.07:104:12
119.07:114:12
129.07:124:12
139.07:124:12
149.07:134:12
159.07:144:13
169.07:144:13
179.07:154:13
189.07:164:13
199.07:164:14
209.07:174:14
219.07:174:15
229.07:184:15
239.07:184:16
249.07:194:16
259.07:194:17
269.07:194:17
279.07:204:18
289.07:204:18
299.07:204:19
309.07:214:20
319.07:214:21

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.67 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.67 kWh/m² to a high of 5.95 kWh/m² in June across the year — December's 1.67 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.8Dim
21.8Dim
31.8Dim
41.7Dim
51.7Dim
61.7Dim
71.7Dim
81.7Dim
91.7Dim
101.7Dim
111.7Dim
121.6Dim
131.6Dim
141.6Dim
151.6Dim
161.6Dim
171.6Dim
181.6Dim
191.6Dim
201.6Dim
211.6Dim
221.6Dim
231.6Dim
241.7Dim
251.7Dim
261.7Dim
271.7Dim
281.7Dim
291.7Dim
301.7Dim
311.7Dim
Planning a trip in December

Hazard calendar for Killingly Center

In seasonPeak

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

Killingly Center 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 Killingly Center?

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

0.3
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 Killingly Center.

What to pack for Killingly Center in December

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

In December, Killingly Center sees daytime highs around 42°F and nights near 28°F. Pack a warm layer and a heavy coat. Worth having: rain gear. About 10 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Killingly Center in December

The nearest coast averages about 48°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 34 mi away) is warmest in August at about 69°F and coldest in February near 39°F.

It's comfortable for a long swim from Jul 29 to Aug 30 — about 1.1 months when the water holds above 68°F.

40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°F)Comfort
Jan43Bracing
Feb39Bracing
Mar40Bracing
Apr44Bracing
May51Bracing
Jun60Cool
Jul67Cool
Aug69Refreshing
Sep67Cool
Oct62Cool
Nov55Bracing
Dec48Bracing

UV index in Killingly Center 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 Killingly Center peaks around July 11 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 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 11UV 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun7Very high
Jul8Very high
Aug5High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low
Location & terrain

Where is Killingly Center?

Killingly Center sits at 41.8°N, 71.9°W, 338 ft above sea level, in United States. The nearest listed city is Plainfield, 11 mi away.

Topography around Killingly Center

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

Within 2 miles, the terrain around Killingly Center has only modest variations in elevation — a maximum elevation change of 525 ft around an average of 407 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 797 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,024 ft.

The land around Killingly Center is covered by trees (83%) within 2 miles, trees (88%) within 10 miles, and trees (75%) within 50 miles.

2 miles
525 ft
10 miles
797 ft
50 miles
2,024 ft
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Plainfield 11 mi · Coventry 14 mi · Smithfield 17 mi · Windham 17 mi · Southbridge 19 mi · Johnston 19 mi · Mansfield City 19 mi · Willimantic 20 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 Killingly Center (41.8387°, -71.8692°, elevation 338 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).