Historical weather data, all-time temperature records, and monthly climate averages for Fort Mill, SC. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Fort Mill is a transitional day, with average highs of 71° and lows of 47° across 126 years of records. The date has seen a 64-degree swing in extremes — from a scorching 90° in 2010 down to a bitter 26° back in 1944. There's about a 1-in-4 chance of rain today, but snow is essentially off the table.
Fort Mill's weather has some teeth to it — the all-time high hit a brutal 108° in July 1930, while the coldest day on record bottomed out at -4° in January 1985. On the wet side, a single day in May 2016 dropped 6.21 inches of rain, and a January 1988 snowstorm buried the area under a foot of snow.
Fort Mill runs hot in summer, with mid-July average highs peaking at 91° — and that's also when rainfall is heaviest, averaging over an inch a week. If you prefer cooler temps, early January is your window, with highs only reaching the low 50s. Spring and fall offer the sweet spot, with April and October both averaging a comfortable 74°.