San Bernardino County
May
Weather in San Bernardino County for May 2025
Your guide to San Bernardino County weather in May - trends and predictions
In general, the average temperature in San Bernardino County at the beginning of May is 23.1 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 24.9 °F by the end of May.
With an average of 4 rainy days, San Bernardino County experiences minimal rainfall in May, ensuring that most days remain pleasantly dry.
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27
Dry days
4
Rainy days
0
Snow days
25°/12°
Temperatures
15 km/h
Avg max wind
53 %
Avg humidity
San Bernardino County in May average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  25° | 2 27° | 3 26° | 4  22° | |||
| 5 17° | 6 22° | 7 23° | 8 26° | 9 27° | 10 28° | 11 28° |
| 12 29° | 13 28° | 14 25° | 15 24° | 16  25° | 17 26° | 18 25° |
| 19 24° | 20  30° | 21 29° | 22 27° | 23 25° | 24 23° | 25 22° |
| 26 24° | 27 26° | 28 26° | 29 25° | 30 26° | 31 25° |
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Temperatures trend during May in San Bernardino County
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 | Sunny | 25° /14° | 0 mm | 7 | |
| May 2 | Sunny | 27° /13° | 0 mm | 7 | |
| May 3 | Sunny | 26° /13° | 0 mm | 7 | |
| May 4 | Patchy rain possible | 22° /12° | 0.2 mm | 5 | |
| May 5 | Patchy rain possible | 17° /8° | 4.6 mm | 4 | |
| May 6 | Sunny | 22° /6° | 0 mm | 6 | |
| May 7 | Sunny | 23° /12° | 0 mm | 6 | |
| May 8 | Sunny | 26° /10° | 0 mm | 7 | |
| May 9 | Sunny | 27° /14° | 0 mm | 7 | |
| May 10 | Sunny | 28° /15° | 0 mm | 7 | |
| May 11 | Sunny | 28° /16° | 0 mm | 7 | |
| May 12 | Sunny | 29° /14° | 0 mm | 7 | |
| May 13 | Sunny | 28° /14° | 0 mm | 7 | |
| May 14 | Sunny | 25° /11° | 0 mm | 7 | |
| May 15 | Sunny | 24° /11° | 0 mm | 6 | |
| May 16 | Partly cloudy | 25° /13° | 0 mm | 7 | |
| May 17 | Partly cloudy | 26° /13° | 0 mm | 7 | |
| May 18 | Sunny | 25° /12° | 0 mm | 7 | |
| May 19 | Sunny | 24° /10° | 0 mm | 6 | |
| May 20 | Overcast | 30° /14° | 0 mm | 7 | |
| May 21 | Overcast | 29° /15° | 0 mm | 6 | |
| May 22 | Sunny | 27° /14° | 0 mm | 7 | |
| May 23 | Sunny | 25° /12° | 0 mm | 7 | |
| May 24 | Patchy rain possible | 23° /12° | 0.2 mm | 6 | |
| May 25 | Partly cloudy | 22° /10° | 0.1 mm | 6 | |
| May 26 | Sunny | 24° /9° | 0.1 mm | 7 | |
| May 27 | Sunny | 26° /12° | 0 mm | 7 | |
| May 28 | Partly cloudy | 26° /13° | 0 mm | 7 | |
| May 29 | Patchy rain possible | 25° /12° | 0.4 mm | 6 | |
| May 30 | Patchy rain possible | 26° /14° | 0.6 mm | 7 | |
| May 31 | Patchy rain possible | 25° /11° | 0.3 mm | 6 | |
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Important Notice
Our weather forecast for San Bernardino County 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 County forecast closer to your planned date for the most up-to-date weather information.
San Bernardino County in May - FAQ
What are the expected maximum and minimum temperatures in San Bernardino County 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 County during May?
Rainfall in San Bernardino County during May is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 4 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 County during May?
The average wind speed in San Bernardino County during May is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
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Where is San Bernardino County?Get accurate weather forecasts for San Bernardino County, located at latitude 34.108 and longitude -117.29. Stay updated with localized weather information tailored for San Bernardino County.
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