Mount Vernon Weather in September

September in Mount Vernon averages 24°C (75°F) during the day and 11°C (52°F) at night. Quite a bit of rainfall is typical this month, with around 90 mm (3.5 in) on average. An umbrella is a good idea.

Rainfall in Mount Vernon in September

Typically, about 11 days will experience rainfall, with an average of 90 mm (3.5 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Mount Vernon in September

The excellent temperature in Mount Vernon in September makes it a solid month to visit, with 24°C (75°F) during the day and 11°C (52°F) at night. This kind of day-to-night contrast is typical for this time of year. 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 Mount Vernon in September

The city usually sees around 212 hours of sunlight, indicating many sunny days — a great month for sightseeing.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.

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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 Mount Vernon's climate page.

Mount Vernon Temperature in September

Min Temperature 11°C (52°F)  

Max Temperature 24°C (75°F)  

Chance of Rain 37%  

Precipitation 90 mm (3.5 in)  

Rainy days 11 days  

Humidity 69% *  

Sunshine 212 hours *  

Percentage Sunshine 57% *  

* Data from: Columbus, the United States of America (64 KM, 40 Miles).

What to Wear in Mount Vernon in September

For Mount Vernon 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 Mount Vernon 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 Mount Vernon's climate page.

More climate data for Mount Vernon

Temperature Rainfall Sunshine Humidity

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