We often get asked when is it safe to plant our annuals? When is it safe to do my spring planting? When is the date of the last frost in Knoxville, Maryville, Powell, Oak Ridge, Lenior City, Farragut or Karns, Tennessee?
These charts from the National Climatic Data Center do a great job of letting us know!
| Results for Knoxville, TN |
| Each winter, on average, your risk of frost is from October 23 through April 13.Almost certainly, however, you will receive frost from November 5 through March 29.You are almost guaranteed that you will not get frost from April 28 through October 8.Your frost-free growing season is around 193 days.
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Detailed station data* follows:
Oak Ridge Atdl, TN (Anderson county):
| Temperature |
10% |
20% |
30% |
40% |
50% |
60% |
70% |
80% |
90% |
| Spring 32° |
Apr 28 |
Apr 23 |
Apr 19 |
Apr 16 |
Apr 13 |
Apr 10 |
Apr 7 |
Apr 3 |
Mar 29 |
| Spring 28° |
Apr 16 |
Apr 10 |
Apr 6 |
Apr 2 |
Mar 30 |
Mar 26 |
Mar 23 |
Mar 18 |
Mar 12 |
| Spring 24° |
Apr 5 |
Mar 29 |
Mar 24 |
Mar 19 |
Mar 15 |
Mar 11 |
Mar 6 |
Mar 1 |
Feb 22 |
| Fall 32° |
Oct 8 |
Oct 13 |
Oct 17 |
Oct 20 |
Oct 23 |
Oct 26 |
Oct 29 |
Oct 31 |
Nov 5 |
| Fall 28° |
Oct 23 |
Oct 28 |
Oct 31 |
Nov 2 |
Nov 4 |
Nov 7 |
Nov 10 |
Nov 13 |
Nov 18 |
| Fall 24° |
Nov 4 |
Nov 9 |
Nov 13 |
Nov 16 |
Nov 20 |
Nov 23 |
Nov 26 |
Dec 1 |
Dec 6 |
|
Norris Evap Stn, TN (Anderson county):
| Temperature |
10% |
20% |
30% |
40% |
50% |
60% |
70% |
80% |
90% |
| Spring 32° |
May 9 |
May 3 |
Apr 29 |
Apr 25 |
Apr 21 |
Apr 18 |
Apr 14 |
Apr 10 |
Apr 4 |
| Spring 28° |
Apr 21 |
Apr 16 |
Apr 12 |
Apr 9 |
Apr 5 |
Apr 2 |
Mar 30 |
Mar 26 |
Mar 21 |
| Spring 24° |
Apr 11 |
Apr 5 |
Apr 1 |
Mar 28 |
Mar 25 |
Mar 22 |
Mar 18 |
Mar 14 |
Mar 8 |
| Fall 32° |
Oct 8 |
Oct 13 |
Oct 16 |
Oct 19 |
Oct 22 |
Oct 25 |
Oct 28 |
Oct 31 |
Nov 3 |
| Fall 28° |
Oct 15 |
Oct 21 |
Oct 26 |
Oct 30 |
Nov 2 |
Nov 5 |
Nov 9 |
Nov 14 |
Nov 20 |
| Fall 24° |
Nov 3 |
Nov 8 |
Nov 12 |
Nov 15 |
Nov 19 |
Nov 22 |
Nov 25 |
Nov 29 |
Dec 5 |
|
Lenoir City, TN (Loudon county):
| Temperature |
10% |
20% |
30% |
40% |
50% |
60% |
70% |
80% |
90% |
| Spring 32° |
Apr 25 |
Apr 19 |
Apr 16 |
Apr 12 |
Apr 10 |
Apr 7 |
Apr 3 |
Mar 31 |
Mar 25 |
| Spring 28° |
Apr 10 |
Apr 4 |
Mar 31 |
Mar 27 |
Mar 24 |
Mar 21 |
Mar 17 |
Mar 13 |
Mar 7 |
| Spring 24° |
Mar 29 |
Mar 22 |
Mar 16 |
Mar 12 |
Mar 8 |
Mar 3 |
Feb 27 |
Feb 21 |
Feb 14 |
| Fall 32° |
Oct 12 |
Oct 17 |
Oct 21 |
Oct 24 |
Oct 27 |
Oct 30 |
Nov 2 |
Nov 5 |
Nov 11 |
| Fall 28° |
Oct 30 |
Nov 3 |
Nov 6 |
Nov 9 |
Nov 12 |
Nov 14 |
Nov 17 |
Nov 21 |
Nov 26 |
| Fall 24° |
Nov 7 |
Nov 13 |
Nov 18 |
Nov 22 |
Nov 25 |
Nov 29 |
Dec 4 |
Dec 8 |
Dec 15 |
|
* This station data is available courtesy the National Climatic Data Center.
For each station, you will see a temperature along with a pile of percentage columns. Here’s how it works: The percent column tells you the probability that you will experience that row’s temperature on or before that date.
So, for example, in the Spring 32° row, if you have “Apr 15” under the 50% column, that means that you have a 50% chance of seeing frost on or before April 15th.
Another example. Say in the Fall 24° row, under 90%, you have Dec 1, then that means that you have a 90% chance of seeing 24 degrees on or before December 1st.
Empty cells indicate you have a less than 10% chance of ever seeing that temperature.
