Average weather in San Francisco in the course of May is 11. Average highs are typically 17 and low being 10 degrees. We have put some more details below:
| Month | Degrees Celsius |
|---|---|
| Temperature | 11 |
| High Temperature | 17 |
| Low Temperature | 10 |
| Sunshine Per Day | 9 |
Useful Links: San Francisco Weather: Average Weather & Yearly Climate