Sinai, South Dakota has a mild climate with warm summers and cold winters. The average temperature in July is around 76 掳F (24 掳C), while the average temperature in January is around 19 掳F (-7 掳C). Rainfall is moderate throughout the year, and snowfall can also be expected during the winter months. Spring and autumn are generally pleasant, with temperatures moderated by cool breezes from the nearby hills. In general, Sinai offers a comfortable climate for outdoor activities all year round.
Sinai, South Dakota gets 26 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Sinai averages 37 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 212 sunny days per year in Sinai. The US average is 205 sunny days.
Sinai gets some kind of precipitation, on average, 86 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 83 degrees
Winter Low: the January low is 5
Rain: averages 26 inches of rain a year
Snow: averages 37 inches of snow a year