Historical weather data, all-time temperature records, and monthly climate averages for Newton, IA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Newton runs cool and dry, with an average high of 56° and just a 23% chance of precipitation. But the date has seen some wild swings — a 84° scorcher back in 1991, and a bitter 13° low as recently as 2018. Spring here keeps you guessing.
Newton's all-time records tell the story of a classic Iowa climate with no shortage of extremes — from a suffocating 106° in July 1894 to a bone-crushing -31° in January 1982, a swing of 137 degrees. The wettest single day on record dropped 5.37 inches in September 2018, and a March 2004 snowstorm buried the town under 15 inches.
Newton's summer peaks in mid-July with average highs of 87°, while early January bottoms out at a frigid 28°. If you're chasing the wet season, mid-June is when storms peak with over an inch of precipitation per week on average. Spring and fall offer the most moderate stretch, with April and October highs in the 60s.