Historical weather data, all-time temperature records, and monthly climate averages for Delaware, OH. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Delaware sits right in that transitional zone — expect a high near 57° and a low around 36°, though history shows wild swings are possible. This date has seen an 82° scorcher back in 1988 and a brutal 17° low in 1995. Rain is a coin flip at 34%, but snow is nearly off the table at just 1%.
Delaware has seen genuine extremes over its 109 years of records — from a staggering 109° on July 14, 1936 to a bone-chilling -23° on January 10, 1982, a swing of 132 degrees. A single day dumped 4.82 inches of rain in June 1997, and a December 2004 storm buried the area under 16 inches of snow.
Summer is the sweet spot, with highs peaking around 85° during the second week of July and comfortable warmth from May through September. If you're cold-averse, avoid mid-January, when average highs barely crack 34°. June and early July bring the most rainfall, averaging over an inch a week — keep that in mind for outdoor plans.