Frost dates for 59001Absarokee, MT
The average last spring frost in Absarokee is June 1 and the average first fall frost is September 11, giving a typical growing season of about 100 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Jun 1
- Average first fall frost
- Sep 11
- Growing season
- 100 days
Safer after Jun 21 (1-in-10 risk)
Possible by Aug 25 (1-in-10 risk)
Last frost typically in 210 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) | — | — | 66 days | 100% |
| Frost / freeze (32°F) | May 15 · Jun 1 · Jun 21 | Aug 25 · Sep 11 · Sep 26 | 100 days | 100% |
| Hard freeze (28°F) | May 2 · May 15 · Jun 1 | Sep 7 · Sep 25 · Oct 11 | 130 days | 100% |
Planting calendar for Absarokee
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 1 – Jul 7 |
| Tomatoes | Transplant outdoors | Jun 17 – May 22 |
| Peppers | Start seeds indoors | May 1 – Jun 1 |
| Peppers | Transplant outdoors | Jul 1 – Aug 1 |
| Eggplant | Start seeds indoors | May 18 – Jun 16 |
| Eggplant | Transplant outdoors | Jul 1 – Aug 1 |
| Cucumbers | Sow outdoors | Jul 1 – Jun 1 |
| Summer squash | Sow outdoors | Jun 17 – Aug 1 |
| Winter squash & pumpkins | Sow outdoors | Jul 1 – Aug 1 |
| Snap beans | Sow outdoors | Jun 17 – Jun 24 |
| Sweet corn | Sow outdoors | Jun 17 – May 22 |
| Watermelon & cantaloupe | Sow outdoors | Jul 1 – Aug 1 |
| Okra | Sow outdoors | Jun 24 – Jul 17 |
| Peas | Sow outdoors (spring) | May 1 – Jun 16 |
| Potatoes | Plant outdoors (spring) | May 1 – Jul 1 |
| Onions | Start seeds indoors (spring) | Mar 20 – Apr 16 |
| Onions | Transplant outdoors (spring) | May 18 – Jun 16 |
| Broccoli | Start seeds indoors (spring) | Apr 13 – May 17 |
| Broccoli | Transplant outdoors (spring) | May 18 – Jun 16 |
| Broccoli | Start seeds indoors (fall) | May 12 – May 22 |
| Broccoli | Transplant outdoors (fall) | Jun 11 – Jun 22 |
| Cabbage | Start seeds indoors (spring) | Apr 3 – May 1 |
| Cabbage | Transplant outdoors (spring) | May 1 – Jun 1 |
| Cabbage | Start seeds indoors (fall) | May 2 – Jun 1 |
| Cabbage | Transplant outdoors (fall) | Jun 1 – Jul 2 |
| Leaf lettuce | Sow outdoors (spring) | May 1 – Jul 17 |
| Leaf lettuce | Sow outdoors (fall) | Jun 1 – Jul 18 |
| Spinach | Sow outdoors (spring) | Apr 24 – Jun 7 |
| Spinach | Sow outdoors (fall) | Jun 18 – Jul 23 |
| Radishes | Sow outdoors (spring) | May 1 – Jun 21 |
| Radishes | Sow outdoors (fall) | Jun 1 – Aug 2 |
| Kale | Sow outdoors (spring) | May 18 – Jun 7 |
| Kale | Sow outdoors (fall) | May 25 – Jul 2 |
| Carrots | Sow outdoors (spring) | Jun 1 – Jul 17 |
| Carrots | Sow outdoors (fall) | May 2 – Jun 17 |
| Garlic | Plant outdoors (fall) | Sep 1 – Oct 2 |
Where these dates come from
ZIP code 59001 is matched to the NOAA station Nye #2, MT, 27.9 km away, at 4,840 ft elevation (404 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Nye #2, MT (used) | 4,840 ft | Jun 1 | Sep 11 |
| Columbus, MT | 3,602 ft | May 27 | Sep 14 |
| Joliet, MT | 3,838 ft | May 29 | Sep 15 |
| Mystic Lake, MT | 6,544 ft | Jun 5 | Sep 14 |
Frost dates near Absarokee
- Fishtail, MT 59028 · last Jun 3, first Sep 19
- Columbus, MT 59019 · last May 27, first Sep 14
- Reed Point, MT 59069 · last May 24, first Sep 21
- Roberts, MT 59070 · last May 29, first Sep 15
- Roscoe, MT 59071 · last Jun 3, first Sep 19
- Nye, MT 59061 · last Jun 1, first Sep 11
- Boyd, MT 59013 · last May 29, first Sep 15
- Greycliff, MT 59033 · last May 14, first Sep 26
Frequently asked questions
- When is the last frost in Absarokee, MT?
- For ZIP code 59001, the average last spring frost (32°F) is June 1, based on NOAA 1991-2020 climate normals for the Nye #2, MT weather station. There is a 1-in-10 chance of a frost after June 21.
- When is the first frost in Absarokee, MT?
- The average first fall frost (32°F) is September 11. There is a 1-in-10 chance of frost by August 25, so tender plants are at risk from that point on.
- How long is the growing season in 59001?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 100 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.