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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Brockville, ON
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May
Average Temperature
High
20°
Feels 19
Low
8°
Feels 7
Average Precipitation
12 Days
Rain amount
57.6mm
Snow amount
0.1cm
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Daily Historical Averages
May 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
15°
22
17°
23
18°
24
14°
25
20°
26
23°
27
23°
28
23°
29
24°
30
24°
31
22°
Forecast
Thursday, May 21, 2026
Day
15°
Feels 14
Wind
19 km/h N
Gust
29 km/h
Humidity
36%
P.O.P
20%
Night
4°
Feels 3
Wind
11 km/h NE
Gust
17 km/h
Humidity
76%
P.O.P
10%
Historical Averages
May 21
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.