Roosevelt, UT frost dates
Last spring frostMay 23median date
First fall frostSep 22median date
Growing season122 daysfrost-free
Hardiness zone5bZone 5b
How Roosevelt compares
- In 8 years out of 10, the last spring frost in Roosevelt falls between May 9 and June 9, a 31-day window. The first fall frost falls between September 8 and October 3.
- The median last frost is 13 days later than the Utah median of May 10.
- Its 122-day growing season is longer than 22% of the 250 Utah places with a regular frost season (state median 148 days).
- The last frost is 22 days later than the zone 5b median of May 1. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 5b chart.
- The weather station records an average of 190 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 9 |
| 50% (median) | May 23 |
| 10% (safe for tender plants) | June 9 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 8 |
| 50% (median) | September 22 |
| 90% (late) | October 3 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Roosevelt, UT
Roosevelt, UT frost dates — last frost May 23, first frost Sep 22, zone 5b. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Feb 28 to Mar 14Transplant outside: Apr 25 to May 9
Start indoors: Mar 14 to Mar 28Transplant outside: Jun 6 to Jun 20
Start indoors: Mar 14 to Mar 28Transplant outside: Jun 6 to Jun 20
Start indoors: Mar 28 to Apr 11Transplant outside: May 30 to Jun 13
Start indoors: Mar 28 to Apr 11Transplant outside: May 2 to May 16Sow outdoors: Apr 25 to May 30Plant for fall: Jul 28 to Aug 25
Start indoors: Mar 28 to Apr 11Transplant outside: Apr 25 to May 9Sow outdoors: Apr 25 to May 9Plant for fall: Jul 14 to Aug 4
Start indoors: Mar 28 to Apr 11Transplant outside: May 9 to May 23Plant for fall: Jun 16 to Jul 7
Start indoors: Mar 28 to Apr 11Transplant outside: May 2 to May 16Plant for fall: Jun 16 to Jul 7
Start indoors: Mar 28 to Apr 11Transplant outside: May 9 to May 23Plant for fall: Jun 16 to Jul 7
Start indoors: Apr 11 to Apr 25Transplant outside: Jun 13 to Jun 27Sow outdoors: Jun 13 to Jun 27
Start indoors: Apr 11 to Apr 25Transplant outside: May 30 to Jun 13
Sow outdoors: Apr 11 to May 2Plant for fall: Jun 30 to Jul 21
Sow outdoors: Apr 11 to May 2Plant for fall: Jul 28 to Aug 18
Sow outdoors: Apr 18 to May 30Plant for fall: Aug 11 to Sep 1
Start indoors: Apr 25 to May 2Transplant outside: Jun 6 to Jun 13Sow outdoors: May 30 to Jun 13Plant for fall: Jul 7 to Jul 21
Start indoors: Apr 25 to May 2Sow outdoors: May 30 to Jun 13Plant for fall: Jul 14 to Jul 28
Start indoors: Apr 25 to May 2Sow outdoors: May 30 to Jun 13
Start indoors: Apr 25 to May 2Transplant outside: Jun 6 to Jun 20
Sow outdoors: May 2 to May 30Plant for fall: Jun 30 to Jul 14
Sow outdoors: May 2 to May 30Plant for fall: Jul 14 to Jul 28
Sow outdoors: May 2 to May 23
Sow outdoors: May 9 to Jun 6Plant for fall: Jul 14 to Jul 28
Sow outdoors: May 9 to May 30Plant for fall: Jul 28 to Aug 18
Sow outdoors: May 30 to Jun 20Plant for fall: Jul 7 to Jul 21
Sow outdoors: May 30 to Jun 13
Transplant outside: Jun 6 to Jun 27
Plant for fall: Sep 8 to Oct 13
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Roosevelt, UT
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 28 – Mar 14 | Apr 25 – May 9 | — | — |
| Peppers | Mar 14 – Mar 28 | Jun 6 – Jun 20 | — | — |
| Eggplant | Mar 14 – Mar 28 | Jun 6 – Jun 20 | — | — |
| Tomatoes | Mar 28 – Apr 11 | May 30 – Jun 13 | — | — |
| Lettuce | Mar 28 – Apr 11 | May 2 – May 16 | Apr 25 – May 30 | Jul 28 – Aug 25 |
| Kale | Mar 28 – Apr 11 | Apr 25 – May 9 | Apr 25 – May 9 | Jul 14 – Aug 4 |
| Broccoli | Mar 28 – Apr 11 | May 9 – May 23 | — | Jun 16 – Jul 7 |
| Cabbage | Mar 28 – Apr 11 | May 2 – May 16 | — | Jun 16 – Jul 7 |
| Cauliflower | Mar 28 – Apr 11 | May 9 – May 23 | — | Jun 16 – Jul 7 |
| Okra | Apr 11 – Apr 25 | Jun 13 – Jun 27 | Jun 13 – Jun 27 | — |
| Basil | Apr 11 – Apr 25 | May 30 – Jun 13 | — | — |
| Peas | — | — | Apr 11 – May 2 | Jun 30 – Jul 21 |
| Spinach | — | — | Apr 11 – May 2 | Jul 28 – Aug 18 |
| Radishes | — | — | Apr 18 – May 30 | Aug 11 – Sep 1 |
| Cucumbers | Apr 25 – May 2 | Jun 6 – Jun 13 | May 30 – Jun 13 | Jul 7 – Jul 21 |
| Zucchini & Summer Squash | Apr 25 – May 2 | — | May 30 – Jun 13 | Jul 14 – Jul 28 |
| Winter Squash & Pumpkins | Apr 25 – May 2 | — | May 30 – Jun 13 | — |
| Melons & Watermelon | Apr 25 – May 2 | Jun 6 – Jun 20 | — | — |
| Carrots | — | — | May 2 – May 30 | Jun 30 – Jul 14 |
| Beets | — | — | May 2 – May 30 | Jul 14 – Jul 28 |
| Potatoes | — | — | May 2 – May 23 | — |
| Swiss Chard | — | — | May 9 – Jun 6 | Jul 14 – Jul 28 |
| Cilantro | — | — | May 9 – May 30 | Jul 28 – Aug 18 |
| Green Beans | — | — | May 30 – Jun 20 | Jul 7 – Jul 21 |
| Sweet Corn | — | — | May 30 – Jun 13 | — |
| Sweet Potatoes | — | Jun 6 – Jun 27 | — | — |
| Garlic | — | — | — | Sep 8 – Oct 13 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Roosevelt Radio, UT weather station, 5 km away (elevation 5,013 ft (1,528 m)).
Frost dates near Roosevelt
- Fort Duchesne May 19 · Oct 2
- Myton May 7 · Oct 5
- Neola May 19 · Sep 29
- Bluebell May 31 · Sep 23
- Whiterocks May 19 · Sep 29
- Lapoint May 19 · Oct 2
- Tridell May 19 · Oct 2
- Altamont May 31 · Sep 23
- Randlett May 2 · Oct 3
- Altonah May 31 · Sep 23
Frequently asked questions
When is the last frost in Roosevelt, UT?
The median last spring frost in Roosevelt, UT is May 23. There is still about a 10% chance of frost after June 9, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Roosevelt, UT?
The median first fall frost is September 22, with about a 10% chance of frost before September 8.
How long is the growing season in Roosevelt, UT?
About 122 days between the median last spring frost and first fall frost.
What planting zone is Roosevelt, UT?
Roosevelt, UT is in USDA hardiness zone 5b.