Downey Weather in September

September in Downey typically sees daytime highs of 30°C (86°F) and nighttime lows of 18°C (64°F). Minimal rainfall is typical for this month.

Rainfall in Downey in September

Records from the past 30 years suggest around 0 days of rain, with 2.7 mm (0.1 in) average for the month. On the rare occasion it does rain, the shower can be quite heavy given the low total spread across a single day.

Temperature in Downey in September

Downey in September is worth a visit. The temperature is perfect, with 30°C (86°F) during the day and 18°C (64°F) at night. This kind of day-to-night contrast is typical for this time of year. 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.

Sunshine in Downey in September

The city usually sees around 278 hours of sunlight, indicating many sunny days — a great month for sightseeing.

Wind Speed in Downey in September

Average wind speeds reach 3 m/s (6 knots) in September, creating light breezes that feel pleasant throughout the day. Some days are calmer, while others bring slightly more active breezes.

Average water temperature in September

The water temperature is 18°C (64°F). It's not warm, but most people find it perfectly fine for a swim once they're in.

September in Downey can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.

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• January
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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 Downey's climate page.

Downey Temperature in September

Min Temperature 18°C (64°F)  

Max Temperature 30°C (86°F)  

Water Temperature 18°C (64°F) *  

Chance of Rain 0%  

Precipitation 2.7 mm (0.1 in)  

Rainy days 0 days  

Humidity 67% *  

Windspeed 3 m/s (6 knots) *  

Sunshine 278 hours *  

Percentage Sunshine 75% *  

* Data from: Los Angeles, the United States of America (24 KM, 15 Miles).

What to Wear in Downey 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. Expect water temperatures of around 18°C (64°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Downey 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 Downey's climate page.

More climate data for Downey

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

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