Downtown Los Angeles skyline. Los Angeles Almanac Photo.
Also see:
-- Monthly Climate Normals for Selected L.A. County Locations
-- Temperature Normals & Records by Day in Downtown L.A.
-- Monthly High/Low & Average Temperatures for Downtown Los Angeles
-- Temperature Records for Select Los Angeles County Locations
Every ten years, as the U.S. Census counts the population, the National Centers for Environmental Information (an agency within NOAA) updates "normal" (or mean or average) temperatures and rainfall, by month and year, for U.S. weather stations. Normals are calculated from daily weather data collected over a 30-year period. Current normals are calculated from the latest 30-year period of 1991 through 2020. The period before that was calculated for the years 1981 through 2010.
| Period | 1991-2020 | 1981-2010 | 1971-2000 | 1961-1990 | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Mean Temperature (F) | Mean Rainfall (in.) | Mean Temperature (F) | Mean Rainfall (in.) | Mean Temperature (F) | Mean Rainfall (in.) | Mean Temperature (F) | Mean Rainfall (in.) | |||
| Jan | 58.4 | 3.29 | 58.0 | 3.12 | 58.3 | 3.33 | 58.3 | 2.92 | |||
| Feb | 59.0 | 3.64 | 58.9 | 3.80 | 60.0 | 3.68 | 60.1 | 3.07 | |||
| Mar | 61.1 | 2.23 | 60.6 | 2.43 | 60.7 | 3.14 | 60.7 | 2.61 | |||
| Apr | 63.6 | 0.69 | 63.1 | 0.91 | 63.8 | 0.83 | 63.3 | 1.03 | |||
| May | 65.9 | 0.32 | 65.8 | 0.26 | 66.2 | 0.31 | 65.8 | 0.19 | |||
| Jun | 69.3 | 0.09 | 69.2 | 0.09 | 70.5 | 0.06 | 69.7 | 0.03 | |||
| Period | 1991-2020 | 1981-2010 | 1971-2000 | 1961-1990 | |||||||
| Month | Mean Temp. (F) | Mean Rainfall (in.) | Mean Temp. (F) | Mean Rainfall (in.) | Mean Temp. (F) | Mean Rainfall (in.) | Mean Temp. (F) | Mean Rainfall (in.) | |||
| Jul | 73.3 | 0.02 | 73.3 | 0.01 | 74.2 | 0.01 | 74.3 | 0.01 | |||
| Aug | 74.7 | 0.00 | 74.3 | 0.04 | 75.2 | 0.13 | 75.1 | 0.14 | |||
| Sep | 73.6 | 0.13 | 73.1 | 0.24 | 74.0 | 0.32 | 73.7 | 0.45 | |||
| Oct | 69.3 | 0.58 | 68.6 | 0.66 | 69.5 | 0.37 | 69.7 | 0.31 | |||
| Nov | 63.0 | 0.78 | 62.4 | 1.04 | 62.9 | 1.05 | 63.0 | 1.98 | |||
| Dec | 57.8 | 2.48 | 57.6 | 2.33 | 58.5 | 1.91 | 58.3 | 2.03 | |||
| Ann | 65.8 | 14.25 | 65.4 | 14.93 | 66.2 | 15.14 | 66.0 | 14.77 | |||
