Vacaville Weather in September

Vacaville in September sees very high daytime temperatures of 32°C (90°F) and nighttime lows of 14°C (57°F). With just 3.6 mm (0.1 in) of rainfall expected, it's a dry month overall.

Rainfall in Vacaville in September

You can typically expect a single day of rain this month, averaging around 3.6 mm (0.1 in). If rain does fall, it tends to be very light and barely worth getting out an umbrella for.

Temperature in Vacaville in September

September tends to be one of the perfect months in Vacaville, with 32°C (90°F) in the afternoon and 14°C (57°F) overnight. If you're spending a lot of time outdoors, it helps to plan around the warmer part of the day. Nights cool down to 14°C (57°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Vacaville in September

Expect a lot of sunshine this month, with about 347 hours of sun. These sunny conditions add to the overall experience.

For Vacaville itself, April, May and October generally stand 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 Vacaville's climate page.

Vacaville Temperature in September

Min Temperature 14°C (57°F)  

Max Temperature 32°C (90°F)  

Chance of Rain 3%  

Precipitation 3.6 mm (0.1 in)  

Rainy days a single day  

Humidity 57% *  

Sunshine 347 hours *  

Percentage Sunshine 93% *  

* Data from: Sacramento, the United States of America (49 KM, 30 Miles).

What to Wear in Vacaville in September

Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. With minimal rainfall expected, you can leave the rain gear at home. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Vacaville in September

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

Swimming

10/10

Cycling

8/10

Walking

8/10

Barbeque

10/10

Camping

10/10

Outdoor sports

8/10

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 Vacaville's climate page.

More climate data for Vacaville

Temperature Rainfall Sunshine Humidity

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