Beulah, WY frost dates
Last spring frostMay 17median date
First fall frostSep 27median date
Growing season133 daysfrost-free
Hardiness zone5aZone 5a
How Beulah compares
- In 8 years out of 10, the last spring frost in Beulah falls between May 5 and May 30, a 25-day window. The first fall frost falls between September 11 and October 10.
- The median last frost is 4 days earlier than the Wyoming median of May 21.
- Its 133-day growing season is longer than 64% of the 153 Wyoming places with a regular frost season (state median 125 days).
- The last frost is 14 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 157 nights a year at or below 32°F.
- Compared with Rapid City, SD, 83 km away, the last frost here is 14 days later than there and the growing season is 25 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 5 |
| 50% (median) | May 17 |
| 10% (safe for tender plants) | May 30 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 11 |
| 50% (median) | September 27 |
| 90% (late) | October 10 |
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 Beulah, WY
Beulah, WY frost dates — last frost May 17, first frost Sep 27, zone 5a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Feb 22 to Mar 8Transplant outside: Apr 19 to May 3
Start indoors: Mar 8 to Mar 22Transplant outside: May 31 to Jun 14
Start indoors: Mar 8 to Mar 22Transplant outside: May 31 to Jun 14
Start indoors: Mar 22 to Apr 5Transplant outside: May 24 to Jun 7
Start indoors: Mar 22 to Apr 5Transplant outside: Apr 26 to May 10Sow outdoors: Apr 19 to May 24Plant for fall: Aug 2 to Aug 30
Start indoors: Mar 22 to Apr 5Transplant outside: Apr 19 to May 3Sow outdoors: Apr 19 to May 3Plant for fall: Jul 19 to Aug 9
Start indoors: Mar 22 to Apr 5Transplant outside: May 3 to May 17Plant for fall: Jun 21 to Jul 12
Start indoors: Mar 22 to Apr 5Transplant outside: Apr 26 to May 10Plant for fall: Jun 21 to Jul 12
Start indoors: Mar 22 to Apr 5Transplant outside: May 3 to May 17Plant for fall: Jun 21 to Jul 12
Start indoors: Apr 5 to Apr 19Transplant outside: Jun 7 to Jun 21Sow outdoors: Jun 7 to Jun 21
Start indoors: Apr 5 to Apr 19Transplant outside: May 24 to Jun 7
Sow outdoors: Apr 5 to Apr 26Plant for fall: Jul 5 to Jul 26
Sow outdoors: Apr 5 to Apr 26Plant for fall: Aug 2 to Aug 23
Sow outdoors: Apr 12 to May 24Plant for fall: Aug 16 to Sep 6
Start indoors: Apr 19 to Apr 26Transplant outside: May 31 to Jun 7Sow outdoors: May 24 to Jun 7Plant for fall: Jul 12 to Jul 26
Start indoors: Apr 19 to Apr 26Sow outdoors: May 24 to Jun 7Plant for fall: Jul 19 to Aug 2
Start indoors: Apr 19 to Apr 26Sow outdoors: May 24 to Jun 7
Start indoors: Apr 19 to Apr 26Transplant outside: May 31 to Jun 14
Sow outdoors: Apr 26 to May 24Plant for fall: Jul 5 to Jul 19
Sow outdoors: Apr 26 to May 24Plant for fall: Jul 19 to Aug 2
Sow outdoors: Apr 26 to May 17
Sow outdoors: May 3 to May 31Plant for fall: Jul 19 to Aug 2
Sow outdoors: May 3 to May 24Plant for fall: Aug 2 to Aug 23
Sow outdoors: May 24 to Jun 14Plant for fall: Jul 12 to Jul 26
Sow outdoors: May 24 to Jun 7
Transplant outside: May 31 to Jun 21
Plant for fall: Sep 13 to Oct 18
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Beulah, WY
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 22 – Mar 8 | Apr 19 – May 3 | — | — |
| Peppers | Mar 8 – Mar 22 | May 31 – Jun 14 | — | — |
| Eggplant | Mar 8 – Mar 22 | May 31 – Jun 14 | — | — |
| Tomatoes | Mar 22 – Apr 5 | May 24 – Jun 7 | — | — |
| Lettuce | Mar 22 – Apr 5 | Apr 26 – May 10 | Apr 19 – May 24 | Aug 2 – Aug 30 |
| Kale | Mar 22 – Apr 5 | Apr 19 – May 3 | Apr 19 – May 3 | Jul 19 – Aug 9 |
| Broccoli | Mar 22 – Apr 5 | May 3 – May 17 | — | Jun 21 – Jul 12 |
| Cabbage | Mar 22 – Apr 5 | Apr 26 – May 10 | — | Jun 21 – Jul 12 |
| Cauliflower | Mar 22 – Apr 5 | May 3 – May 17 | — | Jun 21 – Jul 12 |
| Okra | Apr 5 – Apr 19 | Jun 7 – Jun 21 | Jun 7 – Jun 21 | — |
| Basil | Apr 5 – Apr 19 | May 24 – Jun 7 | — | — |
| Peas | — | — | Apr 5 – Apr 26 | Jul 5 – Jul 26 |
| Spinach | — | — | Apr 5 – Apr 26 | Aug 2 – Aug 23 |
| Radishes | — | — | Apr 12 – May 24 | Aug 16 – Sep 6 |
| Cucumbers | Apr 19 – Apr 26 | May 31 – Jun 7 | May 24 – Jun 7 | Jul 12 – Jul 26 |
| Zucchini & Summer Squash | Apr 19 – Apr 26 | — | May 24 – Jun 7 | Jul 19 – Aug 2 |
| Winter Squash & Pumpkins | Apr 19 – Apr 26 | — | May 24 – Jun 7 | — |
| Melons & Watermelon | Apr 19 – Apr 26 | May 31 – Jun 14 | — | — |
| Carrots | — | — | Apr 26 – May 24 | Jul 5 – Jul 19 |
| Beets | — | — | Apr 26 – May 24 | Jul 19 – Aug 2 |
| Potatoes | — | — | Apr 26 – May 17 | — |
| Swiss Chard | — | — | May 3 – May 31 | Jul 19 – Aug 2 |
| Cilantro | — | — | May 3 – May 24 | Aug 2 – Aug 23 |
| Green Beans | — | — | May 24 – Jun 14 | Jul 12 – Jul 26 |
| Sweet Corn | — | — | May 24 – Jun 7 | — |
| Sweet Potatoes | — | May 31 – Jun 21 | — | — |
| Garlic | — | — | — | Sep 13 – Oct 18 |
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 Bear Ridge, SD weather station, 6 km away (elevation 3,901 ft (1,189 m)).
Frost dates near Beulah
- Aladdin May 7 · Oct 3
- Sundance May 21 · Sep 25
- Alva May 17 · Sep 23
- Hulett May 17 · Sep 23
- Devils Tower May 23 · Sep 20
- Four Corners May 13 · Oct 3
- Moorcroft May 23 · Sep 20
- Osage May 20 · Sep 23
- Upton May 20 · Sep 23
- Newcastle May 13 · Oct 3
Frequently asked questions
When is the last frost in Beulah, WY?
The median last spring frost in Beulah, WY is May 17. There is still about a 10% chance of frost after May 30, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Beulah, WY?
The median first fall frost is September 27, with about a 10% chance of frost before September 11.
How long is the growing season in Beulah, WY?
About 133 days between the median last spring frost and first fall frost.
What planting zone is Beulah, WY?
Beulah, WY is in USDA hardiness zone 5a.