warnings updated: Monday, October 26, 2026, 12:48 am PDT
NWS San Diego Forecast Discussion – Synopsis
Issued 949 PM PDT Sun Oct 25 2026
Near to slightly above average temperatures through Monday, then gradually cooler for the middle to end of the week. Unsettled weather expected for the end of the week with increased winds and chance of precipitation. Tides will remain elevated through much of this 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.
High88°normal101° record (1937)
Low61°normal41° record (1956)
Sunrise7:01am
Sunset6:00pm
Moonrise6:10pm
Moonset7:37am
Illumination99%
Evaporative Cooler Effectiveness by City
Thousand Palms
Outside Temp67°F
Dew Point44°F
Est. Output57°F
Updated: Oct 26, 12:49 AM PDT
It's already a comfortable 67°F outside — running the cooler isn't needed.
Estimated output is 57°F — air may come out uncomfortably cool.
Palm Desert (Hwy 111 & El Paseo)
Outside Temp65°F
Dew Point49°F
Est. Output57°F
Updated: Oct 26, 12:43 AM PDT
It's already a comfortable 65°F outside — running the cooler isn't needed.
Estimated output is 57°F — air may come out uncomfortably cool.
Palm Springs Airport
Outside Temp70°F
Dew Point45°F
Est. Output59°F
Updated: Oct 25, 11:53 PM PDT
It's already a comfortable 70°F outside — running the cooler isn't needed.
Estimated output is 59°F — air may come out uncomfortably cool.
Thermal Airport
Outside Temp59°F
Dew Point48°F
Est. Output54°F
Updated: Oct 25, 11:52 PM PDT
It's already a comfortable 59°F outside — running the cooler isn't needed.
Estimated output is 54°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)
