Mountain View, WY frost dates
Last spring frostJun 14median date
First fall frostSep 9median date
Growing season87 daysfrost-free
Hardiness zone5bZone 5b
How Mountain View compares
- In 8 years out of 10, the last spring frost in Mountain View falls between May 31 and July 1, a 31-day window. The first fall frost falls between August 23 and September 21.
- The median last frost is 24 days later than the Wyoming median of May 21.
- Its 87-day growing season is longer than 5% of the 153 Wyoming places with a regular frost season (state median 125 days).
- The last frost is 44 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 206 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 31 |
| 50% (median) | June 14 |
| 10% (safe for tender plants) | July 1 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | August 23 |
| 50% (median) | September 9 |
| 90% (late) | September 21 |
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 Mountain View, WY
Mountain View, WY frost dates — last frost Jun 14, first frost Sep 9, zone 5b. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Mar 22 to Apr 5Transplant outside: May 17 to May 31
Start indoors: Apr 5 to Apr 19Transplant outside: Jun 28 to Jul 12
Start indoors: Apr 5 to Apr 19Transplant outside: Jun 28 to Jul 12
Start indoors: Apr 19 to May 3Transplant outside: Jun 21 to Jul 5
Start indoors: Apr 19 to May 3Transplant outside: May 24 to Jun 7Sow outdoors: May 17 to Jun 21Plant for fall: Jul 15 to Aug 12
Start indoors: Apr 19 to May 3Transplant outside: May 17 to May 31Sow outdoors: May 17 to May 31Plant for fall: Jul 1 to Jul 22
Start indoors: Apr 19 to May 3Transplant outside: May 31 to Jun 14
Start indoors: Apr 19 to May 3Transplant outside: May 24 to Jun 7
Start indoors: Apr 19 to May 3Transplant outside: May 31 to Jun 14
Start indoors: May 3 to May 17Transplant outside: Jul 5 to Jul 19Sow outdoors: Jul 5 to Jul 19
Start indoors: May 3 to May 17Transplant outside: Jun 21 to Jul 5
Sow outdoors: May 3 to May 24
Sow outdoors: May 3 to May 24Plant for fall: Jul 15 to Aug 5
Sow outdoors: May 10 to Jun 21Plant for fall: Jul 29 to Aug 19
Start indoors: May 17 to May 24Transplant outside: Jun 28 to Jul 5Sow outdoors: Jun 21 to Jul 5
Start indoors: May 17 to May 24Sow outdoors: Jun 21 to Jul 5
Start indoors: May 17 to May 24Sow outdoors: Jun 21 to Jul 5
Start indoors: May 17 to May 24Transplant outside: Jun 28 to Jul 12
Sow outdoors: May 24 to Jun 21
Sow outdoors: May 24 to Jun 21
Sow outdoors: May 24 to Jun 14
Sow outdoors: May 31 to Jun 28
Sow outdoors: May 31 to Jun 21Plant for fall: Jul 15 to Aug 5
Sow outdoors: Jun 21 to Jul 12
Sow outdoors: Jun 21 to Jul 5
Transplant outside: Jun 28 to Jul 19
Plant for fall: Aug 26 to Sep 30
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Mountain View, WY
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 22 – Apr 5 | May 17 – May 31 | — | — |
| Peppers Warning: Your frost-free season is about 87 days, which is tight for peppers (75+ days). Choose early varieties and use transplants or row covers. | Apr 5 – Apr 19 | Jun 28 – Jul 12 | — | — |
| Eggplant Warning: Your frost-free season is about 87 days, which is tight for eggplant (75+ days). Choose early varieties and use transplants or row covers. | Apr 5 – Apr 19 | Jun 28 – Jul 12 | — | — |
| Tomatoes | Apr 19 – May 3 | Jun 21 – Jul 5 | — | — |
| Lettuce | Apr 19 – May 3 | May 24 – Jun 7 | May 17 – Jun 21 | Jul 15 – Aug 12 |
| Kale | Apr 19 – May 3 | May 17 – May 31 | May 17 – May 31 | Jul 1 – Jul 22 |
| Broccoli | Apr 19 – May 3 | May 31 – Jun 14 | — | — |
| Cabbage | Apr 19 – May 3 | May 24 – Jun 7 | — | — |
| Cauliflower | Apr 19 – May 3 | May 31 – Jun 14 | — | — |
| Okra | May 3 – May 17 | Jul 5 – Jul 19 | Jul 5 – Jul 19 | — |
| Basil | May 3 – May 17 | Jun 21 – Jul 5 | — | — |
| Peas | — | — | May 3 – May 24 | — |
| Spinach | — | — | May 3 – May 24 | Jul 15 – Aug 5 |
| Radishes | — | — | May 10 – Jun 21 | Jul 29 – Aug 19 |
| Cucumbers | May 17 – May 24 | Jun 28 – Jul 5 | Jun 21 – Jul 5 | — |
| Zucchini & Summer Squash | May 17 – May 24 | — | Jun 21 – Jul 5 | — |
| Winter Squash & Pumpkins Warning: Your frost-free season is about 87 days, which is tight for winter squash & pumpkins (100+ days). Choose early varieties and use transplants or row covers. | May 17 – May 24 | — | Jun 21 – Jul 5 | — |
| Melons & Watermelon Warning: Your frost-free season is about 87 days, which is tight for melons & watermelon (85+ days). Choose early varieties and use transplants or row covers. | May 17 – May 24 | Jun 28 – Jul 12 | — | — |
| Carrots | — | — | May 24 – Jun 21 | — |
| Beets | — | — | May 24 – Jun 21 | — |
| Potatoes | — | — | May 24 – Jun 14 | — |
| Swiss Chard | — | — | May 31 – Jun 28 | — |
| Cilantro | — | — | May 31 – Jun 21 | Jul 15 – Aug 5 |
| Green Beans | — | — | Jun 21 – Jul 12 | — |
| Sweet Corn Warning: Your frost-free season is about 87 days, which is tight for sweet corn (80+ days). Choose early varieties and use transplants or row covers. | — | — | Jun 21 – Jul 5 | — |
| Sweet Potatoes Warning: Your frost-free season is about 87 days, which is tight for sweet potatoes (100+ days). Choose early varieties and use transplants or row covers. | — | Jun 28 – Jul 19 | — | — |
| Garlic | — | — | — | Aug 26 – Sep 30 |
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 Mtn View, WY weather station, 4 km away (elevation 6,801 ft (2,073 m)).
Frost dates near Mountain View
- Fort Bridger Jun 14 · Sep 9
- Lyman Jun 14 · Sep 9
- Robertson Jun 14 · Sep 9
- Lonetree Jun 14 · Sep 9
- Mc Kinnon May 22 · Sep 29
- Granger May 25 · Sep 27
- Evanston Jun 12 · Sep 12
- Little America May 25 · Sep 27
- Opal frost any month
- Diamondville frost any month
Frequently asked questions
When is the last frost in Mountain View, WY?
The median last spring frost in Mountain View, WY is June 14. There is still about a 10% chance of frost after July 1, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Mountain View, WY?
The median first fall frost is September 9, with about a 10% chance of frost before August 23.
How long is the growing season in Mountain View, WY?
About 87 days between the median last spring frost and first fall frost.
What planting zone is Mountain View, WY?
Mountain View, WY is in USDA hardiness zone 5b.