Climate and Weather Resources
Historical climate data for Idaho
- Access historical climate data from land-based weather stations in Idaho through the National Oceanic and Atmospheric Administration’s (NCEI).
- Climate Normals (30-year averages of temperature and precipitation) calculated by .
Drought
- The (USDM) provides maps of current drought conditions, forecasts and other drought information for Idaho and the U.S. Idaho Climate Service partners with Idaho agencies to assess evolving drought conditions and demarcate drought severity boundaries for the USDM maps.
Mountain snow
- Most of the water found in Idaho’s rivers, streams, lakes and even groundwater originates as winter snowpack in the mountains. Spring and summer snowmelt delivers runoff to rivers where it provides recreation, irrigation, environmental flows, municipal and industrial supplies, and a myriad of other uses.
- Maps of real-time mountain snow observations from the operated by the USDA’s Natural Resource Conservation Service.
Streamflow and water supply
- Access data from the U.S. Bureau of Reclamation’s network of Hydrologic and Meteorologic monitoring stations throughout the Pacific Northwest.
- Access data for Idaho.
Evaporation
- Evaporation affects the amount of irrigation water needed to grow crops. The U.S. Bureau of Reclamation’s network collects weather data and calculates evaporation at a network of stations across Idaho and the western U.S.
Current Weather
Map of current weather observations across Idaho from the National Weather Service.
Weather Alerts
* WHAT...Southwest winds 25 to 35 mph with gusts up to 50 mph expected. * WHERE...Portions of southwest Idaho and southeast Oregon. * WHEN...From noon MDT /11 AM PDT/ Sunday to midnight MDT /11 PM PDT/ Sunday Night. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Blowing dust could reduce visibilities.
* WHAT...Southwest winds around 20 mph with gusts up to 30 mph expected for American Falls Reservoir. * WHERE...Lower Snake River Plain. * WHEN...From 2 PM this afternoon to 8 PM MDT this evening. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. * ADDITIONAL DETAILS...Strong winds are expected again on Sunday.
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