Photo credits Craig Howell from San Carlos, CA, USA · Zeppelin-ride-020100925-195 (5029394846).jpg · CC BY 2.0 · Cropped and resized
San Francisco
Explore travel timing in San Francisco using records from 2010–2025. These compare the same weeks across years, not a forecast for your trip.
Based on 16 years (2010-2025) of historical climate stats, not a forecast.
The year's climate rhythm
Based on all 16 years (2010–2025). Select a week to explore its records.
View weekly occurrence counts and details
For each week, this counts years with at least one day meeting a threshold, out of 16 years. Do not sum weekly counts into an annual event count.
| Week | Years meeting a threshold |
|---|---|
| 1/1 – 1/7 | 4 of 16 years |
| 1/8 – 1/14 | 4 of 16 years |
| 1/15 – 1/21 | 6 of 16 years |
| 1/22 – 1/28 | 2 of 16 years |
| 1/29 – 2/4 | 5 of 16 years |
| 2/5 – 2/11 | 5 of 16 years |
| 2/12 – 2/18 | 5 of 16 years |
| 2/19 – 2/25 | 5 of 16 years |
| 2/26 – 3/4 | 8 of 16 years |
| 3/5 – 3/11 | 3 of 16 years |
| 3/12 – 3/18 | 3 of 16 years |
| 3/19 – 3/25 | 2 of 16 years |
| 3/26 – 4/1 | 3 of 16 years |
| 4/2 – 4/8 | 3 of 16 years |
| 4/9 – 4/15 | 3 of 16 years |
| 4/16 – 4/22 | 2 of 16 years |
| 4/23 – 4/29 | 0 of 16 years |
| 4/30 – 5/6 | 0 of 16 years |
| 5/7 – 5/13 | 2 of 16 years |
| 5/14 – 5/20 | 2 of 16 years |
| 5/21 – 5/27 | 0 of 16 years |
| 5/28 – 6/3 | 1 of 16 years |
| 6/4 – 6/10 | 4 of 16 years |
| 6/11 – 6/17 | 1 of 16 years |
| 6/18 – 6/24 | 1 of 16 years |
| 6/25 – 7/1 | 1 of 16 years |
| 7/2 – 7/8 | 0 of 16 years |
| 7/9 – 7/15 | 0 of 16 years |
| 7/16 – 7/22 | 0 of 16 years |
| 7/23 – 7/29 | 0 of 16 years |
| 7/30 – 8/5 | 0 of 16 years |
| 8/6 – 8/12 | 0 of 16 years |
| 8/13 – 8/19 | 0 of 16 years |
| 8/20 – 8/26 | 1 of 16 years |
| 8/27 – 9/2 | 1 of 16 years |
| 9/3 – 9/9 | 1 of 16 years |
| 9/10 – 9/16 | 0 of 16 years |
| 9/17 – 9/23 | 1 of 16 years |
| 9/24 – 9/30 | 2 of 16 years |
| 10/1 – 10/7 | 2 of 16 years |
| 10/8 – 10/14 | 0 of 16 years |
| 10/15 – 10/21 | 2 of 16 years |
| 10/22 – 10/28 | 1 of 16 years |
| 10/29 – 11/4 | 0 of 16 years |
| 11/5 – 11/11 | 2 of 16 years |
| 11/12 – 11/18 | 2 of 16 years |
| 11/19 – 11/25 | 1 of 16 years |
| 11/26 – 12/2 | 4 of 16 years |
| 12/3 – 12/9 | 1 of 16 years |
| 12/10 – 12/16 | 5 of 16 years |
| 12/17 – 12/23 | 3 of 16 years |
| 12/24 – 12/30 | 2 of 16 years |
How to read this number
Based on 16 years (2010-2025) of historical climate stats, not a forecast.
See method, data source, and limitations
An occurrence = at least one of: max temp >= 33°C (heat), daily precip >= 30mm (rain), gust >= 70km/h (wind), min temp <= -10°C (cold) on a given day. One day is enough to count that week/year.
Built from ERA5 reanalysis retrieved through the Open-Meteo Archive API. Covers 100 cities over 2010–2025; gridded data combines observations and models.
This index is historical statistics, not a weather forecast. Wind gust is an imperfect proxy for typhoons, and grid resolution may miss microclimates.