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San Bernardino County (San Bernardino)
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United States weather

Weather in San Bernardino County, California for April 2026

Your guide to San Bernardino County weather in April - trends and predictions

    Temperatures

  • In general, the average temperature in San Bernardino County at the beginning of April is 18.3 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 19.4 °F by the end of April.

    • Rain 🌧️

  • San Bernardino County experiences moderate rainfall in April, with an average of 6 rainy days and a total precipitation of 56.9 mm.

    • More

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Average dry days
24
Dry days
Average rainy days
6
Rainy days
Average snowy days
0
Snow days
Average temperatures
21°/9°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
54 %
Avg humidity

San Bernardino County Weather April

Move between months or click on a day
March
May
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
17°
2
Sunny
19°
3
Sunny
18°
4
Patchy rain possible
17°
5
Light rain shower
17°
6
Sunny
20°
7
Partly cloudy
20°
8
Sunny
22°
9
Sunny
27°
10
Sunny
28°
11
Sunny
29°
12
Sunny
24°
13
Light rain shower
20°
14
Light rain shower
20°
15
Patchy rain possible
20°
16
Sunny
21°
17
Partly cloudy
18°
18
Overcast
20°
19
Sunny
24°
20
Sunny
25°
21
Sunny
26°
22
Sunny
24°
23
Patchy rain possible
21°
24
Partly cloudy
20°
25
Patchy rain possible
14°
26
Patchy rain possible
13°
27
Sunny
18°
28
Sunny
22°
29
Sunny
25°
30
Sunny
24°

Temperatures trend during April in San Bernardino County

See the weather trend as well as the moving average line

April weather in San Bernardino County day by day

Click on a date for more information
March May
Date Weather Temperatures Rain UV More
Apr. 1 Sunny
Sunny
 17° /6° 0 mm 4
Apr. 2 Sunny
Sunny
 19° /5° 0 mm 6
Apr. 3 Sunny
Sunny
 18° /7° 0 mm 5
Apr. 4 Patchy rain possible
Patchy rain possible
 17° /5° 0.2 mm 5
Apr. 5 Light rain shower
Light rain shower
 17° /4° 4.8 mm 5
Apr. 6 Sunny
Sunny
 20° /6° 0 mm 6
Apr. 7 Partly cloudy
Partly cloudy
 20° /8° 0 mm 6
Apr. 8 Sunny
Sunny
 22° /7° 0 mm 6
Apr. 9 Sunny
Sunny
 27° /11° 0 mm 7
Apr. 10 Sunny
Sunny
 28° /13° 0 mm 7
Apr. 11 Sunny
Sunny
 29° /15° 0 mm 7
Apr. 12 Sunny
Sunny
 24° /12° 0 mm 6
Apr. 13 Light rain shower
Light rain shower
 20° /9° 1.7 mm 5
Apr. 14 Light rain shower
Light rain shower
 20° /8° 3.2 mm 5
Apr. 15 Patchy rain possible
Patchy rain possible
 20° /7° 0.3 mm 5
Apr. 16 Sunny
Sunny
 21° /8° 0 mm 6
Apr. 17 Partly cloudy
Partly cloudy
 18° /9° 43.8 mm 5
Apr. 18 Overcast
Overcast
 20° /11° 1.6 mm 5
Apr. 19 Sunny
Sunny
 24° /8° 0 mm 6
Apr. 20 Sunny
Sunny
 25° /10° 0 mm 7
Apr. 21 Sunny
Sunny
 26° /13° 0 mm 6
Apr. 22 Sunny
Sunny
 24° /12° 0 mm 7
Apr. 23 Patchy rain possible
Patchy rain possible
 21° /11° 0 mm 5
Apr. 24 Partly cloudy
Partly cloudy
 20° /7° 0 mm 6
Apr. 25 Patchy rain possible
Patchy rain possible
 14° /7° 1 mm 4
Apr. 26 Patchy rain possible
Patchy rain possible
 13° /6° 0.4 mm 3
Apr. 27 Sunny
Sunny
 18° /6° 0 mm 5
Apr. 28 Sunny
Sunny
 22° /8° 0 mm 5
Apr. 29 Sunny
Sunny
 25° /10° 0 mm 7
Apr. 30 Sunny
Sunny
 24° /12° 0 mm 6
Next
Important Notice
Our weather forecast for San Bernardino County in April 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 April - FAQ

What are the expected maximum and minimum temperatures in San Bernardino County during April?

Enjoy moderate daytime temperatures of up to 21° and cooler nights around 9°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in San Bernardino County during April?

Moderate rainfall is anticipated in San Bernardino County during April, with a total of 56.9 mm spread over approximately 6 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in San Bernardino County during April?

The average wind speed in San Bernardino County during April is 17 km/h, suggesting breezy to windy conditions, depending on your activities.

April rainfall patterns in San Bernardino County

Explore the daily rainfall trends and prepare for San Bernardino Countys April weather 💧
Typically, San Bernardino County has 6 rainy days in April with a total of 56.9 mm of rainfall.

UV exposure in San Bernardino County during April

Stay informed about UV levels for safe outdoor activities throughout the month of April ☀️
Top locations in San Bernardino County
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Big Bear LakeFontanaOntarioRancho CucamongaSan Bernardino
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Location coordinates 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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