Unlock deeper multi-jurisdiction research
Full sub-pages, saves, and alerts are available on paid plans.
Weather & Climate
Harriston, Ontario, Canada
Overview
Climate data and monthly weather averages for Harriston.
Key Metrics
Annual Avg
6.6°C
Summer Avg
19.1°C
Winter Avg
-6.1°C
Record High
34.8°C
Record Low
-27.6°C
Annual Precipitation
837.8 mm
Avg Humidity
82%
Summer Humidity
72%
Winter Humidity
92%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 12.2° | -7.3° | -25° | 61.1 | 93% | 46 | 64 |
| Feb | 15° | -7.2° | -27.6° | 55.7 | 92% | 65 | 70 |
| Mar | 24.5° | -2.2° | -26.1° | 55.8 | 86% | 109 | 69.1 |
| Apr | 24.4° | 4.4° | -17.8° | 71.7 | 80% | 137 | 59.7 |
| May | 31° | 11.3° | -4.3° | 75 | 78% | 171 | 58.5 |
| Jun | 34° | 17° | 1.1° | 79.2 | 75% | 186 | 50.8 |
| Jul | 34.8° | 20.5° | 6.6° | 72.5 | 70% | 190 | 44.2 |
| Aug | 34.7° | 19.9° | 7.5° | 70.4 | 71% | 166 | 47.4 |
| Sep | 34.2° | 16° | 1.6° | 73.8 | 73% | 126 | 50.5 |
| Oct | 28.6° | 8.5° | -4.6° | 83.7 | 81% | 78 | 51.3 |
| Nov | 21.6° | 2° | -15.5° | 72.9 | 87% | 48 | 64.9 |
| Dec | 15.4° | -3.8° | -23.1° | 66 | 92% | 33 | 65.1 |
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.