USDA Hardiness Zone 9a
Frost Dates for 97467 — Reedsport, Oregon
NOAA 1991–2020 normals from Winchester Bay Coast Grd, OR (8 ft), 9 miles west.
Updated
In Reedsport, the last spring frost (32°F) is around March 25 in half of years and has passed by April 27 in nine years out of ten. The first fall frost comes around November 24, as early as October 27 one year in ten, leaving a typical freeze-free season of 249 days (NOAA, Winchester Bay Coast Grd, OR).
- Last spring frost
- March 25
- First fall frost
- November 24
- Growing season
- 249 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
- 0%
- Snow per year
- —
median, 1991–2020
median, 1991–2020
0 of 20 observed
NOAA normal
Frost risk by date in Reedsport
Half of springs at Winchester Bay Coast Grd, OR see their last 32°F night by March 25; only one in ten is past it by February 15, and one in ten still has one after April 27. Planting tender crops after April 4 leaves a 30% risk of a frost on them, after April 14 20%, and after April 27 10%. The 33 days between the even-odds date and the one-in-ten date is wider than at 95% 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 November 24 in half of years, as early as October 27 one year in ten, and holds off past January 1 one year in ten. A hard freeze of 28°F follows 32 days later, around December 26; in spring the one-in-ten date for 28°F is March 29, 29 days before the 32°F one. The freeze-free season lasts 249 days in a typical year, longer than at 85% of the 103 Oregon stations; it reaches 304 days one year in ten and falls short of 202 one year in ten. On average 19 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 33 days longer, to about April 27, and return around October 30. A 24°F night is unusual: 37% of winters had one.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 31 | Apr 8 | Apr 16 | Apr 22 | Apr 27 | Apr 30 | May 4 | May 10 | May 19 |
| 32°F | Feb 15 | Feb 24 | Mar 5 | Mar 15 | Mar 25 | Mar 30 | Apr 4 | Apr 14 | Apr 27 |
| 28°F85% of yrs | Dec 23 | Jan 9 | Jan 28 | Feb 9 | Feb 17 | Feb 26 | Mar 5 | Mar 14 | Mar 29 |
| 24°F37% of yrs | too rare for a date | ||||||||
| 20°F10% of yrs | too rare for a date | ||||||||
| 16°F2% of yrs | too rare for a date | ||||||||
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 8 | Oct 17 | Oct 21 | Oct 25 | Oct 30 | Nov 3 | Nov 8 | Nov 15 | Nov 25 |
| 32°F | Oct 27 | Nov 4 | Nov 10 | Nov 17 | Nov 24 | Dec 1 | Dec 7 | Dec 16 | Jan 1 |
| 28°F85% of yrs | Nov 15 | Nov 28 | Dec 8 | Dec 16 | Dec 26 | Jan 3 | Jan 15 | Feb 2 | Feb 19 |
| 24°F37% of yrs | too rare for a date | ||||||||
| 20°F10% of yrs | too rare for a date | ||||||||
| 16°F2% of yrs | too rare for a date | ||||||||
Freeze probabilities 1991–2020 at Winchester Bay Coast Grd, 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 97467 →Compare Reedsport with another place →
Weather by month in Reedsport
August is the warmest month at Winchester Bay Coast Grd, OR, averaging 70°F by day and 52°F at night; December is the coldest at 53°F and 39°F. From May to September the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 77% of years and March still brings one in 60% of years and April still brings one in 32% of years.
Warmth for growing adds up to 1,733 growing degree days a year (base 50°F), fewer than at 78% of the 103 Oregon stations. 29% of them (500) have built up by the end of June, and August adds the most, 346.
| Month | High °F | Low °F | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|
| Jan | 54 | 39 | 79% | 5 | 19 |
| Feb | 55 | 39 | 77% | 3 | 23 |
| Mar | 56 | 40 | 60% | 3 | 31 |
| Apr | 59 | 42 | 32% | 1 | 60 |
| May | 63 | 46 | 5% | <1 | 142 |
| Jun | 66 | 49 | 0% | 0 | 226 |
| Jul | 70 | 52 | 0% | 0 | 332 |
| Aug | 70 | 52 | 0% | 0 | 346 |
| Sep | 71 | 50 | 0% | 0 | 312 |
| Oct | 65 | 46 | 16% | <1 | 172 |
| Nov | 58 | 42 | 53% | 2 | 53 |
| Dec | 53 | 39 | 75% | 5 | 18 |
Monthly normals 1991–2020 at Winchester Bay Coast Grd, OR (8 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, North Bend Regional Airport, OR, 22 miles southwest of Reedsport, has a last frost 32 days earlier (February 21), a first frost 15 days later (December 9), a season 45 days longer.
When it snows in Reedsport, Oregon
Measurable snow is rare here: only 0 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Winchester Bay Coast Grd, OR, 8.8 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 97467
| When | What to do |
|---|---|
| January 14 – January 28 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| January 28 – February 11 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| February 25 – March 11 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| March 25 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by September 1 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by November 10 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| November 24 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 97467 is 9 miles from Winchester Bay Coast Grd, OR, which stands at 8 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 97467 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.