USDA Hardiness Zone 6a
Frost Dates for 84310 — Eden, Utah
NOAA 1991–2020 normals from Eden-Liberty, UT (5,195 ft), 2 miles southwest.
Updated
In Eden, the last spring frost (32°F) is around May 25 in half of years and has passed by June 16 in nine years out of ten. The first fall frost comes around September 26, as early as September 12 one year in ten, leaving a typical freeze-free season of 123 days (NOAA, Eden-Liberty, UT).
- Last spring frost
- May 25
- First fall frost
- September 26
- Growing season
- 123 days
- Hardiness zone
- 6a
50% probability
50% probability
freeze-free, 50%
-10 to -5°F (-23.3 to -20.6°C) coldest night
- First snow
- November 5
- Last snow
- April 17
- Winters with snow
- 100%
- Snow per year
- 107.9"
median, 1991–2020
median, 1991–2020
22 of 22 observed
NOAA normal
Frost risk by date in Eden
Half of springs at Eden-Liberty, UT see their last 32°F night by May 25; only one in ten is past it by May 4, and one in ten still has one after June 16. Planting tender crops after June 4 leaves a 30% risk of a frost on them, after June 8 20%, and after June 16 10%. The 22 days between the even-odds date and the one-in-ten date is wider than at 80% of the 66 Utah 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 26 in half of years, as early as September 12 one year in ten, and holds off past October 12 one year in ten. A hard freeze of 28°F follows 11 days later, around October 7; in spring the one-in-ten date for 28°F is May 30, 17 days before the 32°F one. The freeze-free season lasts 123 days in a typical year, shorter than at 71% of the 66 Utah stations; it reaches 148 days one year in ten and falls short of 98 one year in ten. On average 175 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 16 days longer, to about June 10, and return around September 15. Severe cold of 16°F or below comes every winter, usually between November 14 and March 14.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 23 | May 31 | Jun 4 | Jun 7 | Jun 10 | Jun 14 | Jun 17 | Jun 21 | Jun 26 |
| 32°F | May 4 | May 11 | May 16 | May 20 | May 25 | May 31 | Jun 4 | Jun 8 | Jun 16 |
| 28°F | Apr 17 | Apr 22 | Apr 27 | May 1 | May 4 | May 8 | May 13 | May 19 | May 30 |
| 24°F | Mar 30 | Apr 4 | Apr 8 | Apr 11 | Apr 15 | Apr 19 | Apr 24 | Apr 28 | May 4 |
| 20°F | Mar 10 | Mar 16 | Mar 21 | Mar 26 | Mar 30 | Apr 2 | Apr 5 | Apr 9 | Apr 16 |
| 16°F | Feb 26 | Mar 3 | Mar 7 | Mar 10 | Mar 14 | Mar 17 | Mar 22 | Mar 28 | Apr 3 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 1 | Sep 5 | Sep 9 | Sep 13 | Sep 15 | Sep 17 | Sep 20 | Sep 23 | Sep 28 |
| 32°F | Sep 12 | Sep 17 | Sep 21 | Sep 24 | Sep 26 | Sep 29 | Oct 1 | Oct 5 | Oct 12 |
| 28°F | Sep 23 | Sep 28 | Oct 1 | Oct 4 | Oct 7 | Oct 10 | Oct 14 | Oct 18 | Oct 23 |
| 24°F | Oct 4 | Oct 8 | Oct 13 | Oct 16 | Oct 20 | Oct 23 | Oct 27 | Oct 31 | Nov 5 |
| 20°F | Oct 17 | Oct 23 | Oct 27 | Oct 31 | Nov 2 | Nov 6 | Nov 9 | Nov 13 | Nov 18 |
| 16°F | Oct 26 | Nov 2 | Nov 6 | Nov 9 | Nov 14 | Nov 17 | Nov 20 | Nov 24 | Nov 27 |
Freeze probabilities 1991–2020 at Eden-Liberty, 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 84310 →Compare Eden with another place →
Compared with the next station
The nearest other station, Huntsville Monastery, UT, 10 miles southeast of Eden, has a last frost 10 days later (June 4), a first frost 10 days earlier (September 16), a season 21 days shorter.
When it snows in Eden, Utah
The first measurable snow (0.1 inch or more) in Eden usually arrives around November 5, and the last of the season around April 17. Those are the middle dates across the winters of 1991–2020 at Pineview Dam, UT, 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 38 days after the last snow.
Planting calendar for 84310
| When | What to do |
|---|---|
| March 16 – March 30 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| March 30 – April 13 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| April 27 – May 11 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| May 25 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by July 4 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by September 12 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| September 26 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 84310 is 2 miles from Eden-Liberty, UT, which stands at 5,195 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 84310 in zone 6a, the band where the coldest night of the year averaged -10 to -5°F (-23.3 to -20.6°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.