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Precipitation Records for 2011 - By the Numbers



2011 Precipitation Data and Statistics

Interested in knowing how many days of 2011 experienced precipitation or what the precipitation total was for a given month? The following links break down the 2011 precipitation totals by day, month, and year for NWS Wilmington's three official climate stations. In the PDF files below, a "T" denotes a trace of precipitation (less than 0.01 inches), while "measurable" refers to 0.01 inches or more of precipitation. Thus, "Number of Days with Measurable Precipitation" excludes any days with only a trace, while "Number of Days with Any Precipitation" is inclusive of days with only a trace. Note that this data is preliminary.

Cincinnati 2011 Precipitation Data
Columbus 2011 Precipitation Data
Dayton 2011 Precipitation Data

Official Climate Sites

Here is a chart of the top 5 highest annual precipitation records at the three official climate stations kept by the National Weather Service in Wilmington, Ohio.

Top 5 Wettest Years on Record (Through December 31st)
CincinnatiDaytonColumbus
1. 73.28 / 20111. 59.75 / 19901. 54.96 / 2011
2. 57.58 / 19902. 56.72 / 20112. 53.16 / 1990
3. 54.67 / 18803. 54.65 / 19963. 51.30 / 1882
4. 53.41 / 19964. 52.23 / 19934. 50.73 / 1890
5. 53.22 / 19505. 51.26 / 19955. 49.17 / 1979


Ohio Annual Precipitation Record Broken

2011 brought abnormally high precipitation to the state of Ohio (particularly the southwestern portion), and several observing sites unofficially surpassed the state record for the highest annual precipitation total in Ohio. The old record was 70.82 inches, which was set in 1870 at Little Mountain, OH on the Geauga/Lake County line. The following table lists observing sites in NWS Wilmington's forecast area that surpassed the old record. All three locations were cooperative observer stations in the Cincinnati metro area.

SiteTypeCounty2011 Total
CheviotCOOPHamilton76.32
MiamitownCOOPHamilton74.94
FernbankCOOPHamilton74.09
Old Record SiteYearCountyTotal
Little Mountain1870Lake/Geauga70.82

Pending final official certification, a team of climate experts has validated and accepted the 76.32 inches of precipitation that fell during 2011 at Cheviot, OH as the new Ohio state record for annual precipitation.

Climate representatives from the National Weather Service offices in Wilmington and Cleveland, the National Weather Service Eastern Region Headquarters, the Midwest Regional Climate Center, the National Climatic Data Center, and the State Climatology Office of Ohio agreed that the Cheviot data was both reliable and accurate and was supported by surrounding observations.

Cooperative Observing Stations

Here is a list of cooperative observing stations in the area whose 2011 annual precipitation amounts ranked among their top 3 wettest years on record. The second column ("POR") is the period of record, with the year listed being the first year the precipitation data was collected. The last column ("THRU") is the date through which precipitation data was collected in 2011.




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Wilmington Ohio Weather Forecast Office
1901 South State Route 134
Wilmington, OH 45177
Tel: (937) 383-0031
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Page last modified: January 17, 2012.
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