Saint Peters Weather in September

Saint Peters in September sees high temperatures, with highs around 27°C (81°F) and overnight lows of 14°C (57°F). Rainfall is fairly high at around 103 mm (4.1 in) on average, so pack waterproofs just in case.

Rainfall in Saint Peters in September

The climate data from previous years indicates about 8 days of rain, averaging 103 mm (4.1 in) for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Saint Peters in September

September in Saint Peters brings typical temperatures with highs around 27°C (81°F) and lows of 14°C (57°F). This kind of day-to-night contrast is typical for this time of year. Nights drop to around 14°C (57°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Saint Peters in September

With approximately 235 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

For Saint Peters itself, October generally stands out with 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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For a detailed overview over the year and the best time to visit the United States of America, check out our Saint Peters's climate page.

Saint Peters Temperature in September

Min Temperature 14°C (57°F)  

Max Temperature 27°C (81°F)  

Chance of Rain 27%  

Precipitation 103 mm (4.1 in)  

Rainy days 8 days  

Humidity 71% *  

Sunshine 235 hours *  

Percentage Sunshine 63% *  

* Data from: St. Louis, the United States of America (41 KM, 26 Miles).

What to Wear in Saint Peters in September

Warm but pleasant conditions in Saint Peters in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Saint Peters in September

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

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

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 the United States of America, check out our Saint Peters's climate page.

More climate data for Saint Peters

Temperature Rainfall Sunshine Humidity

See the full Saint Peters climate overview or explore weather in the United States of America.