Frost dates for 82514Fort Washakie, WY
The average last spring frost in Fort Washakie is May 18 and the average first fall frost is September 27, giving a typical growing season of about 131 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 18
- Average first fall frost
- Sep 27
- Growing season
- 131 days
Safer after Jun 3 (1-in-10 risk)
Possible by Sep 13 (1-in-10 risk)
Last frost typically in 203 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) | May 18 · Jun 1 · Jun 16 | Sep 7 · Sep 19 · Sep 29 | 107 days | 100% |
| Frost / freeze (32°F) | May 4 · May 18 · Jun 3 | Sep 13 · Sep 27 · Oct 10 | 131 days | 100% |
| Hard freeze (28°F) | Apr 22 · May 4 · May 20 | Sep 23 · Oct 6 · Oct 20 | 153 days | 100% |
Planting calendar for Fort Washakie
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 | Apr 17 – Jun 23 |
| Tomatoes | Transplant outdoors | Jun 3 – Jun 7 |
| Peppers | Start seeds indoors | Apr 17 – May 18 |
| Peppers | Transplant outdoors | Jun 17 – Jul 18 |
| Eggplant | Start seeds indoors | May 4 – Jun 2 |
| Eggplant | Transplant outdoors | Jun 17 – Jul 18 |
| Cucumbers | Sow outdoors | Jun 17 – Jun 17 |
| Summer squash | Sow outdoors | Jun 3 – Jul 18 |
| Winter squash & pumpkins | Sow outdoors | Jun 17 – Jul 18 |
| Snap beans | Sow outdoors | Jun 3 – Jul 10 |
| Sweet corn | Sow outdoors | Jun 3 – Jun 7 |
| Watermelon & cantaloupe | Sow outdoors | Jun 17 – Jul 18 |
| Okra | Sow outdoors | Jun 10 – Jul 3 |
| Peas | Sow outdoors (spring) | Apr 17 – Jun 2 |
| Potatoes | Plant outdoors (spring) | Apr 17 – Jun 17 |
| Onions | Start seeds indoors (spring) | Mar 6 – Apr 2 |
| Onions | Transplant outdoors (spring) | May 4 – Jun 2 |
| Broccoli | Start seeds indoors (spring) | Mar 30 – May 3 |
| Broccoli | Transplant outdoors (spring) | May 4 – Jun 2 |
| Broccoli | Start seeds indoors (fall) | May 28 – Jun 7 |
| Broccoli | Transplant outdoors (fall) | Jun 27 – Jul 8 |
| Cabbage | Start seeds indoors (spring) | Mar 20 – Apr 17 |
| Cabbage | Transplant outdoors (spring) | Apr 17 – May 18 |
| Cabbage | Start seeds indoors (fall) | May 18 – Jun 17 |
| Cabbage | Transplant outdoors (fall) | Jun 17 – Jul 18 |
| Leaf lettuce | Sow outdoors (spring) | Apr 17 – Jul 3 |
| Leaf lettuce | Sow outdoors (fall) | Jun 17 – Aug 3 |
| Spinach | Sow outdoors (spring) | Apr 10 – May 24 |
| Spinach | Sow outdoors (fall) | Jul 4 – Aug 8 |
| Radishes | Sow outdoors (spring) | Apr 17 – Jun 7 |
| Radishes | Sow outdoors (fall) | Jun 17 – Aug 18 |
| Kale | Sow outdoors (spring) | May 4 – May 24 |
| Kale | Sow outdoors (fall) | Jun 10 – Jul 18 |
| Carrots | Sow outdoors (spring) | May 18 – Jul 3 |
| Carrots | Sow outdoors (fall) | May 18 – Jul 3 |
| Garlic | Plant outdoors (fall) | Sep 17 – Oct 18 |
Where these dates come from
ZIP code 82514 is matched to the NOAA station Lander Hunt Fld Ap, WY, 25.2 km away, at 5,592 ft elevation (5 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Lander Hunt Fld Ap, WY (used) | 5,592 ft | May 18 | Sep 27 |
| Diversion Dam, WY | 5,578 ft | May 21 | Sep 20 |
| Pavillion, WY | 5,480 ft | May 14 | Sep 30 |
| Riverton, WY | 5,568 ft | May 16 | Sep 28 |
Frost dates near Fort Washakie
- Lander, WY 82520 · last May 12, first Sep 24
- Hudson, WY 82515 · last May 12, first Sep 24
- Kinnear, WY 82516 · last May 21, first Sep 20
- Arapahoe, WY 82510 · last May 12, first Sep 24
- Saint Stephens, WY 82524 · last May 12, first Sep 24
- Pavillion, WY 82523 · last May 14, first Sep 30
- Crowheart, WY 82512 · last Jun 1, first Sep 14
- Riverton, WY 82501 · last May 12, first Sep 24
Frequently asked questions
- When is the last frost in Fort Washakie, WY?
- For ZIP code 82514, the average last spring frost (32°F) is May 18, based on NOAA 1991-2020 climate normals for the Lander Hunt Fld Ap, WY weather station. There is a 1-in-10 chance of a frost after June 3.
- When is the first frost in Fort Washakie, WY?
- The average first fall frost (32°F) is September 27. There is a 1-in-10 chance of frost by September 13, so tender plants are at risk from that point on.
- How long is the growing season in 82514?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 131 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.