Historical weather data, all-time temperature records, and monthly climate averages for Greencastle, IN. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Greencastle sits squarely in the swing season — expect something around 60° for a high and 38° overnight, though the date has swung wildly from 85° back in 1988 to a brutal 18° low as recently as 2018. There's roughly a 4-in-10 chance of rain today, but snow is nearly off the table at just 2%.
Greencastle's weather history is not for the faint of heart — 132 years of data include a scorching 109° in July 1936 and a bone-cracking -25° in January 1994, a 134-degree swing between extremes. A single June day in 1957 dropped 8.74 inches of rain, and a March storm in 1996 buried the town under 19 inches of snow.
Summer is the main event here, with highs peaking around 87-88° in mid-July and a wet stretch in late June that averages over an inch of rain per week. Winters are cold but not brutal, with January highs hovering near 36°. If you're planning a visit, May through September delivers the warmest and most active weather, while January and February are the quietest and coldest months of the year.