Annual mean
Annual mean of daily highs
Annual mean of daily lows
Forsyth city, Montana
Official LSAD Designation: Forsyth city • Census GEOID: 3027700
• Rosebud County
Climate Normals & Weather Observations
30-year climate normals (1991–2020) and weather observations for Forsyth city.
Reference Weather Station: FORSYTH, MT US (ID: USC00243098)
• Located 0.3 miles from community center
• Elevation: 766.6 m
| Month | Average High (°F) | Average Low (°F) | Mean Temp (°F) | Precipitation (in) |
|---|---|---|---|---|
| January | 33.7° | 10.2° | 21.9° | 0.61" |
| February | 38.0° | 13.5° | 25.7° | 0.58" |
| March | 49.3° | 23.3° | 36.3° | 0.94" |
| April | 59.2° | 32.9° | 46.1° | 1.85" |
| May | 68.8° | 42.8° | 55.8° | 2.92" |
| June | 78.5° | 52.0° | 65.2° | 2.54" |
| July | 88.0° | 58.2° | 73.1° | 1.38" |
| August | 86.5° | 55.8° | 71.1° | 1.19" |
| September | 75.4° | 45.6° | 60.5° | 1.38" |
| October | 60.0° | 33.7° | 46.8° | 1.37" |
| November | 46.1° | 21.7° | 33.9° | 0.66" |
| December | 35.4° | 12.6° | 24.0° | 0.58" |
Annual Temperature History
2010–2025, completed calendar years only.
NOAA station FORSYTH, MT US (ID: USC00243098) • 0.3 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 | 45.0 | 57.7 | 32.3 |
| 2011 | 45.7 | 58.6 | 32.9 |
| 2012 | 49.3 | 63.2 | 35.4 |
| 2013 | 46.6 | 59.1 | 34.1 |
| 2014 | 45.4 | 58.2 | 32.6 |
| 2015 | 48.8 | 62.7 | 34.9 |
| 2016 | 49.4 | 62.9 | 35.9 |
| 2017 | 47.5 | 60.7 | 34.2 |
| 2018 | 44.1 | 56.8 | 31.4 |
| 2019 | 43.8 | 55.9 | 31.7 |
| 2020 | 47.7 | 61.4 | 34.1 |
| 2021 | 47.9 | 61.8 | 34.1 |
| 2022 | 45.8 | 58.8 | 32.7 |
| 2023 | 48.5 | 61.0 | 35.9 |
| 2024 | 48.3 | 61.6 | 35.0 |
| 2025 | 47.8 | 60.9 | 34.6 |
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.