Historical weather data, all-time temperature records, and monthly climate averages for Johnson, TN. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Johnson, TN sits right in the swing of spring — historically averaging a 65° high and 38° low across 103 years of records. There's a 42% chance of rain today, though snow is nearly off the table at just 2%. The date's range is wild, though: 87° as recently as 2025, and a brutal 20° back in 1944.
Johnson, TN has seen it all over 131 years of record-keeping — from a scorching 105° in July 1898 to a bone-snapping -21° in January 1985, a swing of 126 degrees. A single August day in 2012 dumped 4.05 inches of rain, and a March 1936 storm buried the area under 20.8 inches of snow.
Johnson runs warmest from mid-July through mid-August, with average highs peaking at 87°, while mid-January is the coldest stretch at just 46°. If you're watching your umbrella, early July is the wettest week of the year, averaging 1.27 inches. Spring and fall offer the most comfortable windows, with April and October both averaging highs in the upper 60s to low 70s.