Frost dates for 82414Cody, WY
The average last spring frost in Cody is May 17 and the average first fall frost is October 3, giving a typical growing season of about 136 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 17
- Average first fall frost
- Oct 3
- Growing season
- 136 days
Safer after Jun 3 (1-in-10 risk)
Possible by Sep 18 (1-in-10 risk)
Last frost typically in 195 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 15 · May 30 · Jun 16 | Sep 4 · Sep 23 · Oct 5 | 112 days | 100% |
| Frost / freeze (32°F) | May 1 · May 17 · Jun 3 | Sep 18 · Oct 3 · Oct 17 | 136 days | 100% |
| Hard freeze (28°F) | Apr 19 · May 4 · May 25 | Sep 29 · Oct 12 · Oct 27 | 158 days | 100% |
Planting calendar for Cody
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 16 – Jun 22 |
| Tomatoes | Transplant outdoors | Jun 2 – Jun 13 |
| Peppers | Start seeds indoors | Apr 16 – May 17 |
| Peppers | Transplant outdoors | Jun 16 – Jul 17 |
| Eggplant | Start seeds indoors | May 3 – Jun 1 |
| Eggplant | Transplant outdoors | Jun 16 – Jul 17 |
| Cucumbers | Sow outdoors | Jun 16 – Jun 23 |
| Summer squash | Sow outdoors | Jun 2 – Jul 17 |
| Winter squash & pumpkins | Sow outdoors | Jun 16 – Jul 17 |
| Snap beans | Sow outdoors | Jun 2 – Jul 16 |
| Sweet corn | Sow outdoors | Jun 2 – Jun 13 |
| Watermelon & cantaloupe | Sow outdoors | Jun 16 – Jul 17 |
| Okra | Sow outdoors | Jun 9 – Jul 2 |
| Peas | Sow outdoors (spring) | Apr 16 – Jun 1 |
| Potatoes | Plant outdoors (spring) | Apr 16 – Jun 16 |
| Onions | Start seeds indoors (spring) | Mar 5 – Apr 1 |
| Onions | Transplant outdoors (spring) | May 3 – Jun 1 |
| Broccoli | Start seeds indoors (spring) | Mar 29 – May 2 |
| Broccoli | Transplant outdoors (spring) | May 3 – Jun 1 |
| Broccoli | Start seeds indoors (fall) | Jun 3 – Jun 13 |
| Broccoli | Transplant outdoors (fall) | Jul 3 – Jul 14 |
| Cabbage | Start seeds indoors (spring) | Mar 19 – Apr 16 |
| Cabbage | Transplant outdoors (spring) | Apr 16 – May 17 |
| Cabbage | Start seeds indoors (fall) | May 24 – Jun 23 |
| Cabbage | Transplant outdoors (fall) | Jun 23 – Jul 24 |
| Leaf lettuce | Sow outdoors (spring) | Apr 16 – Jul 2 |
| Leaf lettuce | Sow outdoors (fall) | Jun 23 – Aug 9 |
| Spinach | Sow outdoors (spring) | Apr 9 – May 23 |
| Spinach | Sow outdoors (fall) | Jul 10 – Aug 14 |
| Radishes | Sow outdoors (spring) | Apr 16 – Jun 6 |
| Radishes | Sow outdoors (fall) | Jun 23 – Aug 24 |
| Kale | Sow outdoors (spring) | May 3 – May 23 |
| Kale | Sow outdoors (fall) | Jun 16 – Jul 24 |
| Carrots | Sow outdoors (spring) | May 17 – Jul 2 |
| Carrots | Sow outdoors (fall) | May 24 – Jul 9 |
| Garlic | Plant outdoors (fall) | Sep 23 – Oct 24 |
Where these dates come from
ZIP code 82414 is matched to the NOAA station Buffalo Bill Dam, WY, 7.5 km away, at 5,160 ft elevation (137 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Buffalo Bill Dam, WY (used) | 5,160 ft | May 17 | Oct 3 |
| Cody, WY | 5,280 ft | May 12 | Oct 1 |
| Cody 12Se, WY | 5,248 ft | May 24 | Sep 15 |
| Heart Mtn, WY | 4,790 ft | May 15 | Sep 25 |
Frost dates near Cody
- Ralston, WY 82440 · last May 15, first Sep 25
- Wapiti, WY 82450 · last May 27, first Sep 25
- Powell, WY 82435 · last May 19, first Sep 20
- Meeteetse, WY 82433 · last —, first —
- Byron, WY 82412 · last May 6, first Oct 1
- Burlington, WY 82411 · last May 12, first Sep 28
- Emblem, WY 82422 · last May 12, first Sep 28
- Deaver, WY 82421 · last May 6, first Oct 1
Frequently asked questions
- When is the last frost in Cody, WY?
- For ZIP code 82414, the average last spring frost (32°F) is May 17, based on NOAA 1991-2020 climate normals for the Buffalo Bill Dam, WY weather station. There is a 1-in-10 chance of a frost after June 3.
- When is the first frost in Cody, WY?
- The average first fall frost (32°F) is October 3. There is a 1-in-10 chance of frost by September 18, so tender plants are at risk from that point on.
- How long is the growing season in 82414?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 136 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.