Idaho

As of the 13 October 2026 U.S. Drought Monitor map, 65.8% of Idaho was in drought (D1 or worse), with 25.4% in extreme or exceptional drought (D3–D4). The 20 reservoirs we track in Idaho were 22.7% full on their latest readings. 14 of 20 tracked reservoir sites sit inside the drought area, 8 of them in severe drought (D2) or worse.

The Drought Monitor maps where conditions are dry this week — rainfall, soil moisture, streamflow — not how much water is stored. Reservoir storage lags it by months, so a region can be in drought with full reservoirs, or out of drought with empty ones. Source: droughtmonitor.unl.edu. The U.S. Drought Monitor is jointly produced by the National Drought Mitigation Center at the University of Nebraska-Lincoln, the United States Department of Agriculture, the National Oceanic and Atmospheric Administration and the National Aeronautics and Space Administration. Map courtesy of NDMC.