Mount Pleasant, SC climate
Mount Pleasant has warm winters and warm summers, with plenty of rain. A typical July afternoon reaches 90°, a January night drops to 41°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decade4° warmer than normal today. The forecast high is 85°, and a typical Oct 1 in Mount Pleasant peaks around 81°.Live forecast: National Weather Service · Normal: NOAA 1991–2020
What a year in Mount Pleasant feels like
Winter
Spring
Summer
Fall
Mount Pleasant 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 | 59° | 41° | 3.3" | 0.2" | 9 | 0 | 45° – 55° |
| February | 62° | 43° | 3.1" | 0.1" | 9 | 0 | 45° – 60° |
| March | 68° | 49° | 3.4" | 0 | 8 | 0 | 53° – 65° |
| April | 75° | 56° | 3.3" | 0 | 8 | 0 | 60° – 69° |
| May | 81° | 65° | 3.1" | 0 | 8 | 0 | 69° – 77° |
| June | 87° | 72° | 5.4" | 0 | 12 | 0 | 74° – 83° |
| July | 90° | 75° | 5.9" | 0 | 13 | 0 | 81° – 85° |
| August | 89° | 74° | 6.4" | 0 | 13 | 0 | 79° – 84° |
| September | 84° | 70° | 5.4" | 0 | 10 | 0 | 75° – 82° |
| October | 77° | 60° | 4.5" | 0 | 7 | 0 | 65° – 73° |
| November | 68° | 50° | 2.8" | 0 | 7 | 0 | 54° – 65° |
| December | 62° | 44° | 3.1" | 0 | 9 | 0 | 43° – 63° |
| Year | 75° | 58° | 49.6" | 0.3" | 114 | 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 Mount Pleasant
Mount Pleasant gets 50 inches of rain and melted snow a year. August is the wettest month and November the driest. Rain or snow falls on about 114 days a year.
About 321 frost-free days a year
In half of years the last 32° night comes by February 4 and the first one by December 30. That leaves about 321 frost-free days for gardens, longer than 96% of U.S. towns.
Heating and cooling a home in Mount Pleasant
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Mount Pleasant, 40% of that work is heating and 60% is cooling, so air conditioning is the bigger bill.
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.
Mount Pleasant and its neighbors
Mount Pleasant borders 3 towns with climate data. January nights across them vary by 1.8°. Awendaw has the coldest January nights (39°) and Charleston the hottest July afternoons (90°). Mount Pleasant’s January low is 41° and its July high 90°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Mount Pleasant 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 Mount Pleasant averaged 1.4° warmer than the 1900s. The biggest change is in December (+2.6°). The shift is larger than in 62% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Mount Pleasant’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 43° to 63°. July is the most reliable, staying within 4°.
Common questions about Mount Pleasant’s climate
What is the coldest month in Mount Pleasant?
January, with a typical high of 59° and a low of 41°.
What is the hottest month in Mount Pleasant?
July, with a typical high of 90° and a low of 75°. About 25 days a year reach 90°.
How much snow does Mount Pleasant get?
Almost none. A normal year brings 0.3 inches.
When is the first frost in Mount Pleasant?
In half of years the first 32° night comes by December 30, and the last spring frost by February 4.
What is the rainiest month in Mount Pleasant?
August, with 6.4 inches of rain and melted snow. The year totals 50 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Mount Pleasant itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Charleston Intl Airport, SC (12 mi, snow) and Charleston City, SC (4 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.