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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Marathon, ON
Exceptional El Niño dominates this fall
Content continues below
September
Average Temperature
High
16°
Feels 16
Low
9°
Feels 7
Average Precipitation
10 Days
Rain amount
68mm
Snow amount
0.1cm
Content continues below
Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
15°
17
17°
18
14°
19
16°
20
16°
21
16°
22
17°
23
17°
24
17°
25
17°
26
17°
27
16°
28
15°
29
15°
30
15°
Forecast
Wednesday, September 16, 2026
Day
15°
Feels 15
Wind
12 km/h SW
Gust
20 km/h
Humidity
59%
P.O.P
20%
Night
11°
Feels 9
Wind
16 km/h SW
Gust
24 km/h
Humidity
88%
P.O.P
30%
Historical Averages
Sep 16
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.