St. John's Weather in September

St. John's in September sees moderate temperatures, with highs around 17°C (63°F) and overnight lows of 10°C (50°F). Rainfall is fairly high at around 103 mm (4.1 in) on average, so pack waterproofs just in case.

Rainfall in St. John's in September

Historically, approximately 14 days this month are expected to have rain, averaging 103 mm (4.1 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in St. John's in September

September in St. John's brings moderate temperatures, with highs of 17°C (63°F) and nights around 10°C (50°F). The month of September belongs to the summer season. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With overnight lows of 10°C (50°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in St. John's in September

With about 170 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.

Should you favor a climate that's both dry and comfortably warm, August typically offers the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.