USDA Hardiness Zone 5b
Frost Dates for 84629 — Fairview, Utah
NOAA 1991–2020 normals from Scofield-Skyline Mine, UT (8,697 ft), 12 miles east.
Updated
In Fairview, the last spring frost (32°F) is around June 13 in half of years and has passed by June 30 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 94 days (NOAA, Scofield-Skyline Mine, UT).
- Last spring frost
- June 13
- First fall frost
- September 17
- Growing season
- 94 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 28
- Last snow
- May 4
- Winters with snow
- 100%
- Snow per year
- 106.2"
median, 1991–2020
median, 1991–2020
20 of 20 observed
NOAA normal
Frost risk by date in Fairview
Half of springs at Scofield-Skyline Mine, UT see their last 32°F night by June 13; only one in ten is past it by May 29, and one in ten still has one after June 30. Planting tender crops after June 21 leaves a 30% risk of a frost on them, after June 24 20%, and after June 30 10%. The 17 days between the even-odds date and the one-in-ten date is narrower than at 68% 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 September 28 one year in ten. A hard freeze of 28°F follows 9 days later, around September 26; in spring the one-in-ten date for 28°F is June 21, 9 days before the 32°F one. The freeze-free season lasts 94 days in a typical year, shorter than at 95% of the 66 Utah stations; it reaches 116 days one year in ten and falls short of 71 one year in ten. On average 227 nights a year drop to 32°F or below. Severe cold of 16°F or below comes every winter, usually between October 27 and April 19.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | too rare for a date | ||||||||
| 32°F | May 29 | Jun 3 | Jun 6 | Jun 10 | Jun 13 | Jun 17 | Jun 21 | Jun 24 | Jun 30 |
| 28°F | May 12 | May 18 | May 23 | May 28 | Jun 1 | Jun 5 | Jun 8 | Jun 15 | Jun 21 |
| 24°F | May 1 | May 5 | May 8 | May 11 | May 15 | May 19 | May 24 | Jun 1 | Jun 10 |
| 20°F | Apr 17 | Apr 22 | Apr 25 | Apr 29 | May 2 | May 5 | May 8 | May 13 | May 23 |
| 16°F | Apr 3 | Apr 9 | Apr 13 | Apr 17 | Apr 19 | Apr 23 | Apr 27 | May 1 | May 6 |
| 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 15 | Sep 17 | Sep 20 | Sep 23 | Sep 25 | Sep 28 |
| 28°F | Sep 9 | Sep 16 | Sep 21 | Sep 23 | Sep 26 | Sep 28 | Oct 1 | Oct 4 | Oct 10 |
| 24°F | Sep 21 | Sep 26 | Sep 29 | Oct 2 | Oct 5 | Oct 9 | Oct 13 | Oct 17 | Oct 22 |
| 20°F | Sep 30 | Oct 5 | Oct 10 | Oct 14 | Oct 18 | Oct 21 | Oct 24 | Oct 27 | Nov 2 |
| 16°F | Oct 11 | Oct 18 | Oct 22 | Oct 25 | Oct 27 | Oct 31 | Nov 3 | Nov 7 | Nov 13 |
Freeze probabilities 1991–2020 at Scofield-Skyline Mine, 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 84629 →Compare Fairview with another place →
Weather by month in Fairview
July is the warmest month at Scofield-Skyline Mine, UT, averaging 74°F by day and 48°F at night; December is the coldest at 30°F and 12°F. A freezing night is all but certain in every month from September 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 84% of years and July still brings one in 10% of years.
Warmth for growing adds up to 905 growing degree days a year (base 50°F), fewer than at 98% of the 66 Utah stations. 20% of them (177) have built up by the end of June, and July adds the most, 339. Precipitation totals 25.9 inches a year, most in January (3.0") and least in June (1.1"); May to September bring 31% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 30 | 13 | 3.0 | 100% | 31 | 0 |
| Feb | 31 | 14 | 2.7 | 100% | 28 | 0 |
| Mar | 38 | 20 | 2.4 | 100% | 31 | 0 |
| Apr | 44 | 24 | 2.7 | 100% | 27 | 1 |
| May | 54 | 33 | 1.9 | 100% | 17 | 25 |
| Jun | 66 | 41 | 1.1 | 84% | 5 | 152 |
| Jul | 74 | 48 | 1.5 | 10% | <1 | 339 |
| Aug | 72 | 46 | 1.6 | 9% | <1 | 283 |
| Sep | 63 | 39 | 1.9 | 93% | 6 | 99 |
| Oct | 50 | 29 | 1.9 | 100% | 22 | 8 |
| Nov | 38 | 19 | 2.3 | 100% | 29 | 0 |
| Dec | 30 | 12 | 2.9 | 100% | 31 | 0 |
Monthly normals 1991–2020 at Scofield-Skyline Mine, UT (8,697 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, Moroni, UT, 15 miles southwest of Fairview and 3,117 feet lower, has a last frost 18 days earlier (May 26), a first frost 8 days later (September 25), a season 25 days longer.
When it snows in Fairview, Utah
The first measurable snow (0.1 inch or more) in Fairview usually arrives around October 28, and the last of the season around May 4. Those are the middle dates across the winters of 1991–2020 at Fairview 8N, UT, 3.3 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 40 days after the last snow.
Planting calendar for 84629
| When | What to do |
|---|---|
| April 4 – April 18 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| April 18 – May 2 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| May 16 – May 30 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| June 13 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 84629 is 12 miles from Scofield-Skyline Mine, UT, which stands at 8,697 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 84629 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.