Saint John weather by month & the best time to visit
🇨🇦 Canada · seaside town · continental climate
The best time to visit Saint John is August — its sunniest month (Sunshine Score 74/100), with July close behind. Saint John averages about 1,943 hours of sunshine a year. Daytime highs around 22°C / 72°F and roughly 85 mm of rain in August.
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- Sun hours / year
- 1,943
- Sunniest month
- August
- Peak score
- 74/100
- Rain / year
- 1,243 mm
- Snow / year
- ≈3.6 m
- Midday UV at peak
- 6 (high)
- Sea at warmest
- 19°C / 66°F
- Population
- 72k
- Elevation
- 104 m
When is the best time to visit Saint John?
For sunshine, the best time to visit Saint John is August, then July. The dullest month is January (0/100, 94 mm of rain). The full month-by-month picture is in the table below.
How sunny is Saint John?
Saint John gets a moderate 1,943 hours of sunshine a year. 74 Sunshine Score points separate August (74) from January (0), so the month you pick matters. It ranks #154 of 242 destinations in Canada for annual sunshine, below the national median of 2,024 hours. The year's 1,243 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 0 | -3° / 27°F | -12° / 10°F | 94 mm | 1 | 3° / 37°F |
| February | 0 | -2° / 28°F | -11° / 12°F | 93 mm | 1 | 2° / 36°F |
| March | 0 | 2° / 36°F | -6° / 21°F | 91 mm | 3 | 3° / 37°F |
| April | 0 | 8° / 46°F | -1° / 30°F | 95 mm | 4 | 6° / 43°F |
| May | 36 | 14° / 57°F | 5° / 41°F | 98 mm | 5 | 11° / 52°F |
| June | 58 | 18° / 64°F | 10° / 50°F | 110 mm | 6 | 15° / 59°F |
| July | 73 | 22° / 72°F | 13° / 55°F | 91 mm | 6 | 18° / 64°F |
| August | 74 | 22° / 72°F | 13° / 55°F | 85 mm | 6 | 19° / 66°F |
| September | 59 | 18° / 64°F | 10° / 50°F | 102 mm | 4 | 17° / 63°F |
| October | 22 | 12° / 54°F | 5° / 41°F | 124 mm | 2 | 13° / 55°F |
| November | 0 | 6° / 43°F | -1° / 30°F | 127 mm | 1 | 9° / 48°F |
| December | 0 | 0° / 32°F | -7° / 19°F | 133 mm | 1 | 4° / 39°F |
Sea temperature in Saint John by month
The sea off Saint John is warmest in August at around 19°C / 66°F, and coolest in February at 2°C / 36°F. It never reaches comfortable swimming temperatures (21°C+). Month-by-month sea-surface temperatures are in the Sea column of the table above.
See Saint John on the interactive sunshine globe →
Nearby places for sunshine
- Fredericton Canada · 79 km · best in Aug · 2,001 h sun/yr
- Moncton Canada · 129 km · best in Jul · 1,904 h sun/yr
- Halifax Canada · 193 km · best in Jul · 1,928 h sun/yr
- Bangor United States · 237 km · best in Jul · 2,079 h sun/yr
- Charlottetown Canada · 240 km · best in Jul · 1,705 h sun/yr
- Portland (Maine) United States · 397 km · best in Jul · 2,150 h sun/yr
Nearest destinations
- Bar Harbor United States · 217 km · 2,079 h sun/yr · best in Jul
- Presque Isle United States · 226 km · 1,961 h sun/yr · best in Sep
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