See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:32
Sunrise
18:31
Sunset
Moon
Waxing Gibbous
12:40
Moonrise
02:59
Moonset
Daily Forecast
Today
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Air Quality Data Available
Upgrade to access real-time air quality data for San Carlos.
Resources
UV Index
Humidity
Current stargazing conditions?
See sky darkness, moon phase, and the best viewing window for San Carlos.
View stargazing scoreWeather in San Carlos today, September 20, 2026
Rain features in San Carlos on September 20, 2026, so keep waterproofs handy through the day. The damp theme is strongest where shower chances rise.
Temperatures climb from an overnight low near 15°C toward a daytime high of about 23°C. Moisture in the air spans 70%-97%, with the highest values around 21:00. A lighter breeze peaks around 23:00 near 3.9 km/h.
Expect the wet theme to continue later, as rain odds reach 90% near 22:00. Cloud amounts hold near 100% around 21:00. Visibility stays generally good near 14.4 km on average, though it can drop toward 4.8 km in thicker cloud or showers. Daylight runs from 06:32 to 18:31, lasting 11 hours 58 minutes of sunlight today.
Taken together, San Carlos looks wet enough on September 20, 2026 that flexible outdoor plans work best, with temperatures peaking near 23°C.
Frequently asked questions about weather in San Carlos
How warm does it get in San Carlos?
The warmest month in San Carlos is January, with average high temperatures of 27°C. The average temperature during this period is around 23°C.
How cold does it get in San Carlos?
The coldest month in San Carlos is July, with average low temperatures of 8°C. The average temperature during this period is around 11°C.
What is the wettest time of year in San Carlos?
The wettest month in San Carlos is April, with an average of 103mm of precipitation.
What is the driest time of year in San Carlos?
The driest month in San Carlos is November, with an average of 65mm of precipitation.