Annual mean
Annual mean of daily highs
Annual mean of daily lows
San Leon CDP, Texas
Official LSAD Designation: San Leon CDP • Census GEOID: 4865564
• Galveston County
Climate Normals & Weather Observations
30-year climate normals (1991–2020) and weather observations for San Leon CDP.
Reference Weather Station: HOUSTON NWSO, TX US (ID: USC00414333)
• Located 8.6 miles from community center
• Elevation: 5.8 m
| Month | Average High (°F) | Average Low (°F) | Mean Temp (°F) | Precipitation (in) |
|---|---|---|---|---|
| January | 63.8° | 45.7° | 54.8° | 4.80" |
| February | 67.4° | 49.8° | 58.6° | 3.02" |
| March | 73.0° | 55.6° | 64.3° | 3.30" |
| April | 78.4° | 61.3° | 69.8° | 4.22" |
| May | 85.0° | 69.1° | 77.0° | 5.12" |
| June | 90.0° | 74.7° | 82.4° | 6.54" |
| July | 91.8° | 76.0° | 83.9° | 4.36" |
| August | 92.3° | 75.9° | 84.1° | 6.64" |
| September | 88.4° | 71.8° | 80.1° | 7.34" |
| October | 81.7° | 62.6° | 72.1° | 5.79" |
| November | 72.5° | 53.4° | 62.9° | 4.54" |
| December | 65.8° | 47.4° | 56.6° | 4.53" |
Annual Temperature History
2010–2025, completed calendar years only.
NOAA station HOUSTON NWSO, TX US (ID: USC00414333) • 8.6 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 | 68.5 | 77.6 | 59.4 |
| 2011 | 70.6 | 80.8 | 60.4 |
| 2012 | 71.6 | 81.1 | 62.1 |
| 2013 | 69.0 | 78.1 | 59.8 |
| 2014 | 68.4 | 77.3 | 59.5 |
| 2015 | 70.2 | 78.1 | 62.4 |
| 2016 | 71.6 | 79.2 | 64.0 |
| 2017 | 72.1 | 80.6 | 63.6 |
| 2018 | 70.9 | 79.1 | 62.6 |
| 2019 | 71.2 | 79.4 | 63.0 |
| 2020 | 72.3 | 80.5 | 64.1 |
| 2021 | Unavailable | 79.4 | Unavailable |
| 2022 | 70.3 | 79.3 | 61.3 |
| 2023 | 72.3 | 80.9 | 63.6 |
| 2024 | Unavailable | Unavailable | Unavailable |
| 2025 | 71.7 | 80.2 | 63.1 |
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.