warnings updated: Wednesday, November 04, 2026, 1:03 am PST
NWS San Diego Forecast Discussion – Synopsis
Issued 922 PM PST Tue Nov 3 2026
Quiet weather with slightly below normal temperatures through Wednesday and gusty winds over the coastal waters. Warmer and drier weather returns late week, with well-above-normal temperatures and weak to moderate Santa Ana winds for the weekend.
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.
High84°normal98° record (2020)
Low58°normal35° record (1956)
Sunrise6:09am
Sunset4:51pm
Moonrise1:37am
Moonset2:16pm
Illumination31%
Evaporative Cooler Effectiveness by City
Thousand Palms
Outside Temp68°F
Dew Point46°F
Est. Output58°F
Updated: Nov 4, 1:04 AM PST
It's already a comfortable 68°F outside — running the cooler isn't needed.
Estimated output is 58°F — air may come out uncomfortably cool.
Palm Desert (Hwy 111 & El Paseo)
Outside Temp58°F
Dew Point47°F
Est. Output53°F
Updated: Nov 4, 1:04 AM PST
It's already a comfortable 58°F outside — running the cooler isn't needed.
Estimated output is 53°F — air may come out uncomfortably cool.
Palm Springs Airport
Outside Temp62°F
Dew Point43°F
Est. Output54°F
Updated: Nov 4, 12:53 AM PST
It's already a comfortable 62°F outside — running the cooler isn't needed.
Estimated output is 54°F — air may come out uncomfortably cool.
Thermal Airport
Outside Temp65°F
Dew Point48°F
Est. Output57°F
Updated: Nov 4, 12:52 AM PST
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.
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)
