Lyon, SD Climate


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United States / South Dakota / No Metro Area / Brule County / Lyon / Zip Codes
Lyon, SD has a continental climate with cold, dry winters and hot, humid summers. The average annual temperature in Lyon is 46°F (7.8°C). Winter temperatures typically range between 11 and 33°F (-11.6 and 0.5°C). In the summer months, temperatures usually range from 56 to 85°F (13.3 to 29.4°C). On average, Lyon gets about 20 inches of rain a year with snowfall averaging 27 inches per year.

Lyon, South Dakota gets 23 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Lyon averages 40 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 213 sunny days per year in Lyon. The US average is 205 sunny days.

Lyon 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 87 degrees
Winter Low: the January low is 9
Rain: averages 23 inches of rain a year
Snow: averages 40 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Lyon is 6.9 (10=best), which means it is more comfortable than most places in South Dakota.

9.1 Summer - 4.6 Winter
June, August and September are the most pleasant months in Lyon, while January and December are the least comfortable months.

  ClimateLyon, South DakotaUnited States
    Unlock38.1 in.
  39.8 in.  Unlock
    Unlock106.2 days
  213 days  Unlock
  87.3°85.8°
    Unlock21.7°
  6.9  Unlock
    Unlock4.3
  1555 ft.  Unlock
Climate
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.

July is the hottest month for Lyon with an average high temperature of 87.3°, which ranks it as warmer than most places in South Dakota. In Lyon, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Lyon are September, June and August.
In Lyon, there are 28.0 days annually when the high temperature is over 90°, which is hotter than most places in South Dakota.
January has the coldest nighttime temperatures for Lyon with an average of 9.3°. This is warmer than most places in South Dakota.
In Lyon, there are 161.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in South Dakota.
In Lyon, there are 20.9 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in South Dakota.
Humidity in Lyon is generally low and comfortable. But there some days when the humidity becomes unpleasant, especially in July and August. The most humid months (but still comfortable) are July, August and June.
June is the wettest month in Lyon with 3.9 inches of rain, and the driest month is January with 0.5 inches. The wettest season is Autumn with 40% of yearly precipitation and 7% occurs in Spring, which is the driest season. The annual rainfall of 23.1 inches in Lyon means that it is about average compared to other places in South Dakota.
May is the rainiest month in Lyon with 10.8 days of rain, and February is the driest month with only 4.7 rainy days. There are 86.6 rainy days annually in Lyon, which is rainier than most places in South Dakota. The rainiest season is Autumn when it rains 31% of the time and the driest is Spring with only a 17% chance of a rainy day.
An annual snowfall of 39.8 inches in Lyon means that it is snowier than most places in South Dakota. March is the snowiest month in Lyon with 8.6 inches of snow, and 7 months of the year have significant snowfall.
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