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Monthly Water Resource Summary

November 2025

Precipitation

November 2025 Indiana’s average precipitation was below normal, with the average temperature near normal. The statewide monthly precipitation average was 66.8 percent of normal. The overall monthly temperature average for Indiana was 42.5 degrees Fahrenheit or 0.1 degrees below normal.

All nine of the climate divisions received much below normal or below normal precipitation for November (see Percent of Normal Precipitation Table). Climate Division 1 (NW) received the highest (84.6) percentage of normal precipitation for the month, while Climate Division 6 (EC) received the lowest (58.8) percentage.

Precipitation for the year to date (2025) ranges from 80.4% to 119.9% through November. Precipitation for the Water Year 2025, beginning October 1, 2025, ranges from 57.6% to 109.1% through November. Over the 2-year period (from December 2023-November 2025), all of the nine climate divisions have received near normal precipitation ranging from 88.8% for Climate Division 3 (NE) to 110.9% for Climate Division 8 (SC).

The 12-month SPI indices show Climate Division 8 (SC) in the “very wet” category, climate divisions 7 (SW) and 9 (SE) and in the “moderately wet” category, and the remaining climate divisions in the “near normal” category. The 6-month SPI indices show Climate Division 3 (SC) in the “moderately dry” category and the remaining climate divisions in the “near normal” category.  The 3-month SPI indices show climate divisions 3 (NE) and 4

(WC) in the “moderately dry” category, and the remaining climate divisions in the “near normal” category. The 1-month SPI indices show all climate divisions in the “near normal” category.

Table of recent precipitation compared to normal for each climatic division of the state.

Standardized Precipitation Index (SPI) drought maps for the state for current month.

Explanation of Standard Precipitation Index (SPI)

U. S. Drought Monitor

For December 2, 2025, the U.S. Drought Monitor shows parts of northeast Indiana are experiencing “Severe Drought” to “Extreme Drought” conditions. Most of the rest of the north half of the state is experiencing either “abnormally dry” or “moderate drought” conditions. The southern half and northwest counties are indicating no drought conditions. The U.S. Seasonal Drought Outlook predicts the current drought conditions to end or improve for the whole state by the end of February 2026.

Streamflow

In November 2025, all twelve streams included in drought reporting since 1999 had below normal to much below stream flow. St. Marys River at Decatur had the lowest mean monthly flow at 9%, and the Kankakee River at Shelby had the highest mean monthly flow at 84%.

Detailed Information on Streamflow

Lake Michigan

On November 28, 2025, the Lake Michigan-Huron forecasted water level was 5 inches below the measurement taken on October 28, 2025, and 9 inches below the measurement taken on November 28, 2024. On November 30, 2025, the Michigan-Huron level was 577.62 feet, which is 17 inches above the lowest recorded monthly mean level for November set in 1964. A comparison of November monthly mean water levels to the long-term (1918-present) average shows Lakes Michigan-Huron water levels were about 13 inches below the average. All Lake Michigan-Huron data are referenced to the International Great Lakes Datum 1985.

The Lake Michigan-Huron water level is forecast by the U.S. Army Corps of Engineers to decrease 1 inch over the next month.

Reservoirs

On November 29, 2025, the water levels for five of the eight reservoirs monitored by the U.S. Army Corps of Engineers were above the normal pool elevation. The deviation from normal pool ranged from +4.80 feet (Salamonie) to -1.0 feet (CM Harden).

All three reservoirs monitored by Citizens Water (Morse, Geist, and Eagle Creek) were below their respective normal pool elevations as of December 1, 2025. The deviation from normal pool ranged from -2.44 feet (Eagle Creek) to -0.04 (Geist).

Groundwater Levels

As of November 30, 2025, new water level data is available for all nine wells currently monitored. Of the nine wells, data indicates that water levels are below to well below normal for Laporte 9, Fulton 7, LaGrange 2, Vigo 7, Morgan 4, Posey 3, Randolph 3, and Clark 20. Harrison 8 is above normal.

Real-time data is available for all of the wells and may be accessed on the U.S. Geological website.

Acknowledgments

This report has been compiled from Division of Water data and from information supplied by the following:

Precipitation data:
National Oceanic and Atmospheric Administration, National Weather Service, Midwestern Regional Climate Center

Standardized Precipitation Index (SPI):
National Drought Mitigation Center (NDMC) and Western Regional Climate Center (WRCC)

Streamflow:
U.S. Geological Survey and State of Indiana cooperative program

Lake Michigan level data:
U.S. Army Corps of Engineers, Detroit District

Reservoir data:
U.S. Army Corps of Engineers, Louisville District

Groundwater level data:
U.S. Geological Survey and State of Indiana cooperative program

Temperature data:
Midwestern Regional Climate Center and Indiana State Climate Office, Purdue University