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Lost River city, Idaho

Official LSAD Designation: Lost River city • Census GEOID: 1647890 • Custer County

Climate Normals & Weather Observations

30-year climate normals (1991–2020) and weather observations for Lost River city.

Reference Weather Station: MACKAY LOST RVR RS, ID US (ID: USC00105462) • Located 15.9 miles from community center • Elevation: 1,797.4 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 29.6° 8.4° 19.0° 0.75"
February 34.4° 12.2° 23.3° 0.51"
March 43.9° 21.8° 32.9° 0.72"
April 54.5° 29.0° 41.8° 0.88"
May 64.6° 37.0° 50.8° 1.23"
June 72.7° 43.3° 58.0° 1.45"
July 83.3° 49.8° 66.6° 0.65"
August 81.5° 47.9° 64.7° 0.68"
September 72.1° 40.4° 56.3° 0.77"
October 57.8° 30.7° 44.2° 0.84"
November 41.1° 19.3° 30.2° 0.53"
December 29.0° 9.5° 19.2° 0.87"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station MACKAY LOST RVR RS, ID US (ID: USC00105462) • 15.9 miles from community center .

This is the same reference station used for monthly normals.

Annual mean Annual mean of daily highs Annual mean of daily lows
Annual temperature history at MACKAY LOST RVR RS, ID US Year is the horizontal axis. Annual mean temperature in degrees Fahrenheit is the vertical axis. Dots show recorded years; lines connect consecutive available years only. Missing years are gaps, with no interpolation. Optional dashed lines show annual mean of daily highs and lows. Exact values appear in the data table below. 23.0 33.3 43.5 53.8 64.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2010: Annual mean 40.4°F 2011: Annual mean 39.6°F 2012: Annual mean 43.9°F 2013: Annual mean 42.2°F 2014: Annual mean 44.3°F 2017: Annual mean 42.9°F 2019: Annual mean 40.4°F 2023: Annual mean 43.5°F 2024: Annual mean 47.7°F 2010: Annual mean of daily highs 52.7°F 2011: Annual mean of daily highs 52.1°F 2012: Annual mean of daily highs 56.8°F 2013: Annual mean of daily highs 55.2°F 2014: Annual mean of daily highs 57.4°F 2017: Annual mean of daily highs 55.1°F 2019: Annual mean of daily highs 53.0°F 2023: Annual mean of daily highs 55.8°F 2024: Annual mean of daily highs 60.6°F 2010: Annual mean of daily lows 28.1°F 2011: Annual mean of daily lows 27.2°F 2012: Annual mean of daily lows 30.9°F 2013: Annual mean of daily lows 29.1°F 2014: Annual mean of daily lows 31.2°F 2017: Annual mean of daily lows 30.7°F 2019: Annual mean of daily lows 27.8°F 2023: Annual mean of daily lows 31.2°F 2024: Annual mean of daily lows 34.8°F

Source: NOAA NCEI Global Summary of the Year.

Annual temperature data table (°F)
Annual station temperatures, 2010–2025. Unavailable means no reported value.
Year Annual mean (°F) Annual mean of daily highs (°F) Annual mean of daily lows (°F)
2010 40.4 52.7 28.1
2011 39.6 52.1 27.2
2012 43.9 56.8 30.9
2013 42.2 55.2 29.1
2014 44.3 57.4 31.2
2015 Unavailable Unavailable Unavailable
2016 Unavailable Unavailable Unavailable
2017 42.9 55.1 30.7
2018 Unavailable Unavailable Unavailable
2019 40.4 53.0 27.8
2020 Unavailable Unavailable Unavailable
2021 Unavailable Unavailable Unavailable
2022 Unavailable Unavailable Unavailable
2023 43.5 55.8 31.2
2024 47.7 60.6 34.8
2025 Unavailable Unavailable Unavailable
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.