USDA Hardiness Zone 5b
Frost Dates for 84036 — Kamas, Utah
NOAA 1991–2020 normals from Kamas, UT (6,481 ft), 4 miles west.
Updated
In Kamas, the last spring frost (32°F) is around June 5 in half of years and has passed by June 23 in nine years out of ten. The first fall frost comes around September 17, as early as September 1 one year in ten, leaving a typical freeze-free season of 100 days (NOAA, Kamas, UT).
- Last spring frost
- June 5
- First fall frost
- September 17
- Growing season
- 100 days
- Hardiness zone
- 5b
50% probability
50% probability
freeze-free, 50%
-15 to -10°F (-26.1 to -23.3°C) coldest night
- First snow
- October 27
- Last snow
- April 30
- Winters with snow
- 100%
- Snow per year
- 96.9"
median, 1991–2020
median, 1991–2020
30 of 30 observed
NOAA normal
Frost risk by date in Kamas
Half of springs at Kamas, UT see their last 32°F night by June 5; only one in ten is past it by May 20, and one in ten still has one after June 23. Planting tender crops after June 13 leaves a 30% risk of a frost on them, after June 17 20%, and after June 23 10%. The 18 days between the even-odds date and the one-in-ten date is narrower than at 47% of the 66 Utah 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 September 1 one year in ten, and holds off past October 1 one year in ten. A hard freeze of 28°F follows 10 days later, around September 27; in spring the one-in-ten date for 28°F is June 6, 17 days before the 32°F one. The freeze-free season lasts 100 days in a typical year, shorter than at 92% of the 66 Utah stations; it reaches 121 days one year in ten and falls short of 80 one year in ten. On average 196 nights a year drop to 32°F or below. Severe cold of 16°F or below comes every winter, usually between November 1 and April 1.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | too rare for a date | ||||||||
| 32°F | May 20 | May 25 | May 30 | Jun 2 | Jun 5 | Jun 9 | Jun 13 | Jun 17 | Jun 23 |
| 28°F | May 1 | May 5 | May 10 | May 14 | May 19 | May 23 | May 28 | Jun 1 | Jun 6 |
| 24°F | Apr 14 | Apr 19 | Apr 24 | Apr 28 | May 1 | May 5 | May 9 | May 14 | May 21 |
| 20°F | Mar 29 | Apr 3 | Apr 6 | Apr 9 | Apr 14 | Apr 17 | Apr 21 | Apr 27 | May 4 |
| 16°F | Mar 11 | Mar 16 | Mar 24 | Mar 29 | Apr 1 | Apr 4 | Apr 7 | Apr 12 | Apr 18 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | too rare for a date | ||||||||
| 32°F | Sep 1 | Sep 7 | Sep 11 | Sep 14 | Sep 17 | Sep 20 | Sep 23 | Sep 27 | Oct 1 |
| 28°F | Sep 11 | Sep 17 | Sep 21 | Sep 25 | Sep 27 | Sep 30 | Oct 3 | Oct 6 | Oct 12 |
| 24°F | Sep 25 | Sep 30 | Oct 3 | Oct 6 | Oct 9 | Oct 13 | Oct 16 | Oct 21 | Oct 25 |
| 20°F | Oct 6 | Oct 12 | Oct 16 | Oct 19 | Oct 22 | Oct 25 | Oct 28 | Nov 1 | Nov 6 |
| 16°F | Oct 17 | Oct 23 | Oct 26 | Oct 29 | Nov 1 | Nov 4 | Nov 8 | Nov 12 | Nov 17 |
Freeze probabilities 1991–2020 at Kamas, UT, 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 84036 →Compare Kamas with another place →
Weather by month in Kamas
July is the warmest month at Kamas, UT, averaging 85°F by day and 50°F at night; January is the coldest at 35°F and 15°F. A freezing night is all but certain in every month from October to May (a 90% chance or more). From July to August the chance of a 32°F night stays under 10% each month. In spring, June still brings one in 66% of years.
Warmth for growing adds up to 1,709 growing degree days a year (base 50°F), fewer than at 88% of the 66 Utah stations. 24% of them (413) have built up by the end of June, and July adds the most, 532. Precipitation totals 16.8 inches a year, most in January (1.8") and least in July (0.8"); May to September bring 36% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 35 | 15 | 1.8 | 100% | 30 | 0 |
| Feb | 38 | 17 | 1.3 | 100% | 27 | 0 |
| Mar | 47 | 25 | 1.5 | 100% | 27 | 2 |
| Apr | 55 | 30 | 1.6 | 100% | 21 | 16 |
| May | 65 | 36 | 1.7 | 100% | 9 | 102 |
| Jun | 76 | 43 | 1.0 | 66% | 2 | 293 |
| Jul | 85 | 50 | 0.8 | 4% | <1 | 532 |
| Aug | 83 | 49 | 1.1 | 8% | <1 | 490 |
| Sep | 74 | 41 | 1.5 | 89% | 5 | 235 |
| Oct | 59 | 31 | 1.6 | 100% | 19 | 38 |
| Nov | 45 | 23 | 1.4 | 100% | 26 | 2 |
| Dec | 34 | 16 | 1.5 | 100% | 30 | 0 |
Monthly normals 1991–2020 at Kamas, UT (6,481 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, Heber, UT, 15 miles southwest of Kamas and 891 feet lower, has a last frost 1 day earlier (June 4), a first frost 3 days later (September 20), a season 6 days longer.
When it snows in Kamas, Utah
The first measurable snow (0.1 inch or more) in Kamas usually arrives around October 27, and the last of the season around April 30. Those are the middle dates across the winters of 1991–2020 at Kamas, UT, 4.4 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 36 days after the last snow.
Planting calendar for 84036
| When | What to do |
|---|---|
| March 27 – April 10 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| April 10 – April 24 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| May 8 – May 22 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| June 5 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 84036 is 4 miles from Kamas, UT, which stands at 6,481 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 84036 in zone 5b, the band where the coldest night of the year averaged -15 to -10°F (-26.1 to -23.3°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.