Mellette County, SD Weather


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United States / South Dakota / No Metro Area / Mellette County / Cities / Zip Codes

The most pleasant months of the year for Mellette County are September, June and May. In Mellette County, there are 3 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Mellette County with an average high temperature of 88.5°, which ranks it as one of the hottest places in South Dakota. March is the snowiest month in Mellette County with 9.0 inches of snow, and 7 months of the year have significant snowfall. There are few days during the summer when the humidity becomes unpleasant.

Today's Weather - Mellette, SD

2 PM PST

Sunny

72°F

7 DAY FORECASTDESCRIPTIONHIGH/LOWWIND
This AfternoonSunny73° / 47°NW 21 mph
SaturdaySunny78° / 49°SW 6 to 10 mph
SundayMostly Sunny then Slight Chance Showers And Thunderstorms79° / 47°NW 8 to 14 mph
MondaySunny75° / 51°NE 5 to 12 mph
TuesdayChance Showers And Thunderstorms77° / 51°SW 15 mph
WednesdayChance Showers And Thunderstorms66° / 44°NW 14 to 17 mph
ThursdaySlight Chance Rain Showers69° / 47°NW 10 to 17 mph

Weather Highlights

Summer High: the July high is around 89 degrees
Winter Low: the January low is 12
Rain: averages 20 inches of rain a year
Snow: averages 40 inches of snow a year


BESTPLACES COMFORT INDEX

The annual BestPlaces Comfort Index for the Mellette County area is 8.9 (10=best), which means it is more comfortable than most places in South Dakota.

8.9 / 10

A higher score indicates a more comfortable year-round climate. The US average for the comfort index is 7.8. Our index is based on the total number of days annually within the comfort range of 70-80 degrees, and we also applied a penalty for days of excessive humidity.


Average Monthly High and Low (°F)
HighLow
January35° 12°
February39° 15°
March48° 23°
April60° 34°
May70° 45°
June80° 55°
July89° 61°
August87° 59°
September78° 49°
October63° 36°
November47° 23°
December36° 13°
Hot, Freezing, Rainy, Snowy Days: Mellette
Hot
Days
Freezing
Days
Rainy
Days
Snowy
Days
January02943
February02644
March02563
April01392
May12100
June40100
July14090
August13070
September5160
October11071
November02453
December03054

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

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