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Will it freeze in Irmo in the next 7 nights?
No overnight lows at or below 32°F are forecast in Irmo during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 64°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM EST to Fri, Nov 6, 6:00 AM EST.
No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.
- Tonight 64°F Above 36°F · Chance Showers And Thunderstorms
- Fri, Nov 6 53°F Above 36°F · Partly Cloudy
- Sat, Nov 7 44°F Above 36°F · Mostly Clear
- Sun, Nov 8 43°F Above 36°F · Mostly Clear
- Mon, Nov 9 43°F Above 36°F · Mostly Clear
- Tue, Nov 10 45°F Above 36°F · Partly Cloudy
- Wed, Nov 11 46°F Above 36°F · Mostly Clear
Overnight lows from the National Weather Service forecast for this location. This covers the available forecast window, not the first freeze of the whole season. Frost can form above 32°F on clear, calm nights.
Frost and freeze probabilities
Freeze dates shift from year to year. Spring percentages describe the chance of a freeze after the stated date; fall percentages describe the chance of a freeze by that date. The 10% spring date is the cautious one: a later freeze happens about 1 year in 10.
These dates describe historical probabilities, not this year’s forecast or the earliest and latest possible freezes. Different weather stations or probability thresholds can produce different published dates for the same city.
Average first hard freeze in Irmo
The median first fall hard-freeze date (28°F) is November 5, from NOAA’s 1991–2020 Climate Normals at Cedar Creek 2E. This is the 50% probability date, not a forecast for this year.
| Temperature | Last spring date 90% · 50% · 10% chance of a later freeze | First fall date 10% · 50% · 90% chance of an earlier freeze | Season |
|---|---|---|---|
| 36°F frost possible | Apr 7 · Apr 21 · May 4 | Oct 8 · Oct 20 · Nov 1 | 182 days |
| 32°F freeze | Mar 27 · Apr 10 · Apr 23 | Oct 15 · Oct 28 · Nov 8 | 201 days |
| 28°F hard freeze | Mar 9 · Mar 31 · Apr 14 | Oct 24 · Nov 5 · Nov 23 | 221 days |
Average high temperature by month
1991–2020 normals at Cedar Creek 2E
Average low temperature by month
Months with lows near or below freezing carry frost risk
Where these frost dates come from
The frost dates for Irmo, SC come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Cedar Creek 2E (station USC00381479, elevation 338 ft), 11 mi from Irmo. Local conditions (valleys, hilltops, distance to water, city heat) can shift frost dates by days or weeks. The hardiness zone is from the 2023 USDA Plant Hardiness Zone Map (USDA ARS and Oregon State University PRISM). See our methodology.
Frost dates near Irmo
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Lexington, SC | 7.5 mi | Mar 25 | Nov 7 |
| West Columbia, SC | 9.3 mi | Mar 25 | Nov 7 |
| Forest Acres, SC | 14 mi | Mar 16 | Nov 16 |
| Blythewood, SC | 14 mi | Apr 10 | Oct 28 |
| Cayce, SC | 14 mi | Mar 13 | Nov 19 |
| Columbia, SC | 17 mi | Mar 22 | Nov 15 |
| Batesburg-Leesville, SC | 23 mi | Mar 20 | Nov 18 |
| Newberry, SC | 26 mi | Mar 31 | Nov 7 |
| Camden, SC | 35 mi | Apr 4 | Nov 4 |
| Chester, SC | 42 mi | Apr 3 | Nov 2 |
Frequently asked questions
When is the last frost in Irmo?
On average, the last spring frost (32°F) in Irmo is around April 10. In about 1 year in 10 it comes after April 23, and in 9 years in 10 it comes after March 27.
When is the first frost in Irmo?
The first fall frost (32°F) usually arrives around October 28. There’s a 10% chance of a freeze by October 15 and a 90% chance by November 8.
Can it frost in Irmo after the last frost date?
Yes. Frost can form on clear, calm nights even when the air stays above 32°F. Temperatures of 36°F or lower, cold enough for frost on exposed plants, have a 50% chance of occurring after April 21.
What growing zone is Irmo?
Irmo is in USDA Plant Hardiness Zone 8b (average annual extreme minimum temperature 15 to 20°F), based on the 2023 USDA map for ZIP code 29212. See growing zones in South Carolina.
More: all South Carolina frost dates · South Carolina growing zones · frost vs. freeze