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State

Montana , December 2025

Montana drought conditions normal-to-mild; 1 flood/storm declaration(s) in period.

Severe drought (D2+)

0%

Monthly precip

2.64 in

Anomaly vs normal

finalizing

PHDI

-1.79

Drought coverage (% of land area)

noneD0 dryD1 moderateD2 severeD3 extremeD4 exceptional

Precipitation detail

Observed
2.64 in
30-yr normal
pending NOAA finalization
Anomaly
pending NOAA finalization
PDSI
-1.79
PHDI
-1.79

FEMA disaster declarations in period (1)

  • DR-3630 · MT2025-12-19 · Flood

    SEVERE STORMS AND FLOODING (3 counties)

Methodology + sources
  • Drought: U.S. Drought Monitor (UNL/NIDIS), end-of-month snapshot. Categories range from D0 (abnormally dry) to D4 (exceptional drought). d2_plus is the cumulative severe-or-worse coverage.
  • Precipitation: NOAA NCEI Climate at a Glance, monthly state totals, normal = 1991-2020 baseline. SPI is the Standardized Precipitation Index.
  • Disasters: FEMA OpenFEMA DisasterDeclarationsSummaries, filtered to flood/storm/hurricane/drought incident types.

Covers 1 state: MT