warnings updated: Thursday, November 12, 2026, 6:33 am PST
NWS San Diego Forecast Discussion – Synopsis
Issued 341 AM PST Thu Nov 12 2026
Warm and dry today, then cooler with periods of showers tonight through at least the middle of next week. The first round of precipiation is expected late tonight into Friday morning. The next chance will be Friday evening into Saturday, with more widespread light to locally moderate showers. In addition to periods of rain, winds are expected to increase over the mountains and deserts. Sunday could see mostly dry conditions with our next chances of precipitation and increased winds at times Monday through Wednesday.
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.
High80°normal95° record (1933)
Low55°normal34° record (1950)
Sunrise6:16am
Sunset4:45pm
Moonrise9:34am
Moonset7:10pm
Illumination10%
Evaporative Cooler Effectiveness by City
Thousand Palms
Outside Temp58°F
Dew Point39°F
Est. Output50°F
Updated: Nov 12, 6:39 AM PST
It's already a comfortable 58°F outside — running the cooler isn't needed.
Estimated output is 50°F — air may come out uncomfortably cool.
Palm Desert (Hwy 111 & El Paseo)
Outside Temp57°F
Dew Point45°F
Est. Output52°F
Updated: Nov 12, 6:33 AM PST
It's already a comfortable 57°F outside — running the cooler isn't needed.
Estimated output is 52°F — air may come out uncomfortably cool.
Palm Springs Airport
Outside Temp61°F
Dew Point37°F
Est. Output51°F
Updated: Nov 12, 5:53 AM PST
It's already a comfortable 61°F outside — running the cooler isn't needed.
Estimated output is 51°F — air may come out uncomfortably cool.
Thermal Airport
Outside Temp51°F
Dew Point42°F
Est. Output47°F
Updated: Nov 12, 5:52 AM PST
It's already a comfortable 51°F outside — running the cooler isn't needed.
Estimated output is 47°F — air may come out uncomfortably cool.
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)
