Average Weather in Grand Rapids Minnesota, United States
In Grand Rapids, the temperature typically varies from 1°F to 79°F over the course of the year, and is rarely below -21°F or above 87°F.
The warm season lasts for 4.0 months, from May 17 to September 16, with an average daily high temperature above 66°F. The hottest day of the year is July 18, with an average high of 79°F and low of 58°F.
The cold season lasts for 3.3 months, from November 25 to March 2, with an average daily high temperature below 31°F. The coldest day of the year is January 15, with an average low of 1°F and high of 19°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
The length of the day in Grand Rapids varies significantly over the course of the year. In 2017, the shortest day is December 21, with 8 hours, 29 minutes of daylight; the longest day is June 21, with 15 hours, 56 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:17 AM on June 15, and the latest sunrise is 2 hours, 45 minutes later at 8:02 AM on November 4. The earliest sunset is at 4:23 PM on December 10, and the latest sunset is 4 hours, 50 minutes later at 9:14 PM on June 25.
Daylight saving time (DST) is observed in Grand Rapids during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.
Sunrise & Sunset with Twilight and Daylight Saving Time
In Grand Rapids, 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 Grand Rapids begins around May 25 and lasts for 4.6 months, ending around October 13. On August 2, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 72% of the time, and overcast or mostly cloudy 28% of the time.
The cloudier part of the year begins around October 13 and lasts for 7.4 months, ending around May 25. On February 5, the cloudiest day of the year, the sky is overcast or mostly cloudy 67% of the time, and clear, mostly clear, or partly cloudy 33% of the time.
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Grand Rapids varies significantly throughout the year.
The wetter season lasts 5.3 months, from April 27 to October 4, with a greater than 24% chance of a given day being a wet day. The chance of a wet day peaks at 43% on June 30.
The drier season lasts 6.8 months, from October 4 to April 27. The smallest chance of a wet day is 6% on February 4.
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 Grand Rapids changes throughout the year.
Rain alone is the most common for 8.3 months, from March 13 to November 21. The highest chance of a day with rain alone is 43% on June 30.
Snow alone is the most common for 3.7 months, from November 21 to March 13. The highest chance of a day with snow alone is 8% on January 13.
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 in the year. Grand Rapids experiences significant seasonal variation in monthly rainfall.
The rainy period of the year lasts for 8.3 months, from March 15 to November 23, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around June 24, with an average total accumulation of 4.0 inches.
The rainless period of the year lasts for 3.7 months, from November 23 to March 15. The least rain falls around January 26, with and average total accumulation of 0.0 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 in the year. Grand Rapids experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 6.2 months, from October 25 to April 30, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around November 30, with an average total liquid-equivalent accumulation of 0.4 inches.
The snowless period of the year lasts for 5.8 months, from April 30 to October 25. The least snow falls around July 16, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.
Grand Rapids experiences some seasonal variation in the perceived humidity.
The muggier period of the year lasts for 2.7 months, from June 18 to September 9, during which time the comfort level is muggy, oppressive, or miserable at least 3% of the time. The muggiest day of the year is July 19, with muggy conditions 11% of the time.
The least muggy day of the year is February 27, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.
The average hourly wind speed in Grand Rapids experiences mildly seasonal variation over the course of the year.
The windier part of the year lasts for 8.4 months, from September 11 to May 24, with average wind speeds of more than 5.5 miles per hour. The windiest day of the year is April 2, with an average hourly wind speed of 6.2 miles per hour.
The calmer time of year lasts for 3.6 months, from May 24 to September 11. The calmest day of the year is July 31, with an average hourly wind speed of 4.8 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Grand Rapids varies throughout the year.
The wind is most often from the north for 2.9 months, from February 13 to May 11, with a peak percentage of 33% on April 12. The wind is most often from the south for 1.4 months, from May 11 to June 24 and for 1.4 months, from August 7 to September 20, with a peak percentage of 37% on September 2. The wind is most often from the west for 1.5 months, from June 24 to August 7 and for 4.8 months, from September 20 to February 13, with a peak percentage of 35% on January 4.
This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy experiences very significant seasonal variation over the course of the year.
The brighter period of the year lasts for 3.6 months, from May 4 to August 22, with an average daily incident shortwave energy per square meter above 5.7 kWh. The brightest day of the year is July 10, with an average of 6.9 kWh.
The darker period of the year lasts for 3.5 months, from October 26 to February 12, with an average daily incident shortwave energy per square meter below 2.4 kWh. The darkest day of the year is December 20, with an average of 1.2 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Grand Rapids are 47.237 deg latitude, -93.530 deg longitude, and 1,296 ft elevation.
The topography within 2 miles of Grand Rapids contains only modest variations in elevation, with a maximum elevation change of 167 feet, and an average elevation above sea level of 1,299 feet. Within 10 miles also contains only modest variations in elevation (430 feet). Within 50 miles contains significant variations in elevation (682 feet).
The area within 2 miles of Grand Rapids is covered by trees (44%) and artificial surfaces (43%), within 10 miles by trees (74%) and water (12%), and within 50 miles by trees (74%) and herbaceous vegetation (14%).
This report illustrates the typical weather in Grand Rapids, 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 Grand Rapids.
For each station, the records are corrected for the elevation difference between that station and Grand Rapids 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 Grand Rapids is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Grand Rapids and a given station.
The stations contributing to this reconstruction are: Grand Rapids/Itasca County Airport-Gordon Newstrom Field (97%, 3.3 kilometers, southeast), Longville Municipal Airport (1.6%, 58 kilometers, southwest), and Bigfork Municipal Airport (1.5%, 61 kilometers, north).
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for aiports and weather stations are provided by AskGeo.com .