Average Weather in Platte South Dakota, United States
In Platte, the summers are warm and mostly clear and the winters are freezing, dry, windy, and partly cloudy. Over the course of the year, the temperature typically varies from 14°F to 88°F and is rarely below -5°F or above 98°F.
Based on the tourism score, the best time of year to visit Platte for warm-weather activities is from mid June to early September.
The hot season lasts for 3.5 months, from June 3 to September 17, with an average daily high temperature above 77°F. The hottest day of the year is July 19, with an average high of 88°F and low of 65°F.
The cold season lasts for 3.3 months, from November 23 to March 2, with an average daily high temperature below 42°F. The coldest day of the year is January 2, with an average low of 14°F and high of 31°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature
In Platte, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year in Platte begins around June 8 and lasts for 4.1 months, ending around October 13. On July 27, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 75% of the time, and overcast or mostly cloudy 25% of the time.
The cloudier part of the year begins around October 13 and lasts for 7.9 months, ending around June 8. On March 15, the cloudiest day of the year, the sky is overcast or mostly cloudy 53% of the time, and clear, mostly clear, or partly cloudy 47% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Platte varies significantly throughout the year.
The wetter season lasts 4.9 months, from April 12 to September 9, with a greater than 22% chance of a given day being a wet day. The chance of a wet day peaks at 40% on June 9.
The drier season lasts 7.1 months, from September 9 to April 12. The smallest chance of a wet day is 3% on January 25.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation in Platte changes throughout the year.
Rain alone is the most common for 8.7 months, from February 27 to November 20. The highest chance of a day with rain alone is 40% on June 9.
Snow alone is the most common for 3.3 months, from November 20 to February 27. The highest chance of a day with snow alone is 5% on December 12.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Platte experiences significant seasonal variation in monthly rainfall.
The rainy period of the year lasts for 8.3 months, from March 5 to November 13, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around June 8, with an average total accumulation of 3.5 inches.
The rainless period of the year lasts for 3.7 months, from November 13 to March 5. The least rain falls around January 17, with an average total accumulation of 0.1 inches.
Average Monthly Rainfall
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.
As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Platte experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 6.0 months, from November 1 to May 2, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around December 1, with an average total liquid-equivalent accumulation of 0.3 inches.
The snowless period of the year lasts for 6.0 months, from May 2 to November 1. The least snow falls around July 20, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Platte varies significantly over the course of the year. In 2018, the shortest day is December 21, with 8 hours, 58 minutes of daylight; the longest day is June 21, with 15 hours, 25 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:54 AM on June 15, and the latest sunrise is 2 hours, 19 minutes later at 8:13 AM on November 3. The earliest sunset is at 4:59 PM on December 9, and the latest sunset is 4 hours, 21 minutes later at 9:20 PM on June 26.
Daylight saving time (DST) is observed in Platte during 2018, starting in the spring on March 11, lasting 7.8 months, and ending in the fall on November 4.
Sunrise & Sunset with Twilight and Daylight Saving Time
Platte experiences significant seasonal variation in the perceived humidity.
The muggier period of the year lasts for 3.0 months, from June 10 to September 10, during which time the comfort level is muggy, oppressive, or miserable at least 8% of the time. The muggiest day of the year is July 25, with muggy conditions 31% of the time.
The least muggy day of the year is November 25, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Platte experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 8.7 months, from September 12 to June 2, with average wind speeds of more than 11.0 miles per hour. The windiest day of the year is April 8, with an average hourly wind speed of 12.6 miles per hour.
The calmer time of year lasts for 3.3 months, from June 2 to September 12. The calmest day of the year is August 2, with an average hourly wind speed of 9.4 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Platte varies throughout the year.
The wind is most often from the north for 3.2 months, from February 1 to May 6, with a peak percentage of 37% on April 15. The wind is most often from the south for 5.6 months, from May 6 to October 24, with a peak percentage of 46% on August 22. The wind is most often from the west for 3.2 months, from October 24 to February 1, with a peak percentage of 39% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Platte throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Platte for general outdoor tourist activities is from mid June to early September, with a peak score in the second week of August.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Platte for hot-weather activities is from late June to mid August, with a peak score in the third week of July.
For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.
Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.
The growing season in Platte typically lasts for 5.6 months (170 days), from around April 24 to around October 11, rarely starting before April 5 or after May 15, and rarely ending before September 22 or after October 30.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Platte should appear around April 12, only rarely appearing before March 29 or after May 1.
Growing Degree Days
The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.
The brighter period of the year lasts for 3.4 months, from May 5 to August 18, with an average daily incident shortwave energy per square meter above 6.2 kWh. The brightest day of the year is July 3, with an average of 7.3 kWh.
The darker period of the year lasts for 3.4 months, from October 31 to February 11, with an average daily incident shortwave energy per square meter below 2.9 kWh. The darkest day of the year is December 20, with an average of 1.8 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Platte are 43.387 deg latitude, -98.845 deg longitude, and 1,598 ft elevation.
The topography within 2 miles of Platte contains only modest variations in elevation, with a maximum elevation change of 200 feet and an average elevation above sea level of 1,602 feet. Within 10 miles contains only modest variations in elevation (627 feet). Within 50 miles contains significant variations in elevation (1,224 feet).
The area within 2 miles of Platte is covered by cropland (75%) and grassland (25%), within 10 miles by cropland (74%) and grassland (26%), and within 50 miles by grassland (55%) and cropland (41%).
This report illustrates the typical weather in Platte, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Platte.
For each station, the records are corrected for the elevation difference between that station and Platte according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Platte is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Platte and a given station.
The stations contributing to this reconstruction are: Chamberlain, Chamberlain Municipal Airport (35%, 57 kilometers, northwest); Mitchell Municipal Airport (21%, 78 kilometers, northeast); Winner Regional Airport (20%, 81 kilometers, west); The O'Neill Municipal Airport (14%, 103 kilometers, south); and Chan Gurney Municipal Airport (10%, 133 kilometers, southeast).
Time zones for aiports and weather stations are provided by AskGeo.com .