Rozet, WY frost dates
Last spring frostMay 15median date
First fall frostOct 1median date
Growing season139 daysfrost-free
Hardiness zone4bZone 4b
How Rozet compares
- In 8 years out of 10, the last spring frost in Rozet falls between May 1 and May 27, a 26-day window. The first fall frost falls between September 15 and October 14.
- The median last frost is 6 days earlier than the Wyoming median of May 21.
- Its 139-day growing season is longer than 74% of the 153 Wyoming places with a regular frost season (state median 125 days).
- The last frost is 7 days later than the zone 4b median of May 8. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 4b chart.
- The weather station records an average of 174 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 1 |
| 50% (median) | May 15 |
| 10% (safe for tender plants) | May 27 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 15 |
| 50% (median) | October 1 |
| 90% (late) | October 14 |
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 Rozet, WY
Rozet, WY frost dates — last frost May 15, first frost Oct 1, zone 4b. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Feb 20 to Mar 6Transplant outside: Apr 17 to May 1
Start indoors: Mar 6 to Mar 20Transplant outside: May 29 to Jun 12
Start indoors: Mar 6 to Mar 20Transplant outside: May 29 to Jun 12
Start indoors: Mar 20 to Apr 3Transplant outside: May 22 to Jun 5
Start indoors: Mar 20 to Apr 3Transplant outside: Apr 24 to May 8Sow outdoors: Apr 17 to May 22Plant for fall: Aug 6 to Sep 3
Start indoors: Mar 20 to Apr 3Transplant outside: Apr 17 to May 1Sow outdoors: Apr 17 to May 1Plant for fall: Jul 23 to Aug 13
Start indoors: Mar 20 to Apr 3Transplant outside: May 1 to May 15Plant for fall: Jun 25 to Jul 16
Start indoors: Mar 20 to Apr 3Transplant outside: Apr 24 to May 8Plant for fall: Jun 25 to Jul 16
Start indoors: Mar 20 to Apr 3Transplant outside: May 1 to May 15Plant for fall: Jun 25 to Jul 16
Start indoors: Apr 3 to Apr 17Transplant outside: Jun 5 to Jun 19Sow outdoors: Jun 5 to Jun 19
Start indoors: Apr 3 to Apr 17Transplant outside: May 22 to Jun 5
Sow outdoors: Apr 3 to Apr 24Plant for fall: Jul 9 to Jul 30
Sow outdoors: Apr 3 to Apr 24Plant for fall: Aug 6 to Aug 27
Sow outdoors: Apr 10 to May 22Plant for fall: Aug 20 to Sep 10
Start indoors: Apr 17 to Apr 24Transplant outside: May 29 to Jun 5Sow outdoors: May 22 to Jun 5Plant for fall: Jul 16 to Jul 30
Start indoors: Apr 17 to Apr 24Sow outdoors: May 22 to Jun 5Plant for fall: Jul 23 to Aug 6
Start indoors: Apr 17 to Apr 24Sow outdoors: May 22 to Jun 5
Start indoors: Apr 17 to Apr 24Transplant outside: May 29 to Jun 12
Sow outdoors: Apr 24 to May 22Plant for fall: Jul 9 to Jul 23
Sow outdoors: Apr 24 to May 22Plant for fall: Jul 23 to Aug 6
Sow outdoors: Apr 24 to May 15
Sow outdoors: May 1 to May 29Plant for fall: Jul 23 to Aug 6
Sow outdoors: May 1 to May 22Plant for fall: Aug 6 to Aug 27
Sow outdoors: May 22 to Jun 12Plant for fall: Jul 16 to Jul 30
Sow outdoors: May 22 to Jun 5
Transplant outside: May 29 to Jun 19
Plant for fall: Sep 17 to Oct 22
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Rozet, WY
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 20 – Mar 6 | Apr 17 – May 1 | — | — |
| Peppers | Mar 6 – Mar 20 | May 29 – Jun 12 | — | — |
| Eggplant | Mar 6 – Mar 20 | May 29 – Jun 12 | — | — |
| Tomatoes | Mar 20 – Apr 3 | May 22 – Jun 5 | — | — |
| Lettuce | Mar 20 – Apr 3 | Apr 24 – May 8 | Apr 17 – May 22 | Aug 6 – Sep 3 |
| Kale | Mar 20 – Apr 3 | Apr 17 – May 1 | Apr 17 – May 1 | Jul 23 – Aug 13 |
| Broccoli | Mar 20 – Apr 3 | May 1 – May 15 | — | Jun 25 – Jul 16 |
| Cabbage | Mar 20 – Apr 3 | Apr 24 – May 8 | — | Jun 25 – Jul 16 |
| Cauliflower | Mar 20 – Apr 3 | May 1 – May 15 | — | Jun 25 – Jul 16 |
| Okra | Apr 3 – Apr 17 | Jun 5 – Jun 19 | Jun 5 – Jun 19 | — |
| Basil | Apr 3 – Apr 17 | May 22 – Jun 5 | — | — |
| Peas | — | — | Apr 3 – Apr 24 | Jul 9 – Jul 30 |
| Spinach | — | — | Apr 3 – Apr 24 | Aug 6 – Aug 27 |
| Radishes | — | — | Apr 10 – May 22 | Aug 20 – Sep 10 |
| Cucumbers | Apr 17 – Apr 24 | May 29 – Jun 5 | May 22 – Jun 5 | Jul 16 – Jul 30 |
| Zucchini & Summer Squash | Apr 17 – Apr 24 | — | May 22 – Jun 5 | Jul 23 – Aug 6 |
| Winter Squash & Pumpkins | Apr 17 – Apr 24 | — | May 22 – Jun 5 | — |
| Melons & Watermelon | Apr 17 – Apr 24 | May 29 – Jun 12 | — | — |
| Carrots | — | — | Apr 24 – May 22 | Jul 9 – Jul 23 |
| Beets | — | — | Apr 24 – May 22 | Jul 23 – Aug 6 |
| Potatoes | — | — | Apr 24 – May 15 | — |
| Swiss Chard | — | — | May 1 – May 29 | Jul 23 – Aug 6 |
| Cilantro | — | — | May 1 – May 22 | Aug 6 – Aug 27 |
| Green Beans | — | — | May 22 – Jun 12 | Jul 16 – Jul 30 |
| Sweet Corn | — | — | May 22 – Jun 5 | — |
| Sweet Potatoes | — | May 29 – Jun 19 | — | — |
| Garlic | — | — | — | Sep 17 – Oct 22 |
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 Gillette 4se, WY weather station, 17 km away (elevation 4,639 ft (1,414 m)).
Frost dates near Rozet
- Gillette May 15 · Oct 1
- Moorcroft May 23 · Sep 20
- Gillette (Campbell) May 25 · Sep 23
- Devils Tower May 23 · Sep 20
- Weston May 23 · Sep 18
- Upton May 20 · Sep 23
- Wright May 25 · Sep 23
- Recluse May 21 · Sep 23
- Hulett May 17 · Sep 23
- Sundance May 21 · Sep 25
Frequently asked questions
When is the last frost in Rozet, WY?
The median last spring frost in Rozet, WY is May 15. There is still about a 10% chance of frost after May 27, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Rozet, WY?
The median first fall frost is October 1, with about a 10% chance of frost before September 15.
How long is the growing season in Rozet, WY?
About 139 days between the median last spring frost and first fall frost.
What planting zone is Rozet, WY?
Rozet, WY is in USDA hardiness zone 4b.