warnings updated: Friday, October 30, 2026, 2:18 am PDT
NWS San Diego Forecast Discussion – Synopsis
Issued 1122 PM PDT Thu Oct 29 2026
Cloudier and cooler weather will continue into the weekend. A weather system will move into the area, bringing the chance of widespread rainfall this weekend, heaviest of which will occur late Saturday into Sunday morning. Slightly warmer and drier weather is expected by Monday into at least the middle of next week.
Covers extreme southwestern California, including Orange, San Diego, western Riverside and southwestern San Bernardino counties.
Almanac information is for the Palm Springs Airport and is provided by the National Weather Service.
High86°normal101° record (1966)
Low60°normal35° record (1971)
Sunrise7:04am
Sunset5:56pm
Moonrise10:04pm
Moonset12:12pm
Illumination81%
Evaporative Cooler Effectiveness by City
Thousand Palms
Outside Temp70°F
Dew Point56°F
Est. Output63°F
Updated: Oct 30, 2:22 AM PDT
It's already a comfortable 70°F outside — running the cooler isn't needed.
Palm Desert (Hwy 111 & El Paseo)
Outside Temp67°F
Dew Point58°F
Est. Output62°F
Updated: Oct 30, 2:12 AM PDT
It's already a comfortable 67°F outside — running the cooler isn't needed.
Palm Springs Airport
Outside Temp69°F
Dew Point56°F
Est. Output62°F
Updated: Oct 30, 1:53 AM PDT
It's already a comfortable 69°F outside — running the cooler isn't needed.
Thermal Airport
Outside Temp72°F
Dew Point55°F
Est. Output64°F
Updated: Oct 30, 1:52 AM PDT
It's already a comfortable 72°F outside — running the cooler isn't needed.
How to Read This
Score
0–100, based on the wet-bulb depression — how much cooler the air could get versus the actual outside temperature. Drier air means more room to cool, so a bigger gap scores higher.
Wet-Bulb Depression
The gap between the outside (dry-bulb) temperature and the wet-bulb temperature — the coolest evaporation alone could get the air. A bigger gap means drier air and more room for the cooler to work with.
Estimated(Est.) Output
The approximate temperature of the air coming out of the cooler, estimated by cooling the outside temperature most of the way toward the wet-bulb temperature.
Efficiency
These numbers assume 80% saturation efficiency — typical for a well-maintained direct (single-stage) evaporative cooler.
Lower dew point + higher temp = better cooling
(This guide generally will work for misting systems also)
