USDA Hardiness Zone 6b
Frost Dates for 26582 — Mannington, West Virginia
NOAA 1991–2020 normals from Mannington 8 WNW, WV (1,100 ft), 6 miles west.
Updated
In Mannington, the last spring frost (32°F) is around May 3 in half of years and has passed by May 22 in nine years out of ten. The first fall frost comes around October 10, as early as September 27 one year in ten, leaving a typical freeze-free season of 159 days (NOAA, Mannington 8 WNW, WV).
- Last spring frost
- May 3
- First fall frost
- October 10
- Growing season
- 159 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
- November 23
- Last snow
- March 23
- Winters with snow
- 100%
- Snow per year
- —
median, 1991–2020
median, 1991–2020
18 of 18 observed
NOAA normal
Frost risk by date in Mannington
Half of springs at Mannington 8 WNW, WV see their last 32°F night by May 3; only one in ten is past it by April 19, and one in ten still has one after May 22. Planting tender crops after May 11 leaves a 30% risk of a frost on them, after May 15 20%, and after May 22 10%. The 19 days between the even-odds date and the one-in-ten date is wider than at 61% of the 84 West Virginia stations behind this site's ZIP pages.
In fall the first 32°F night comes by October 10 in half of years, as early as September 27 one year in ten, and holds off past October 26 one year in ten. A hard freeze of 28°F follows 12 days later, around October 22; in spring the one-in-ten date for 28°F is May 12, 10 days before the 32°F one. The freeze-free season lasts 159 days in a typical year, shorter than at 88% of the 84 West Virginia stations; it reaches 180 days one year in ten and falls short of 135 one year in ten. On average 144 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 12 days longer, to about May 15, and return around October 1. Severe cold of 16°F or below comes every winter, usually between November 25 and March 15.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 29 | May 3 | May 8 | May 12 | May 15 | May 19 | May 22 | May 27 | May 31 |
| 32°F | Apr 19 | Apr 24 | Apr 27 | Apr 30 | May 3 | May 7 | May 11 | May 15 | May 22 |
| 28°F | Apr 7 | Apr 12 | Apr 16 | Apr 19 | Apr 22 | Apr 24 | Apr 29 | May 4 | May 12 |
| 24°F | Mar 23 | Mar 29 | Apr 1 | Apr 4 | Apr 7 | Apr 10 | Apr 14 | Apr 18 | Apr 23 |
| 20°F | Mar 10 | Mar 16 | Mar 20 | Mar 23 | Mar 27 | Mar 30 | Apr 1 | Apr 4 | Apr 8 |
| 16°F | Feb 26 | Mar 3 | Mar 7 | Mar 11 | Mar 15 | Mar 17 | Mar 20 | Mar 24 | Mar 29 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 18 | Sep 22 | Sep 26 | Sep 28 | Oct 1 | Oct 3 | Oct 6 | Oct 9 | Oct 13 |
| 32°F | Sep 27 | Oct 1 | Oct 4 | Oct 7 | Oct 10 | Oct 13 | Oct 16 | Oct 20 | Oct 26 |
| 28°F | Oct 5 | Oct 10 | Oct 14 | Oct 18 | Oct 22 | Oct 25 | Oct 29 | Nov 1 | Nov 5 |
| 24°F | Oct 14 | Oct 22 | Oct 27 | Oct 30 | Nov 1 | Nov 4 | Nov 7 | Nov 10 | Nov 16 |
| 20°F | Oct 30 | Nov 2 | Nov 5 | Nov 9 | Nov 12 | Nov 15 | Nov 19 | Nov 24 | Dec 2 |
| 16°F | Nov 6 | Nov 13 | Nov 18 | Nov 21 | Nov 25 | Nov 30 | Dec 3 | Dec 9 | Dec 18 |
Freeze probabilities 1991–2020 at Mannington 8 WNW, WV, 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 26582 →Compare Mannington with another place →
Weather by month in Mannington
July is the warmest month at Mannington 8 WNW, WV, averaging 84°F by day and 60°F at night; January is the coldest at 38°F and 19°F. A freezing night is all but certain in every month from October to April (a 90% chance or more). From June to August the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 55% of years.
Warmth for growing adds up to 2,960 growing degree days a year (base 50°F), fewer than at 85% of the 84 West Virginia stations. 35% of them (1,043) have built up by the end of June, and July adds the most, 684. Precipitation totals 51.5 inches a year, most in July (5.6") and least in October (3.4"); May to September bring 45% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 38 | 19 | 4.4 | 100% | 27 | 3 |
| Feb | 42 | 20 | 4.0 | 100% | 25 | 4 |
| Mar | 52 | 27 | 4.4 | 100% | 23 | 30 |
| Apr | 66 | 36 | 4.3 | 100% | 12 | 130 |
| May | 74 | 47 | 4.9 | 55% | 3 | 332 |
| Jun | 81 | 55 | 4.4 | 1% | <1 | 543 |
| Jul | 84 | 60 | 5.6 | 0% | 0 | 684 |
| Aug | 83 | 58 | 4.1 | 0% | 0 | 642 |
| Sep | 77 | 51 | 4.2 | 18% | <1 | 417 |
| Oct | 66 | 39 | 3.4 | 96% | 9 | 142 |
| Nov | 53 | 29 | 3.6 | 100% | 20 | 26 |
| Dec | 43 | 24 | 4.2 | 100% | 26 | 6 |
Monthly normals 1991–2020 at Mannington 8 WNW, WV (1,100 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, Burton, WV, 9 miles north of Mannington, has a last frost 1 day later (May 4), a first frost 2 days later (October 12), a season 1 day shorter.
When it snows in Mannington, West Virginia
The first measurable snow (0.1 inch or more) in Mannington usually arrives around November 23, and the last of the season around March 23. Those are the middle dates across the winters of 1991–2020 at Mannington 8 WNW, WV, 5.8 miles away: half of years saw snow earlier, half later. Every one of those winters saw snow. The last 32°F night of spring typically comes 41 days after the last snow.
Planting calendar for 26582
| When | What to do |
|---|---|
| February 22 – March 8 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| March 8 – March 22 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| April 5 – April 19 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| May 3 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by July 18 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by September 26 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| October 10 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 26582 is 6 miles from Mannington 8 WNW, WV, which stands at 1,100 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 26582 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.
Frost dates across West Virginia →
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.