Olympia Armory · Photo: Upstateherd · CC BY-SA 4.0Olympia reaches 100° on about 15 days a year, more than 93% of U.S. towns
January nights here settle around 35°. Seasons differ by 58°, from the coldest nights to the warmest afternoons. Winters are mild: January nights here are milder than in 80% of U.S. towns. Radiators earn their keep from December to February, the months that average under 50°.
A year in Olympia at a glance
Each month’s typical high and low, and what it brings.
What stands out about Olympia’s climate
Compared with towns across the U.S., with Olympia’s place in South Carolina beside it.
What a year in Olympia feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 229 frost-free days a year
In half of years the last 32° night comes by March 25 and the first by November 7. Day counts come from NOAA’s station at Columbia Univ Of Sc, SC, 1.4 miles from the town’s center, at about the same height; frost dates and degree days from Columbia, SC, 5 miles away.
The 2023 USDA map puts Olympia’s center in zone 8b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 18°. 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 1 inches of snow a winter
Snow, measured at Columbia, SC, falls mostly in January. Precipitation (rain plus melted snow) adds up to 45 inches a year; June is the wettest month and November the driest. Rain or snow falls on about 109 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Olympia
53% of the work is heating. Months averaging under 55° run from November 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 Columbia, SC.
Living with Olympia’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
229 frost-free days in zone 8b. The last frost comes by Mar 25 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 7.
Months with highs of 62–84° and lows of 40° or more: March, April, October and November. 5.4 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Olympia from natural hazards, river flooding is the largest share (58%); heat waves, cold waves, winter storms and ice storms together are 12%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Olympia and its neighbors
Every town next door is within a degree of Olympia in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Olympia’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Olympia, SC | 35° | 93° | 45" | 1.2" |
| Sulphur Springs, TX | 34° | 94° | 45" | 1.6" |
| Durant, OK | 32° | 94° | 43" | 2.0" |
| McRae-Helena, GA | 38° | 93° | 47" | 0.1" |
| Clearlake, CA | 35° | 93° | 40" | 0.4" |
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 Olympia averaged 1.1° warmer than the 1900s. The biggest change is in February (+1.8°).
A smaller shift than in 69% 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 Olympia compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Olympia’s place among South Carolina’s.
Olympia weather by month
Highs, lows and precipitation from NOAA’s grid at Olympia’s center; snow, wet days and snow on the ground from Columbia, SC. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 57° | 35° | 3.7" | 0.6" | 10 | 1 | 40° – 52° |
| February | 61° | 38° | 3.4" | 0.4" | 9 | 0 | 42° – 59° |
| March | 69° | 44° | 3.8" | 0.1" | 9 | 0 | 50° – 65° |
| April | 77° | 51° | 2.9" | 0.0" | 8 | 0 | 60° – 69° |
| May | 84° | 60° | 3.4" | 0.0" | 9 | 0 | 68° – 77° |
| June | 90° | 68° | 4.8" | 0.0" | 11 | 0 | 74° – 83° |
| July | 93° | 72° | 4.7" | 0.0" | 12 | 0 | 79° – 86° |
| August | 91° | 71° | 4.8" | 0.0" | 10 | 0 | 78° – 86° |
| September | 86° | 65° | 4.1" | 0.0" | 8 | 0 | 72° – 80° |
| October | 77° | 53° | 3.2" | 0.0" | 7 | 0 | 61° – 70° |
| November | 67° | 42° | 2.8" | 0.0" | 7 | 0 | 50° – 60° |
| December | 59° | 37° | 3.7" | 0.1" | 9 | 0 | 38° – 58° |
| Year | 76° | 53° | 45.3" | 1.2" | 109 | 1 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 38° to 58°. July is the most reliable, staying within 7°.
Where Olympia’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 Olympia’s center.
- Snow: Columbia, SC.
- Frost dates, heating and cooling: Columbia, SC, 5 miles away.
- Freezing nights, 90° and 100° days: Columbia Univ Of Sc, SC, 1.4 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 Olympia’s climate
What is the weather like in Olympia?
A typical July afternoon reaches 93°, a January night drops to 35°, and about 1 inches of snow falls in a normal winter. Milder January nights than 80% of U.S. towns; hotter July afternoons than 91% of U.S. towns.
How cold does it get in Olympia in winter?
January nights average 35°. About 33 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 40°.
How much snow does Olympia get?
About 1.2 inches in a normal winter at Columbia, SC, most of it in January, with snow on the ground about 1 days a year.
How hot does it get in Olympia?
July, with a typical high of 93° and a low of 72°. About 108 days a year reach 90° and 15 reach 100° (Columbia, SC).
When is the first and last frost in Olympia?
In half of years the last spring frost (32°) comes by March 25 and the first fall frost by November 7, about 229 frost-free days, at Columbia, SC.
What growing zone is Olympia in?
Zone 8b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 18°.
What is the best time of year to visit Olympia?
By one simple rule (highs of 62–84° and lows of 40° or more), March, April, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Olympia getting warmer?
Yes: 1991–2020 averaged 1.1° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 69% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Olympia.
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.