| National Weather Service Forecast for:
3 Miles SW Fontana CA Issued by: National Weather Service San Diego, CA |
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| Updated: 12:34 am PDT Aug 20, 2026 | ||||||||||||||||||
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| Overnight |
Clear, with a low around 71. Calm wind. |
| Thursday |
Mostly sunny, with a high near 101. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph. |
| Thursday Night |
Mostly clear, with a low around 71. West wind 5 to 10 mph becoming light and variable in the evening. |
| Friday |
Sunny, with a high near 101. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph. |
| Friday Night |
Mostly clear, with a low around 70. Southwest wind 5 to 10 mph becoming light in the evening. |
| Saturday |
Sunny, with a high near 100. |
| Saturday Night |
Clear, with a low around 70. |
| Sunday |
Sunny, with a high near 99. |
| Sunday Night |
Mostly clear, with a low around 70. |
| Monday |
Sunny, with a high near 99. |
| Monday Night |
Mostly clear, with a low around 71. |
| Tuesday |
Sunny, with a high near 100. |
| Tuesday Night |
Mostly clear, with a low around 72. |
| Wednesday |
Sunny, with a high near 100. |
Forecast from NOAA-NWS for 3 Miles SW Fontana CA.
