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Johnston Field, CA Weather Forecast
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Johnston Field Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | TUESDAY | WEDNESDAY | THURSDAY |
 |  |  |  | | | | | | |
| Mostly Cloudy | Clearing | Sunny | Mostly Clear | Sunny | Mostly Clear | Clear | Clear | Clear | Clear |
| Hi: 91°FHi: 33°C | Lo: 70°FLo: 21°C | Hi: 91°FHi: 33°C | Lo: 71°FLo: 22°C | Hi: 91°FHi: 33°C | Lo: 70°FLo: 21°C | Hi: 89°FHi: 32°C Lo: 70°FLo: 21°C | Hi: 89°FHi: 32°C Lo: 70°FLo: 21°C | Hi: 89°FHi: 32°C Lo: 70°FLo: 21°C | Hi: 89°FHi: 32°C Lo: 70°FLo: 21°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 302 PM PDT Fri Oct 02 2026 
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Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1100 AM PDT Fri Oct 2 2026
Discussion
... A ridge of high pressure remains in place today and will remain in place for the next several days. Temperatures will therefore be well above average for the forseeable future, with high temperatures about 10-15 degrees above the average for this time of year. A moderate heat risk will likely remain in place throughout the Valley today with a 50-65% chance in the northern Valley and a 75-90% chance in the southern Valley. There is a possibility temperatures will reach above 95 degr...