USDA Hardiness Zone 7b
Frost Dates for 37890 — White Pine, Tennessee
NOAA 1991–2020 normals from Morristown WFO, TN (1,320 ft), 8 miles northwest.
Updated
In White Pine, the last spring frost (32°F) is around March 31 in half of years and has passed by April 18 in nine years out of ten. The first fall frost comes around November 4, as early as October 22 one year in ten, leaving a typical freeze-free season of 217 days (NOAA, Morristown WFO, TN).
- Last spring frost
- March 31
- First fall frost
- November 4
- Growing season
- 217 days
- Hardiness zone
- 7b
50% probability
50% probability
freeze-free, 50%
5 to 10°F (-15.0 to -12.2°C) coldest night
- First snow
- December 12
- Last snow
- March 9
- Winters with snow
- 96%
- Snow per year
- 10.2"
median, 1991–2020
median, 1991–2020
24 of 25 observed
NOAA normal
Frost risk by date in White Pine
Half of springs at Morristown WFO, TN see their last 32°F night by March 31; only one in ten is past it by March 14, and one in ten still has one after April 18. Planting tender crops after April 6 leaves a 30% risk of a frost on them, after April 12 20%, and after April 18 10%. The 18 days between the even-odds date and the one-in-ten date is wider than at 67% of the 144 Tennessee stations behind this site's ZIP pages.
In fall the first 32°F night comes by November 4 in half of years, as early as October 22 one year in ten, and holds off past November 18 one year in ten. A hard freeze of 28°F follows 10 days later, around November 14; in spring the one-in-ten date for 28°F is April 5, 13 days before the 32°F one. The freeze-free season lasts 217 days in a typical year, longer than at 85% of the 144 Tennessee stations; it reaches 242 days one year in ten and falls short of 195 one year in ten. On average 64 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 14 days longer, to about April 14, and return around October 26. Severe cold of 16°F or below comes in 97% of winters, usually between December 31 and February 6.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 29 | Apr 2 | Apr 6 | Apr 10 | Apr 14 | Apr 16 | Apr 21 | Apr 25 | May 2 |
| 32°F | Mar 14 | Mar 21 | Mar 25 | Mar 29 | Mar 31 | Apr 2 | Apr 6 | Apr 12 | Apr 18 |
| 28°F | Mar 2 | Mar 8 | Mar 13 | Mar 17 | Mar 21 | Mar 25 | Mar 28 | Mar 31 | Apr 5 |
| 24°F | Feb 13 | Feb 22 | Feb 27 | Mar 3 | Mar 7 | Mar 11 | Mar 15 | Mar 21 | Mar 27 |
| 20°F | Jan 29 | Feb 4 | Feb 11 | Feb 18 | Feb 23 | Feb 28 | Mar 4 | Mar 10 | Mar 17 |
| 16°F97% of yrs | Jan 12 | Jan 21 | Jan 28 | Feb 1 | Feb 6 | Feb 12 | Feb 18 | Feb 27 | Mar 8 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 13 | Oct 17 | Oct 21 | Oct 24 | Oct 26 | Oct 28 | Oct 31 | Nov 3 | Nov 7 |
| 32°F | Oct 22 | Oct 27 | Oct 31 | Nov 1 | Nov 4 | Nov 6 | Nov 9 | Nov 12 | Nov 18 |
| 28°F | Nov 1 | Nov 5 | Nov 8 | Nov 11 | Nov 14 | Nov 18 | Nov 22 | Nov 26 | Dec 2 |
| 24°F | Nov 10 | Nov 14 | Nov 19 | Nov 23 | Nov 26 | Dec 1 | Dec 4 | Dec 10 | Dec 19 |
| 20°F | Nov 20 | Nov 27 | Dec 2 | Dec 6 | Dec 11 | Dec 18 | Dec 24 | Dec 29 | Jan 5 |
| 16°F97% of yrs | Dec 4 | Dec 11 | Dec 20 | Dec 26 | Dec 31 | Jan 3 | Jan 8 | Jan 14 | Jan 22 |
Freeze probabilities 1991–2020 at Morristown WFO, TN, from NOAA NCEI U.S. Climate Normals. Where a temperature is reached in fewer than 99.5% of years, the dates describe only the years that reach it. Not a forecast.
Frost risk on any date in 37890 →Compare White Pine with another place →
Weather by month in White Pine
July is the warmest month at Morristown WFO, TN, averaging 86°F by day and 68°F at night; January is the coldest at 46°F and 29°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 49% of years.
Warmth for growing adds up to 4,318 growing degree days a year (base 50°F), fewer than at 65% of the 144 Tennessee stations. 38% of them (1,653) have built up by the end of June, and July adds the most, 823. Precipitation totals 47.5 inches a year, most in July (5.0") and least in October (2.7"); May to September bring 40% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 46 | 29 | 4.4 | 100% | 19 | 20 |
| Feb | 50 | 32 | 4.5 | 100% | 13 | 28 |
| Mar | 59 | 40 | 4.4 | 98% | 8 | 113 |
| Apr | 69 | 48 | 4.5 | 49% | 1 | 279 |
| May | 76 | 56 | 3.6 | 1% | 0 | 508 |
| Jun | 83 | 64 | 4.3 | 0% | 0 | 705 |
| Jul | 86 | 68 | 5.0 | 0% | 0 | 823 |
| Aug | 85 | 67 | 3.0 | 0% | 0 | 804 |
| Sep | 80 | 61 | 3.1 | 0% | 0 | 612 |
| Oct | 70 | 50 | 2.7 | 35% | 1 | 314 |
| Nov | 58 | 39 | 3.6 | 99% | 7 | 85 |
| Dec | 49 | 33 | 4.4 | 100% | 16 | 27 |
Monthly normals 1991–2020 at Morristown WFO, TN (1,320 ft), NOAA NCEI. "32°F night": chance of at least one in the month. GDD: growing degree days, base 50°F.
Compared with the next station
The nearest other station, Morristown Radio Wcrk, TN, 8 miles north of White Pine, has a last frost 10 days later (April 10), a first frost 7 days earlier (October 28), a season 16 days shorter.
When it snows in White Pine, Tennessee
The first measurable snow (0.1 inch or more) in White Pine usually arrives around December 12, and the last of the season around March 9. Those are the middle dates across the winters of 1991–2020 at Morristown WFO, TN, 8.1 miles away: half of years saw snow earlier, half later. Snow fell in 96% of those winters. The last 32°F night of spring typically comes 22 days after the last snow.
Planting calendar for 37890
| When | What to do |
|---|---|
| January 20 – February 3 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| February 3 – February 17 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| March 3 – March 17 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| March 31 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by August 12 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 21 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| November 4 onward | Plant garlic, mulch beds, lift tender bulbsGarlic wants a cold spell; bare soil loses structure over winter. |
The weeks before and after the 50% dates are general rules of thumb, not NOAA figures; a seed packet gives the timing for each variety.
Where these figures come from
ZIP 37890 is 8 miles from Morristown WFO, TN, which stands at 1,320 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station; its figures are presented in full for 37877 (Talbott). The 2023 USDA Plant Hardiness Zone Map lists ZIP 37890 in zone 7b, the band where the coldest night of the year averaged 5 to 10°F (-15.0 to -12.2°C) over 1991–2020; a zone describes winter lows, not frost dates.
Frost dates across Tennessee →
Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.
Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.