San Diego Weather - Average Annual Temperature


Environment - Annual Average Temperature (from NOAA)
John S. Stokes III
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San Diego average temperature by year in Fahrenheit: 1852 through 2023
Information obtained from various sources including the National Weather Service
This chart is updated annually in early January

Analysis

The overall presentation shows increasing temperatures longterm. There is no sign of run-away termperatures.

Year 2023 - Posted January 1, 2024: 2023 continues a cooling trend with the coldest year in 13 years. The very long term is trending warmer but with even less conviction. 2023's 63.1 degree average is 1.37 degrees below the average of the last 50 years.

Year 2022 - Posted January 1, 2023: 2022 continues a cooling trend with the coldest year in 11 years. The very long term is trending warmer but with less conviction.

Year 2021 - Posted January 1, 2022: 2021 was noticably cooler than last year, but warmer than the previous year. The long term upward trend remains intact.

Year 2020 - Posted January 1, 2021: 2020 was the 9th warmest in San Diego since records began in 1852, with an annual average of 66.01 reasserting the long term upward channel.

Year 2019 - Posted January 1, 2020: 2019 was the coolest in San Diego of the last six years. While 64.43 is still above the normal of 62.5, the reading is towards the low end of the long term upward channel. August was notably cooler than last year, coming in at 71.6 versus the much above normal 78.1.

Year 2018 - Posted January 1, 2019: The streak of annual average temperatures above 66 degrees Fahrenheit continued with a record fifth year in a row in 2018. One month set a new record high average temperature, August with 78.1 degrees. January came up .2 degrees shy of its record of 61.7 at 61.5 degrees.

Year 2017 - Posted January 1, 2018: Since 2014, when the warmest year (average 67.54 degrees Fahrenheit) was recorded in San Diego since records began in 1852, we've had four consecutive years with the annual average temperature above 66 degrees. This is impressive because 66 degrees was reached just three times in the prior 162 years! So four of the seven years with the average temperature above 66 degrees during the 166 year history belong to a current streak!