Average Weather in Granite Falls Minnesota, United States
In Granite Falls, the summers are long and warm; 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 7°F to 82°F and is rarely below -14°F or above 91°F.
Based on the tourism score, the best time of year to visit Granite Falls for warm-weather activities is from mid June to late August.
The warm season lasts for 4.1 months, from May 16 to September 20, with an average daily high temperature above 71°F. The hottest day of the year is July 18, with an average high of 82°F and low of 61°F.
The cold season lasts for 3.4 months, from November 26 to March 5, with an average daily high temperature below 35°F. The coldest day of the year is January 15, with an average low of 7°F and high of 24°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
Talghar, Kazakhstan (6,340 miles away); Jiayuguan, China (6,534 miles); and Hohhot, China (6,293 miles) are the far-away foreign places with temperatures most similar to Granite Falls (view comparison).
In Granite Falls, 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 Granite Falls begins around June 9 and lasts for 4.2 months, ending around October 14. On July 28, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 75% of the time, and overcast or mostly cloudy 25% of the time.
The cloudier part of the year begins around October 14 and lasts for 7.8 months, ending around June 9. On February 6, the cloudiest day of the year, the sky is overcast or mostly cloudy 58% of the time, and clear, mostly clear, or partly cloudy 42% 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 Granite Falls varies significantly throughout the year.
The wetter season lasts 5.5 months, from April 12 to September 28, with a greater than 23% chance of a given day being a wet day. The chance of a wet day peaks at 40% on June 12.
The drier season lasts 6.5 months, from September 28 to April 12. The smallest chance of a wet day is 6% on January 15.
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 Granite Falls changes throughout the year.
Rain alone is the most common for 8.6 months, from March 7 to November 23. The highest chance of a day with rain alone is 40% on June 12.
Snow alone is the most common for 3.4 months, from November 23 to March 7. The highest chance of a day with snow alone is 6% on December 9.
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. Granite Falls experiences significant seasonal variation in monthly rainfall.
The rainy period of the year lasts for 8.5 months, from March 5 to November 22, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around June 17, with an average total accumulation of 3.8 inches.
The rainless period of the year lasts for 3.5 months, from November 22 to March 5. The least rain falls around January 25, 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. Granite Falls experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 5.9 months, from October 29 to April 26, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around March 4, with an average total liquid-equivalent accumulation of 0.4 inches.
The snowless period of the year lasts for 6.1 months, from April 26 to October 29. 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 Granite Falls varies significantly over the course of the year. In 2018, the shortest day is December 21, with 8 hours, 47 minutes of daylight; the longest day is June 21, with 15 hours, 36 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:35 AM on June 15, and the latest sunrise is 2 hours, 28 minutes later at 8:03 AM on November 3. The earliest sunset is at 4:41 PM on December 10, and the latest sunset is 4 hours, 31 minutes later at 9:12 PM on June 26.
Daylight saving time (DST) is observed in Granite Falls 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
Granite Falls experiences significant seasonal variation in the perceived humidity.
The muggier period of the year lasts for 3.0 months, from June 12 to September 14, during which time the comfort level is muggy, oppressive, or miserable at least 9% of the time. The muggiest day of the year is July 20, with muggy conditions 37% of the time.
The least muggy day of the year is December 9, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
The average hourly wind speed in Granite Falls experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 8.4 months, from September 21 to June 1, with average wind speeds of more than 10.7 miles per hour. The windiest day of the year is April 8, with an average hourly wind speed of 12.9 miles per hour.
The calmer time of year lasts for 3.6 months, from June 1 to September 21. The calmest day of the year is July 31, with an average hourly wind speed of 8.5 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Granite Falls varies throughout the year.
The wind is most often from the north for 3.9 months, from January 9 to May 7, with a peak percentage of 36% on April 2. The wind is most often from the south for 6.2 months, from May 7 to November 12, with a peak percentage of 42% on August 27. The wind is most often from the west for 1.9 months, from November 12 to January 9, with a peak percentage of 34% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Granite Falls 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 Granite Falls for general outdoor tourist activities is from mid June to late August, with a peak score in the first 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 Granite Falls for hot-weather activities is from early July to early 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 Granite Falls typically lasts for 5.2 months (156 days), from around April 28 to around October 1, rarely starting before April 10 or after May 17, and rarely ending before September 13 or after October 20.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Granite Falls should appear around April 24, only rarely appearing before April 11 or after May 10.
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 21, with an average daily incident shortwave energy per square meter above 6.0 kWh. The brightest day of the year is July 8, with an average of 7.1 kWh.
The darker period of the year lasts for 3.4 months, from October 30 to February 11, with an average daily incident shortwave energy per square meter below 2.6 kWh. The darkest day of the year is December 20, with an average of 1.5 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Granite Falls are 44.810 deg latitude, -95.546 deg longitude, and 1,020 ft elevation.
The topography within 2 miles of Granite Falls contains only modest variations in elevation, with a maximum elevation change of 187 feet and an average elevation above sea level of 965 feet. Within 10 miles also contains only modest variations in elevation (220 feet). Within 50 miles contains only modest variations in elevation (1,043 feet).
The area within 2 miles of Granite Falls is covered by cropland (69%) and trees (14%), within 10 miles by cropland (95%), and within 50 miles by cropland (94%).
This report illustrates the typical weather in Granite Falls, 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 Granite Falls.
For each station, the records are corrected for the elevation difference between that station and Granite Falls 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 Granite Falls is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Granite Falls and a given station.
The stations contributing to this reconstruction are: Granite Falls Municipal Airport/Lenzen-Roe Memorial Field (79%, 6 kilometers, south); Montevideo-Chippewa County Airport (13%, 22 kilometers, northwest); Olivia Regional Airport (5.0%, 41 kilometers, east); and Willmar Municipal Airport-John L Rice Field (4.0%, 47 kilometers, northeast).
Time zones for aiports and weather stations are provided by AskGeo.com .