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 excellent, 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.