Waterloo Weather in September

During September, Waterloo experiences high daytime temperatures of 24°C (75°F) and cooler nights around 11°C (52°F). Expect quite a bit of rainfall. Around 81 mm (3.2 in) is typical.

Rainfall in Waterloo in September

Based on our climate data of the past 30 years, about 9 days of rain are anticipated, with 81 mm (3.2 in) on average. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Waterloo in September

Weather in Waterloo is at its excellent in September. Highs reach 24°C (75°F), while nights settle around 11°C (52°F). This kind of day-to-night contrast is typical for this time of year. With lows of 11°C (52°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're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Waterloo.

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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 Waterloo's climate page.

Waterloo Temperature in September

Min Temperature 11°C (52°F)  

Max Temperature 24°C (75°F)  

Chance of Rain 30%  

Precipitation 81 mm (3.2 in)  

Rainy days 9 days  

What to Wear in Waterloo in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes.

What To Do in Waterloo in September

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

Cycling

9/10

Walking

9/10

Camping

8/10

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

More climate data for Waterloo

Temperature Rainfall

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