Annual mean
Annual mean of daily highs
Annual mean of daily lows
Lake Koshkonong CDP, Wisconsin
Official LSAD Designation: Lake Koshkonong CDP • Census GEOID: 5541583
• Jefferson County
Climate Normals & Weather Observations
30-year climate normals (1991–2020) and weather observations for Lake Koshkonong CDP.
Reference Weather Station: FT ATKINSON, WI US (ID: USC00472869)
• Located 5.1 miles from community center
• Elevation: 243.8 m
| Month | Average High (°F) | Average Low (°F) | Mean Temp (°F) | Precipitation (in) |
|---|---|---|---|---|
| January | 27.7° | 10.7° | 19.2° | 1.51" |
| February | 31.6° | 13.8° | 22.7° | 1.43" |
| March | 43.6° | 24.7° | 34.1° | 1.96" |
| April | 56.9° | 36.2° | 46.6° | 3.56" |
| May | 69.1° | 47.5° | 58.3° | 4.13" |
| June | 79.0° | 57.7° | 68.3° | 4.98" |
| July | 82.5° | 61.7° | 72.1° | 4.03" |
| August | 80.6° | 59.6° | 70.1° | 3.86" |
| September | 74.0° | 51.2° | 62.6° | 3.33" |
| October | 60.9° | 39.7° | 50.3° | 2.84" |
| November | 45.7° | 28.6° | 37.2° | 2.20" |
| December | 33.2° | 17.9° | 25.5° | 1.71" |
Annual Temperature History
2010–2025, completed calendar years only.
NOAA station FT ATKINSON, WI US (ID: USC00472869) • 5.1 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 | 48.6 | 58.5 | 38.6 |
| 2011 | 47.5 | 57.2 | 37.8 |
| 2012 | 50.8 | 61.4 | 40.2 |
| 2013 | 45.4 | 55.4 | 35.4 |
| 2014 | 43.8 | 53.8 | 33.8 |
| 2015 | 47.6 | 57.8 | 37.4 |
| 2016 | 49.5 | 58.9 | 40.0 |
| 2017 | 48.7 | 58.5 | 38.8 |
| 2018 | 46.8 | 56.1 | 37.5 |
| 2019 | 46.1 | 55.5 | 36.8 |
| 2020 | 48.5 | 58.1 | 38.9 |
| 2021 | 49.0 | 59.4 | 38.7 |
| 2022 | 46.6 | 56.6 | 36.6 |
| 2023 | 50.0 | 59.7 | 40.2 |
| 2024 | 50.9 | 60.8 | 41.0 |
| 2025 | 47.9 | 58.4 | 37.5 |
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.