Average Weather in May in Mattawan Michigan, United States
Daily high temperatures increase by 9°F, from 64°F to 73°F, rarely falling below 51°F or exceeding 84°F.
Daily low temperatures increase by 9°F, from 45°F to 54°F, rarely falling below 35°F or exceeding 65°F.
For reference, on July 19, the hottest day of the year, temperatures in Mattawan typically range from 63°F to 82°F, while on January 29, the coldest day of the year, they range from 19°F to 31°F.
Average High and Low Temperature in May
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on May. 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 May
The month of May in Mattawan experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 50% throughout the month.
The clearest day of the month is May 31, with clear, mostly clear, or partly cloudy conditions 52% of the time.
For reference, on December 29, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 68%, while on August 26, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 69%.
Cloud Cover Categories in May
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Mattawan, the chance of a wet day over the course of May is increasing, starting the month at 31% and ending it at 35%.
For reference, the year's highest daily chance of a wet day is 36% on July 24, and its lowest chance is 17% on February 8.
Probability of Precipitation in May
The average sliding 31-day rainfall during May in Mattawan is gradually increasing, starting the month at 2.9 inches, when it rarely exceeds 4.8 inches or falls below 1.1 inches, and ending the month at 3.3 inches, when it rarely exceeds 5.7 inches or falls below 1.2 inches.
The highest average 31-day accumulation is 3.3 inches on May 31.
Average Monthly Rainfall in May
Over the course of May in Mattawan, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 58 minutes, implying an average daily increase of 1 minute, 57 seconds, and weekly increase of 13 minutes, 38 seconds.
The shortest day of the month is May 1, with 14 hours, 4 minutes of daylight and the longest day is May 31, with 15 hours, 2 minutes of daylight.
Hours of Daylight and Twilight in May
The latest sunrise of the month in Mattawan is 6:38 AM on May 1 and the earliest sunrise is 29 minutes earlier at 6:09 AM on May 31.
The earliest sunset is 8:42 PM on May 1 and the latest sunset is 30 minutes later at 9:12 PM on May 31.
Daylight saving time is observed in Mattawan during 2018, but it neither starts nor ends during May, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 6:06 AM and sets 15 hours, 16 minutes later, at 9:23 PM, while on December 21, the shortest day of the year, it rises at 8:08 AM and sets 9 hours, 6 minutes later, at 5:14 PM.
Sunrise & Sunset with Twilight in May
The chance that a given day will be muggy in Mattawan is increasing during May, rising from 1% to 8% over the course of the month.
For reference, on August 1, the muggiest day of the year, there are muggy conditions 38% of the time, while on November 16, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in May
The average hourly wind speed in Mattawan is decreasing during May, decreasing from 11.2 miles per hour to 9.5 miles per hour over the course of the month.
For reference, on January 15, the windiest day of the year, the daily average wind speed is 13.2 miles per hour, while on August 4, the calmest day of the year, the daily average wind speed is 7.9 miles per hour.
Average Wind Speed in May
Wind Direction in May
Mattawan is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average surface water temperature in Mattawan is rapidly increasing during May, rising by 8°F, from 40°F to 48°F, over the course of the month.
Average Water Temperature in May
The growing season in Mattawan typically lasts for 5.9 months (180 days), from around April 24 to around October 21, rarely starting before April 7 or after May 10, and rarely ending before September 29 or after November 10.
The month of May in Mattawan is more likely than not fully within the growing season, with the chance that a given day is in the growing season rapidly increasing from 70% to 100% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in May
The average accumulated growing degree days in Mattawan are increasing during May, increasing by 298°F, from 162°F to 460°F, over the course of the month.
Growing Degree Days in May
The average daily incident shortwave solar energy in Mattawan is gradually increasing during May, rising by 0.8 kWh, from 5.8 kWh to 6.6 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in May
For the purposes of this report, the geographical coordinates of Mattawan are 42.209 deg latitude, -85.784 deg longitude, and 860 ft elevation.
The topography within 2 miles of Mattawan contains only modest variations in elevation, with a maximum elevation change of 177 feet and an average elevation above sea level of 868 feet. Within 10 miles also contains only modest variations in elevation (371 feet). Within 50 miles contains only modest variations in elevation (574 feet).
The area within 2 miles of Mattawan is covered by trees (44%), cropland (39%), and artificial surfaces (17%), within 10 miles by trees (44%) and cropland (42%), and within 50 miles by cropland (55%) and trees (22%).
This report illustrates the typical weather in Mattawan 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 Mattawan.
For each station, the records are corrected for the elevation difference between that station and Mattawan 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 Mattawan is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Mattawan and a given station.
The stations contributing to this reconstruction are: Kalamazoo-Battle Creek International Airport (52%, 19 kilometers, east); Hree Rivers Municipal Dr Haines Airport (24%, 32 kilometers, southeast); South Haven Area Regional Airport (16%, 42 kilometers, west); and Michigan City Municipal Airport-Phillips Field (8%, 70 kilometers, southwest).
Time zones for aiports and weather stations are provided by AskGeo.com .