Average Weather in March in Jefferson Iowa, United States
Daily high temperatures increase by 15°F, from 41°F to 56°F, rarely falling below 25°F or exceeding 72°F.
Daily low temperatures increase by 11°F, from 24°F to 35°F, rarely falling below 8°F or exceeding 48°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 March
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on March. 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 March
The month of March in Jefferson experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 52% throughout the month.
The clearest day of the month is March 25, with clear, mostly clear, or partly cloudy conditions 49% 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 March
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 March is very rapidly increasing, starting the month at 13% and ending it at 22%.
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.
Over the course of March in Jefferson, the chance of a day with only rain increases from 7% to 20%, the chance of a day with mixed snow and rain remains an essentially constant 2% throughout, and the chance of a day with only snow decreases from 4% to 1%.
Probability of Precipitation in March
The average sliding 31-day rainfall during March in Jefferson is rapidly increasing, starting the month at 0.7 inches, when it rarely exceeds 1.8 inches, and ending the month at 2.0 inches, when it rarely exceeds 3.5 inches or falls below 0.6 inches.
Average Monthly Rainfall in March
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. As with rainfall, we consider the liquid-equivalent snowfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day liquid-equivalent snowfall during March in Jefferson is essentially constant, remaining about 0.2 inches throughout, and rarely exceeding 0.6 inches or falling below -0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in March
Over the course of March in Jefferson, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 25 minutes, implying an average daily increase of 2 minutes, 50 seconds, and weekly increase of 19 minutes, 51 seconds.
The shortest day of the month is March 1, with 11 hours, 15 minutes of daylight and the longest day is March 31, with 12 hours, 40 minutes of daylight.
Hours of Daylight and Twilight in March
The earliest sunrise of the month in Jefferson is 6:37 AM on March 10 and the latest sunrise is 58 minutes later at 7:36 AM on March 11.
The earliest sunset is 6:07 PM on March 1 and the latest sunset is 1 hour, 34 minutes later at 7:42 PM on March 31.
Daylight saving time (DST) starts at 3:00 AM on March 11, 2018, shifting sunrise and sunset to be an hour later.
For reference, on June 21, the longest day of the year, the Sun rises at 5:42 AM and sets 15 hours, 15 minutes later, at 8:56 PM, while on December 21, 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 March
The chance that a given day will be muggy in Jefferson is essentially constant during March, remaining around 0% throughout.
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 March
The average hourly wind speed in Jefferson is gradually increasing during March, increasing from 12.6 miles per hour to 13.1 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 March
Wind Direction in March
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.
The month of March in Jefferson is more likely than not fully outside of the growing season, with the chance that a given day is in the growing season increasing from 0% to 10% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in March
The average accumulated growing degree days in Jefferson are gradually increasing during March, increasing by 45°F, from 7°F to 52°F, over the course of the month.
Growing Degree Days in March
The average daily incident shortwave solar energy in Jefferson is increasing during March, rising by 1.2 kWh, from 3.6 kWh to 4.8 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in March
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 .