Wisconsin State Climatology Office
 John Young, Director & Professor Emeritus
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This page focuses on the recent weather and climate for Wisconsin on time scales that range from the last seven days to the last 12 months. 

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Last 24 Hours

Last 7 Days

Last 30 Days

Last 90 Days

Monthly Maps

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Volunteer Precipitation Observations
 (CoCoRaHS) for Wisconsin


State Bulletin

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Dr. John Young, Director & Dr. Edward Hopkins, Climatologist


HISTORIC RAINS & FLOODING IN SOUTHERN WISCONSIN TRENDING IN 2018

Southern Wisconsin experienced several extreme rain events in August 2018, extending a trend attributed to increased humidity and altered wind patterns associated with climate change.

August 17-27 Episode {https://www.weather.gov/mkx/August2018SevereandFlood}

The upper map shows the totals from several events of Episode 1, concentrated in the central and eastern portions of southern Wisconsin.

The lower map shows the most extreme event:

(1) Days August 20-21 Historic rainfall fell over Western Dane County, including the western part of metropolitan Madison, over 6 hours on the 20th. It far exceeded "100-year" amounts, and in some locations possibly set a new state record of nearly a foot of rain in 24 hours! The runoff led to destructive flooding in both rural and wide city areas. The large Lake Mendota and smaller lakes downstream reached record levels which will take weeks to resolve.

(2) Days August 26-27 Flooding rains in Washington and Ozaukee counties fell, with 24 hour amounts in some locations exceeding "100-year" return levels.

August 27-29 Episode {https://www.weather.gov/images/mkx/events/2018/aug2818/sundaythroughearlywed.png}

(1) Days 27-28 { https://www.weather.gov/arx/aug2818}

Significant to record flooding occurred across southwestern Wisconsin. Hardest hit areas included parts of La Crosse, Monroe, and Vernon counties. Anywhere from 5 to 12 inches of rain fell overnight, amounts exceeding previous "100-year" values. Record-breaking flooding occurred along the entire length of the Kickapoo River.

(2) Day 28 {https://www.weather.gov/mkx/aug2818}

Afternoon/evening storms rolled across central and eastern counties, with sixteen small damaging tornadoes and heavy rains. (Note: The Milwaukee/Sullivan Office of the National Weather Service confirmed fifteen tornadoes and the Green Bay Office reported one additional tornado.)


Wisconsin Climate Services Summit Meeting Held 6-7 June 2018

A first-time Wisconsin meeting of State, Federal, University, & Tribal providers and users. An information & networking opportunity for 49 invited representatives from 21 organizations:

Five State of Wisconsin Governmental Departments:
Natural Resources Agriculture, Trade, & Consumer Protection
Health Services Emergency Management Administration

Six Federal Agencies:
National Weather Service National Oceanic & Atmospheric Administration
U.S. Department of Agriculture U.S. Environmental Protection Agency
U.S. Geological Survey National Park Service

Three University of Wisconsin-Madison Groups:
State Climatology Office U.W. Extension Applied Climate Researchers

Three Tribal Groups
Lac du Flambeau Menominee Oneida

Two Regional Planning, Energy, Climate Representatives

Two Conservation Groups

Meeting Objectives
  • Identify climate services needs or gaps within the state
  • Build increased awareness of existing climate tools, data, individuals and expertise
  • Identify opportunities to seek out additional resources
  • Enable climate service providers to better coordinate and collaborate

Held at Pyle Center on Lake Mendota at University of Wisconsin-Madison
Local Co-Host: SCO Director Prof. John A. Young jayoung@wisc.edu
Local Co-Organizer: Rebecca Power, U.W. Extension, North Central Region Water Network


Maps of 2018 temperature and precipitation data along with their departures from normal are available below.

Weather computer models and the seasonal forecasts of the NOAA Climate Prediction Center are available.

Last 24 Hours - Courtesy of NWS Sullivan (updated by 8:00 am Central Time)

Last 7 Days (Statewide Maps) - updated by 10:30am Central Time

Precipitation (inches)Mean
Temperature (F)
Low Temperature (F)High Temperature (F)
Precipitation Departure (inches)Mean Temperature Departure (F)Low Temperature Departure (F)High Temperature Departure (F)
Precipitation Percent of Average   

Last 30 Days (Statewide Maps) - updated by 10:30am Central Time

Precipitation (inches)Mean
Temperature (F)
Low Temperature (F)High Temperature (F)
Precipitation Departure (inches)Mean Temperature Departure (F)Low Temperature Departure (F)High Temperature Departure (F)
Precipitation Percent of Average   

Last 90 Days (Statewide Maps) - updated by 10:30am Central Time

Precipitation (inches)Mean
Temperature (F)
Low Temperature (F)High Temperature (F)
Precipitation Departure (inches)Mean Temperature Departure (F)Low Temperature Departure (F)High Temperature Departure (F)
Precipitation Percent of Average   

Recent precipitation data from NOAA NWS

  • High-resolution Precipitation Maps from NOAA
    Multi-sensor Precipitation Estimates (from NWS Radar Observations
    and rain gauge data) for:

Monthly 2018 Statewide Maps -
Courtesy of Midwestern Regional Climate Center

  • Precipitation (inches) - and departures from 1981-2010 Normals

    MonthJanFebMarAprMayJunJulAugSepOctNovDec Ann
    ActualAAAAAA A A A A A A A
    DepartureDDDDDD D D D D D D D
    % of normal P P P P P P P P P P P P P

  • Mean Temperature (F) - and departures from 1981-2010 Normals

    MonthJanFebMarAprMayJunJulAugSepOctNovDec Ann
    ActualAAAAAA A A A A A A A
    DepartureDDDDDD D D D D D D D

  • Snowfall (inches) - and departures from 1981-2010 Normals

    MonthJanFebMarAprMayJunJulAugSepOctNovDec
    ActualAAAAAA AAAA A A
    DepartureDDDDDD DDDD D D
    % of normal P PPPP P P P P P P P

  •  See archive of statewide monthly precipitation, temperature and snowfall maps for previous years (2001-2017)

Last 12 Months Averages

The data for these products come from the U.S. Cooperative Network, augmented by observations from NWS and FAA sites. These cooperative sites are operated by volunteer observers using approved instruments and observing techniques. Their efforts that provide sufficient data to generate these products are greatly appreciated.

  • Divisional Monthly Averages for Last 12 Months
    • Temperature (and departure from 1981-2010 normals)
      Division NW  NC  NE  WC  C  EC  SW  SC  SE 
      ActualAAAA AAAAA
      DepartureDDDD DDDDD
    • Precipitation (and departure from 1981-2010 normals)
      Division NW  NC  NE  WC  C  EC  SW  SC  SE 
      ActualAAAA AAAAA
      DepartureDDDD DDDDD
  •  
  • See archive of statewide-averaged data  for previous years (2001-2016)

     

Wisconsin Drought Issues

  • See the section in our Water Systems page for current information on Wisconsin soil moisture and potential drought conditions.

Midwest to Global

Tables, maps, other graphics and narratives describing the climate of the Midwest, the United States and the globe over the last week to one year are available.

Record Global Temperatures in 2015- Report from NOAA

Forecasts & Outlooks