Frost dates for Hot Sulphur Springs, CO
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 12
typical year
Safe to plant
June 25
frost is over in 9 of 10 years
First fall frost
September 10
typical year
Growing season
89 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 | – | May 15 – 29 | – |
| Spinach | – | May 1 – 22 | Jul 16 – 30 |
| Lettuce | – | May 15 – Jun 5 | Jul 16 – 30 |
| Radishes | – | May 15 – Jun 26 | Jul 30 – Aug 13 |
| Onions | – | May 15 – 29 | – |
| Potatoes | Season usually too short. Try a quick variety or row covers. | ||
| Carrots | – | May 22 – Jun 12 | Jun 18 – Jul 2 |
| Beets | – | May 15 – 29 | Jul 2 – 16 |
| Kale | Apr 3 – 17 | May 15 – 29 | Jul 2 – 16 |
| Broccoli | Apr 3 – 17 | May 29 – Jun 12 | Jul 2 – 16 |
| Cabbage | Mar 20 – Apr 3 | May 15 – 29 | Jul 2 – 16 |
| Garlic | – | – | Jul 30 – Aug 20 |
| Warm-season crops | |||
| Tomatoes | Apr 30 – May 14 | Jun 25 – Jul 9 | – |
| Peppers | Season usually too short. Try a quick variety or row covers. | ||
| Cucumbers | – | Jun 25 – Jul 16 | – |
| Zucchini | – | Jun 25 – Jul 23 | – |
| Pumpkins | Season usually too short. Try a quick variety or row covers. | ||
| Green beans | – | Jun 25 – Jul 2 | – |
| Sweet corn | Season usually too short. Try a quick variety or row covers. | ||
| Basil | May 21 – Jun 4 | Jul 2 – 9 | – |
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 | June 25 | June 12 | May 31 |
| Fall frost before | August 31 | September 10 | September 21 |
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 May 26 (June 9 in a late year), and the first one in fall around September 20.
Towns that use these dates
This is the nearest NOAA station with frost records for 1 town.
Hot Sulphur Springs
Where these dates come from
NOAA weather station WILLIAMS FORK DAM, CO US (USC00059096), 1991–2020 climate normals. It's the nearest station for 2 zip codes, all within 10 miles:
80451, 80468
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.