USDA Hardiness Zone 6b
Frost Dates for 97630 — Lakeview, Oregon
NOAA 1991–2020 normals from Lakeview 2 NNW, OR (4,890 ft), 4 miles northeast.
Updated
In Lakeview, the last spring frost (32°F) is around June 4 in half of years and has passed by June 22 in nine years out of ten. The first fall frost comes around September 17, as early as August 27 one year in ten, leaving a typical freeze-free season of 102 days (NOAA, Lakeview 2 NNW, OR).
- Last spring frost
- June 4
- First fall frost
- September 17
- Growing season
- 102 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 14
- Last snow
- May 7
- Winters with snow
- 100%
- Snow per year
- 55.3"
median, 1991–2020
median, 1991–2020
18 of 18 observed
NOAA normal
Frost risk by date in Lakeview
Half of springs at Lakeview 2 NNW, OR see their last 32°F night by June 4; only one in ten is past it by May 13, and one in ten still has one after June 22. Planting tender crops after June 12 leaves a 30% risk of a frost on them, after June 16 20%, and after June 22 10%. The 18 days between the even-odds date and the one-in-ten date is narrower than at 77% of the 103 Oregon stations behind this site's ZIP pages.
In fall the first 32°F night comes by September 17 in half of years, as early as August 27 one year in ten, and holds off past October 5 one year in ten. A hard freeze of 28°F follows 13 days later, around September 30; in spring the one-in-ten date for 28°F is June 6, 16 days before the 32°F one. The freeze-free season lasts 102 days in a typical year, shorter than at 94% of the 103 Oregon stations; it reaches 128 days one year in ten and falls short of 75 one year in ten. On average 176 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 8.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | too rare for a date | ||||||||
| 32°F | May 13 | May 19 | May 27 | Jun 1 | Jun 4 | Jun 8 | Jun 12 | Jun 16 | Jun 22 |
| 28°F | Apr 24 | Apr 30 | May 3 | May 7 | May 12 | May 16 | May 22 | May 31 | Jun 6 |
| 24°F | Apr 2 | Apr 9 | Apr 14 | Apr 17 | Apr 20 | Apr 24 | Apr 29 | May 4 | May 13 |
| 20°F | Mar 5 | Mar 13 | Mar 21 | Mar 26 | Mar 31 | Apr 4 | Apr 7 | Apr 12 | Apr 18 |
| 16°F | Feb 13 | Feb 22 | Feb 28 | Mar 4 | Mar 8 | Mar 14 | Mar 20 | Mar 26 | Apr 2 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | too rare for a date | ||||||||
| 32°F | Aug 27 | Sep 4 | Sep 9 | Sep 13 | Sep 17 | Sep 20 | Sep 24 | Sep 29 | Oct 5 |
| 28°F | Sep 9 | Sep 17 | Sep 22 | Sep 26 | Sep 30 | Oct 3 | Oct 7 | Oct 12 | Oct 19 |
| 24°F | Sep 22 | Oct 2 | Oct 8 | Oct 15 | Oct 19 | Oct 23 | Oct 27 | Nov 1 | Nov 8 |
| 20°F | Oct 18 | Oct 23 | Oct 29 | Nov 1 | Nov 5 | Nov 9 | Nov 13 | Nov 20 | Nov 25 |
| 16°F | Oct 27 | Nov 3 | Nov 9 | Nov 13 | Nov 18 | Nov 22 | Nov 26 | Nov 30 | Dec 5 |
Freeze probabilities 1991–2020 at Lakeview 2 NNW, 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 97630 →Compare Lakeview with another place →
Weather by month in Lakeview
July is the warmest month at Lakeview 2 NNW, OR, averaging 86°F by day and 51°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). July is the only month with under a 10% chance of a 32°F night. In spring, June still brings one in 60% of years.
Warmth for growing adds up to 1,865 growing degree days a year (base 50°F), fewer than at 68% of the 103 Oregon stations. 23% of them (427) have built up by the end of June, and July adds the most, 579. Precipitation totals 14.5 inches a year, most in December (2.1") and least in August (0.2"); May to September bring 23% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 39 | 22 | 1.9 | 100% | 28 | 0 |
| Feb | 42 | 24 | 1.6 | 100% | 25 | 0 |
| Mar | 49 | 28 | 1.4 | 100% | 24 | 1 |
| Apr | 55 | 31 | 1.5 | 100% | 18 | 15 |
| May | 65 | 38 | 1.4 | 98% | 8 | 118 |
| Jun | 75 | 44 | 0.8 | 60% | 2 | 293 |
| Jul | 86 | 51 | 0.3 | 4% | <1 | 579 |
| Aug | 85 | 49 | 0.2 | 14% | <1 | 522 |
| Sep | 76 | 40 | 0.6 | 79% | 4 | 270 |
| Oct | 63 | 33 | 1.0 | 100% | 16 | 64 |
| Nov | 49 | 27 | 1.7 | 100% | 24 | 4 |
| Dec | 38 | 21 | 2.1 | 100% | 28 | 0 |
Monthly normals 1991–2020 at Lakeview 2 NNW, OR (4,890 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, Gerber Dam, OR, 36 miles west of Lakeview, has a last frost 4 days earlier (May 31), a first frost 4 days later (September 21), a season 12 days longer.
When it snows in Lakeview, Oregon
The first measurable snow (0.1 inch or more) in Lakeview usually arrives around November 14, and the last of the season around May 7. Those are the middle dates across the winters of 1991–2020 at Lakeview 2 NNW, OR, 4.1 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 28 days after the last snow.
Planting calendar for 97630
| When | What to do |
|---|---|
| March 26 – April 9 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| April 9 – April 23 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| May 7 – May 21 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| June 4 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by June 25 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by September 3 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| September 17 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 97630 is 4 miles from Lakeview 2 NNW, OR, which stands at 4,890 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 97630 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.