Killingly Center, United States — Weather in December 2026

Monthly climate averages for Killingly Center, United States. Based on 10-year ERA5 reanalysis data.

Cfa Humid Subtropical
1.6 /10
Poor

December is a poor month in Killingly Center

Climate Overview

Killingly Center, United States in December has cold conditions, with highs averaging around 5°C (41°F). Rain falls on about 10 days this month.

This month falls at the beginning of Winter. Cold conditions dominate the month.

Daily highs in December gradually drop from around 7°C (44°F) at the start to 4°C (40°F) by month's end.

December sees fairly even rainfall, totalling about 123 mm across the month.

Expect around 5.9h of sunshine at the start of December, decreasing to 4.8h by the end.

The warmest days tend to fall around the 1th, averaging 7.5°C (46°F).

Compared to November, this month is about 5°C cooler with 1 more rainy days.

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Monthly December Averages

Temperature
5°C / -2°C
Feels Like
1°C / -7°C
Rain
10 days · 123 mm
Sunshine
5.5h / day
Humidity
73% — Humid
Wind
18 km/h
Wind Direction
WNW (282°)
Gusts
42 km/h
Daylight
9.2 h
Cloud Cover
56%
Clear Sky Days
5.6
UV Index
2 — Low
Dew Point
-3°C — Dry
Moon Phase
Waxing Crescent · 31%
Snow Days
5 days · 13 cm
Frost Days
22 days

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

12°C 9°C 6°C 3°C 0°C -3°C -6°C 151015202531
HighLow

Daily Precipitation

0 mm 2 mm 4 mm 6 mm 8 mm 10 mm 151015202531
Rainfall

Daily Sunshine

0h 2h 4h 6h 8h 10h 151015202531
Sunshine

Daily Wind Speed

0 5 10 15 20 25 151015202531
Wind Speed
Sun Position
Sunrise 07:09
Daylight 9.2h
Sunset 16:19

What to Expect

Cold daytime highs of 5°C (41°F) mean shorter outdoor excursions with warming breaks.

Rain usually comes in shorter passing showers rather than all-day rain.

