Climate Oklahoma City

oklahoma city has humid subtropical climate (köppen: cfa), frequent variations in weather daily , seasonally, except during consistently hot , humid summer months. prolonged , severe droughts (sometimes leading wildfires in vicinity) heavy rainfall leading flash flooding , flooding occur regularity. consistent winds, south or south-southeast during summer, temper hotter weather. consistent northerly winds during winter can intensify cold periods. severe ice storms , snowstorms happen sporadically during winter.

the average temperature 61.4 °f (16.3 °c), monthly daily average ranging 39.2 °f (4.0 °c) in january 83.0 °f (28.3 °c) in july. extremes range −17 °f (−27 °c) on february 12, 1899 113 °f (45 °c) on august 11, 1936 , august 3, 2012; last sub-zero (°f) reading −3 °f (−19 °c) on january 7, 2017. temperatures reach 100 °f (38 °c) on 10.4 days of year, 90 °f (32 °c) on 70 days, , fail rise above freezing on 8.3 days. city receives 35.9 inches (91.2 cm) of precipitation annually, of 8.6 inches (21.8 cm) snow.

the report regional climate trends , scenarios u.s. national climate assessment (nca) 2013 noaa, projects parts of great plains region can expect 30% (high emissions scenario based on cmip3 , narccap models) increase in extreme precipitation days mid-century. definition based on days receiving more 1 inch of rainfall.

extreme weather

oklahoma city has active severe weather season march through june, during april , may. being in center of colloquially referred tornado alley, prone frequent , severe tornadoes, severe hailstorms , occasional derechoes. tornadoes have occurred in every month of year , secondary smaller peak occurs during autumn, october. oklahoma city metropolitan area 1 of tornado-prone major cities in world, 150 tornadoes striking within city limits since 1890. since time weather records have been kept, oklahoma city has been struck thirteen violent tornadoes, eleven f/ef4s , 2 f/ef5s.

on may 3, 1999, parts of oklahoma city , surrounding communities impacted tornado. last u.s. tornado given rating of f5 on fujita scale before enhanced fujita scale replaced in 2007. while tornado in vicinity of bridge creek southwest, wind speeds of 318 mph (510 km/h) estimated mobile doppler radar, highest wind speeds ever recorded on earth. second top-of-the-scale tornado occurred on may 20, 2013; south oklahoma city, along newcastle , moore, hit ef5 tornado. tornado 0.5 1.3 miles (0.80 2.09 km) wide , killed 23 people. on may 31, less 2 weeks after may 20 event, outbreak affected oklahoma city area. within oklahoma city, system spawned ef1 , ef0 tornado, , in el reno west, ef3 tornado occurred. lattermost tornado, heading in direction of oklahoma city before dissipated, had width of 2.6 miles (4.2 km), making widest tornado ever recorded. additionally, winds of >295 mph (475 km/h) measured, 1 of 2 highest wind records tornado.

with 19.48 inches (495 mm) of rainfall, may 2015 far oklahoma city s record-wettest month since record keeping began in 1890. across oklahoma , texas generally, there record flooding in latter part of month.

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