San Mateo (CA) Temperature by Month

This graph shows the average minimum and maximum temperatures throughout the year in San Mateo (California), the United States of America. The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM. During this time the sun's heating effect is the strongest.

Temperature patterns do vary with the seasons. In winter, the time of minimum and maximum temperatures can shift slightly compared to summer.

• On average, the warmest month is September with 24°C.
• On average, the coolest month is December with 15°C.
• The average annual maximum temperature is 20°C.
• The average annual minimum temperature is 10°C.