Weather in San Francisco, California for May 2026
Until now, May 2026 in San Francisco has been nearly identical to the historical average, with a temperature of 17.6 °F (showing only a slight deviation of 0.1 °F).
The forecast for the upcoming days in San Francisco predicts a temperature of 17.4 °F, which is slightly above the historical average.
In general, the average temperature in San Francisco at the beginning of May is 16.6 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 16 °F by the end of May.
With an average of 4 rainy days, San Francisco experiences minimal rainfall in May.
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San Francisco Weather May
Temperatures trend during May in San Francisco
May weather in San Francisco day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Sunny | 16° /9° | 0.3 mm | 5 | |
| May 2 | Sunny | 16° /9° | 1.2 mm | 4 | |
| May 3 | Sunny | 18° /10° | 1.7 mm | 6 | |
| May 4 | Sunny | 17° /10° | 3.6 mm | 5 | |
| May 5 | Sunny | 17° /9° | 1.3 mm | 4 | |
| May 6 | Sunny | 16° /10° | 0.4 mm | 5 | |
| May 7 |  Partly cloudy | 16° /9° | 0 mm | 6 | |
| May 8 | Sunny | 17° /9° | 0.2 mm | 5 | |
| May 9 | Sunny | 17° /10° | 0.2 mm | 5 | |
| May 10 | Sunny | 18° /9° | 0 mm | 6 | |
| May 11 | Sunny | 18° /9° | 0 mm | 6 | |
| May 12 | Sunny | 17° /10° | 1.3 mm | 6 | |
| May 13 | Sunny | 18° /10° | 0 mm | 6 | |
| May 14 | Sunny | 18° /10° | 0 mm | 6 | |
| May 15 |  Overcast | 18° /10° | 0 mm | 5 | |
| May 16 |  Cloudy | 18° /10° | 0 mm | 5 | |
| May 17 | Overcast | 18° /10° | 0 mm | 5 | |
| May 18 | Sunny | 20° /10° | 0 mm | 6 | |
| May 19 | Sunny | 19° /11° | 0 mm | 6 | |
| May 20 | Sunny | 18° /10° | 0 mm | 6 | |
| May 21 | Sunny | 18° /10° | 0 mm | 6 | |
| May 22 | Cloudy | 18° /9° | 0 mm | 8.5 | |
| May 23 |  Patchy rain possible | 17° /12° | 0.1 mm | 8.6 | |
| May 24 | Sunny | 16° /12° | 0 mm | 8.4 | |
| May 25 | Partly cloudy | 15° /11° | 0 mm | 8 | |
| May 26 | Patchy rain possible | 15° /10° | 0.3 mm | 0 | |
| May 27 | Sunny | 16° /10° | 0 mm | 4 | |
| May 28 | Sunny | 17° /11° | 0 mm | 4 | |
| May 29 | Patchy rain possible | 15° /11° | 0.1 mm | 3 | |
| May 30 | Sunny | 17° /11° | 0 mm | 4 | |
| May 31 | Sunny | 17° /10° | 0 mm | 4 | |
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San Francisco in May - FAQ
What are the expected maximum and minimum temperatures in San Francisco during May?
How much rainfall should be expected in San Francisco during May?
What are the typical wind conditions in San Francisco during May?
May rainfall patterns in San Francisco
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Where is San Francisco?Get accurate weather forecasts for San Francisco, located at latitude 37.775 and longitude -122.419. Stay updated with localized weather information tailored for San Francisco.