warnings updated: Sunday, November 01, 2026, 1:18 am PST
NWS San Diego Forecast Discussion – Synopsis
Issued 1121 PM PDT Sat Oct 31 2026
Isolated light showers will continue for the coastal basin this morning. More widespread moderate showers develop late this evening into Sunday morning, becoming more scattered during the day Sunday before tapering off Sunday afternoon and evening. Dry and warmer for the remainder of the week with highs near to a few degrees below normal each day.
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.
High85°normal102° record (1962)
Low59°normal30° record (1951)
Sunrise7:06am
Sunset5:54pm
Moonrise---
Moonset1:44pm
Illumination62%
Evaporative Cooler Effectiveness by City
Thousand Palms
Outside Temp64°F
Dew Point58°F
Est. Output61°F
Updated: Nov 1, 1:25 AM PST
It's already a comfortable 64°F outside — running the cooler isn't needed.
Palm Desert (Hwy 111 & El Paseo)
Outside Temp64°F
Dew Point61°F
Est. Output62°F
Updated: Nov 1, 1:23 AM PST
It's already a comfortable 64°F outside — running the cooler isn't needed.
Palm Springs Airport
Outside Temp64°F
Dew Point59°F
Est. Output61°F
Updated: Nov 1, 1:53 AM PDT
It's already a comfortable 64°F outside — running the cooler isn't needed.
Thermal Airport
Outside Temp65°F
Dew Point62°F
Est. Output63°F
Updated: Nov 1, 1:52 AM PDT
It's already a comfortable 65°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)
