Average Weather in Sheldon Iowa, United States
In Sheldon, the summers are long, warm, and humid; the winters are freezing, snowy, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 11°F to 85°F and is rarely below -10°F or above 92°F.
Based on the tourism score, the best time of year to visit Sheldon for warm-weather activities is from mid June to early September.
The warm season lasts for 4.1 months, from May 18 to September 21, with an average daily high temperature above 73°F. The hottest day of the year is July 5, with an average high of 85°F and low of 63°F.
The cold season lasts for 3.3 months, from November 26 to March 3, with an average daily high temperature below 39°F. The coldest day of the year is January 13, with an average low of 11°F and high of 28°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 Sheldon, 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 Sheldon begins around June 8 and lasts for 4.3 months, ending around October 17. On July 28, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 74% of the time, and overcast or mostly cloudy 26% of the time.
The cloudier part of the year begins around October 17 and lasts for 7.7 months, ending around June 8. On February 6, the cloudiest day of the year, the sky is overcast or mostly cloudy 55% of the time, and clear, mostly clear, or partly cloudy 45% 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 Sheldon varies significantly throughout the year.
The wetter season lasts 6.0 months, from April 7 to October 5, with a greater than 24% chance of a given day being a wet day. The chance of a wet day peaks at 42% on June 7.
The drier season lasts 6.0 months, from October 5 to April 7. The smallest chance of a wet day is 6% on February 8.
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 Sheldon changes throughout the year.
Rain alone is the most common for 9.2 months, from February 21 to November 29. The highest chance of a day with rain alone is 42% on June 7.
Snow alone is the most common for 2.8 months, from November 29 to February 21. The highest chance of a day with snow alone is 6% on December 11.
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. Sheldon experiences significant seasonal variation in monthly rainfall.
The rainy period of the year lasts for 9.2 months, from February 28 to December 2, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around June 16, with an average total accumulation of 4.0 inches.
The rainless period of the year lasts for 2.9 months, from December 2 to February 28. The least rain falls around January 24, 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. Sheldon experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 5.4 months, from October 30 to April 11, 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 10, with an average total liquid-equivalent accumulation of 0.3 inches.
The snowless period of the year lasts for 6.6 months, from April 11 to October 30. The least snow falls around July 18, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Sheldon varies significantly over the course of the year. In 2018, the shortest day is December 21, with 8 hours, 59 minutes of daylight; the longest day is June 21, with 15 hours, 23 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:43 AM on June 14, and the latest sunrise is 2 hours, 18 minutes later at 8:00 AM on November 3. The earliest sunset is at 4:48 PM on December 9, and the latest sunset is 4 hours, 19 minutes later at 9:07 PM on June 26.
Daylight saving time (DST) is observed in Sheldon 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
Sheldon experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 3.3 months, from June 5 to September 15, during which time the comfort level is muggy, oppressive, or miserable at least 13% of the time. The muggiest day of the year is July 22, with muggy conditions 52% of the time.
The least muggy day of the year is December 6, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
The average hourly wind speed in Sheldon experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 8.2 months, from September 25 to June 1, with average wind speeds of more than 11.1 miles per hour. The windiest day of the year is April 8, with an average hourly wind speed of 13.4 miles per hour.
The calmer time of year lasts for 3.8 months, from June 1 to September 25. The calmest day of the year is August 3, with an average hourly wind speed of 8.8 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Sheldon varies throughout the year.
The wind is most often from the south for 6.9 months, from May 2 to November 28, with a peak percentage of 48% on August 27. The wind is most often from the north for 1.9 weeks, from November 28 to December 11; for 4.0 days, from December 20 to December 24; and for 4.2 months, from December 27 to May 2, with a peak percentage of 31% on December 10. The wind is most often from the west for 1.3 weeks, from December 11 to December 20 and for 3.0 days, from December 24 to December 27, with a peak percentage of 31% on December 16.
Best Time of Year to Visit
To characterize how pleasant the weather is in Sheldon 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 Sheldon 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 Sheldon 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 Sheldon typically lasts for 5.1 months (155 days), from around April 29 to around October 1, rarely starting before April 12 or after May 17, and rarely ending before September 14 or after October 19.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Sheldon should appear around April 17, only rarely appearing before April 5 or after May 5.
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 3.5 months, from May 4 to August 20, with an average daily incident shortwave energy per square meter above 6.1 kWh. The brightest day of the year is July 8, with an average of 7.2 kWh.
The darker period of the year lasts for 3.4 months, from October 31 to February 10, with an average daily incident shortwave energy per square meter below 2.8 kWh. The darkest day of the year is December 19, with an average of 1.7 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Sheldon are 43.181 deg latitude, -95.856 deg longitude, and 1,407 ft elevation.
The topography within 2 miles of Sheldon contains only modest variations in elevation, with a maximum elevation change of 105 feet and an average elevation above sea level of 1,400 feet. Within 10 miles also contains only modest variations in elevation (259 feet). Within 50 miles contains only modest variations in elevation (755 feet).
The area within 2 miles of Sheldon is covered by cropland (93%), within 10 miles by cropland (100%), and within 50 miles by cropland (97%).
This report illustrates the typical weather in Sheldon, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Sheldon.
For each station, the records are corrected for the elevation difference between that station and Sheldon 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 Sheldon is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Sheldon and a given station.
The stations contributing to this reconstruction are: Sheldon (94%, 3.5 kilometers, northeast); Orange City Municipal Airport (4.5%, 27 kilometers, southwest); and Cherokee Municipal Airport (1.5%, 56 kilometers, southeast).
Time zones for aiports and weather stations are provided by AskGeo.com .