Weather & Climate
Saint John, New Brunswick, Canada
Overview
Available climate summaries for Saint John. Origins and reference periods are unverified; stored values may include AI estimates. Treat these as estimates until independently verified.
Key Metrics
Annual Avg
5.8°C
Summer Avg
17°C
Winter Avg
-6.3°C
Record High
30.6°C
Record Low
-30.4°C
Annual Precipitation
1235.6 mm
Avg Humidity
86%
Summer Humidity
84%
Winter Humidity
92%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 14° | -8.1° | -30.4° | 88 | 93% | 48 | 39.2 |
| Feb | 13.2° | -7° | -28.8° | 86.8 | 93% | 66 | 35.9 |
| Mar | 21.7° | -2.2° | -25.6° | 90.8 | 85% | 109 | 35.6 |
| Apr | 21° | 4.1° | -11.4° | 94.8 | 82% | 133 | 35.6 |
| May | 27.2° | 9.9° | -2.4° | 100.4 | 82% | 158 | 26.4 |
| Jun | 30.4° | 14.8° | 0.9° | 109.2 | 83% | 165 | 22.4 |
| Jul | 30.6° | 18.3° | 8.7° | 94.9 | 85% | 173 | 32.7 |
| Aug | 30.4° | 18° | 6.8° | 87.1 | 85% | 154 | 30.7 |
| Sep | 30.6° | 14.3° | 1.2° | 97.8 | 85% | 120 | 29.4 |
| Oct | 23.9° | 8.4° | -5° | 127.4 | 86% | 78 | 33.1 |
| Nov | 17.1° | 2.3° | -15.3° | 126.6 | 87% | 46 | 32.5 |
| Dec | 14.7° | -3.8° | -27.6° | 131.8 | 90% | 36 | 32 |
Data sources
Estimates and unverified origins
Oyster List climate data - Climate origins are unverified. Available methods include historical APIs and AI estimates; stored rows do not identify the original dataset, reference period, or model for each value. Treat these summaries as estimates until independently verified. Record updated 2026-03-22.