Hamlin, SD has a continental climate with long, cold winters and hot, humid summers. The average annual temperature is around 50 degrees Fahrenheit (10 Celsius). Snowfall is common during winter months, while rainfall occurs throughout the year. Average summer temperatures can reach into the 80s, with temperatures sometimes reaching to the mid 90s in July and August. Spring and fall tend to be milder but can have more extreme temperatures if weather systems move through.
Hamlin, South Dakota gets 25 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Hamlin averages 39 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 210 sunny days per year in Hamlin. The US average is 205 sunny days.
Hamlin gets some kind of precipitation, on average, 87 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 82 degrees
Winter Low: the January low is 2
Rain: averages 25 inches of rain a year
Snow: averages 39 inches of snow a year