City and County of San Francisco (San Francisco)
May
Weather in City and County of San Francisco, California for May 2026
Your guide to City and County of San Francisco weather in May - trends and predictions
In general, the average temperature in City and County of San Francisco at the beginning of May is 16.6 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 17.4 °F by the end of May.
With an average of 3 rainy days, City and County of San Francisco experiences minimal rainfall in May.
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Temperatures
Rain 🌧️
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28
Dry days
3
Rainy days
0
Snow days
18°/10°
Temperatures
20 km/h
Avg max wind
72 %
Avg humidity
City and County of San Francisco Weather May
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Temperatures trend during May in City and County of San Francisco
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May weather in City and County of San Francisco day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Sunny | 16° /9° | 0.3 mm | 4 | |
| May 2 | Sunny | 16° /9° | 1.5 mm | 4 | |
| May 3 | Sunny | 18° /9° | 2.1 mm | 5 | |
| May 4 | Sunny | 17° /9° | 4.3 mm | 5 | |
| May 5 | Sunny | 17° /9° | 0.1 mm | 5 | |
| May 6 | Sunny | 16° /9° | 0.5 mm | 4 | |
| May 7 |  Partly cloudy | 16° /8° | 0 mm | 5 | |
| May 8 | Sunny | 17° /9° | 0.2 mm | 4 | |
| May 9 | Sunny | 17° /10° | 0.2 mm | 4 | |
| May 10 | Sunny | 18° /9° | 0 mm | 5 | |
| May 11 | Sunny | 18° /9° | 0 mm | 5 | |
| May 12 | Sunny | 17° /9° | 1.5 mm | 5 | |
| May 13 | Sunny | 18° /10° | 0 mm | 5 | |
| May 14 | Sunny | 18° /10° | 0 mm | 5 | |
| May 15 |  Overcast | 17° /10° | 0 mm | 4 | |
| May 16 |  Cloudy | 17° /10° | 0 mm | 4 | |
| May 17 | Overcast | 18° /10° | 0 mm | 4 | |
| May 18 | Sunny | 19° /9° | 0 mm | 5 | |
| May 19 | Sunny | 18° /10° | 0 mm | 5 | |
| May 20 | Sunny | 18° /9° | 0 mm | 5 | |
| May 21 | Sunny | 18° /10° | 0 mm | 5 | |
| May 22 | Sunny | 18° /9° | 0 mm | 5 | |
| May 23 | Sunny | 17° /9° | 0 mm | 5 | |
| May 24 | Sunny | 18° /10° | 0 mm | 4 | |
| May 25 | Partly cloudy | 17° /9° | 0.1 mm | 4 | |
| May 26 | Sunny | 16° /10° | 0 mm | 4 | |
| May 27 | Sunny | 17° /9° | 0 mm | 4 | |
| May 28 |  Patchy rain possible | 16° /10° | 0.1 mm | 4 | |
| May 29 | Cloudy | 18° /9° | 0 mm | 4 | |
| May 30 | Sunny | 19° /10° | 0 mm | 5 | |
| May 31 | Sunny | 19° /11° | 0 mm | 5 | |
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Important Notice
Our weather forecast for City and County of San Francisco in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the City and County of San Francisco forecast closer to your planned date for the most up-to-date weather information.
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City and County of San Francisco in May - FAQ
What are the expected maximum and minimum temperatures in City and County of San Francisco during May?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in City and County of San Francisco during May?
Expect minimal rainfall in City and County of San Francisco during May, with a total of 11.9 mm over approximately 3 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in City and County of San Francisco during May?
The average wind speed in City and County of San Francisco during May is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in City and County of San Francisco
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Where is City and County of San Francisco?Get accurate weather forecasts for City and County of San Francisco, located at latitude 37.775 and longitude -122.419. Stay updated with localized weather information tailored for City and County of San Francisco.
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