Saint Peters Weather in September

September in Saint Peters typically sees daytime highs of 19°C (66°F) and nighttime lows of 14°C (57°F). Rainfall is also possible this month, so it's worth packing an umbrella. It falls within the summer season.

Rainfall in Saint Peters in September

You can expect rain on around 12 days based on historical patterns, with 114 mm (4.5 in) average for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Saint Peters in September

In September, Saint Peters sees pleasant temperatures, with highs of 19°C (66°F). Nights drop to around 14°C (57°F). During September, you'll experience the summer season. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With lows of 14°C (57°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.

Sunshine in Saint Peters in September

The area experiences a moderate amount of sunshine, with approximately 183 hours of sunlight expected. This means a decent mix of sun and overcast.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. July and August typically offer the best weather for Saint Peters.