Frost dates for 82936Lonetree, WY
The average last spring frost in Lonetree is May 25 and the average first fall frost is September 27, giving a typical growing season of about 124 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 25
- Average first fall frost
- Sep 27
- Growing season
- 124 days
Safer after Jun 11 (1-in-10 risk)
Possible by Sep 14 (1-in-10 risk)
Last frost typically in 205 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 23 · Jun 8 · Jun 21 | Sep 6 · Sep 19 · Sep 29 | 103 days | 100% |
| Frost / freeze (32°F) | May 8 · May 25 · Jun 11 | Sep 14 · Sep 27 · Oct 11 | 124 days | 100% |
| Hard freeze (28°F) | Apr 25 · May 8 · May 29 | Sep 22 · Oct 5 · Oct 20 | 148 days | 100% |
Planting calendar for Lonetree
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 24 – Jun 30 |
| Tomatoes | Transplant outdoors | Jun 10 – Jun 7 |
| Peppers | Start seeds indoors | Apr 24 – May 25 |
| Peppers | Transplant outdoors | Jun 24 – Jul 25 |
| Eggplant | Start seeds indoors | May 11 – Jun 9 |
| Eggplant | Transplant outdoors | Jun 24 – Jul 25 |
| Cucumbers | Sow outdoors | Jun 24 – Jun 17 |
| Summer squash | Sow outdoors | Jun 10 – Jul 25 |
| Winter squash & pumpkins | Sow outdoors | Jun 24 – Jul 25 |
| Snap beans | Sow outdoors | Jun 10 – Jul 10 |
| Sweet corn | Sow outdoors | Jun 10 – Jun 7 |
| Watermelon & cantaloupe | Sow outdoors | Jun 24 – Jul 25 |
| Okra | Sow outdoors | Jun 17 – Jul 10 |
| Peas | Sow outdoors (spring) | Apr 24 – Jun 9 |
| Potatoes | Plant outdoors (spring) | Apr 24 – Jun 24 |
| Onions | Start seeds indoors (spring) | Mar 13 – Apr 9 |
| Onions | Transplant outdoors (spring) | May 11 – Jun 9 |
| Broccoli | Start seeds indoors (spring) | Apr 6 – May 10 |
| Broccoli | Transplant outdoors (spring) | May 11 – Jun 9 |
| Broccoli | Start seeds indoors (fall) | May 28 – Jun 7 |
| Broccoli | Transplant outdoors (fall) | Jun 27 – Jul 8 |
| Cabbage | Start seeds indoors (spring) | Mar 27 – Apr 24 |
| Cabbage | Transplant outdoors (spring) | Apr 24 – May 25 |
| Cabbage | Start seeds indoors (fall) | May 18 – Jun 17 |
| Cabbage | Transplant outdoors (fall) | Jun 17 – Jul 18 |
| Leaf lettuce | Sow outdoors (spring) | Apr 24 – Jul 10 |
| Leaf lettuce | Sow outdoors (fall) | Jun 17 – Aug 3 |
| Spinach | Sow outdoors (spring) | Apr 17 – May 31 |
| Spinach | Sow outdoors (fall) | Jul 4 – Aug 8 |
| Radishes | Sow outdoors (spring) | Apr 24 – Jun 14 |
| Radishes | Sow outdoors (fall) | Jun 17 – Aug 18 |
| Kale | Sow outdoors (spring) | May 11 – May 31 |
| Kale | Sow outdoors (fall) | Jun 10 – Jul 18 |
| Carrots | Sow outdoors (spring) | May 25 – Jul 10 |
| Carrots | Sow outdoors (fall) | May 18 – Jul 3 |
| Garlic | Plant outdoors (fall) | Sep 17 – Oct 18 |
Where these dates come from
ZIP code 82936 is matched to the NOAA station Church Buttes Gas Plt, WY, 38.5 km away, at 7,079 ft elevation (490 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Church Buttes Gas Plt, WY (used) | 7,079 ft | May 25 | Sep 27 |
| Mtn View, WY | 6,800 ft | Jun 14 | Sep 9 |
| Manila, UT | 6,393 ft | May 22 | Sep 29 |
| Buckboard Marina, WY | 6,080 ft | May 24 | Sep 23 |
Frost dates near Lonetree
- Mc Kinnon, WY 82938 · last May 22, first Sep 29
- Mountain View, WY 82939 · last Jun 14, first Sep 9
- Robertson, WY 82944 · last Jun 11, first Sep 18
- Lyman, WY 82937 · last Jun 14, first Sep 9
- Fort Bridger, WY 82933 · last Jun 14, first Sep 9
- Manila, UT 84046 · last May 22, first Sep 29
- Little America, WY 82929 · last May 24, first Sep 22
- Granger, WY 82934 · last May 24, first Sep 22
Frequently asked questions
- When is the last frost in Lonetree, WY?
- For ZIP code 82936, the average last spring frost (32°F) is May 25, based on NOAA 1991-2020 climate normals for the Church Buttes Gas Plt, WY weather station. There is a 1-in-10 chance of a frost after June 11.
- When is the first frost in Lonetree, WY?
- The average first fall frost (32°F) is September 27. There is a 1-in-10 chance of frost by September 14, so tender plants are at risk from that point on.
- How long is the growing season in 82936?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 124 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.