Frost dates for Moose, WY
When the last spring frost and first fall frost usually come, and when to plant, from 30 years of NOAA weather records.
Last spring frost
June 24
typical year
Safe to plant
July 11
frost is over in 9 of 10 years
First fall frost
August 28
typical year
Growing season
63 days
frost-free, typical year
Frost watch this week
Tonight's and the next six nights' lows from the National Weather Service forecast for the station's location. Frost: 32°F or colder. Possible frost: 33–36°F, mostly in low spots on clear, still nights.
When to plant
Counted from this page's frost dates. Warm-season crops wait for the safe-to-plant date.
| Crop | Start indoors | Plant outside | Fall planting |
|---|---|---|---|
| Cool-season crops | |||
| Peas | Season usually too short. Try a quick variety or row covers. | ||
| Spinach | – | May 13 – Jun 3 | Jul 3 – 17 |
| Lettuce | – | May 27 – Jun 17 | Jul 3 – 17 |
| Radishes | – | May 27 – Jul 8 | Jul 17 – 31 |
| Onions | – | May 27 – Jun 10 | – |
| Potatoes | Season usually too short. Try a quick variety or row covers. | ||
| Carrots | – | Jun 3 – 24 | Jun 5 – 19 |
| Beets | – | May 27 – Jun 10 | Jun 19 – Jul 3 |
| Kale | Apr 15 – 29 | May 27 – Jun 10 | Jun 19 – Jul 3 |
| Broccoli | Apr 15 – 29 | Jun 10 – 24 | Jun 19 – Jul 3 |
| Cabbage | Apr 1 – 15 | May 27 – Jun 10 | Jun 19 – Jul 3 |
| Garlic | – | – | Jul 17 – Aug 7 |
| Warm-season crops | |||
| Tomatoes | Season usually too short. Try a quick variety or row covers. | ||
| Peppers | Season usually too short. Try a quick variety or row covers. | ||
| Cucumbers | Season usually too short. Try a quick variety or row covers. | ||
| Zucchini | Season usually too short. Try a quick variety or row covers. | ||
| Pumpkins | Season usually too short. Try a quick variety or row covers. | ||
| Green beans | Season usually too short. Try a quick variety or row covers. | ||
| Sweet corn | Season usually too short. Try a quick variety or row covers. | ||
| Basil | Season usually too short. Try a quick variety or row covers. | ||
Onions: from sets. Green beans: until 10 weeks before the first fall frost. Garlic: harvest next summer.
The year at a glance
Start indoors Plant outside Fall planting
The chance of frost, by date
| 1 year in 10 | Half of years | 9 years in 10 | |
|---|---|---|---|
| Spring frost after | July 11 | June 24 | June 8 |
| Fall frost before | August 8 | August 28 | September 12 |
Frost here means 32°F or colder. Read across: in 1 year in 10, spring frost carries on past the first date, which is why that date is the safe-to-plant date.
Hard freeze (28°F)
A hard freeze kills most garden plants, even hardy ones. The last one in spring usually comes around June 7 (June 23 in a late year), and the first one in fall around September 12.
Where these dates come from
NOAA weather station MOOSE 1 NNE, WY US (USW00004131), 1991–2020 climate normals. It's the nearest station for 2 zip codes, all within 30 miles:
83012, 83013
1 of these zip codes are more than 30 miles from the station, so their real frost dates may differ by a week or more.
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.