See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
18°
Overcast
Feels Like: 17°
Min: 17°
Max: 28°
The next few hours will be overcast, with today reaching 28°C and dropping to 16°C. The coming days will be clear starting in the afternoon.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:39
Sunrise
18:51
Sunset
Moon
Waxing Crescent
11:15
Moonrise
20:45
Moonset
Daily Forecast
Today
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Air Quality Data Available
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UV Index
Humidity
Weather in San Dimas today, September 15, 2026
Cloud cover dominates in San Dimas on September 15, 2026, keeping sunshine limited. Expect a grey, overcast feel rather than long bright spells. Cloud leads the morning, peaking close to 100% near 05:00. Sunshine has little room until later in the day.
The temperature range runs from about 17°C up to 28°C. Expect humidity between 44% and 88%, most humid near 23:00. Winds stay light, near 4.5 km/h by 16:00, so the day feels still more than breezy.
Through the afternoon cloud remains the main feature, with cover near 92% around 21:00. Bright spells should stay limited even as the day wears on. Horizontal visibility sits around 15.6 km, briefly nearer 14.2 km. Expect sunrise at 06:39, sunset at 18:51, and 12 hours 12 minutes of sunlight today overall.
Overall, San Dimas on September 15, 2026 stays grey and muted, so outdoor plans may want a flexible backup even with a high near 28°C.
Frequently asked questions about weather in San Dimas
How warm does it get in San Dimas?
The warmest month in San Dimas is August, with average high temperatures of 31°C. The average temperature during this period is around 25°C.
How cold does it get in San Dimas?
The coldest month in San Dimas is January, with average low temperatures of 7°C. The average temperature during this period is around 12°C.
What is the wettest time of year in San Dimas?
The wettest month in San Dimas is January, with an average of 94mm of precipitation.
What is the driest time of year in San Dimas?
The driest month in San Dimas is July, with an average of 1mm of precipitation.
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