Frost dates for 82324Elk Mountain, WY
The average last spring frost in Elk Mountain is May 28 and the average first fall frost is September 13, giving a typical growing season of about 108 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 28
- Average first fall frost
- Sep 13
- Growing season
- 108 days
Safer after Jun 13 (1-in-10 risk)
Possible by Aug 30 (1-in-10 risk)
Last frost typically in 213 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) | — | — | 79 days | 100% |
| Frost / freeze (32°F) | May 14 · May 28 · Jun 13 | Aug 30 · Sep 13 · Oct 1 | 108 days | 100% |
| Hard freeze (28°F) | May 1 · May 13 · May 29 | Sep 9 · Sep 26 · Oct 12 | 133 days | 100% |
Planting calendar for Elk Mountain
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 27 – Jul 3 |
| Tomatoes | Transplant outdoors | Jun 13 – May 24 |
| Peppers | Start seeds indoors | Apr 27 – May 28 |
| Peppers | Transplant outdoors | Jun 27 – Jul 28 |
| Eggplant | Start seeds indoors | May 14 – Jun 12 |
| Eggplant | Transplant outdoors | Jun 27 – Jul 28 |
| Cucumbers | Sow outdoors | Jun 27 – Jun 3 |
| Summer squash | Sow outdoors | Jun 13 – Jul 28 |
| Winter squash & pumpkins | Sow outdoors | Jun 27 – Jul 28 |
| Snap beans | Sow outdoors | Jun 13 – Jun 26 |
| Sweet corn | Sow outdoors | Jun 13 – May 24 |
| Watermelon & cantaloupe | Sow outdoors | Jun 27 – Jul 28 |
| Okra | Sow outdoors | Jun 20 – Jul 13 |
| Peas | Sow outdoors (spring) | Apr 27 – Jun 12 |
| Potatoes | Plant outdoors (spring) | Apr 27 – Jun 27 |
| Onions | Start seeds indoors (spring) | Mar 16 – Apr 12 |
| Onions | Transplant outdoors (spring) | May 14 – Jun 12 |
| Broccoli | Start seeds indoors (spring) | Apr 9 – May 13 |
| Broccoli | Transplant outdoors (spring) | May 14 – Jun 12 |
| Broccoli | Start seeds indoors (fall) | May 14 – May 24 |
| Broccoli | Transplant outdoors (fall) | Jun 13 – Jun 24 |
| Cabbage | Start seeds indoors (spring) | Mar 30 – Apr 27 |
| Cabbage | Transplant outdoors (spring) | Apr 27 – May 28 |
| Cabbage | Start seeds indoors (fall) | May 4 – Jun 3 |
| Cabbage | Transplant outdoors (fall) | Jun 3 – Jul 4 |
| Leaf lettuce | Sow outdoors (spring) | Apr 27 – Jul 13 |
| Leaf lettuce | Sow outdoors (fall) | Jun 3 – Jul 20 |
| Spinach | Sow outdoors (spring) | Apr 20 – Jun 3 |
| Spinach | Sow outdoors (fall) | Jun 20 – Jul 25 |
| Radishes | Sow outdoors (spring) | Apr 27 – Jun 17 |
| Radishes | Sow outdoors (fall) | Jun 3 – Aug 4 |
| Kale | Sow outdoors (spring) | May 14 – Jun 3 |
| Kale | Sow outdoors (fall) | May 27 – Jul 4 |
| Carrots | Sow outdoors (spring) | May 28 – Jul 13 |
| Carrots | Sow outdoors (fall) | May 4 – Jun 19 |
| Garlic | Plant outdoors (fall) | Sep 3 – Oct 4 |
Where these dates come from
ZIP code 82324 is matched to the NOAA station Elk Mtn, WY, 0.1 km away, at 7,265 ft elevation (1 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Elk Mtn, WY (used) | 7,265 ft | May 28 | Sep 13 |
| Medicine Bow, WY | 6,635 ft | Jun 1 | Sep 8 |
| Saratoga 4N, WY | 6,801 ft | Jun 12 | Sep 7 |
| Saratoga, WY | 6,790 ft | Jun 2 | Sep 12 |
Frost dates near Elk Mountain
- Hanna, WY 82327 · last Jun 1, first Sep 8
- Medicine Bow, WY 82329 · last Jun 1, first Sep 8
- Saratoga, WY 82331 · last Jun 12, first Sep 7
- Walcott, WY 82335 · last Jun 1, first Sep 15
- Rock River, WY 82083 · last Jun 1, first Sep 8
- Shirley Basin, WY 82615 · last Jun 1, first Sep 15
- Centennial, WY 82055 · last Jun 2, first Sep 15
- Laramie, WY 82070 · last Jun 7, first Sep 4
Frequently asked questions
- When is the last frost in Elk Mountain, WY?
- For ZIP code 82324, the average last spring frost (32°F) is May 28, based on NOAA 1991-2020 climate normals for the Elk Mtn, WY weather station. There is a 1-in-10 chance of a frost after June 13.
- When is the first frost in Elk Mountain, WY?
- The average first fall frost (32°F) is September 13. There is a 1-in-10 chance of frost by August 30, so tender plants are at risk from that point on.
- How long is the growing season in 82324?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 108 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.