October kicks off the start of the 'water year' for the Southwest-but why?

AccuWeather 2025-10-07

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The 12-month period used to measure precipitation totals in the southwestern U.S. runs from Oct. 1 to Sept. 30 of the following year, and there's a very good reason.

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Geoff Cornish on Tropical Depression 6

Wildfires ravage a drought-stricken Southwest

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Wildfires ravage a drought-stricken Southwest

October kicks off the start of the 'water year' for the Southwest-but why?

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Geoff Cornish on Tropical Depression 6

Wildfires ravage a drought-stricken Southwest