Annual mean
Annual mean of daily highs
Annual mean of daily lows
Rossmoor CDP, California
Official LSAD Designation: Rossmoor CDP • Census GEOID: 0663050
• Orange County
Climate Normals & Weather Observations
30-year climate normals (1991–2020) and weather observations for Rossmoor CDP.
Reference Weather Station: LONG BEACH DAUGHERTY FLD, CA US (ID: USW00023129)
• Located 4.1 miles from community center
• Elevation: 9.4 m
| Month | Average High (°F) | Average Low (°F) | Mean Temp (°F) | Precipitation (in) |
|---|---|---|---|---|
| January | 67.4° | 46.9° | 57.1° | 2.89" |
| February | 66.8° | 48.4° | 57.6° | 3.02" |
| March | 68.6° | 51.2° | 59.9° | 1.65" |
| April | 71.4° | 53.9° | 62.7° | 0.56" |
| May | 73.1° | 57.9° | 65.5° | 0.26" |
| June | 76.1° | 61.3° | 68.7° | 0.07" |
| July | 81.4° | 64.9° | 73.1° | 0.05" |
| August | 83.2° | 65.5° | 74.3° | 0.01" |
| September | 82.4° | 63.9° | 73.1° | 0.08" |
| October | 77.7° | 59.1° | 68.4° | 0.53" |
| November | 72.5° | 51.6° | 62.0° | 0.75" |
| December | 66.7° | 46.6° | 56.7° | 2.15" |
Annual Temperature History
2010–2025, completed calendar years only.
NOAA station LONG BEACH DAUGHERTY FLD, CA US (ID: USW00023129) • 4.1 miles from community center .
This is the same reference station used for monthly normals.
Source: NOAA NCEI Global Summary of the Year.
Annual temperature data table (°F)
| Year | Annual mean (°F) | Annual mean of daily highs (°F) | Annual mean of daily lows (°F) |
|---|---|---|---|
| 2010 | 63.2 | 72.2 | 54.3 |
| 2011 | 63.5 | 73.0 | 54.1 |
| 2012 | 65.6 | 75.0 | 56.2 |
| 2013 | 65.3 | 74.9 | 55.7 |
| 2014 | 67.7 | 77.0 | 58.4 |
| 2015 | 68.4 | 77.9 | 58.9 |
| 2016 | 66.6 | 75.8 | 57.4 |
| 2017 | 66.8 | 76.0 | 57.7 |
| 2018 | 67.1 | 76.1 | 58.1 |
| 2019 | 65.5 | 74.2 | 56.8 |
| 2020 | 65.8 | 75.2 | 56.4 |
| 2021 | 64.7 | 73.7 | 55.8 |
| 2022 | 66.7 | 76.1 | 57.3 |
| 2023 | 65.4 | 74.0 | 56.9 |
| 2024 | 65.8 | 74.3 | 57.2 |
| 2025 | 65.2 | 73.7 | 56.7 |
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.