San Bernardino County (Ontario)
March
Weather in San Bernardino County, California for March 2026
Your guide to San Bernardino County weather in March - trends and predictions
In general, the average temperature in San Bernardino County at the beginning of March is 12.1 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 15.6 °F by the end of March.
The climate of San Bernardino County in March is notably wet, with an average of 12 rainy days, and a total of 228 mm of precipitation.
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Temperatures
Rain 🌧️
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19
Dry days
12
Rainy days
0
Snow days
16°/7°
Temperatures
15 km/h
Avg max wind
67 %
Avg humidity
San Bernardino County Weather March
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Temperatures trend during March in San Bernardino County
See the weather trend as well as the moving average line
March weather in San Bernardino County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Mar. 1 |  Patchy rain possible | 11° /5° | 0.7 mm | 3 | |
| Mar. 2 | Light rain shower | 10° /5° | 9.8 mm | 3 | |
| Mar. 3 | Patchy rain possible | 11° /5° | 0.5 mm | 4 | |
| Mar. 4 |  Sunny | 15° /5° | 0 mm | 5 | |
| Mar. 5 |  Partly cloudy | 14° /5° | 29.7 mm | 4 | |
| Mar. 6 |  Light rain | 11° /5° | 44.4 mm | 3 | |
| Mar. 7 | Patchy rain possible | 13° /4° | 2.3 mm | 3 | |
| Mar. 8 | Sunny | 19° /5° | 0 mm | 5 | |
| Mar. 9 |  Overcast | 19° /8° | 0 mm | 5 | |
| Mar. 10 | Partly cloudy | 19° /7° | 0 mm | 6 | |
| Mar. 11 | Partly cloudy | 13° /5° | 13.9 mm | 4 | |
| Mar. 12 | Patchy rain possible | 14° /6° | 27 mm | 4 | |
| Mar. 13 | Sunny | 13° /6° | 52.2 mm | 4 | |
| Mar. 14 | Sunny | 10° /6° | 7.2 mm | 3 | |
| Mar. 15 | Patchy rain possible | 14° /5° | 0.1 mm | 4 | |
| Mar. 16 | Patchy rain possible | 17° /5° | 0.2 mm | 4 | |
| Mar. 17 | Patchy rain possible | 16° /7° | 0 mm | 4 | |
| Mar. 18 |  Thundery outbreaks possible | 19° /6° | 0.2 mm | 5 | |
| Mar. 19 | Sunny | 21° /8° | 0 mm | 6 | |
| Mar. 20 | Sunny | 21° /9° | 0 mm | 6 | |
| Mar. 21 | Sunny | 22° /8° | 0 mm | 6 | |
| Mar. 22 | Sunny | 21° /9° | 0 mm | 6 | |
| Mar. 23 | Light rain shower | 19° /9° | 2.2 mm | 5 | |
| Mar. 24 |  Patchy light rain with thunder | 21° /10° | 2.1 mm | 5 | |
| Mar. 25 | Sunny | 23° /11° | 0 mm | 6 | |
| Mar. 26 | Sunny | 17° /8° | 0 mm | 5 | |
| Mar. 27 | Overcast | 16° /7° | 0 mm | 4 | |
| Mar. 28 | Patchy rain possible | 16° /7° | 0 mm | 4 | |
| Mar. 29 | Sunny | 14° /7° | 0 mm | 4 | |
| Mar. 30 | Light rain shower | 10° /7° | 22.4 mm | 3 | |
| Mar. 31 | Patchy light rain with thunder | 13° /6° | 12.8 mm | 3 | |
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Important Notice
Our weather forecast for San Bernardino County in March 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.
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San Bernardino County in March - FAQ
What are the expected maximum and minimum temperatures in San Bernardino County during March?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 7°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in San Bernardino County during March?
Significant rainfall exceeding 228 mm is expected in San Bernardino County during March, occurring over more than 12 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in San Bernardino County during March?
The average wind speed in San Bernardino County during March is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
March rainfall patterns in San Bernardino County
Explore the daily rainfall trends and prepare for San Bernardino Countys March weather 💧
UV exposure in San Bernardino County during March
Stay informed about UV levels for safe outdoor activities throughout the month of March ☀️
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Where is San Bernardino County?Get accurate weather forecasts for San Bernardino County, located at latitude 34.063 and longitude -117.651. Stay updated with localized weather information tailored for San Bernardino County.
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