| National Weather Service Forecast for:
Fontana CA Issued by: National Weather Service San Diego, CA |
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| Updated: 1:29 pm PST Dec 16, 2025 | ||||||||||||||||||
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| Tonight |
Mostly cloudy, with a low around 54. Calm wind. |
| Wednesday |
Sunny, with a high near 77. Calm wind becoming southwest around 5 mph in the afternoon. |
| Wednesday Night |
Clear, with a low around 55. North wind around 5 mph. |
| Thursday |
Sunny, with a high near 83. Northeast wind around 5 mph becoming calm in the afternoon. |
| Thursday Night |
Mostly clear, with a low around 57. Calm wind becoming northeast around 5 mph after midnight. |
| Friday |
Sunny, with a high near 80. |
| Friday Night |
Mostly clear, with a low around 55. |
| Saturday |
Sunny, with a high near 78. |
| Saturday Night |
Partly cloudy, with a low around 55. |
| Sunday |
Mostly sunny, with a high near 77. |
| Sunday Night |
Partly cloudy, with a low around 54. |
| Monday |
Mostly sunny, with a high near 78. |
| Monday Night |
Partly cloudy, with a low around 53. |
| Tuesday |
A slight chance of showers. Mostly sunny, with a high near 74. |
Forecast from NOAA-NWS for Fontana CA.
