Frost dates for 82336Wamsutter, WY
The average last spring frost in Wamsutter is June 5 and the average first fall frost is September 14, giving a typical growing season of about 101 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Jun 5
- Average first fall frost
- Sep 14
- Growing season
- 101 days
Safer after Jun 23 (1-in-10 risk)
Possible by Sep 1 (1-in-10 risk)
Last frost typically in 220 days
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | — | — | 74 days | 100% |
| Frost / freeze (32°F) | May 20 · Jun 5 · Jun 23 | Sep 1 · Sep 14 · Sep 28 | 101 days | 100% |
| Hard freeze (28°F) | May 4 · May 20 · Jun 8 | Sep 11 · Sep 25 · Oct 10 | 126 days | 100% |
Planting calendar for Wamsutter
Planting windows from the University of Maryland Extension calendar, shifted to your average frost dates. Use them as a starting point and adjust for seed packet instructions and local conditions.
| Crop | Task | Window |
|---|---|---|
| Tomatoes | Start seeds indoors | May 5 – Jul 11 |
| Tomatoes | Transplant outdoors | Jun 21 – May 25 |
| Peppers | Start seeds indoors | May 5 – Jun 5 |
| Peppers | Transplant outdoors | Jul 5 – Aug 5 |
| Eggplant | Start seeds indoors | May 22 – Jun 20 |
| Eggplant | Transplant outdoors | Jul 5 – Aug 5 |
| Cucumbers | Sow outdoors | Jul 5 – Jun 4 |
| Summer squash | Sow outdoors | Jun 21 – Aug 5 |
| Winter squash & pumpkins | Sow outdoors | Jul 5 – Aug 5 |
| Snap beans | Sow outdoors | Jun 21 – Jun 27 |
| Sweet corn | Sow outdoors | Jun 21 – May 25 |
| Watermelon & cantaloupe | Sow outdoors | Jul 5 – Aug 5 |
| Okra | Sow outdoors | Jun 28 – Jul 21 |
| Peas | Sow outdoors (spring) | May 5 – Jun 20 |
| Potatoes | Plant outdoors (spring) | May 5 – Jul 5 |
| Onions | Start seeds indoors (spring) | Mar 24 – Apr 20 |
| Onions | Transplant outdoors (spring) | May 22 – Jun 20 |
| Broccoli | Start seeds indoors (spring) | Apr 17 – May 21 |
| Broccoli | Transplant outdoors (spring) | May 22 – Jun 20 |
| Broccoli | Start seeds indoors (fall) | May 15 – May 25 |
| Broccoli | Transplant outdoors (fall) | Jun 14 – Jun 25 |
| Cabbage | Start seeds indoors (spring) | Apr 7 – May 5 |
| Cabbage | Transplant outdoors (spring) | May 5 – Jun 5 |
| Cabbage | Start seeds indoors (fall) | May 5 – Jun 4 |
| Cabbage | Transplant outdoors (fall) | Jun 4 – Jul 5 |
| Leaf lettuce | Sow outdoors (spring) | May 5 – Jul 21 |
| Leaf lettuce | Sow outdoors (fall) | Jun 4 – Jul 21 |
| Spinach | Sow outdoors (spring) | Apr 28 – Jun 11 |
| Spinach | Sow outdoors (fall) | Jun 21 – Jul 26 |
| Radishes | Sow outdoors (spring) | May 5 – Jun 25 |
| Radishes | Sow outdoors (fall) | Jun 4 – Aug 5 |
| Kale | Sow outdoors (spring) | May 22 – Jun 11 |
| Kale | Sow outdoors (fall) | May 28 – Jul 5 |
| Carrots | Sow outdoors (spring) | Jun 5 – Jul 21 |
| Carrots | Sow outdoors (fall) | May 5 – Jun 20 |
| Garlic | Plant outdoors (fall) | Sep 4 – Oct 5 |
Where these dates come from
ZIP code 82336 is matched to the NOAA station Wamsutter, WY, 14.5 km away, at 6,740 ft elevation (51 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Wamsutter, WY (used) | 6,740 ft | Jun 5 | Sep 14 |
| Bitter Creek 4 Ne, WY | 6,722 ft | Jun 1 | Sep 16 |
| Rock Springs Ap, WY | 6,741 ft | May 22 | Sep 28 |
| Rawlins 1N, WY | 6,908 ft | May 17 | Oct 2 |
Frost dates near Wamsutter
- Point Of Rocks, WY 82942 · last May 22, first Sep 28
- Superior, WY 82945 · last May 22, first Sep 28
- Rawlins, WY 82301 · last Jun 1, first Sep 15
- Bairoil, WY 82322 · last May 21, first Sep 27
- Baggs, WY 82321 · last Jun 1, first Sep 18
- Reliance, WY 82943 · last May 22, first Sep 28
- Sinclair, WY 82334 · last Jun 1, first Sep 15
- Dixon, WY 82323 · last Jun 1, first Sep 18
Frequently asked questions
- When is the last frost in Wamsutter, WY?
- For ZIP code 82336, the average last spring frost (32°F) is June 5, based on NOAA 1991-2020 climate normals for the Wamsutter, WY weather station. There is a 1-in-10 chance of a frost after June 23.
- When is the first frost in Wamsutter, WY?
- The average first fall frost (32°F) is September 14. There is a 1-in-10 chance of frost by September 1, so tender plants are at risk from that point on.
- How long is the growing season in 82336?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 101 days long.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.