Allegan Weather in September

Allegan in September sees high daytime temperatures of 24°C (75°F) and nighttime lows of 11°C (52°F). Rainfall is fairly high this month at around 88 mm (3.5 in), so pack a rain jacket to stay dry.

Rainfall in Allegan in September

Historically, approximately 10 days this month are expected to have rain, averaging 88 mm (3.5 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Allegan in September

Allegan in September has excellent weather. Days reach 24°C (75°F) and nights cool to 11°C (52°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights drop to around 11°C (52°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 Allegan in September

The month enjoys around 209 hours of sunshine, creating mostly sunny days with good weather conditions.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

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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 Allegan's climate page.

Allegan Temperature in September

Min Temperature 11°C (52°F)  

Max Temperature 24°C (75°F)  

Chance of Rain 34%  

Precipitation 88 mm (3.5 in)  

Rainy days 10 days  

Humidity 76% *  

Sunshine 209 hours *  

Percentage Sunshine 55% *  

* Data from: Grand Rapids, the United States of America (50 KM, 31 Miles).

What to Wear in Allegan in September

For Allegan 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. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Allegan in September

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

Swimming

9/10

Cycling

9/10

Walking

9/10

Barbeque

8/10

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 Allegan's climate page.

More climate data for Allegan

Temperature Rainfall Sunshine Humidity

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