See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
18°
Mostly Clear
Feels Like: 22°
Min: 17°
Max: 31°
The next few hours will be clear, with today reaching 31°C and dropping to 16°C. The coming days will be mostly clear until afternoon, returning in the evening.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:37
Sunrise
18:49
Sunset
Moon
Waxing Crescent
11:13
Moonrise
20:43
Moonset
Daily Forecast
Today
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
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Weather in San Bernardino today, September 15, 2026
San Bernardino is set for a fine, sunny day on September 15, 2026, with only limited interruptions to the clear sky. The early hours look particularly favourable for being outside. Cloud leads the morning, peaking close to 99% near 08:00. Sunshine has little room until later in the day.
Temperatures climb from an overnight low near 17°C toward a daytime high of about 31°C. Relative humidity sits between 35% and 92%, reaching its peak around 06:00. Airflow remains manageable, reaching about 5.3 km/h around 17:00.
Afternoon skies stay clogged, peaking close to 100% near 21:00. The grey theme continues rather than clearing out. Visibility holds near 15.7 km, though it can fall to 13.8 km. Daylight runs from 06:37 to 18:49, lasting 12 hours 12 minutes of sunlight today.
Overall, San Bernardino on September 15, 2026 favours outdoor plans under mostly open skies, with a comfortable high near 31°C.
Frequently asked questions about weather in San Bernardino
How warm does it get in San Bernardino?
The warmest month in San Bernardino is August, with average high temperatures of 33°C. The average temperature during this period is around 26°C.
How cold does it get in San Bernardino?
The coldest month in San Bernardino is January, with average low temperatures of 5°C. The average temperature during this period is around 10°C.
What is the wettest time of year in San Bernardino?
The wettest month in San Bernardino is January, with an average of 82mm of precipitation.
What is the driest time of year in San Bernardino?
The driest month in San Bernardino is June, with an average of 3mm of precipitation.
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