Average yearly precipitation for Illinois varies from just over 48 inches (1,200 mm) at the southern tip to just under 32 inches (810 mm) in the northern portion of the state. May and June are the wettest months of the year. Flooding is the most damaging weather hazard within the state.he highest temperature recorded in Illinois was 117 Â°F (47 Â°C), recorded on July 14, 1954, at East St. Louis, while the lowest temperature was -37 Â°F (-39 Â°C), recorded on January 15, 2009, at Rochelle.
About This Statistic. The statistic shows global GDP (gross domestic product) from 2010 to 2014, with projections up until 2020. In 2015, global GDP amounted to about 74.2 trillion U.S. dollars.
Method 1 Calculating Labor Productivity. Determine the country's Gross Domestic Product (GDP). The GDP of a country is the measure of goods and services produced within a specific time period. You'll need that number to calculate productivity based on GDP. 1  Fortunately, the GDP is a figure that's already calculated for you and delivered by one of the country's agencies.  The GDP for many countries is available online. Google the country's name plus GDP.