warnings updated: Saturday, October 31, 2026, 2:03 am PDT
NWS San Diego Forecast Discussion – Synopsis
Issued 1111 PM PDT Fri Oct 30 2026
Widely scattered light showers will continue for the coastal basin through tonight, lingering at the coast through early Saturday. More widespread light rain will return Saturday evening with short periods of moderate to heavy rain late Saturday night into Sunday morning. Showers are expected to decrease on Sunday afternoon and end by Monday morning. Dry and warmer for Monday and Tuesday with high temperatures warming to around average on Tuesday.
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.
High86°normal102° record (1966)
Low59°normal36° record (1971)
Sunrise7:05am
Sunset5:55pm
Moonrise11:16pm
Moonset1:02pm
Illumination72%
Evaporative Cooler Effectiveness by City
Thousand Palms
Outside Temp67°F
Dew Point52°F
Est. Output60°F
Updated: Oct 31, 2:17 AM PDT
It's already a comfortable 67°F outside — running the cooler isn't needed.
Estimated output is 60°F — air may come out uncomfortably cool.
Palm Desert (Hwy 111 & El Paseo)
Outside Temp63°F
Dew Point53°F
Est. Output58°F
Updated: Oct 31, 2:09 AM PDT
It's already a comfortable 63°F outside — running the cooler isn't needed.
Estimated output is 58°F — air may come out uncomfortably cool.
Palm Springs Airport
Outside Temp64°F
Dew Point51°F
Est. Output58°F
Updated: Oct 31, 1:53 AM PDT
It's already a comfortable 64°F outside — running the cooler isn't needed.
Estimated output is 58°F — air may come out uncomfortably cool.
Thermal Airport
Outside Temp66°F
Dew Point52°F
Est. Output59°F
Updated: Oct 31, 1:52 AM PDT
It's already a comfortable 66°F outside — running the cooler isn't needed.
Estimated output is 59°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)
