Tulsa has a temperate climate of the Continental climatecontinental variety. As is typical for the temperate zone, Tulsa's climate varies throughout the seasons and experiences occasional extremes. Year-round average temperature of 61°F. Summer temperatures of 40 °C (100 °F) or higher are often observed from July to early September. These are usually accompanied by high humidity, caused by warm air from the Gulf of Mexico brought in by southerly winds. Between May and September, Tulsa also experiences an "Ozone Season", caused by a combination of factors including climate and hydrocarbon emissions. During this season, Tulsa frequently issues "Ozone Alerts http://www.ozonealert.com", encouraging all parties to do their part in complying with the Clean Air Act and United States Environmental Protection AgencyE.P.A. standards. Winter temperatures, while generally mild, also occasionally experience extremes below -20 °C (0 °F). The Autumnfall season is quite short, consisting of a brief period of pleasant, sunny days and cool nights. Primarily during the Spring (season)spring and early summer months, the Tulsa area is often subjected to severe thunderstorms, some of which contain large hail, damaging winds and, not infrequently, tornadoes. Severe weather is not limited, though, to this season. On December 5th 1975, for example, Tulsa experienced a damaging tornado. The spring and early summer thunderstorm pattern also provides the area with a disproportionate share of its annual rainfall, which averages around 100 cm (39 inches). Due to frequent floodflooding in past decades, Tulsa now has one of the most extensive flood control systems in the nation. In 2000, Federal Emergency Management AgencyFEMA honored Tulsa as leading the nation in flood plain management.Federal Emergency Management AgencyFEMA News Release HQ-00-046a, 13-Sep-2000 http://www.fema.gov/news/newsrelease.fema?id Source: http://en.wikipedia.org/wiki/Tulsa%2C_Oklahoma

I will put it this way one day it was 70 outside the next day it snowed

it was 105 degrees yesterday - my underwear melted