Historical weather data, all-time temperature records, and monthly climate averages for Ottawa, KS. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Ottawa sits right in that unpredictable Kansas spring zone — expect something near 63° for a high and 39° overnight, but 130 years of history show the date can swing wildly, from a bitter 11° in 1920 to a shirt-sleeve 86° in 2000. There's about a 1-in-4 chance of rain, though snow is essentially off the table.
Ottawa's weather résumé is not for the faint of heart — 118° in July 1954 and -28° in February 1905 represent a 146-degree swing between the all-time extremes. August 2019 added an exclamation point when 8.45 inches of rain fell in a single day.
Ottawa runs hot and stormy in summer, with late July averaging a 92° high and the wettest stretch arriving in early June at over an inch of rain per week. Winters are cold but short on warmth, with early January highs barely cracking 40°. If you're planning a visit, May and September offer the most comfortable middle ground.