warnings updated: Tuesday, November 10, 2026, 9:03 am PST
NWS San Diego Forecast Discussion – Synopsis
Issued 329 AM PST Tue Nov 10 2026
High pressure aloft and weak offshore lower-level flow will continue well-above average high temperatures for the coast and western valleys through Wednesday. Cooling will begin to spread inland on Thursday with slower cooling and chances for showers for Friday through Monday.
Covers extreme southwestern California, including Orange, San Diego, western Riverside and southwestern San Bernardino counties.
Much cooler weather as a storm system moves in. Highs in the 70s in the coastal basin, lower 80s in the low desert, upper 60s in the High Desert, and 50s to lower 60s in the mountains.
Data Courtesy of San Diego Weather Forecast Office
Almanac information is for the Palm Springs Airport and is provided by the National Weather Service.
High81°normal96° record (1989)
Low56°normal35° record (1946)
Sunrise6:14am
Sunset4:46pm
Moonrise7:44am
Moonset5:30pm
Illumination1%
Evaporative Cooler Effectiveness by City
Thousand Palms
Outside Temp78°F
Dew Point43°F
Est. Output63°F
Updated: Nov 10, 9:09 AM PST
Palm Desert (Hwy 111 & El Paseo)
Outside Temp74°F
Dew Point53°F
Est. Output64°F
Updated: Nov 10, 8:59 AM PST
It's already a comfortable 74°F outside — running the cooler isn't needed.
Palm Springs Airport
Outside Temp77°F
Dew Point44°F
Est. Output62°F
Updated: Nov 10, 8:53 AM PST
Thermal Airport
Outside Temp73°F
Dew Point45°F
Est. Output60°F
Updated: Nov 10, 8:52 AM PST
It's already a comfortable 73°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)
