Brentwood weather
At 4:00 PM local time it was cloudy and 21°C (70°F). Real rain for 7 hours (23.8 mm total) — consider moving outdoor plans. Best months for weather: May–Oct. Below: today's sky, the hour-by-hour rain chance and the 16-day forecast for Brentwood, California, United States.
Current conditions
- Clouds
- 100%
- Chance of rain
- 8%
- Rain
- 0.0 mm/h
Hourly Forecast
Real rain for 7 hours (23.8 mm total) — consider moving outdoor plans
Daily Forecast
Best Time to Visit
Peak season May–OctOff season Dec–Feb
About Brentwood weather
Is it raining in Brentwood right now?
No. It’s cloudy and 21° right now. Real rain for 7 hours (23.8 mm total) — consider moving outdoor plans.
What’s the weather like in Brentwood this week?
Over the next 7 days, expect highs of 19–27° and lows of 11–19°. Rain is likely on 2 of 7 days (Saturday, Sunday). The driest day looks like Monday.
Has it been raining in Brentwood lately?
Barely. The past 7 days were mostly dry, with 0.0 mm of rain in total.
What should I pack for Brentwood?
For the coming week, bring an umbrella or rain jacket and a warm layer for the evenings.
Brentwood weather by month
When is the best time to visit Brentwood?
Based on weather alone, the best time to visit Brentwood is May–Oct, according to NASA's 2001–2025 climate averages. Dec–Feb tends to be the least pleasant. Average highs run from 17°C (63°F) in December to 26°C (79°F) in September.
What is the rainiest month in Brentwood?
January is the wettest month, with about 96 mm (3.8 in) of rain on average. August is the driest, with about 0 mm (0.0 in).
What is the hottest month in Brentwood?
September is the warmest, with average highs of 26°C (79°F) and lows of 18°C (64°F). December is the coolest, with highs of 17°C (63°F) and lows of 10°C (49°F).
Does Brentwood have a rainy season?
Not a strong one. No month averages more than 150 mm of rain; the wettest is January at about 96 mm (3.8 in).
How warm is the sea in Brentwood?
The sea is warmest in September at about 22°C (71°F) and coolest in January at about 15°C (58°F). It stays cool all year.
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine, forecast and current conditions from Open-Meteo. Page updated . How we rate months