Historical weather data, all-time temperature records, and monthly climate averages for Dubuque, IA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Dubuque lands right in that transitional sweet spot — expect a high near 53° and a low around 34°, with about a 4-in-10 chance of rain. The date has a wide range of moods on record: a balmy 79° back in 1942, and a brutal 16° low in 1982. No snow expected today, though.
Dubuque plays no games when the extremes hit. The city has baked at 108° (July 1995) and frozen at -37° (January 2009) — a jaw-dropping 145-degree spread across its recorded history. Single-day rainfall has topped 8.8 inches, and one January storm in 1996 dumped 13 inches of snow.
Summer is Dubuque's headline act, with highs peaking around 84–85° in mid-July and the wettest stretch arriving in mid-June. Winters are genuinely cold — January averages just 28° for a high — so plan accordingly if you're visiting between December and February. Spring and fall offer the most comfortable windows, with April climbing to a 59° average high and October holding at 63°.