USDA Hardiness Zone 9a
Frost Dates for 97498 — Yachats, Oregon
NOAA 1991–2020 normals from Yachats, OR (50 ft), 2 miles west.
Updated
In Yachats, the last spring frost (32°F) is around February 19 in half of years and has passed by March 23 in nine years out of ten. The first fall frost comes around December 11, as early as November 12 one year in ten, leaving a typical freeze-free season of 303 days (NOAA, Yachats, OR).
- Last spring frost
- February 19
- First fall frost
- December 11
- Growing season
- 303 days
- Hardiness zone
- 9a
50% probability
50% probability
freeze-free, 50%
20 to 25°F (-6.7 to -3.9°C) coldest night
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 19%
- Snow per year
- 0.8"
median, 1991–2020
median, 1991–2020
5 of 26 observed
NOAA normal
Frost risk by date in Yachats
Half of springs at Yachats, OR see their last 32°F night by February 19; only one in ten is past it by December 18, and one in ten still has one after March 23. Planting tender crops after March 2 leaves a 30% risk of a frost on them, after March 10 20%, and after March 23 10%. The 32 days between the even-odds date and the one-in-ten date is wider than at 92% of the 103 Oregon stations behind this site's ZIP pages, so a fixed calendar date is a gamble here.
In fall the first 32°F night comes by December 11 in half of years, as early as November 12 one year in ten, and holds off past February 13 one year in ten. A hard freeze of 28°F is less common: it came in 42% of winters. The freeze-free season lasts 303 days in a typical year, longer than at 96% of the 103 Oregon stations; it reaches 363 days one year in ten and falls short of 250 one year in ten. On average 7 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 44 days longer, to about April 4, and return around November 18. A 24°F night is unusual: 10% of winters had one.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 7 | Mar 20 | Mar 26 | Mar 31 | Apr 4 | Apr 9 | Apr 14 | Apr 19 | Apr 27 |
| 32°F92% of yrs | Dec 18 | Jan 5 | Jan 27 | Feb 10 | Feb 19 | Feb 25 | Mar 2 | Mar 10 | Mar 23 |
| 28°F42% of yrs | too rare for a date | ||||||||
| 24°F10% of yrs | too rare for a date | ||||||||
| 20°F2% of yrs | too rare for a date | ||||||||
| 16°F0% of yrs | too rare for a date | ||||||||
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 25 | Nov 1 | Nov 8 | Nov 13 | Nov 18 | Nov 23 | Nov 28 | Dec 4 | Dec 13 |
| 32°F92% of yrs | Nov 12 | Nov 22 | Dec 1 | Dec 6 | Dec 11 | Dec 20 | Dec 30 | Jan 15 | Feb 13 |
| 28°F42% of yrs | too rare for a date | ||||||||
| 24°F10% of yrs | too rare for a date | ||||||||
| 20°F2% of yrs | too rare for a date | ||||||||
| 16°F0% of yrs | too rare for a date | ||||||||
Freeze probabilities 1991–2020 at Yachats, OR, 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 97498 →Compare Yachats with another place →
Weather by month in Yachats
August is the warmest month at Yachats, OR, averaging 65°F by day and 52°F at night; December is the coldest at 52°F and 41°F. From April to October the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 47% of years and March still brings one in 26% of years.
Warmth for growing adds up to 1,381 growing degree days a year (base 50°F), fewer than at 94% of the 103 Oregon stations. 31% of them (424) have built up by the end of June, and August adds the most, 253. Precipitation totals 78.4 inches a year, most in December (13.2") and least in July (0.9"); May to September bring 15% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 53 | 42 | 11.9 | 38% | 2 | 32 |
| Feb | 54 | 41 | 8.7 | 47% | 1 | 26 |
| Mar | 55 | 42 | 9.7 | 26% | 1 | 29 |
| Apr | 57 | 43 | 6.6 | 4% | <1 | 41 |
| May | 59 | 47 | 4.4 | 0% | 0 | 109 |
| Jun | 62 | 50 | 3.1 | 0% | 0 | 186 |
| Jul | 64 | 52 | 0.9 | 0% | 0 | 248 |
| Aug | 65 | 52 | 0.9 | 0% | 0 | 253 |
| Sep | 65 | 50 | 2.1 | 0% | 0 | 223 |
| Oct | 61 | 48 | 6.2 | 3% | <1 | 149 |
| Nov | 56 | 44 | 10.7 | 25% | 1 | 59 |
| Dec | 52 | 41 | 13.2 | 53% | 2 | 26 |
Monthly normals 1991–2020 at Yachats, OR (50 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, Newport 1 SE, OR, 21 miles north of Yachats, has the same 50% last-frost date, a first frost 5 days later (December 16), a season 3 days longer.
When it snows in Yachats, Oregon
Measurable snow is rare here: only 5 of 26 winters from 1991 to 2020 recorded 0.1 inch or more at Alsea Fh (Fall Creek), OR, 15.9 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 97498
| When | What to do |
|---|---|
| December 11 – December 25 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| December 25 – January 8 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| January 22 – February 5 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| February 19 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by September 18 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by November 27 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| December 11 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 97498 is 2 miles from Yachats, OR, which stands at 50 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 97394 (Waldport). The 2023 USDA Plant Hardiness Zone Map lists ZIP 97498 in zone 9a, the band where the coldest night of the year averaged 20 to 25°F (-6.7 to -3.9°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.