Measurements:
°C
°F
CURRENT WEATHER
01:14
Thunder Bay
28°F
SE 8 mph
Feels like: 20°F
Precip: 0%
World Resorts Canada Thunder Bay Weather December Weather in Thunder Bay

Thunder Bay Weather: December

Average Day Temperature: 19.5°F
Average Night Temperature: 17.3°F
Sea Water Temperature: 37.3°F
Number of Sunny Days: 5 days
Sunshine Hours: 8.3 - 8.6 hours
Number of Rainy Days: 0 days
Precipitation Totals: 0.6 in
Number of Snowy Days: 1 day
detailed information

Air Temperature in December, °F

Select Year: 2024 2023 2022
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
-19
-10
-1
8
17
26
35
44
53
Day Temperature   
Night Temperature

The highest day temperature in December 2024 was 36°F. The lowest night temperature was -10°F. The average values for day and night temperatures during December were 21.1°F и 17.5°F respectivly.

Thunder Bay Water Sea Temperature in December, °F

Select Year: 2024 2023 2022
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
29
32
35
38
41
44
47

The average sea surface temperature in December 2024 for Thunder Bay was 38.0°F. The maximum and minimum values were 34.4°F and 42.2°F respectively.

Sunny, Cloudy and Gloomy days
Sunny days
Cloudy days
Gloomy days
16%
26%
58%

Most of the days in December are gloomy but you can also expect sunny days.

Precipitation Totals in December, in

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
0.0
0.2
0.4
0.7
0.9
1.1
1.3
1.6

Precipitation total in December for Thunder Bay is 0.6 in. It makes december one of the least rainy months of the year.

Wind Speed in December, mph
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
0.0
1.6
3.3
4.9
6.6
8.2
9.9
11.5
13.2

The average wind speed in December is 9.1 mph. It makes December one of the most windy months of the year for Thunder Bay.

Average Sunny Hours Per Day
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
0.0
1.6
3.3
4.9
6.5
8.2
9.8
11.4

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Thunder Bay in December is 3.0 hours.

Best Time to Visit Thunder Bay
The most sunny months:
September 15 days
August 14 days
July 12 days
The most warm months:
July 71.4 °F
August 71.1 °F
June 64.2 °F
Warmest sea temperature:
August 65.0 °F
September 61.4 °F
July 60.3 °F
The most cold months:
February 10.3 °F
January 10.9 °F
December 19.5 °F
The most rainy months:
August 3 days
September 2 days
April 2 days
The most windy months:
November 9 mph
December 9 mph
April 9 mph
more details

Thunder Bay on the Weather Map

Canada Resorts:
NAME
F°
Halifax +32
Moncton +30
Montreal +38
Niagara Falls +42
Ottawa +36
Prince Edward Island +30
Quebec +30
Saint John +30
St. John's +24
Sydney +28
Toronto +40
Vancouver +58
Victoria +46
Winnipeg +26
Yellowknife +12
all resorts
24 Hours Weather Forecast
Thunder Bay
Local time: 01:14
06 apr, sunday
0300 26°F
E
5 mph
0600 26°F
E
5 mph
0900 28°F
SE
6 mph
1200 30°F
SE
7 mph
1500 34°F
SE
8 mph
1800 30°F
SE
11 mph
2100 26°F
S
11 mph
07 apr, monday
0000 20°F
S
10 mph