Frost dates for 73628Cheyenne, OK
The average last spring frost in Cheyenne is April 5 and the average first fall frost is November 2, giving a typical growing season of about 208 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 5
- Average first fall frost
- Nov 2
- Growing season
- 208 days
Safer after Apr 24 (1-in-10 risk)
Possible by Oct 19 (1-in-10 risk)
Last frost typically in 153 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) | Mar 31 · Apr 16 · May 2 | Oct 11 · Oct 25 · Nov 6 | 190 days | 100% |
| Frost / freeze (32°F) | Mar 17 · Apr 5 · Apr 24 | Oct 19 · Nov 2 · Nov 17 | 208 days | 100% |
| Hard freeze (28°F) | Mar 5 · Mar 25 · Apr 13 | Oct 25 · Nov 11 · Nov 28 | 231 days | 100% |
Planting calendar for Cheyenne
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 | Mar 5 – May 11 |
| Tomatoes | Transplant outdoors | Apr 21 – Jul 13 |
| Peppers | Start seeds indoors | Mar 5 – Apr 5 |
| Peppers | Transplant outdoors | May 5 – Jun 5 |
| Eggplant | Start seeds indoors | Mar 22 – Apr 20 |
| Eggplant | Transplant outdoors | May 5 – Jun 5 |
| Cucumbers | Sow outdoors | May 5 – Jul 23 |
| Summer squash | Sow outdoors | Apr 21 – Jun 5 |
| Winter squash & pumpkins | Sow outdoors | May 5 – Jun 5 |
| Snap beans | Sow outdoors | Apr 21 – Aug 15 |
| Sweet corn | Sow outdoors | Apr 21 – Jul 13 |
| Watermelon & cantaloupe | Sow outdoors | May 5 – Jun 5 |
| Okra | Sow outdoors | Apr 28 – May 21 |
| Peas | Sow outdoors (spring) | Mar 5 – Apr 20 |
| Potatoes | Plant outdoors (spring) | Mar 5 – May 5 |
| Onions | Start seeds indoors (spring) | Jan 22 – Feb 18 |
| Onions | Transplant outdoors (spring) | Mar 22 – Apr 20 |
| Broccoli | Start seeds indoors (spring) | Feb 15 – Mar 21 |
| Broccoli | Transplant outdoors (spring) | Mar 22 – Apr 20 |
| Broccoli | Start seeds indoors (fall) | Jul 3 – Jul 13 |
| Broccoli | Transplant outdoors (fall) | Aug 2 – Aug 13 |
| Cabbage | Start seeds indoors (spring) | Feb 5 – Mar 5 |
| Cabbage | Transplant outdoors (spring) | Mar 5 – Apr 5 |
| Cabbage | Start seeds indoors (fall) | Jun 23 – Jul 23 |
| Cabbage | Transplant outdoors (fall) | Jul 23 – Aug 23 |
| Leaf lettuce | Sow outdoors (spring) | Mar 5 – May 21 |
| Leaf lettuce | Sow outdoors (fall) | Jul 23 – Sep 8 |
| Spinach | Sow outdoors (spring) | Feb 26 – Apr 11 |
| Spinach | Sow outdoors (fall) | Aug 9 – Sep 13 |
| Radishes | Sow outdoors (spring) | Mar 5 – Apr 25 |
| Radishes | Sow outdoors (fall) | Jul 23 – Sep 23 |
| Kale | Sow outdoors (spring) | Mar 22 – Apr 11 |
| Kale | Sow outdoors (fall) | Jul 16 – Aug 23 |
| Carrots | Sow outdoors (spring) | Apr 5 – May 21 |
| Carrots | Sow outdoors (fall) | Jun 23 – Aug 8 |
| Garlic | Plant outdoors (fall) | Oct 23 – Nov 23 |
Where these dates come from
ZIP code 73628 is matched to the NOAA station Elk City 4 W, OK, 28.3 km away, at 2,120 ft elevation (142 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Elk City 4 W, OK (used) | 2,120 ft | Apr 5 | Nov 2 |
| Cheyenne 6Sw Mesonet, OK | 2,277 ft | Apr 3 | Nov 3 |
| Hammon 3 Ssw, OK | 1,820 ft | Apr 16 | Oct 23 |
| Butler 5Sw Mesonet, OK | 1,706 ft | Apr 9 | Oct 28 |
Frost dates near Cheyenne
- Reydon, OK 73660 · last Apr 3, first Nov 3
- Hammon, OK 73650 · last Apr 16, first Oct 23
- Sweetwater, OK 73666 · last Apr 3, first Nov 3
- Crawford, OK 73638 · last Apr 9, first Oct 27
- Elk City, OK 73644 · last Apr 5, first Nov 2
- Durham, OK 73642 · last Apr 9, first Oct 27
- Sayre, OK 73662 · last Apr 5, first Nov 2
- Allison, TX 79003 · last Apr 9, first Oct 30
Frequently asked questions
- When is the last frost in Cheyenne, OK?
- For ZIP code 73628, the average last spring frost (32°F) is April 5, based on NOAA 1991-2020 climate normals for the Elk City 4 W, OK weather station. There is a 1-in-10 chance of a frost after April 24.
- When is the first frost in Cheyenne, OK?
- The average first fall frost (32°F) is November 2. There is a 1-in-10 chance of frost by October 19, so tender plants are at risk from that point on.
- How long is the growing season in 73628?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 208 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.