2 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

January
Poor
Temp
3°C / -4°C
Feels Like
-1°C / -9°C
Rain
10days (98 mm) Wet
Sun
5.9h Fair
Humidity
68% Muggy
UV
2.2 Moderate
Snow Days
7days
View Details
February
Poor
Temp
5°C / -4°C
Feels Like
1°C / -8°C
Rain
10days (86 mm) Wet
Sun
6.7h Fair
Humidity
70% Muggy
UV
3.2 Moderate
Snow Days
7days
View Details
March
Poor
Temp
9°C / -1°C
Feels Like
5°C / -5°C
Rain
11days (101 mm) Wet
Sun
7.9h Good
Humidity
66% Muggy
UV
4.4 Moderate
Snow Days
4days
View Details
April
Fair
Temp
14°C / 5°C
Feels Like
12°C / 1°C
Rain
11days (108 mm) Wet
Sun
8.4h Good
Humidity
68% Muggy
UV
5.1 High
Snow Days
1days
View Details
May
Good
Temp
20°C / 10°C
Feels Like
19°C / 8°C
Rain
11days (102 mm) Wet
Sun
9.4h Good
Humidity
73% Muggy
UV
6.2 High
View Details
June best
Excellent
Temp
25°C / 15°C
Feels Like
26°C / 15°C
Rain
11days (82 mm) Wet
Sun
10.7h Excellent
Humidity
72% Muggy
UV
6.8 High
View Details
July best
Excellent
Temp
28°C / 19°C
Feels Like
31°C / 21°C
Rain
13days (122 mm) Wet
Sun
10.9h Excellent
Humidity
75% Muggy
UV
7.1 Very High
View Details
August best
Excellent
Temp
27°C / 18°C
Feels Like
29°C / 20°C
Rain
12days (104 mm) Wet
Sun
10.2h Excellent
Humidity
75% Muggy
UV
6.5 High
View Details
September best
Excellent
Temp
23°C / 15°C
Feels Like
24°C / 15°C
Rain
9days (99 mm) Wet
Sun
8.3h Good
Humidity
77% Humid
UV
5.1 High
View Details
October best
Good
Temp
18°C / 10°C
Feels Like
16°C / 7°C
Rain
10days (104 mm) Wet
Sun
7h Good
Humidity
77% Humid
UV
3.9 Moderate
View Details
November
Poor
Temp
11°C / 3°C
Feels Like
7°C / -1°C
Rain
9days (77 mm) Wet
Sun
6.5h Fair
Humidity
72% Muggy
UV
2.7 Moderate
Snow Days
1days
View Details
December
Poor
Temp
5°C / -2°C
Feels Like
1°C / -7°C
Rain
10days (123 mm) Wet
Sun
5.5h Fair
Humidity
73% Muggy
UV
2 Low
Snow Days
5days
View Details
Month Temp Feels Like Rain Sun Humidity UV Status
January 3°C / -4°C -1°C / -9°C 10days (98 mm) Wet 5.9h Fair 68% Muggy 2.2 Moderate Poor View Details
February 5°C / -4°C 1°C / -8°C 10days (86 mm) Wet 6.7h Fair 70% Muggy 3.2 Moderate Poor View Details
March 9°C / -1°C 5°C / -5°C 11days (101 mm) Wet 7.9h Good 66% Muggy 4.4 Moderate Poor View Details
April 14°C / 5°C 12°C / 1°C 11days (108 mm) Wet 8.4h Good 68% Muggy 5.1 High Fair View Details
May 20°C / 10°C 19°C / 8°C 11days (102 mm) Wet 9.4h Good 73% Muggy 6.2 High Good View Details
June best 25°C / 15°C 26°C / 15°C 11days (82 mm) Wet 10.7h Excellent 72% Muggy 6.8 High Excellent View Details
July best 28°C / 19°C 31°C / 21°C 13days (122 mm) Wet 10.9h Excellent 75% Muggy 7.1 Very High Excellent View Details
August best 27°C / 18°C 29°C / 20°C 12days (104 mm) Wet 10.2h Excellent 75% Muggy 6.5 High Excellent View Details
September best 23°C / 15°C 24°C / 15°C 9days (99 mm) Wet 8.3h Good 77% Humid 5.1 High Excellent View Details
October best 18°C / 10°C 16°C / 7°C 10days (104 mm) Wet 7h Good 77% Humid 3.9 Moderate Good View Details
November 11°C / 3°C 7°C / -1°C 9days (77 mm) Wet 6.5h Fair 72% Muggy 2.7 Moderate Poor View Details
December 5°C / -2°C 1°C / -7°C 10days (123 mm) Wet 5.5h Fair 73% Muggy 2 Low Poor View Details

What to Wear

Full winter gear is a must — insulated coat, thermal base layers, warm hat, gloves, and waterproof boots.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

Warm coatThermal base layersScarf & glovesUmbrellaWaterproof jacketComfortable walking shoes

Frequently Asked Questions

December is typically poor for visiting Killingly Center, with average highs of 5°C (41°F) and around 10 rainy days. Killingly Center, United States in December has cold conditions, with highs averaging around 5°C (41°F). Rain falls on a
Killingly Center typically sees around 10 rainy days in December with 123 mm (4.8 in) of total rainfall. An umbrella should suffice.
Yes, nights in Killingly Center during December are cold, averaging -2°C (28°F). Pack warm layers and a coat for evenings.
With highs of 5°C (41°F) and lows of -2°C (28°F) in December, we recommend: Warm coat, Thermal base layers, Scarf & gloves, Umbrella, Waterproof jacket. Comfortable walking shoes are essential.
December is not the most favourable month weather-wise in Killingly Center. Consider visiting during months with milder temperatures or less rainfall for a better experience.
The average UV index in Killingly Center during December is 2 (low). No special sun protection is needed.
Killingly Center gets approximately 9 hours of daylight per day in December, with around 6 hours of sunshine.
Yes, Killingly Center typically sees around 5 snow days in December with roughly 13 cm (5 in) of snowfall.

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