Fountain Valley Weather in September

September in Fountain Valley typically sees daytime highs of 27°C (81°F) and nighttime lows of 18°C (64°F). Minimal rainfall is typical for this month.

Rainfall in Fountain Valley in September

You can expect rain on roughly a single day based on historical data, averaging 4.2 mm (0.2 in) for the month. If rain does fall, it tends to be a moderate shower rather than anything heavy.

Temperature in Fountain Valley in September

September in Fountain Valley is generally perfect, with days reaching 27°C (81°F) and nights settling around 18°C (64°F). Overall, the month follows a fairly predictable daily temperature pattern. With overnight lows of 18°C (64°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep. On average, this month sees the highest temperatures of the year. Worth packing a few lighter outfits.

Sunshine in Fountain Valley in September

The days are predominantly sunny, with an estimated total of around 290 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

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

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• January
• February
• March
• April

• May
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• 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 Fountain Valley's climate page.

Fountain Valley Temperature in September

Min Temperature 18°C (64°F)  

Max Temperature 27°C (81°F)  

Chance of Rain 3%  

Precipitation 4.2 mm (0.2 in)  

Rainy days a single day  

Sunshine 290 hours *  

Percentage Sunshine *  

* Data from: Corona, the United States of America (41 KM, 25 Miles).

What to Wear in Fountain Valley 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 Fountain Valley 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 Fountain Valley's climate page.

More climate data for Fountain Valley

Temperature Rainfall Sunshine

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