San Francisco
May
Weather in San Francisco for May 2025
Your guide to San Francisco weather in May - trends and predictions
In general, the average temperature in San Francisco at the beginning of May is 15.6 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 17.3 °F by the end of May.
With an average of 2 rainy days, San Francisco experiences minimal rainfall in May, ensuring that most days remain pleasantly dry.
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29
Dry days
2
Rainy days
0
Snow days
19°/10°
Temperatures
20 km/h
Avg max wind
74 %
Avg humidity
San Francisco in May average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  16° | 2  16° | 3 17° | 4 14° | |||
| 5 15° | 6 15° | 7  16° | 8 18° | 9 20° | 10  19° | 11 18° |
| 12 19° | 13 21° | 14 20° | 15 19° | 16 20° | 17  19° | 18 19° |
| 19 18° | 20 18° | 21 19° | 22 19° | 23 17° | 24 17° | 25  16° |
| 26 17° | 27 17° | 28 16° | 29 18° | 30 19° | 31 18° |
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Temperatures trend during May in San Francisco
See the weather trend as well as the moving average line
May weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 | Patchy rain possible | 16° /9° | 0.8 mm | 4 | |
| May 2 | Moderate rain at times | 16° /9° | 3.7 mm | 4 | |
| May 3 | Moderate rain at times | 17° /9° | 5.2 mm | 5 | |
| May 4 | Moderate rain at times | 14° /8° | 10.7 mm | 4 | |
| May 5 | Patchy rain possible | 15° /8° | 0.2 mm | 4 | |
| May 6 | Patchy rain possible | 15° /9° | 1 mm | 4 | |
| May 7 | Partly cloudy | 16° /8° | 0 mm | 5 | |
| May 8 | Patchy rain possible | 18° /9° | 0.2 mm | 5 | |
| May 9 | Patchy rain possible | 20° /11° | 0.1 mm | 5 | |
| May 10 | Sunny | 19° /10° | 0 mm | 6 | |
| May 11 | Sunny | 18° /10° | 0 mm | 5 | |
| May 12 | Sunny | 19° /10° | 0 mm | 5 | |
| May 13 | Sunny | 21° /11° | 0 mm | 6 | |
| May 14 | Sunny | 20° /11° | 0 mm | 6 | |
| May 15 | Partly cloudy | 19° /11° | 0 mm | 6 | |
| May 16 | Sunny | 20° /11° | 0 mm | 6 | |
| May 17 | Overcast | 19° /11° | 0.1 mm | 5 | |
| May 18 | Partly cloudy | 19° /10° | 0 mm | 6 | |
| May 19 | Partly cloudy | 18° /10° | 0 mm | 5 | |
| May 20 | Partly cloudy | 18° /10° | 0 mm | 5 | |
| May 21 | Sunny | 19° /11° | 0 mm | 5 | |
| May 22 | Sunny | 19° /10° | 0 mm | 6 | |
| May 23 | Overcast | 17° /10° | 0 mm | 5 | |
| May 24 | Partly cloudy | 17° /10° | 0.1 mm | 4 | |
| May 25 | Cloudy | 16° /9° | 0.2 mm | 4 | |
| May 26 | Overcast | 17° /10° | 0 mm | 5 | |
| May 27 | Overcast | 17° /10° | 0 mm | 5 | |
| May 28 | Patchy rain possible | 16° /10° | 0.2 mm | 4 | |
| May 29 | Cloudy | 18° /10° | 0 mm | 4 | |
| May 30 | Partly cloudy | 19° /11° | 0 mm | 6 | |
| May 31 | Overcast | 18° /11° | 0 mm | 5 | |
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Important Notice
Our weather forecast for 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 San Francisco forecast closer to your planned date for the most up-to-date weather information.
San Francisco in May - FAQ
What are the expected maximum and minimum temperatures in San Francisco during May?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in San Francisco during May?
In May, San Francisco can expect light to moderate rainfall, totaling 44.7 mm across approximately 2 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in San Francisco during May?
The average wind speed in San Francisco during May is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
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