Average Weather in Harrisonville Missouri, United States
In Harrisonville, the summers are hot, muggy, and wet; the winters are very cold and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 24°F to 89°F and is rarely below 8°F or above 97°F.
Based on the tourism score, the best time of year to visit Harrisonville for warm-weather activities is from late May to late September.
The hot season lasts for 3.5 months, from June 1 to September 16, with an average daily high temperature above 79°F. The hottest day of the year is July 21, with an average high of 89°F and low of 71°F.
The cold season lasts for 3.0 months, from November 27 to February 26, with an average daily high temperature below 50°F. The coldest day of the year is January 22, with an average low of 24°F and high of 41°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 Harrisonville, 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 Harrisonville begins around June 9 and lasts for 4.6 months, ending around October 30. On August 26, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 71% of the time, and overcast or mostly cloudy 29% of the time.
The cloudier part of the year begins around October 30 and lasts for 7.3 months, ending around June 9. On February 11, the cloudiest day of the year, the sky is overcast or mostly cloudy 52% of the time, and clear, mostly clear, or partly cloudy 48% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Harrisonville varies significantly throughout the year.
The wetter season lasts 5.9 months, from March 31 to September 26, with a greater than 28% chance of a given day being a wet day. The chance of a wet day peaks at 45% on June 8.
The drier season lasts 6.1 months, from September 26 to March 31. The smallest chance of a wet day is 11% on January 12.
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 throughout the year is rain alone, with a peak probability of 45% on June 8.
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. Harrisonville experiences extreme seasonal variation in monthly rainfall.
Rain falls throughout the year in Harrisonville. The most rain falls during the 31 days centered around June 4, with an average total accumulation of 5.1 inches.
The least rain falls around January 16, with an average total accumulation of 0.7 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. Harrisonville experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 3.9 months, from November 21 to March 19, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around January 31, with an average total liquid-equivalent accumulation of 0.3 inches.
The snowless period of the year lasts for 8.1 months, from March 19 to November 21. The least snow falls around July 27, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Harrisonville varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 28 minutes of daylight; the longest day is June 21, with 14 hours, 52 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:52 AM on June 13, and the latest sunrise is 1 hour, 54 minutes later at 7:46 AM on November 3. The earliest sunset is at 4:55 PM on December 7, and the latest sunset is 3 hours, 50 minutes later at 8:46 PM on June 28.
Daylight saving time (DST) is observed in Harrisonville 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
Harrisonville experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 4.0 months, from May 23 to September 22, during which time the comfort level is muggy, oppressive, or miserable at least 18% of the time. The muggiest day of the year is July 23, with muggy conditions 71% of the time.
The least muggy day of the year is February 8, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
The average hourly wind speed in Harrisonville experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 7.2 months, from October 13 to May 20, with average wind speeds of more than 10.0 miles per hour. The windiest day of the year is April 1, with an average hourly wind speed of 12.3 miles per hour.
The calmer time of year lasts for 4.8 months, from May 20 to October 13. The calmest day of the year is August 7, with an average hourly wind speed of 7.6 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Harrisonville varies throughout the year.
The wind is most often from the south for 9.5 months, from March 14 to December 29, with a peak percentage of 55% on June 26. The wind is most often from the north for 2.5 months, from December 29 to March 14, with a peak percentage of 32% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Harrisonville 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 Harrisonville for general outdoor tourist activities is from late May to late September, with a peak score in the last 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 Harrisonville for hot-weather activities is from late June to late 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 Harrisonville typically lasts for 6.8 months (209 days), from around April 4 to around October 30, rarely starting before March 14 or after April 21, and rarely ending before October 12 or after November 17.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Harrisonville should appear around March 17, only rarely appearing before March 4 or after April 5.
Growing Degree Days
The average daily incident shortwave solar energy experiences significant seasonal variation over the course of the year.
The brighter period of the year lasts for 4.0 months, from April 29 to August 27, with an average daily incident shortwave energy per square meter above 6.0 kWh. The brightest day of the year is July 9, with an average of 7.0 kWh.
The darker period of the year lasts for 3.2 months, from November 4 to February 9, with an average daily incident shortwave energy per square meter below 3.1 kWh. The darkest day of the year is December 17, with an average of 2.1 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Harrisonville are 38.653 deg latitude, -94.349 deg longitude, and 928 ft elevation.
The topography within 2 miles of Harrisonville contains only modest variations in elevation, with a maximum elevation change of 203 feet and an average elevation above sea level of 930 feet. Within 10 miles also contains only modest variations in elevation (338 feet). Within 50 miles contains only modest variations in elevation (522 feet).
The area within 2 miles of Harrisonville is covered by artificial surfaces (49%) and cropland (48%), within 10 miles by cropland (87%), and within 50 miles by cropland (73%) and trees (15%).
This report illustrates the typical weather in Harrisonville, 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 6 weather stations near enough to contribute to our estimation of the temperature and dew point in Harrisonville.
For each station, the records are corrected for the elevation difference between that station and Harrisonville 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 Harrisonville is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Harrisonville and a given station.
The stations contributing to this reconstruction are: Lee's Summit Municipal Airport (34%, 34 kilometers, north); Johnson County Executive Airport (26%, 40 kilometers, northwest); Skyhaven Airport (19%, 50 kilometers, east); Clinton Memorial Airport (12%, 67 kilometers, southeast); Atkinson Municipal Airport (4.2%, 138 kilometers, south); and Chanute Martin Johnson Airport (3.8%, 148 kilometers, southwest).
Time zones for aiports and weather stations are provided by AskGeo.com .