Annual mean
Annual mean of daily highs
Annual mean of daily lows
Le Mars city, Iowa
Official LSAD Designation: Le Mars city • Census GEOID: 1944400
• Plymouth County
Climate Normals & Weather Observations
30-year climate normals (1991–2020) and weather observations for Le Mars city.
Reference Weather Station: LE MARS, IA US (ID: USC00134735)
• Located 1.4 miles from community center
• Elevation: 364.2 m
| Month | Average High (°F) | Average Low (°F) | Mean Temp (°F) | Precipitation (in) |
|---|---|---|---|---|
| January | 27.2° | 7.4° | 17.3° | 0.72" |
| February | 32.2° | 11.4° | 21.8° | 0.87" |
| March | 45.9° | 23.1° | 34.5° | 1.85" |
| April | 59.9° | 34.2° | 47.0° | 3.07" |
| May | 71.7° | 47.0° | 59.3° | 3.90" |
| June | 81.3° | 58.3° | 69.8° | 4.64" |
| July | 84.5° | 61.7° | 73.1° | 3.11" |
| August | 82.0° | 59.0° | 70.5° | 3.95" |
| September | 75.8° | 49.6° | 62.7° | 3.14" |
| October | 62.5° | 36.9° | 49.7° | 2.40" |
| November | 45.7° | 23.5° | 34.6° | 1.30" |
| December | 32.0° | 12.9° | 22.4° | 1.04" |
Annual Temperature History
2010–2025, completed calendar years only.
NOAA station LE MARS, IA US (ID: USC00134735) • 1.4 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 | 46.8 | 57.6 | 35.9 |
| 2011 | 47.1 | 58.4 | 35.8 |
| 2012 | 51.4 | 64.0 | 38.9 |
| 2013 | 45.7 | 56.5 | 35.0 |
| 2014 | 45.3 | 56.5 | 34.1 |
| 2015 | 48.8 | 60.0 | 37.7 |
| 2016 | 49.4 | 60.5 | 38.3 |
| 2017 | 48.6 | 60.1 | 37.1 |
| 2018 | 45.8 | 56.1 | 35.5 |
| 2019 | 45.2 | 55.9 | 34.4 |
| 2020 | 48.5 | 59.9 | 37.1 |
| 2021 | 49.6 | 60.9 | 38.3 |
| 2022 | 47.2 | 59.9 | 34.4 |
| 2023 | 49.4 | 60.1 | 38.6 |
| 2024 | 50.0 | 61.2 | 38.9 |
| 2025 | 48.9 | 60.3 | 37.5 |
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.