Unlock deeper multi-jurisdiction research
Full sub-pages, saves, and alerts are available on paid plans.
Weather & Climate
Marathon, Ontario, Canada
Overview
Climate data and monthly weather averages for Marathon.
Key Metrics
Annual Avg
1.5°C
Summer Avg
14.6°C
Winter Avg
-13.5°C
Record High
30.5°C
Record Low
-42.8°C
Annual Precipitation
839.2 mm
Avg Humidity
87%
Summer Humidity
82%
Winter Humidity
95%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 1.9° | -15.4° | -42.8° | 45.3 | 95% | 31 | 33.4 |
| Feb | 0.9° | -14.2° | -38.4° | 34.4 | 95% | 53 | 31.6 |
| Mar | 17.9° | -7.5° | -34.8° | 54.9 | 95% | 103 | 34.9 |
| Apr | 20.5° | 0.7° | -24.1° | 57.3 | 81% | 145 | 33.2 |
| May | 25.6° | 7.8° | -6.1° | 74.4 | 78% | 170 | 30.6 |
| Jun | 27.4° | 12.9° | -1° | 91.8 | 80% | 180 | 22.9 |
| Jul | 28.9° | 15.4° | 4° | 85.6 | 83% | 182 | 24.8 |
| Aug | 30.5° | 15.6° | 4.3° | 76.9 | 83% | 157 | 25 |
| Sep | 26.6° | 11.8° | -2.3° | 100.5 | 84% | 107 | 27.1 |
| Oct | 22.6° | 4.4° | -12.6° | 89.9 | 86% | 65 | 29.7 |
| Nov | 13.8° | -2.6° | -33.4° | 70.5 | 90% | 32 | 29.4 |
| Dec | 6.6° | -11° | -39.3° | 57.7 | 95% | 24 | 34.2 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
Subscribe to unlock the full sub-page depth for additional jurisdictions.
You can keep discovering Oyster publicly, but full multi-jurisdiction depth, tracking, alerts, and exports are part of paid access.