Historical weather data, all-time temperature records, and monthly climate averages for Plymouth, IN. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Plymouth runs cool, with an average high of just 53° and a low of 33° across 37 years of data. It's a date with a wide range — temperatures have swung from a frigid 16° in 1995 to a shirt-sleeve 75° in 1997. There's a coin-flip chance of rain (49%), with a small but real 5% shot at snow.
Plymouth's weather has serious range — from a brutal -22° in January 1994 to a scorching 105° in July 2012, a swing of 127 degrees. A single August day in 1990 dropped 5.3 inches of rain, and a January storm in 1999 buried the town under 19 inches of snow. This is a place that doesn't do mild extremes.
Summer is the sweet spot, with mid-July highs averaging 85° — also the wettest stretch of the year at 1.42 inches per week. Winter bites hard; January highs barely clear freezing at 29°. If you're planning a visit, May through September offers the most comfortable temperatures, with spring and fall serving as unpredictable shoulder seasons.