Historical weather data, all-time temperature records, and monthly climate averages for Burlington, IA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Burlington lands right in the heart of spring's volatility — the thermometer has swung from 18° in 2018 to a shirt-sleeve 85° just five years later in 2023. Most years, expect a mild-ish day in the mid-50s with a one-in-four shot at some rain.
Burlington knows weather in full extremes: 105° blistering heat in July 2012 and a bone-cracking -26° in February 1996 — a 131-degree spread between its worst moments. June can get downright biblical too, as 5.55 inches of rain in a single day back in 2007 proves.
Summer is Burlington's sweet spot, with highs peaking around 86° the week of July 9–15, while January is brutally honest with average highs barely clearing 31°. If you're rain-averse, steer clear of late June — it's the wettest stretch of the year. Spring and fall offer a pleasant middle ground before the extremes take over.