Saint John Weather in September

During September, Saint John experiences pleasant daytime temperatures of 18°C (64°F) and cooler nights around 12°C (54°F). As part of the summer season, expect quite a bit of rainfall. Around 115 mm (4.5 in) is typical.

Rainfall in Saint John in September

You can expect rain on roughly 11 days based on historical data, averaging 115 mm (4.5 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Saint John in September

In September, Saint John sees pleasant temperatures, with highs of 18°C (64°F). Nights drop to around 12°C (54°F). The summer season takes place during September. Conditions are often most pleasant around the middle of the day. With lows of 12°C (54°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

If you prefer enjoying temperate temperatures and rain-free days, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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• January
• February
• March
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• May
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• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Canada, check out our Saint John's climate page.

Saint John Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 18°C (64°F)  

Chance of Rain 37%  

Precipitation 115 mm (4.5 in)  

Rainy days 11 days  

What to Wear in Saint John in September

For Saint John in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho.

What To Do in Saint John in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

9/10

Walking

9/10

Camping

6/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Canada, check out our Saint John's climate page.

More climate data for Saint John

Temperature Rainfall

See the full Saint John climate overview or explore weather in Canada.