USDA Hardiness Zone 6b
Frost Dates for 65438 — Birch Tree, Missouri
NOAA 1991–2020 normals from Winona 3 SW, MO (961 ft), 6 miles east.
Updated
In Birch Tree, the last spring frost (32°F) is around April 22 in half of years and has passed by May 6 in nine years out of ten. The first fall frost comes around October 18, as early as October 5 one year in ten, leaving a typical freeze-free season of 176 days (NOAA, Winona 3 SW, MO).
- Last spring frost
- April 22
- First fall frost
- October 18
- Growing season
- 176 days
- Hardiness zone
- 6b
50% probability
50% probability
freeze-free, 50%
-5 to 0°F (-20.6 to -17.8°C) coldest night
- First snow
- January 5
- Last snow
- February 16
- Winters with snow
- 96%
- Snow per year
- —
median, 1991–2020
median, 1991–2020
25 of 26 observed
NOAA normal
Frost risk by date in Birch Tree
Half of springs at Winona 3 SW, MO see their last 32°F night by April 22; only one in ten is past it by April 8, and one in ten still has one after May 6. Planting tender crops after April 29 leaves a 30% risk of a frost on them, after May 1 20%, and after May 6 10%. The 14 days between the even-odds date and the one-in-ten date is narrower than at 80% of the 158 Missouri stations behind this site's ZIP pages.
In fall the first 32°F night comes by October 18 in half of years, as early as October 5 one year in ten, and holds off past October 28 one year in ten. A hard freeze of 28°F follows 9 days later, around October 27; in spring the one-in-ten date for 28°F is April 26, 10 days before the 32°F one. The freeze-free season lasts 176 days in a typical year, shorter than at 94% of the 158 Missouri stations; it reaches 196 days one year in ten and falls short of 157 one year in ten. On average 125 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 9 days longer, to about May 1, and return around October 8. Severe cold of 16°F or below comes every winter, usually between December 4 and March 1.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 17 | Apr 22 | Apr 26 | Apr 29 | May 1 | May 3 | May 6 | May 10 | May 14 |
| 32°F | Apr 8 | Apr 13 | Apr 16 | Apr 19 | Apr 22 | Apr 25 | Apr 29 | May 1 | May 6 |
| 28°F | Mar 24 | Mar 31 | Apr 4 | Apr 7 | Apr 10 | Apr 13 | Apr 17 | Apr 21 | Apr 26 |
| 24°F | Mar 8 | Mar 15 | Mar 20 | Mar 24 | Mar 29 | Apr 1 | Apr 4 | Apr 9 | Apr 15 |
| 20°F | Feb 24 | Mar 1 | Mar 6 | Mar 10 | Mar 14 | Mar 17 | Mar 21 | Mar 28 | Apr 3 |
| 16°F | Feb 6 | Feb 15 | Feb 22 | Feb 27 | Mar 1 | Mar 5 | Mar 10 | Mar 14 | Mar 21 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 27 | Oct 1 | Oct 3 | Oct 6 | Oct 8 | Oct 10 | Oct 13 | Oct 16 | Oct 20 |
| 32°F | Oct 5 | Oct 9 | Oct 12 | Oct 15 | Oct 18 | Oct 20 | Oct 22 | Oct 25 | Oct 28 |
| 28°F | Oct 15 | Oct 19 | Oct 22 | Oct 25 | Oct 27 | Oct 30 | Nov 1 | Nov 4 | Nov 9 |
| 24°F | Oct 24 | Oct 29 | Nov 1 | Nov 4 | Nov 6 | Nov 10 | Nov 14 | Nov 19 | Nov 25 |
| 20°F | Nov 1 | Nov 6 | Nov 11 | Nov 16 | Nov 20 | Nov 25 | Nov 29 | Dec 3 | Dec 10 |
| 16°F | Nov 11 | Nov 20 | Nov 26 | Dec 1 | Dec 4 | Dec 8 | Dec 13 | Dec 20 | Dec 27 |
Freeze probabilities 1991–2020 at Winona 3 SW, MO, 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 65438 →Compare Birch Tree with another place →
Compared with the next station
The nearest other station, Summersville 3 SE, MO, 15 miles northwest of Birch Tree and 275 feet higher, has a last frost 15 days earlier (April 7), a first frost 9 days later (October 27), a season 25 days longer.
When it snows in Birch Tree, Missouri
The first measurable snow (0.1 inch or more) in Birch Tree usually arrives around January 5, and the last of the season around February 16. Those are the middle dates across the winters of 1991–2020 at Summersville 3 SE, MO, 14.7 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 65 days after the last snow.
Planting calendar for 65438
| When | What to do |
|---|---|
| February 11 – February 25 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| February 25 – March 11 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| March 25 – April 8 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| April 22 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by July 26 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 4 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| October 18 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 65438 is 6 miles from Winona 3 SW, MO, which stands at 961 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 65438 in zone 6b, the band where the coldest night of the year averaged -5 to 0°F (-20.6 to -17.8°C) over 1991–2020; a zone describes winter lows, not frost dates.
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.