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London May Weather

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

Typical London May Weather 1991–2020
Average daily high	19.3 °C
Average daily low	7.6 °C
Average monthly precipitation	8.9 cm
Daily chance of precipitation	42.0%

London May Weather Records 1883–2024
Highest temperature	34.4 °C	May 31, 1919
Lowest temperature	-5.0 °C	May 7, 1968
Highest daily low	20.6 °C	May 27, 1914
Lowest daily high	2.2 °C	May 8, 1947
Hottest average high temperature	24.8 °C	1911
Coldest average high temperature	13.8 °C	1945
Most daily precipitation	13.0 cm	May 17, 1894
Most monthly precipitation	24.9 cm	1894

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	16.0	4.6	27.8	-4.6
May 2	16.2	4.8	29.4	-3.3
May 3	16.3	5.0	28.9	-4.4
May 4	16.4	5.1	29.4	-2.4
May 5	16.6	5.2	31.7	-2.8
May 6	16.8	5.4	31.1	-4.4
May 7	17.1	5.5	30.0	-5.0
May 8	17.3	5.8	30.6	-3.9
May 9	17.5	6.0	31.7	-4.4
May 10	17.8	6.2	30.6	-5.0
May 11	18.0	6.4	30.0	-3.3
May 12	18.2	6.7	28.7	-4.4
May 13	18.5	6.9	29.4	-3.4
May 14	18.8	7.2	30.0	-1.1
May 15	19.0	7.4	31.1	-3.3
May 16	19.3	7.6	31.1	-2.2
May 17	19.5	7.8	31.7	-2.2
May 18	19.7	8.0	31.1	-3.3
May 19	19.8	8.1	32.8	-2.8
May 20	19.9	8.3	32.2	-2.2
May 21	20.0	8.4	31.7	-3.9
May 22	20.2	8.6	33.9	-1.7
May 23	20.4	8.7	30.6	-1.7
May 24	20.5	8.9	29.6	-1.7
May 25	20.7	9.1	31.2	-1.1
May 26	20.9	9.3	31.7	-1.7
May 27	21.2	9.5	33.3	-2.8
May 28	21.5	9.8	33.9	0.0
May 29	21.6	10.0	33.1	-1.7
May 30	21.8	10.2	34.4	1.7
May 31	22.0	10.4	34.4	0.0

Weather Station Details

Years	Station	Coordinates
2002–2024	London CS	location
1941–2002	London International Airport	location
1932–1940	London Lambeth A	location
1883–1931	London South	location