< Previous Month Next Month >

Hamilton December Weather

Averages and records for weather in Hamilton, Ontario in the month of December.

Typical Hamilton December Weather 1991–2020
Average daily high	2.8 °C
Average daily low	-4.0 °C
Average monthly precipitation	5.7 cm
Daily chance of precipitation	40.7%

Hamilton December Weather Records 1866–2024
Highest temperature	21.2 °C	December 3, 1982
Lowest temperature	-27.8 °C	December 21, 1871
Highest daily low	12.8 °C	December 8, 1966
Lowest daily high	-16.7 °C	December 29, 1917
Hottest average high temperature	7.8 °C	2015
Coldest average high temperature	-4.5 °C	1989
Most daily precipitation	4.8 cm	December 27, 1942
Most monthly precipitation	15.5 cm	1990

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°C)		Record (°C)
Day	High	Low	High	Low
December 1	5.3	-1.9	17.8	-15.6
December 2	5.1	-2.0	15.8	-15.6
December 3	4.9	-2.1	21.2	-18.0
December 4	4.7	-2.3	19.1	-17.8
December 5	4.5	-2.5	19.6	-15.6
December 6	4.3	-2.7	19.6	-16.1
December 7	4.2	-2.8	16.1	-16.7
December 8	4.0	-2.8	18.9	-17.2
December 9	3.9	-2.9	16.7	-21.1
December 10	3.7	-3.1	18.3	-17.8
December 11	3.5	-3.3	17.8	-18.9
December 12	3.3	-3.4	14.4	-23.3
December 13	3.2	-3.6	16.1	-22.2
December 14	3.1	-3.8	16.7	-16.1
December 15	2.9	-3.9	14.0	-19.4
December 16	2.7	-4.1	17.8	-18.2
December 17	2.6	-4.2	12.5	-18.9
December 18	2.5	-4.4	12.2	-18.9
December 19	2.3	-4.6	14.4	-23.9
December 20	2.2	-4.7	14.4	-26.1
December 21	2.1	-4.8	16.1	-27.8
December 22	2.1	-4.8	15.0	-23.9
December 23	2.0	-4.9	13.3	-21.1
December 24	1.9	-5.0	16.6	-23.3
December 25	1.7	-5.2	16.9	-25.7
December 26	1.7	-5.3	11.7	-21.1
December 27	1.6	-5.4	15.7	-26.1
December 28	1.5	-5.5	18.6	-18.9
December 29	1.5	-5.6	15.0	-24.4
December 30	1.4	-5.7	13.9	-22.2
December 31	1.3	-5.9	15.6	-24.4

Weather Station Details

Years	Station	Coordinates
1997–2024	Hamilton RBG CS	location
1955–1997	Hamilton RBG	location
1866–1954	Hamilton	location