Historical weather data, all-time temperature records, and monthly climate averages for Valparaiso, IN. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Valparaiso lands in that classic late-winter limbo — historically, highs average just 55° with lows dipping to 33°. The date has seen a 56-degree swing over the years, from a frigid 20° in 2016 to a shirt-sleeve 76° in 2021. Snow is essentially off the table, but there's still a 36% chance you'll see some rain.
Valparaiso's weather has serious range — from a brutal -20° in January 1999 to a scorching 101° in July 2011, that's a 121-degree spread over the station's history. The wettest single day on record dumped 3.82 inches in late September 2019, a reminder that fall can hit hard here too.
Summer is the sweet spot, with highs peaking around 85° during the third week of July — but it's a short window before the slide back toward January's average high of just 30°. If rain is your concern, late spring is the time to watch: the week of May 7–13 is historically the wettest, averaging over an inch of precipitation. For the best weather, aim for June through August.