Heavy Rain in Mono County, California

Heavy Rain in Mono County, California: 69 recorded events between 1997 and 2025. The strongest on record measured 0. That places the county #50 nationally and #8 statewide for this hazard.

Reporting practice changed over time — early decades are undercounted, not calmer.

The busiest decade for heavy rain in Mono County is the 2010s, when 36 of the county's 69 recorded events were logged. Comparing decades is useful for spotting active periods, but the earliest years are thin because systematic reporting for this hazard began later.

Within the Mono County archive, heavy rain makes up 51.1% of all recorded severe weather across 8 hazard types. Nationally the county sits at #50 for this hazard and #8 within California, putting it in the 97.8 percentile of all U.S. counties.

Aug is the peak month for heavy rain in Mono County with 16 recorded events, while Jun is the quietest. Seasonality here is a property of the archive as much as the climate: reports cluster where population and spotter networks are densest.

Written by National Weather Service staff at the time of the event · public domain

How many heavy rain events are on record in Mono County, California?

69 heavy rain events are recorded in Mono County between 1997 and 2025, causing 0 direct deaths.

What is the strongest heavy rain recorded in Mono County?

The strongest heavy rain on record in Mono County measured 0.

Where does the heavy rain data for Mono County come from?

All events come from the NOAA/NCEI Storm Events Database, the federal public-domain archive of severe weather reports. Dates are UTC, damage is as reported and not inflation-adjusted, and the most recent entries may still be revised.