Vallejo Weather in September

September in Vallejo sees daytime temperatures around 27°C (81°F) and lows of 12°C (54°F) at night. The excellent weather makes it a good time to visit.

Rainfall in Vallejo in September

Climate statistics over the past 30 years suggest around a single day of rain, with 3.3 mm (0.1 in) average for the month. Any rain that does arrive is likely to be light drizzle rather than a proper shower.

Temperature in Vallejo in September

September is a good time to be in Vallejo. Days are excellent, reaching 27°C (81°F), with nights around 12°C (54°F). September is part of summer. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights drop to around 12°C (54°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. It's the warmest month of the year on average, so summer clothing is the way to go.

Sunshine in Vallejo in September

Enjoy a sunny month with about 270 hours of sunshine, the clear skies make Vallejo even more beautiful.

If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit Vallejo.

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Check the conditions for any month of the year.

• January
• February
• March
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• May
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• 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 Vallejo's climate page.

Vallejo Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 27°C (81°F)  

Chance of Rain 3%  

Precipitation 3.3 mm (0.1 in)  

Rainy days a single day  

Humidity 73% *  

Sunshine 270 hours *  

Percentage Sunshine 73% *  

* Data from: San Francisco, the United States of America (55 KM, 34 Miles).

What to Wear in Vallejo 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). Almost no rain is expected, so no need to bring rain gear. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Vallejo 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 Vallejo's climate page.

More climate data for Vallejo

Temperature Rainfall Sunshine Humidity

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