Wisconsin Summer Climate
(June, July, and August)

News/Events/Other

• Be aware of summertime hazards:
  • Heat waves can be deadly even in Wisconsin, claiming more lives during the last two decades than any other weather-related event. Wisconsin Heat Awareness Day was observed on Thursday, 14 June 2007.
  • Wisconsin, along with the rest of the nation, observes Lightning Awareness Week from 24 to 30 June 2007.
  • Since Wisconsin borders on two of the Great Lakes, rip currents can pose a hazard to swimmers. The National Weather Service Offices in the Great Lakes States have joined with those along the Atlantic, Gulf and Pacific coasts in issuing rip current threat information when appropriate. The Milwaukee-Sullivan Forecast Office participated in the observance of the national Rip Current Awareness Week (3-9 June 2007).


• Many related graphs and links may be found below and on the Climate Watch and Water Systems pages.

Temperature

• Map of Mean Summer Temperatures (1971-2000 normals)


• Long-term Variation in Average Spring Temperatures Statewide and:
  

  Northwest	North Central	Northeast
  West Central	Central	East Central
  Southwest	South Central	Southeast



• Graph of Wisconsin's Top 20 Coldest Summers and Top 20 Warmest Summers arranged by decade
• Map of Average number of 90+ degree days (1971-2000 normals)


• List of maximum number of consecutive days with 90 degrees or above temperatures for selected stations


• List of Extreme Temperatures for each station


• Temperature Data for Major Wisconsin Cities:
  

  Eau Claire	Green Bay	La Crosse
  Madison	Milwaukee	Wausau



• Long-term Variations in the Numbers of 90-degree days for Major Wisconsin Cities (current airport locations)
  

  Eau Claire	Green Bay	La Crosse
  Madison	Milwaukee	Wausau

Cooling Degree Days

• State Map of Cooling degree day units (1971-2000 normals)


• Weekly summaries of cooling degree day units by:
  
  • major city
  • population weighted by state (from Climate Prediction Center)


• Monthly summaries of cooling degree day units by:
  
  • major city
  • population weighted by state (from Climate Prediction Center)


• Archives of last 3 weeks and last three months of cooling degree day units


• List of weekly cooling degree day forecasts by state (from Climate Prediction Center)

Precipitation

• Map of Mean Summer Precipitation (1971-2000 normals)


• Long-term Variation in Average spring precipitation Statewide and:
  

  Northwest	North Central	Northeast
  West Central	Central	East Central
  Southwest	South Central	Southeast



• Precipitation Data for Major Wisconsin Cities:
  

  Eau Claire	Green Bay	La Crosse
  Madison	Milwaukee	Wausau

• Graph of Wisconsin's Top 20 Driest Summers and Top 20 Wettest Summers arranged by decade

Severe Weather

• Severe weather events and casualties from the Milwaukee/Sullivan NWS Forecast Office between 1982-2006:
  

  Tornadoes	Thunderstorm Winds
  Lightning	Hail
  All Severe Weather Events	All Flood Events
  Number of Heat Waves	Heat Wave Days
  	Heat Wave Deaths



• Tornado Maps from NWS Milwaukee Field Office for: 2001, 2002, 2003, 2004, 2005, and 2006.


• Wisconsin Severe Weather Climatology and Info Page from NWS Milwaukee Field Office


• Graph of annual number of Wisconsin tornadoes since 1950 according to F-scale


• Map and graph of annual number of Wisconsin tornadoes (1974-2006)


• Total number of Wisconsin tornadoes by county (1844-2006)


• Analysis of initiation times of severe weather events 1982-2006


• Number of hurricane-force wind events 75mph or greater and 100mph or greater in Wisconsin 1970-2006


• Heat index charts from National Climatic Data Center


• Interactive weather calculator from MRCC

Sunrise/Sunset

• Time of sunrise on: 21 June, 21 July, and 21 August.
  


• Time of sunset on: 21 June, 21 July, and 21 August.
  


• Duration of sunshine on: 21 June, 21 July, and 21 August.
  

Holidays

• Memorial Day (last Monday in May)


• Independence Day (fourth of July)