Historical weather data, all-time temperature records, and monthly climate averages for Altoona, IA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Altoona runs the full gamut — this date has seen a balmy 85° back in 2011 and a teeth-chattering 12° low as recently as 2018. On average, expect a cool spring day with a high near 56° and a low dipping to 31°. There's a 31% chance of rain, though snow is a long shot at just 3%.
Altoona's weather has real range — the all-time high of 106° in August 1983 and a brutal -34° in February 1996 give this Iowa town a 140-degree spread between extremes. The wettest single day on record dumped 5.25 inches in June 1954, while a March 2004 storm buried the area under 12 inches of snow.
Summer is the sweet spot here, with highs averaging 87° during the warmest week of mid-July, while mid-January bottoms out around 28°. June is when to watch for heavy rain — the wettest stretch of the year averages 1.35 inches in a single week. If you're planning a visit, May through September offers the most comfortable conditions, with average highs ranging from 72° to 86°.