Best time to fly to San Francisco
The most popular months for travelers to fly to San Francisco are January, February, and March, when peak temperatures in San Francisco can reach up to 72.7°F in March. If you prefer quieter travel, consider September, the least busy time to visit with temperatures around 78.6°F and typically the lowest average one-way fare (around $210), roughly 13% cheaper than the yearly average. Looking for additional cheaper months to fly? August, July, and June offer average one-way fares roughly ranging from $212 to $227, making them good options for flexible travelers.
Month | Temperature | Precipitation | Cloudiness | Demand | Average one-way Fare |
| January | 70.7°F (21.5°C) | No Rain (Dry) | Sunny | High | $237 |
| February | 71.1°F (21.7°C) | No Rain (Dry) | Sunny | High | $265 |
| March | 72.7°F (22.6°C) | No Rain (Dry) | Sunny | High | $265 |
| April | 74.8°F (23.8°C) | No Rain (Dry) | Sunny | Average | $249 |
| May | 78.3°F (25.7°C) | No Rain (Dry) | Sunny | Average | $241 |
| June | 79.3°F (26.3°C) | Light Rain | Mostly Sunny | Average | $227 |
| July | 79.3°F (26.3°C) | Moderate Rain | Mostly Sunny | Average | $215 |
| August | 79.2°F (26.2°C) | Frequent Rain | Mostly Cloudy | Low | $212 |
| September | 78.6°F (25.9°C) | Frequent Rain | Mostly Cloudy | Low | $210 |
| October | 77.7°F (25.4°C) | Light Rain | Mostly Sunny | Low | $247 |
| November | 74.8°F (23.8°C) | No Rain (Dry) | Sunny | Average | $257 |
| December | 71.2°F (21.8°C) | No Rain (Dry) | Sunny | Average | $308 |
*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.