See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
28°
Clear
Feels Like: 26°
Min: 19°
Max: 28°
The next few hours will be overcast, with today reaching 28°C and dropping to 17°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
06:40
Sunrise
18:52
Sunset
Moon
Waxing Crescent
11:17
Moonrise
20:46
Moonset
Daily Forecast
Today
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Air Quality Data Available
Upgrade to access real-time air quality data for San Marino.
Resources
UV Index
Humidity
Weather in San Marino today, September 15, 2026
San Marino 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.
Temperatures climb from an overnight low near 19°C toward a daytime high of about 28°C. The air stays humid, with relative humidity between 44% and 85% and the peak around 23:00. Airflow remains manageable, reaching about 3.9 km/h around 17:00.
Through the afternoon cloud remains the main feature, with cover near 100% around 23:00. Bright spells should stay limited even as the day wears on. Horizontal visibility sits around 16.1 km, briefly nearer 15.9 km. The sun rises at 06:40 and sets at 18:52, for a total of 12 hours 12 minutes of sunlight today.
The practical takeaway for San Marino is a bright September 15, 2026, ideal for outdoor errands before temperatures ease from about 28°C.
Frequently asked questions about weather in San Marino
How warm does it get in San Marino?
The warmest month in San Marino is August, with average high temperatures of 31°C. The average temperature during this period is around 24°C.
How cold does it get in San Marino?
The coldest month in San Marino is January, with average low temperatures of 8°C. The average temperature during this period is around 13°C.
What is the wettest time of year in San Marino?
The wettest month in San Marino is January, with an average of 87mm of precipitation.
What is the driest time of year in San Marino?
The driest month in San Marino is July, with an average of 1mm of precipitation.
Explore more weather forecasts
- San Gabriel, California
- New York City, New York
- Alhambra, California
- Los Angeles, California
- South Pasadena, California
- Brooklyn, New York
- Pasadena, California
- Chicago, Illinois
- Temple City, California
- Houston, Texas
- Rosemead, California
- Queens, New York
- Sierra Madre, California
- Phoenix, Arizona
- Monterey Park, California
- Philadelphia, Pennsylvania
