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Will it freeze in Knoxville in the next 7 nights?
No overnight lows at or below 32°F are forecast in Knoxville during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 50°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 50°F Above 36°F · Partly Cloudy
- Fri, Nov 6 45°F Above 36°F · Mostly Cloudy
- Sat, Nov 7 38°F Above 36°F · Partly Cloudy
- Sun, Nov 8 38°F Above 36°F · Partly Cloudy
- Mon, Nov 9 40°F Above 36°F · Partly Cloudy
- Tue, Nov 10 41°F Above 36°F · Partly Cloudy
- Wed, Nov 11 42°F Above 36°F · Partly Cloudy
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 Knoxville
The median first fall hard-freeze date (28°F) is November 6, from NOAA’s 1991–2020 Climate Normals at Knoxville Experiment Station. 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 9 · Apr 24 · May 10 | Oct 7 · Oct 19 · Nov 1 | 178 days |
| 32°F freeze | Mar 26 · Apr 11 · Apr 29 | Oct 13 · Oct 28 · Nov 9 | 198 days |
| 28°F hard freeze | Mar 13 · Mar 31 · Apr 16 | Oct 24 · Nov 6 · Nov 20 | 221 days |
Average high temperature by month
1991–2020 normals at Knoxville Experiment Station
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 Knoxville, TN come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Knoxville Experiment Station (station USC00404946, elevation 830 ft), 5.0 mi from Knoxville. 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 Knoxville
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Alcoa, TN | 11 mi | Apr 1 | Nov 2 |
| Clinton, TN | 13 mi | Mar 31 | Nov 4 |
| Farragut, TN | 14 mi | Apr 5 | Nov 1 |
| Maryville, TN | 16 mi | Apr 1 | Nov 2 |
| Oak Ridge, TN | 19 mi | Apr 5 | Nov 1 |
| Sevierville, TN | 21 mi | Apr 6 | Oct 29 |
| Lenoir City, TN | 22 mi | Apr 5 | Nov 1 |
| Pigeon Forge, TN | 25 mi | Apr 17 | Oct 25 |
| Jefferson City, TN | 28 mi | Apr 24 | Oct 17 |
| Loudon, TN | 28 mi | Apr 5 | Nov 1 |
Frequently asked questions
When is the last frost in Knoxville?
On average, the last spring frost (32°F) in Knoxville is around April 11. In about 1 year in 10 it comes after April 29, and in 9 years in 10 it comes after March 26.
When is the first frost in Knoxville?
The first fall frost (32°F) usually arrives around October 28. There’s a 10% chance of a freeze by October 13 and a 90% chance by November 9.
Can it frost in Knoxville 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 24.
What growing zone is Knoxville?
Knoxville is in USDA Plant Hardiness Zone 7b (average annual extreme minimum temperature 5 to 10°F), based on the 2023 USDA map for ZIP code 37916. See growing zones in Tennessee.
More: all Tennessee frost dates · Tennessee growing zones · UV index today in Knoxville · frost vs. freeze