Great Falls, SC climate
Great Falls has mild winters and warm summers. A typical July afternoon reaches 92°, a January night drops to 32°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Great Falls feels like
Winter
Spring
Summer
Fall
Great Falls weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 54° | 32° | 3.6" | 0.3" | 7 | 0 | 38° – 49° |
| February | 58° | 35° | 3.1" | 0 | 7 | 0 | 39° – 56° |
| March | 66° | 41° | 3.8" | 0 | 8 | 0 | 47° – 62° |
| April | 75° | 49° | 3.0" | 0 | 7 | 0 | 58° – 67° |
| May | 82° | 57° | 3.0" | 0 | 6 | 0 | 65° – 75° |
| June | 88° | 66° | 3.8" | 0 | 8 | 0 | 72° – 81° |
| July | 92° | 70° | 3.9" | 0 | 9 | 0 | 78° – 85° |
| August | 89° | 69° | 4.1" | 0 | 8 | 0 | 76° – 85° |
| September | 84° | 62° | 3.7" | 0 | 6 | 0 | 70° – 78° |
| October | 74° | 50° | 2.9" | 0 | 5 | 0 | 59° – 67° |
| November | 64° | 40° | 3.0" | 0 | 6 | 0 | 47° – 57° |
| December | 57° | 34° | 3.8" | 0.2" | 8 | 0 | 36° – 56° |
| Year | 74° | 50° | 41.6" | 0.5" | 84 | 0 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Great Falls
Great Falls gets 42 inches of rain and melted snow a year. August is the wettest month and October the driest. Rain or snow falls on about 84 days a year.
About 221 frost-free days a year
In half of years the last 32° night comes by March 31 and the first one by November 6. That leaves about 221 frost-free days for gardens, longer than 82% of U.S. towns.
Heating and cooling a home in Great Falls
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Great Falls, 64% of that work is heating and 36% is cooling.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
How Great Falls compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Great Falls averaged 0.8° warmer than the 1900s. The biggest change is in December (+2.0°). The shift is smaller than in 82% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Great Falls’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 36° to 56°. July is the most reliable, staying within 7°.
Common questions about Great Falls’s climate
What is the coldest month in Great Falls?
January, with a typical high of 54° and a low of 32°.
What is the hottest month in Great Falls?
July, with a typical high of 92° and a low of 70°. About 62 days a year reach 90°.
How much snow does Great Falls get?
Almost none. A normal year brings 0.5 inches.
When is the first frost in Great Falls?
In half of years the first 32° night comes by November 6, and the last spring frost by March 31.
What is the rainiest month in Great Falls?
August, with 4.1 inches of rain and melted snow. The year totals 42 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Great Falls itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Great Falls, SC (1 mi, snow) and Winnsboro, SC (17 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.