Hennessey, OK has a mild climate that is typical of the Great Plains area. Winters tend to be cold with occasional snowfall while summers are warm and humid. The average annual temperature in Hennessey is 64°F (18°C). The average annual precipitation is about 37 inches (94 cm), with most of it occurring during the late spring and summer months. Summers are long and can be hot and humid, but temperatures usually remain comfortable due to prevailing winds from the Gulf of Mexico. Spring in Hennessey is often wet and unpredictable, but autumn is typically dry with cooler temperatures.
Hennessey, Oklahoma gets 35 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Hennessey averages 7 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 238 sunny days per year in Hennessey. The US average is 205 sunny days.
Hennessey gets some kind of precipitation, on average, 71 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 94 degrees
Winter Low: the January low is 24
Rain: averages 35 inches of rain a year
Snow: averages 7 inches of snow a year