Frost dates for 82242Van Tassell, WY
The average last spring frost in Van Tassell is May 20 and the average first fall frost is September 21, giving a typical growing season of about 121 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 20
- Average first fall frost
- Sep 21
- Growing season
- 121 days
Safer after Jun 5 (1-in-10 risk)
Possible by Sep 4 (1-in-10 risk)
Last frost typically in 199 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 17 · May 31 · Jun 16 | Aug 27 · Sep 12 · Sep 25 | 101 days | 100% |
| Frost / freeze (32°F) | May 8 · May 20 · Jun 5 | Sep 4 · Sep 21 · Oct 5 | 121 days | 100% |
| Hard freeze (28°F) | Apr 29 · May 9 · May 23 | Sep 15 · Oct 1 · Oct 15 | 142 days | 100% |
Planting calendar for Van Tassell
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 19 – Jun 25 |
| Tomatoes | Transplant outdoors | Jun 5 – Jun 1 |
| Peppers | Start seeds indoors | Apr 19 – May 20 |
| Peppers | Transplant outdoors | Jun 19 – Jul 20 |
| Eggplant | Start seeds indoors | May 6 – Jun 4 |
| Eggplant | Transplant outdoors | Jun 19 – Jul 20 |
| Cucumbers | Sow outdoors | Jun 19 – Jun 11 |
| Summer squash | Sow outdoors | Jun 5 – Jul 20 |
| Winter squash & pumpkins | Sow outdoors | Jun 19 – Jul 20 |
| Snap beans | Sow outdoors | Jun 5 – Jul 4 |
| Sweet corn | Sow outdoors | Jun 5 – Jun 1 |
| Watermelon & cantaloupe | Sow outdoors | Jun 19 – Jul 20 |
| Okra | Sow outdoors | Jun 12 – Jul 5 |
| Peas | Sow outdoors (spring) | Apr 19 – Jun 4 |
| Potatoes | Plant outdoors (spring) | Apr 19 – Jun 19 |
| Onions | Start seeds indoors (spring) | Mar 8 – Apr 4 |
| Onions | Transplant outdoors (spring) | May 6 – Jun 4 |
| Broccoli | Start seeds indoors (spring) | Apr 1 – May 5 |
| Broccoli | Transplant outdoors (spring) | May 6 – Jun 4 |
| Broccoli | Start seeds indoors (fall) | May 22 – Jun 1 |
| Broccoli | Transplant outdoors (fall) | Jun 21 – Jul 2 |
| Cabbage | Start seeds indoors (spring) | Mar 22 – Apr 19 |
| Cabbage | Transplant outdoors (spring) | Apr 19 – May 20 |
| Cabbage | Start seeds indoors (fall) | May 12 – Jun 11 |
| Cabbage | Transplant outdoors (fall) | Jun 11 – Jul 12 |
| Leaf lettuce | Sow outdoors (spring) | Apr 19 – Jul 5 |
| Leaf lettuce | Sow outdoors (fall) | Jun 11 – Jul 28 |
| Spinach | Sow outdoors (spring) | Apr 12 – May 26 |
| Spinach | Sow outdoors (fall) | Jun 28 – Aug 2 |
| Radishes | Sow outdoors (spring) | Apr 19 – Jun 9 |
| Radishes | Sow outdoors (fall) | Jun 11 – Aug 12 |
| Kale | Sow outdoors (spring) | May 6 – May 26 |
| Kale | Sow outdoors (fall) | Jun 4 – Jul 12 |
| Carrots | Sow outdoors (spring) | May 20 – Jul 5 |
| Carrots | Sow outdoors (fall) | May 12 – Jun 27 |
| Garlic | Plant outdoors (fall) | Sep 11 – Oct 12 |
Where these dates come from
ZIP code 82242 is matched to the NOAA station Harrison, NE, 21.1 km away, at 4,850 ft elevation (71 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Harrison, NE (used) | 4,850 ft | May 20 | Sep 21 |
| Harrison 4Nw, NE | 5,073 ft | May 17 | Sep 28 |
| Torrington 29N, WY | 4,860 ft | May 17 | Sep 28 |
| Lusk 25Ne, WY | 4,136 ft | May 14 | Oct 1 |
Frost dates near Van Tassell
- Harrison, NE 69346 · last May 20, first Sep 21
- Lusk, WY 82225 · last May 23, first Sep 20
- Jay Em, WY 82219 · last May 17, first Sep 28
- Manville, WY 82227 · last May 23, first Sep 20
- Lance Creek, WY 82222 · last May 17, first Sep 25
- Crawford, NE 69339 · last May 13, first Sep 30
- Fort Laramie, WY 82212 · last May 14, first Sep 26
- Hartville, WY 82215 · last May 7, first Oct 6
Frequently asked questions
- When is the last frost in Van Tassell, WY?
- For ZIP code 82242, the average last spring frost (32°F) is May 20, based on NOAA 1991-2020 climate normals for the Harrison, NE weather station. There is a 1-in-10 chance of a frost after June 5.
- When is the first frost in Van Tassell, WY?
- The average first fall frost (32°F) is September 21. There is a 1-in-10 chance of frost by September 4, so tender plants are at risk from that point on.
- How long is the growing season in 82242?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 121 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.