Historical weather data, all-time temperature records, and monthly climate averages for Ottumwa, IA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Ottumwa typically lands in that awkward spring transition zone — expect a high near 57° and a low around 35°. The date has swung wildly over 78 years of records, from a balmy 86° in 2000 to a bitter 18° back in 1982. There's about a 1-in-4 chance of rain today, with snow still a slim but real 4% possibility.
Ottumwa plays for keeps on both ends of the thermometer — the all-time high of 106° in July 2012 and the all-time low of -27° in February 1996 represent a staggering 133-degree spread. A single day in September 1992 dropped 5.32 inches of rain, and a February 1978 snowstorm buried the city under 15 inches in one shot.
Summers are genuinely hot here, with late July highs averaging 87° and the mercury capable of pushing well past 100°. Winters are cold and real — January and February average highs sit in the low-to-mid 30s. If rain is your concern, late June is the wettest stretch of the year, averaging over an inch of precipitation in a single week.