Annual mean
Annual mean of daily highs
Annual mean of daily lows
Ortley town, South Dakota
Official LSAD Designation: Ortley town • Census GEOID: 4647660
• Roberts County
Climate Normals & Weather Observations
30-year climate normals (1991–2020) and weather observations for Ortley town.
Reference Weather Station: SUMMIT 1 W, SD US (ID: USC00398116)
• Located 7.3 miles from community center
• Elevation: 595.9 m
| Month | Average High (°F) | Average Low (°F) | Mean Temp (°F) | Precipitation (in) |
|---|---|---|---|---|
| January | 20.7° | 2.1° | 11.4° | 0.65" |
| February | 25.7° | 6.1° | 15.9° | 0.69" |
| March | 38.7° | 18.4° | 28.5° | 1.03" |
| April | 54.6° | 30.3° | 42.5° | 2.34" |
| May | 68.2° | 42.8° | 55.5° | 3.16" |
| June | 77.1° | 53.5° | 65.3° | 3.95" |
| July | 81.9° | 58.1° | 70.0° | 4.07" |
| August | 80.4° | 56.3° | 68.3° | 2.97" |
| September | 73.0° | 47.9° | 60.5° | 2.77" |
| October | 57.5° | 34.4° | 45.9° | 2.51" |
| November | 39.8° | 20.7° | 30.3° | 0.90" |
| December | 25.7° | 8.6° | 17.2° | 0.66" |
Annual Temperature History
2010–2025, completed calendar years only.
NOAA station SUMMIT 1 W, SD US (ID: USC00398116) • 7.3 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 | 43.4 | 53.6 | 33.2 |
| 2011 | 42.5 | 53.1 | 31.9 |
| 2012 | 47.0 | 59.1 | 35.0 |
| 2013 | 40.2 | 50.5 | 29.9 |
| 2014 | 40.7 | 51.7 | 29.8 |
| 2015 | 44.9 | 56.0 | 33.7 |
| 2016 | 45.2 | 56.0 | 34.3 |
| 2017 | 43.4 | 54.3 | 32.5 |
| 2018 | 41.1 | 51.2 | 31.0 |
| 2019 | 39.6 | 49.1 | 30.1 |
| 2020 | 43.9 | 55.0 | 32.8 |
| 2021 | 45.6 | 56.8 | 34.4 |
| 2022 | 41.7 | 52.6 | 30.8 |
| 2023 | 44.2 | 55.0 | 33.4 |
| 2024 | 45.5 | 56.2 | 34.9 |
| 2025 | 42.8 | 54.0 | 31.6 |
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.