Mount Vernon Weather in September

With daytime temperatures of 26°C (79°F) and nighttime lows of 14°C (57°F), September in Mount Vernon brings high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 86 mm (3.4 in) falls on average.

Rainfall in Mount Vernon in September

You can expect rain on around 9 days based on historical patterns, with 86 mm (3.4 in) average for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Mount Vernon in September

September is one of the better months to visit Mount Vernon. Expect 26°C (79°F) during the day and 14°C (57°F) at night. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. 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.

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

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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 Mount Vernon's climate page.

Mount Vernon Temperature in September

Min Temperature 14°C (57°F)  

Max Temperature 26°C (79°F)  

Chance of Rain 30%  

Precipitation 86 mm (3.4 in)  

Rainy days 9 days  

What to Wear in Mount Vernon in September

Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho.

What To Do in Mount Vernon in September

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

Cycling

7/10

Walking

7/10

Camping

8/10

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 Mount Vernon's climate page.

More climate data for Mount Vernon

Temperature Rainfall

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