San Bernardino (CA)
May
Weather in San Bernardino, California for May 2026
Your guide to San Bernardino weather in May - trends and predictions
In general, the average temperature in San Bernardino at the beginning of May is 21.1 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 26.1 °F by the end of May.
Precipitation in San Bernardino during May is a rare event, with an average of fewer than 2 rainy days.
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Temperatures
Rain 🌧️
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30
Dry days
1
Rainy days
0
Snow days
25°/12°
Temperatures
15 km/h
Avg max wind
51 %
Avg humidity
San Bernardino Weather May
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Temperatures trend during May in San Bernardino
See the weather trend as well as the moving average line
May weather in San Bernardino day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Sunny | 24° /11° | 0 mm | 7 | |
| May 2 | Sunny | 24° /11° | 0 mm | 7 | |
| May 3 | Sunny | 23° /11° | 0 mm | 6 | |
| May 4 |  Patchy rain possible | 18° /9° | 0.1 mm | 4 | |
| May 5 | Patchy rain possible | 16° /8° | 2.3 mm | 4 | |
| May 6 | Sunny | 20° /7° | 0 mm | 5 | |
| May 7 | Sunny | 23° /10° | 0 mm | 6 | |
| May 8 | Sunny | 28° /10° | 0 mm | 7 | |
| May 9 | Sunny | 31° /15° | 0 mm | 8 | |
| May 10 | Sunny | 33° /17° | 0 mm | 8 | |
| May 11 | Sunny | 30° /18° | 0 mm | 7 | |
| May 12 | Sunny | 26° /12° | 0 mm | 7 | |
| May 13 | Sunny | 21° /10° | 0 mm | 5 | |
| May 14 | Sunny | 24° /10° | 0 mm | 7 | |
| May 15 | Sunny | 25° /12° | 0 mm | 7 | |
| May 16 |  Partly cloudy | 23° /12° | 0 mm | 6 | |
| May 17 | Partly cloudy | 20° /11° | 0 mm | 5 | |
| May 18 | Sunny | 23° /10° | 0 mm | 6 | |
| May 19 | Sunny | 27° /9° | 0 mm | 7 | |
| May 20 |  Overcast | 32° /16° | 0 mm | 8 | |
| May 21 | Overcast | 31° /16° | 0 mm | 7 | |
| May 22 | Sunny | 29° /15° | 0 mm | 7 | |
| May 23 | Sunny | 26° /12° | 0 mm | 7 | |
| May 24 | Patchy rain possible | 23° /11° | 0.1 mm | 6 | |
| May 25 | Partly cloudy | 23° /9° | 0 mm | 5 | |
| May 26 | Sunny | 24° /9° | 0 mm | 6 | |
| May 27 | Sunny | 27° /11° | 0 mm | 7 | |
| May 28 | Partly cloudy | 26° /13° | 0 mm | 7 | |
| May 29 | Sunny | 27° /12° | 0.3 mm | 7 | |
| May 30 | Sunny | 29° /15° | 0.4 mm | 7 | |
| May 31 | Patchy rain possible | 27° /14° | 0.2 mm | 6 | |
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Important Notice
Our weather forecast for San Bernardino 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 Bernardino forecast closer to your planned date for the most up-to-date weather information.
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San Bernardino in May - FAQ
What are the expected maximum and minimum temperatures in San Bernardino during May?
Enjoy moderate daytime temperatures of up to 25° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in San Bernardino during May?
Rainfall in San Bernardino during May is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 1 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in San Bernardino during May?
The average wind speed in San Bernardino during May is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in San Bernardino
Explore the daily rainfall trends and prepare for San Bernardinos May weather 💧
UV exposure in San Bernardino during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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Where is San Bernardino?Get accurate weather forecasts for San Bernardino, located at latitude 34.108 and longitude -117.29. Stay updated with localized weather information tailored for San Bernardino.
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