Historical weather data, all-time temperature records, and monthly climate averages for Old Jamestown, MO. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Old Jamestown runs mild on average, with highs near 61° and lows around 41° across 88 years of records. The date has seen wild swings though — from a balmy 85° back in 1942 to a bitter 23° low in 1975. There's a 40% chance of rain today, so keep an umbrella handy.
Old Jamestown plays for keeps when the weather gets extreme. The all-time high of 115° in July 1954 and a bone-chilling -18° in January 1985 represent a 133-degree spread between the worst of summer and winter. A single storm dropped 8.64 inches of rain on July 26, 2022 — a reminder that this corner of Missouri doesn't do anything halfway.
Summer is the main event here, with highs averaging 90° during the peak week of July 16–22 and staying in the upper 80s through August. If you're cold-averse, steer clear of mid-January, when highs barely crack 38°. Late June through early July is the wettest stretch of the year, so summer travel plans should account for some serious thunderstorm potential.