Frost dates for 82070 — Laramie, WY
Last spring frostJun 2median date
First fall frostSep 15median date
Growing season105 daysfrost-free
Hardiness zone4bZone 4b
How Laramie compares
- In 8 years out of 10, the last spring frost in Laramie falls between May 21 and June 18, a 28-day window. The first fall frost falls between September 3 and September 27.
- The median last frost is 12 days later than the Wyoming median of May 21.
- Its 105-day growing season is longer than 17% of the 153 Wyoming places with a regular frost season (state median 125 days).
- The last frost is 25 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 212 nights a year at or below 32°F.
- Compared with Cheyenne, WY, 90 km away, the last frost here is 21 days later than there and the growing season is 37 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 21 |
| 50% (median) | June 2 |
| 10% (safe for tender plants) | June 18 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 3 |
| 50% (median) | September 15 |
| 90% (late) | September 27 |
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 Laramie, WY
Frost dates for 82070 — Laramie, WY — last frost Jun 2, first frost Sep 15, zone 4b. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Mar 10 to Mar 24Transplant outside: May 5 to May 19
Start indoors: Mar 24 to Apr 7Transplant outside: Jun 16 to Jun 30
Start indoors: Mar 24 to Apr 7Transplant outside: Jun 16 to Jun 30
Start indoors: Apr 7 to Apr 21Transplant outside: Jun 9 to Jun 23
Start indoors: Apr 7 to Apr 21Transplant outside: May 12 to May 26Sow outdoors: May 5 to Jun 9Plant for fall: Jul 21 to Aug 18
Start indoors: Apr 7 to Apr 21Transplant outside: May 5 to May 19Sow outdoors: May 5 to May 19Plant for fall: Jul 7 to Jul 28
Start indoors: Apr 7 to Apr 21Transplant outside: May 19 to Jun 2
Start indoors: Apr 7 to Apr 21Transplant outside: May 12 to May 26
Start indoors: Apr 7 to Apr 21Transplant outside: May 19 to Jun 2
Start indoors: Apr 21 to May 5Transplant outside: Jun 23 to Jul 7Sow outdoors: Jun 23 to Jul 7
Start indoors: Apr 21 to May 5Transplant outside: Jun 9 to Jun 23
Sow outdoors: Apr 21 to May 12Plant for fall: Jun 23 to Jul 14
Sow outdoors: Apr 21 to May 12Plant for fall: Jul 21 to Aug 11
Sow outdoors: Apr 28 to Jun 9Plant for fall: Aug 4 to Aug 25
Start indoors: May 5 to May 12Transplant outside: Jun 16 to Jun 23Sow outdoors: Jun 9 to Jun 23
Start indoors: May 5 to May 12Sow outdoors: Jun 9 to Jun 23
Start indoors: May 5 to May 12Sow outdoors: Jun 9 to Jun 23
Start indoors: May 5 to May 12Transplant outside: Jun 16 to Jun 30
Sow outdoors: May 12 to Jun 9
Sow outdoors: May 12 to Jun 9Plant for fall: Jul 7 to Jul 21
Sow outdoors: May 12 to Jun 2
Sow outdoors: May 19 to Jun 16Plant for fall: Jul 7 to Jul 21
Sow outdoors: May 19 to Jun 9Plant for fall: Jul 21 to Aug 11
Sow outdoors: Jun 9 to Jun 30
Sow outdoors: Jun 9 to Jun 23
Transplant outside: Jun 16 to Jul 7
Plant for fall: Sep 1 to Oct 6
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Laramie, WY
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 10 – Mar 24 | May 5 – May 19 | — | — |
| Peppers | Mar 24 – Apr 7 | Jun 16 – Jun 30 | — | — |
| Eggplant | Mar 24 – Apr 7 | Jun 16 – Jun 30 | — | — |
| Tomatoes | Apr 7 – Apr 21 | Jun 9 – Jun 23 | — | — |
| Lettuce | Apr 7 – Apr 21 | May 12 – May 26 | May 5 – Jun 9 | Jul 21 – Aug 18 |
| Kale | Apr 7 – Apr 21 | May 5 – May 19 | May 5 – May 19 | Jul 7 – Jul 28 |
| Broccoli | Apr 7 – Apr 21 | May 19 – Jun 2 | — | — |
| Cabbage | Apr 7 – Apr 21 | May 12 – May 26 | — | — |
| Cauliflower | Apr 7 – Apr 21 | May 19 – Jun 2 | — | — |
| Okra | Apr 21 – May 5 | Jun 23 – Jul 7 | Jun 23 – Jul 7 | — |
| Basil | Apr 21 – May 5 | Jun 9 – Jun 23 | — | — |
| Peas | — | — | Apr 21 – May 12 | Jun 23 – Jul 14 |
| Spinach | — | — | Apr 21 – May 12 | Jul 21 – Aug 11 |
| Radishes | — | — | Apr 28 – Jun 9 | Aug 4 – Aug 25 |
| Cucumbers | May 5 – May 12 | Jun 16 – Jun 23 | Jun 9 – Jun 23 | — |
| Zucchini & Summer Squash | May 5 – May 12 | — | Jun 9 – Jun 23 | — |
| Winter Squash & Pumpkins Warning: Your frost-free season is about 105 days, which is tight for winter squash & pumpkins (100+ days). Choose early varieties and use transplants or row covers. | May 5 – May 12 | — | Jun 9 – Jun 23 | — |
| Melons & Watermelon | May 5 – May 12 | Jun 16 – Jun 30 | — | — |
| Carrots | — | — | May 12 – Jun 9 | — |
| Beets | — | — | May 12 – Jun 9 | Jul 7 – Jul 21 |
| Potatoes | — | — | May 12 – Jun 2 | — |
| Swiss Chard | — | — | May 19 – Jun 16 | Jul 7 – Jul 21 |
| Cilantro | — | — | May 19 – Jun 9 | Jul 21 – Aug 11 |
| Green Beans | — | — | Jun 9 – Jun 30 | — |
| Sweet Corn | — | — | Jun 9 – Jun 23 | — |
| Sweet Potatoes Warning: Your frost-free season is about 105 days, which is tight for sweet potatoes (100+ days). Choose early varieties and use transplants or row covers. | — | Jun 16 – Jul 7 | — | — |
| Garlic | — | — | — | Sep 1 – Oct 6 |
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 Laramie Rgnl Ap, WY weather station, 18 km away (elevation 7,267 ft (2,215 m)).
ZIP codes in Laramie: 82070 82071 82072 82073
Frost dates near Laramie
- Centennial Jun 2 · Sep 19
- Bosler Jun 7 · Sep 4
- Rock River Jun 1 · Sep 8
- Jelm frost any month
- Tie Siding May 31 · Sep 19
- Buford May 27 · Sep 19
- Horse Creek May 27 · Sep 19
- Elk Mountain May 28 · Sep 13
Frequently asked questions
When is the last frost in Laramie, WY?
The median last spring frost in Laramie, WY is June 2. There is still about a 10% chance of frost after June 18, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Laramie, WY?
The median first fall frost is September 15, with about a 10% chance of frost before September 3.
How long is the growing season in Laramie, WY?
About 105 days between the median last spring frost and first fall frost.
What planting zone is Laramie, WY?
Laramie, WY is in USDA hardiness zone 4b.