Annual mean
Annual mean of daily highs
Annual mean of daily lows
Rock Island city, Washington
Official LSAD Designation: Rock Island city • Census GEOID: 5359180
• Douglas County
Climate Normals & Weather Observations
30-year climate normals (1991–2020) and weather observations for Rock Island city.
Reference Weather Station: WENATCHEE PANGBORN AP, WA US (ID: USW00094239)
• Located 3.3 miles from community center
• Elevation: 374.6 m
| Month | Average High (°F) | Average Low (°F) | Mean Temp (°F) | Precipitation (in) |
|---|---|---|---|---|
| January | 33.6° | 24.1° | 28.9° | 1.02" |
| February | 41.6° | 27.4° | 34.5° | 0.76" |
| March | 52.5° | 33.7° | 43.1° | 0.73" |
| April | 61.8° | 40.4° | 51.1° | 0.57" |
| May | 71.6° | 48.7° | 60.1° | 0.77" |
| June | 78.2° | 54.9° | 66.5° | 0.50" |
| July | 87.6° | 61.8° | 74.7° | 0.24" |
| August | 86.4° | 61.0° | 73.7° | 0.23" |
| September | 76.7° | 52.5° | 64.6° | 0.23" |
| October | 60.5° | 40.9° | 50.7° | 0.62" |
| November | 43.8° | 30.9° | 37.4° | 0.85" |
| December | 33.4° | 24.5° | 29.0° | 1.31" |
Annual Temperature History
2010–2025, completed calendar years only.
NOAA station WENATCHEE PANGBORN AP, WA US (ID: USW00094239) • 3.3 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 | 50.8 | 59.9 | 41.7 |
| 2011 | 49.7 | 59.5 | 40.0 |
| 2012 | 51.9 | 61.5 | 42.3 |
| 2013 | 51.7 | 61.4 | 41.9 |
| 2014 | 54.0 | 63.5 | 44.4 |
| 2015 | 56.0 | 65.8 | 46.2 |
| 2016 | 53.2 | 62.7 | 43.7 |
| 2017 | 49.9 | 59.2 | 40.6 |
| 2018 | 52.3 | 62.0 | 42.7 |
| 2019 | 49.7 | 58.5 | 40.9 |
| 2020 | 52.4 | 62.2 | 42.7 |
| 2021 | 52.8 | 62.7 | 42.9 |
| 2022 | 49.9 | 59.2 | 40.6 |
| 2023 | 52.4 | 61.3 | 43.4 |
| 2024 | 53.0 | 62.1 | 43.8 |
| 2025 | 54.0 | 63.3 | 44.7 |
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.