Average Weather in October in Jefferson Iowa, United States
Daily high temperatures decrease by 14°F, from 70°F to 56°F, rarely falling below 40°F or exceeding 83°F.
Daily low temperatures decrease by 11°F, from 48°F to 37°F, rarely falling below 26°F or exceeding 60°F.
For reference, on July 18, the hottest day of the year, temperatures in Jefferson typically range from 65°F to 85°F, while on January 22, the coldest day of the year, they range from 14°F to 31°F.
Average High and Low Temperature in October
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on October. The horizontal axis is the day, 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 October
The month of October in Jefferson experiences increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 34% to 44%.
The clearest day of the month is October 1, with clear, mostly clear, or partly cloudy conditions 66% of the time.
For reference, on December 29, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 55%, while on July 28, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 71%.
Cloud Cover Categories in October
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. In Jefferson, the chance of a wet day over the course of October is rapidly decreasing, starting the month at 25% and ending it at 18%.
For reference, the year's highest daily chance of a wet day is 43% on June 7, and its lowest chance is 8% on January 11.
Probability of Precipitation in October
The average sliding 31-day rainfall during October in Jefferson is decreasing, starting the month at 2.5 inches, when it rarely exceeds 4.4 inches or falls below 0.9 inches, and ending the month at 1.6 inches, when it rarely exceeds 3.1 inches or falls below 0.4 inches.
Average Monthly Rainfall in October
Over the course of October in Jefferson, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 21 minutes, implying an average daily decrease of 2 minutes, 42 seconds, and weekly decrease of 18 minutes, 53 seconds.
The shortest day of the month is October 31, with 10 hours, 24 minutes of daylight and the longest day is October 1, with 11 hours, 45 minutes of daylight.
Hours of Daylight and Twilight in October
The earliest sunrise of the month in Jefferson is 7:14 AM on October 1 and the latest sunrise is 34 minutes later at 7:48 AM on October 31.
The latest sunset is 6:59 PM on October 1 and the earliest sunset is 46 minutes earlier at 6:12 PM on October 31.
Daylight saving time is observed in Jefferson during 2019, but it neither starts nor ends during October, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:41 AM and sets 15 hours, 15 minutes later, at 8:56 PM, while on December 22, the shortest day of the year, it rises at 7:42 AM and sets 9 hours, 7 minutes later, at 4:49 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in October
The chance that a given day will be muggy in Jefferson is gradually decreasing during October, falling from 4% to 0% over the course of the month.
For reference, on July 21, the muggiest day of the year, there are muggy conditions 55% of the time, while on November 8, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in October
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Jefferson is gradually increasing during October, increasing from 10.8 miles per hour to 11.4 miles per hour over the course of the month.
For reference, on April 12, the windiest day of the year, the daily average wind speed is 13.2 miles per hour, while on August 3, the calmest day of the year, the daily average wind speed is 8.3 miles per hour.
Average Wind Speed in October
Wind Direction in October
The growing season in Jefferson typically lasts for 5.8 months (178 days), from around April 18 to around October 12, rarely starting before March 31 or after May 6, and rarely ending before September 25 or after October 30.
During October in Jefferson, the chance that a given day is within the growing season is very rapidly decreasing falling from 79% to 8% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in October
The average accumulated growing degree days in Jefferson are increasing during October, increasing by 184°F, from 3,058°F to 3,242°F, over the course of the month.
Growing Degree Days in October
The average daily incident shortwave solar energy in Jefferson is decreasing during October, falling by 1.5 kWh, from 4.4 kWh to 2.9 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in October
For the purposes of this report, the geographical coordinates of Jefferson are 42.015 deg latitude, -94.377 deg longitude, and 1,047 ft elevation.
The topography within 2 miles of Jefferson contains only modest variations in elevation, with a maximum elevation change of 112 feet and an average elevation above sea level of 1,042 feet. Within 10 miles also contains only modest variations in elevation (276 feet). Within 50 miles contains only modest variations in elevation (801 feet).
The area within 2 miles of Jefferson is covered by cropland (83%) and artificial surfaces (15%), within 10 miles by cropland (98%), and within 50 miles by cropland (94%).
This report illustrates the typical weather in Jefferson year round, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Jefferson.
For each station, the records are corrected for the elevation difference between that station and Jefferson 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 Jefferson is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Jefferson and a given station.
The stations contributing to this reconstruction are: Perry Municipal Airport (40%, 28 kilometers, southeast); Arthur N Neu Airport (28%, 34 kilometers, west); Boone Municipal Airport (20%, 44 kilometers, east); and Fort Dodge Municipal Airport (12%, 62 kilometers, north).
Time zones for aiports and weather stations are provided by AskGeo.com .