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Oshawa May Weather

Averages and records for weather in Oshawa, Ontario in the month of May.

Typical Oshawa May Weather 1991–2020
Average daily high	17.5 °C
Average daily low	7.5 °C
Average monthly precipitation	7.6 cm
Average monthly snow	none
Daily chance of precipitation	38.8%
Daily chance of snow	0%

Oshawa May Weather Records 1882–2024
Highest temperature	35.0 °C	May 27, 1923
Lowest temperature	-4.4 °C	May 3, 1885
Highest daily low	19.4 °C	May 25, 1923
Lowest daily high	2.8 °C	May 16, 1956
Hottest average high temperature	22.3 °C	1887
Coldest average high temperature	13.4 °C	1997
Most daily precipitation	5.7 cm	May 25, 1955
Most monthly precipitation	16.0 cm	2017
Most daily snow	1.8 cm	May 11, 1885
Most monthly snow	1.8 cm	1885

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

Day	Average (°C)		Record (°C)
Day	High	Low	High	Low
May 1	14.4	4.7	22.3	-2.2
May 2	14.5	4.8	23.3	-2.8
May 3	14.7	5.0	26.0	-4.4
May 4	14.9	5.1	27.0	-1.0
May 5	15.1	5.3	23.3	-2.2
May 6	15.3	5.4	25.6	-0.2
May 7	15.5	5.6	26.7	-1.1
May 8	15.7	5.8	26.3	-2.8
May 9	16.0	6.0	28.3	-3.7
May 10	16.2	6.2	27.8	-1.7
May 11	16.5	6.4	28.3	-0.7
May 12	16.7	6.6	28.5	-3.8
May 13	16.9	6.9	26.7	-3.3
May 14	17.1	7.1	26.2	-1.9
May 15	17.4	7.3	26.6	-1.1
May 16	17.6	7.5	24.3	-1.1
May 17	17.8	7.6	27.8	-2.2
May 18	18.0	7.8	27.2	-1.1
May 19	18.2	8.0	27.8	-0.6
May 20	18.3	8.2	28.9	-1.1
May 21	18.4	8.3	30.4	-1.7
May 22	18.5	8.5	27.2	-1.1
May 23	18.7	8.7	30.0	-2.0
May 24	18.8	8.8	27.2	0.0
May 25	19.0	9.0	28.8	-0.6
May 26	19.2	9.2	31.0	2.2
May 27	19.4	9.4	35.0	0.6
May 28	19.7	9.6	30.7	1.7
May 29	19.9	9.8	31.0	-2.2
May 30	20.0	10.0	32.0	-1.7
May 31	20.2	10.2	30.5	2.8

Weather Station Details

Years	Station	Coordinates
2010–2024	Oshawa	location
1970–2009	Oshawa WPCP	location
1882–1969	Oshawa	location