Average Weather in September in Grand Rapids Michigan, United States. In Grand Rapids, the summers are warm and partly cloudy and the winters are freezing, dry, windy, and mostly cloudy. 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. 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. There are 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Grand Rapids. US Climate Data; Michigan; Grand Rapids; Monthly Averages. In Grand Rapids, the summers are warm and partly cloudy and the winters are freezing, dry, windy, and mostly cloudy. Click on each chart for more information. : Days with precipitation - Hours sun. The percentage of time spent in various temperature bands. On January 7, the cloudiest day of the year, the sky is overcast or mostly cloudy 69% of the time, and clear, mostly clear, or partly cloudy 31% of the time. Daily low temperatures decrease by 10°F, from 58°F to 48°F, rarely falling below 37°F or exceeding 69°F. Grand Rapids experiences significant seasonal variation in monthly rainfall. The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands. Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. In Grand Rapids, there are 4 comfortable months with high temperatures in the range of 70-85°. Within 50 miles contains only modest variations in elevation (787 feet). On August 6, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 67% of the time, and overcast or mostly cloudy 33% of the time. From hot summer days to brisk winter evenings, here are some tips to fill your suitcase with the right gear. Grand Rapids is located near a large body of water (e.g., ocean, sea, or large lake). Average Rainfall for Grand Rapids Snow alone is the most common for 1.9 months, from December 20 to February 17. The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than. The smallest chance of a wet day is 17% on February 8. Mar. The most snow falls during the 31 days centered around January 8, with an average total liquid-equivalent accumulation of 0.7 inches. The muggier period of the year lasts for 3.6 months, from May 30 to September 18, during which time the comfort level is muggy, oppressive, or miserable at least 9% of the time. Daytime maximum temperatures average around a comfortable 26°C (78°F), whilst at night 12°C (54°F) is normal. 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. Share: Get the Long Range Weather for Your Location ... and early to mid-March. Jan. 26°F-3°C. Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database . Station Data. 21°F-6°C. The topography within 2 miles of Grand Rapids contains only modest variations in elevation, with a maximum elevation change of 197 feet and an average elevation above sea level of 666 feet. The thin dotted line is the corresponding average liquid-equivalent snowfall. 14°F-10°C. Coming off a wet spring, Grand Rapidsâ summer deficit was 0.95 inches. 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