climatesince.com

The hottest, coldest and wettest since, for US cities and counties

Saturday : a high of 105°F in San Diego, CA, the warmest 3 October on record, in 152 years since 1875; matching the National Weather Service report.

San Diego, CA

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Records

On Saturday 3 October 2026, 28 of 388 US cities set or tied a daily record (our calculation from NOAA records; preliminary).

The month so far

October 2026 so far: 303 of 366 US cities are running warmer than their own 1991 to 2020 normal.

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