| National Weather Service Forecast for:
Fontana CA Issued by: National Weather Service San Diego, CA |
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| Updated: 12:05 pm PDT Jul 12, 2026 | ||||||||||||||||||
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| Tonight |
Partly cloudy, with a low around 67. Southwest wind 5 to 10 mph becoming light and variable in the evening. |
| Monday |
Partly sunny, with a high near 94. Light southwest wind becoming west 5 to 10 mph in the afternoon. |
| Monday Night |
Mostly cloudy, with a low around 68. Southwest wind 5 to 10 mph becoming light after midnight. |
| Tuesday |
Sunny, with a high near 99. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph. |
| Tuesday Night |
Mostly clear, with a low around 72. Southwest wind 5 to 10 mph becoming light northwest in the evening. Winds could gust as high as 20 mph. |
| Wednesday |
Sunny, with a high near 105. |
| Wednesday Night |
Mostly clear, with a low around 75. |
| Thursday |
A slight chance of showers after 11am. Mostly sunny, with a high near 100. |
| Thursday Night |
A slight chance of showers before 11pm. Partly cloudy, with a low around 70. |
| Friday |
A slight chance of showers after 11am. Mostly sunny, with a high near 94. |
| Friday Night |
A slight chance of showers. Partly cloudy, with a low around 67. |
| Saturday |
A slight chance of showers. Mostly sunny, with a high near 92. |
| Saturday Night |
A slight chance of showers. Mostly clear, with a low around 67. |
| Sunday |
A slight chance of showers. Sunny, with a high near 91. |
Forecast from NOAA-NWS for Fontana CA.
