Wright, WY frost dates
Last spring frostMay 25median date
First fall frostSep 23median date
Growing season121 daysfrost-free
Hardiness zone5aZone 5a
How Wright compares
- In 8 years out of 10, the last spring frost in Wright falls between May 14 and June 8, a 25-day window. The first fall frost falls between September 8 and October 5.
- The median last frost is 4 days later than the Wyoming median of May 21.
- Its 121-day growing season is longer than 38% of the 153 Wyoming places with a regular frost season (state median 125 days).
- The last frost is 22 days later than the zone 5a median of May 3. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 5a chart.
- The weather station records an average of 187 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 14 |
| 50% (median) | May 25 |
| 10% (safe for tender plants) | June 8 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 8 |
| 50% (median) | September 23 |
| 90% (late) | October 5 |
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 Wright, WY
Wright, WY frost dates — last frost May 25, first frost Sep 23, zone 5a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Mar 2 to Mar 16Transplant outside: Apr 27 to May 11
Start indoors: Mar 16 to Mar 30Transplant outside: Jun 8 to Jun 22
Start indoors: Mar 16 to Mar 30Transplant outside: Jun 8 to Jun 22
Start indoors: Mar 30 to Apr 13Transplant outside: Jun 1 to Jun 15
Start indoors: Mar 30 to Apr 13Transplant outside: May 4 to May 18Sow outdoors: Apr 27 to Jun 1Plant for fall: Jul 29 to Aug 26
Start indoors: Mar 30 to Apr 13Transplant outside: Apr 27 to May 11Sow outdoors: Apr 27 to May 11Plant for fall: Jul 15 to Aug 5
Start indoors: Mar 30 to Apr 13Transplant outside: May 11 to May 25Plant for fall: Jun 17 to Jul 8
Start indoors: Mar 30 to Apr 13Transplant outside: May 4 to May 18Plant for fall: Jun 17 to Jul 8
Start indoors: Mar 30 to Apr 13Transplant outside: May 11 to May 25Plant for fall: Jun 17 to Jul 8
Start indoors: Apr 13 to Apr 27Transplant outside: Jun 15 to Jun 29Sow outdoors: Jun 15 to Jun 29
Start indoors: Apr 13 to Apr 27Transplant outside: Jun 1 to Jun 15
Sow outdoors: Apr 13 to May 4Plant for fall: Jul 1 to Jul 22
Sow outdoors: Apr 13 to May 4Plant for fall: Jul 29 to Aug 19
Sow outdoors: Apr 20 to Jun 1Plant for fall: Aug 12 to Sep 2
Start indoors: Apr 27 to May 4Transplant outside: Jun 8 to Jun 15Sow outdoors: Jun 1 to Jun 15Plant for fall: Jul 8 to Jul 22
Start indoors: Apr 27 to May 4Sow outdoors: Jun 1 to Jun 15Plant for fall: Jul 15 to Jul 29
Start indoors: Apr 27 to May 4Sow outdoors: Jun 1 to Jun 15
Start indoors: Apr 27 to May 4Transplant outside: Jun 8 to Jun 22
Sow outdoors: May 4 to Jun 1Plant for fall: Jul 1 to Jul 15
Sow outdoors: May 4 to Jun 1Plant for fall: Jul 15 to Jul 29
Sow outdoors: May 4 to May 25
Sow outdoors: May 11 to Jun 8Plant for fall: Jul 15 to Jul 29
Sow outdoors: May 11 to Jun 1Plant for fall: Jul 29 to Aug 19
Sow outdoors: Jun 1 to Jun 22Plant for fall: Jul 8 to Jul 22
Sow outdoors: Jun 1 to Jun 15
Transplant outside: Jun 8 to Jun 29
Plant for fall: Sep 9 to Oct 14
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Wright, WY
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 2 – Mar 16 | Apr 27 – May 11 | — | — |
| Peppers | Mar 16 – Mar 30 | Jun 8 – Jun 22 | — | — |
| Eggplant | Mar 16 – Mar 30 | Jun 8 – Jun 22 | — | — |
| Tomatoes | Mar 30 – Apr 13 | Jun 1 – Jun 15 | — | — |
| Lettuce | Mar 30 – Apr 13 | May 4 – May 18 | Apr 27 – Jun 1 | Jul 29 – Aug 26 |
| Kale | Mar 30 – Apr 13 | Apr 27 – May 11 | Apr 27 – May 11 | Jul 15 – Aug 5 |
| Broccoli | Mar 30 – Apr 13 | May 11 – May 25 | — | Jun 17 – Jul 8 |
| Cabbage | Mar 30 – Apr 13 | May 4 – May 18 | — | Jun 17 – Jul 8 |
| Cauliflower | Mar 30 – Apr 13 | May 11 – May 25 | — | Jun 17 – Jul 8 |
| Okra | Apr 13 – Apr 27 | Jun 15 – Jun 29 | Jun 15 – Jun 29 | — |
| Basil | Apr 13 – Apr 27 | Jun 1 – Jun 15 | — | — |
| Peas | — | — | Apr 13 – May 4 | Jul 1 – Jul 22 |
| Spinach | — | — | Apr 13 – May 4 | Jul 29 – Aug 19 |
| Radishes | — | — | Apr 20 – Jun 1 | Aug 12 – Sep 2 |
| Cucumbers | Apr 27 – May 4 | Jun 8 – Jun 15 | Jun 1 – Jun 15 | Jul 8 – Jul 22 |
| Zucchini & Summer Squash | Apr 27 – May 4 | — | Jun 1 – Jun 15 | Jul 15 – Jul 29 |
| Winter Squash & Pumpkins | Apr 27 – May 4 | — | Jun 1 – Jun 15 | — |
| Melons & Watermelon | Apr 27 – May 4 | Jun 8 – Jun 22 | — | — |
| Carrots | — | — | May 4 – Jun 1 | Jul 1 – Jul 15 |
| Beets | — | — | May 4 – Jun 1 | Jul 15 – Jul 29 |
| Potatoes | — | — | May 4 – May 25 | — |
| Swiss Chard | — | — | May 11 – Jun 8 | Jul 15 – Jul 29 |
| Cilantro | — | — | May 11 – Jun 1 | Jul 29 – Aug 19 |
| Green Beans | — | — | Jun 1 – Jun 22 | Jul 8 – Jul 22 |
| Sweet Corn | — | — | Jun 1 – Jun 15 | — |
| Sweet Potatoes | — | Jun 8 – Jun 29 | — | — |
| Garlic | — | — | — | Sep 9 – Oct 14 |
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 Wright 12w, WY weather station, 19 km away (elevation 5,020 ft (1,530 m)).
Frost dates near Wright
- Gillette (Campbell) May 25 · Sep 23
- Linch May 22 · Sep 22
- Gillette May 15 · Oct 1
- Rozet May 15 · Oct 1
- Edgerton May 22 · Sep 22
- Midwest May 22 · Sep 22
- Upton May 20 · Sep 23
- Kaycee May 18 · Sep 25
- Osage May 20 · Sep 23
- Moorcroft May 23 · Sep 20
Frequently asked questions
When is the last frost in Wright, WY?
The median last spring frost in Wright, WY is May 25. There is still about a 10% chance of frost after June 8, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Wright, WY?
The median first fall frost is September 23, with about a 10% chance of frost before September 8.
How long is the growing season in Wright, WY?
About 121 days between the median last spring frost and first fall frost.
What planting zone is Wright, WY?
Wright, WY is in USDA hardiness zone 5a.