Buck's Upper Mill Farm · Photo: Pubdog · Public domainPrecipitation in Red Hill tops that of 88% of U.S. towns: 52 inches a year
On a normal July day the thermometer tops out near 90°. From frosty January to warm July, readings climb 54°. Winters are mild: January nights here are milder than in 82% of U.S. towns. Keep the boiler serviced for the months from December to February, which average under 50°.
A year in Red Hill at a glance
Each month’s typical high and low, and what it brings.
What stands out about Red Hill’s climate
Compared with towns across the U.S., with Red Hill’s place in South Carolina beside it.
What a year in Red Hill feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 254 frost-free days a year
In half of years the last 32° night comes by March 15 and the first by November 22. Frost and day counts come from NOAA’s station at Conway, SC, 4 miles from the town’s center, at about the same height.
The 2023 USDA map puts Red Hill’s center in zone 8b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 17°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 52 inches of rain a year
August is the wettest month and April the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Red Hill
52% of the work is heating. Months averaging under 55° run from December through February.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Conway, SC.
Living with Red Hill’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
254 frost-free days in zone 8b. The last frost comes by Mar 15 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 22.
Months with highs of 62–84° and lows of 40° or more: March, April, May, September, October and November. 18 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Red Hill from natural hazards, hurricanes are the largest share (64%); heat waves, cold waves, winter storms and ice storms together are 6%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Red Hill and its neighbors
Every town next door is within a degree of Red Hill in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Red Hill averaged 0.9° warmer than the 1900s. The biggest change is in December (+2.1°).
A smaller shift than in 86% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Red Hill compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Red Hill’s place among South Carolina’s.
Red Hill weather by month
Highs, lows and precipitation from NOAA’s grid at Red Hill’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 58° | 36° | 3.5" | 41° – 52° |
| February | 61° | 38° | 3.2" | 42° – 57° |
| March | 67° | 44° | 3.6" | 49° – 63° |
| April | 75° | 51° | 3.2" | 59° – 67° |
| May | 82° | 60° | 4.0" | 67° – 75° |
| June | 87° | 68° | 5.0" | 73° – 82° |
| July | 90° | 71° | 6.0" | 79° – 83° |
| August | 88° | 71° | 6.4" | 77° – 84° |
| September | 84° | 65° | 6.1" | 72° – 79° |
| October | 76° | 54° | 4.1" | 61° – 71° |
| November | 68° | 44° | 3.2" | 51° – 61° |
| December | 61° | 38° | 3.8" | 39° – 60° |
| Year | 75° | 53° | 51.9" |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 39° to 60°. July is the most reliable, staying within 5°.
Where Red Hill’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Red Hill’s center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Conway, SC, 4 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Red Hill’s climate
What is the weather like in Red Hill?
A typical July afternoon reaches 90°, a January night drops to 36°. Milder January nights than 82% of U.S. towns; hotter July afternoons than 78% of U.S. towns.
How cold does it get in Red Hill in winter?
January nights average 36°. About 39 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 41°.
How hot does it get in Red Hill?
July, with a typical high of 90° and a low of 71°. About 58 days a year reach 90° and 2 reach 100° (Conway, SC).
When is the first and last frost in Red Hill?
In half of years the last spring frost (32°) comes by March 15 and the first fall frost by November 22, about 254 frost-free days, at Conway, SC.
What growing zone is Red Hill in?
Zone 8b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 17°.
What is the best time of year to visit Red Hill?
By one simple rule (highs of 62–84° and lows of 40° or more), March, April, May, September, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Red Hill getting warmer?
Yes: 1991–2020 averaged 0.9° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 86% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Red Hill.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.