USDA Hardiness Zone 6b
Frost Dates for 97739 — La Pine, Oregon
NOAA 1991–2020 normals from Wickiup Dam, OR (4,358 ft), 8 miles west.
Updated
In La Pine, the last spring frost (32°F) is around June 7 in half of years and has passed by July 2 in nine years out of ten. The first fall frost comes around September 18, as early as September 3 one year in ten, leaving a typical freeze-free season of 100 days (NOAA, Wickiup Dam, OR).
- Last spring frost
- June 7
- First fall frost
- September 18
- Growing season
- 100 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 4
- Last snow
- April 18
- Winters with snow
- 100%
- Snow per year
- 73.9"
median, 1991–2020
median, 1991–2020
27 of 27 observed
NOAA normal
Frost risk by date in La Pine
Half of springs at Wickiup Dam, OR see their last 32°F night by June 7; only one in ten is past it by May 16, and one in ten still has one after July 2. Planting tender crops after June 16 leaves a 30% risk of a frost on them, after June 21 20%, and after July 2 10%. The 25 days between the even-odds date and the one-in-ten date is wider than at 68% 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 September 18 in half of years, as early as September 3 one year in ten, and holds off past October 3 one year in ten. A hard freeze of 28°F follows 15 days later, around October 3; in spring the one-in-ten date for 28°F is June 13, 19 days before the 32°F one. The freeze-free season lasts 100 days in a typical year, shorter than at 95% of the 103 Oregon stations; it reaches 128 days one year in ten and falls short of 69 one year in ten. On average 201 nights a year drop to 32°F or below. Severe cold of 16°F or below comes every winter, usually between November 18 and March 9.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | too rare for a date | ||||||||
| 32°F | May 16 | May 23 | May 29 | Jun 2 | Jun 7 | Jun 12 | Jun 16 | Jun 21 | Jul 2 |
| 28°F | Apr 28 | May 2 | May 7 | May 11 | May 16 | May 20 | May 28 | Jun 3 | Jun 13 |
| 24°F | Apr 2 | Apr 10 | Apr 18 | Apr 25 | Apr 29 | May 2 | May 6 | May 12 | May 23 |
| 20°F | Mar 8 | Mar 16 | Mar 24 | Mar 29 | Apr 3 | Apr 10 | Apr 19 | Apr 29 | May 6 |
| 16°F | Feb 17 | Feb 24 | Mar 1 | Mar 5 | Mar 9 | Mar 15 | Mar 22 | Mar 30 | Apr 18 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | too rare for a date | ||||||||
| 32°F | Sep 3 | Sep 8 | Sep 12 | Sep 15 | Sep 18 | Sep 21 | Sep 25 | Sep 28 | Oct 3 |
| 28°F | Sep 17 | Sep 23 | Sep 27 | Oct 1 | Oct 3 | Oct 5 | Oct 9 | Oct 13 | Oct 18 |
| 24°F | Oct 2 | Oct 7 | Oct 12 | Oct 16 | Oct 19 | Oct 23 | Oct 28 | Nov 1 | Nov 8 |
| 20°F | Oct 14 | Oct 20 | Oct 25 | Oct 30 | Nov 2 | Nov 6 | Nov 12 | Nov 18 | Nov 26 |
| 16°F | Oct 24 | Nov 1 | Nov 7 | Nov 13 | Nov 18 | Nov 23 | Nov 29 | Dec 3 | Dec 11 |
Freeze probabilities 1991–2020 at Wickiup Dam, 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 97739 →Compare La Pine with another place →
Weather by month in La Pine
July is the warmest month at Wickiup Dam, OR, averaging 83°F by day and 47°F at night; December is the coldest at 38°F and 21°F. A freezing night is all but certain in every month from October to May (a 90% chance or more). August is the only month with under a 10% chance of a 32°F night. In spring, June still brings one in 58% of years and July still brings one in 11% of years.
Warmth for growing adds up to 1,514 growing degree days a year (base 50°F), fewer than at 87% of the 103 Oregon stations. 22% of them (337) have built up by the end of June, and July adds the most, 463. Precipitation totals 19.6 inches a year, most in December (3.6") and least in July (0.5"); May to September bring 20% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 40 | 21 | 3.0 | 100% | 30 | 0 |
| Feb | 43 | 22 | 2.0 | 100% | 27 | 0 |
| Mar | 48 | 26 | 1.7 | 100% | 29 | 1 |
| Apr | 54 | 30 | 1.3 | 100% | 23 | 15 |
| May | 63 | 36 | 1.3 | 99% | 10 | 99 |
| Jun | 71 | 42 | 0.9 | 58% | 2 | 222 |
| Jul | 83 | 47 | 0.5 | 11% | <1 | 463 |
| Aug | 82 | 46 | 0.6 | 7% | <1 | 436 |
| Sep | 75 | 38 | 0.6 | 82% | 6 | 229 |
| Oct | 62 | 31 | 1.5 | 100% | 20 | 48 |
| Nov | 46 | 26 | 2.6 | 100% | 25 | 2 |
| Dec | 38 | 21 | 3.6 | 100% | 29 | 0 |
Monthly normals 1991–2020 at Wickiup Dam, OR (4,358 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, Bend, OR, 28 miles northeast of La Pine and 698 feet lower, has a last frost 1 day earlier (June 6), a first frost 2 days later (September 20), a season 5 days longer.
When it snows in La Pine, Oregon
The first measurable snow (0.1 inch or more) in La Pine usually arrives around November 4, and the last of the season around April 18. Those are the middle dates across the winters of 1991–2020 at Wickiup Dam, OR, 7.5 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 50 days after the last snow.
Planting calendar for 97739
| When | What to do |
|---|---|
| March 29 – April 12 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| April 12 – April 26 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| May 10 – May 24 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| June 7 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by June 26 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by September 4 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| September 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 97739 is 8 miles from Wickiup Dam, OR, which stands at 4,358 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 97739 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.