Frost dates for 74020Cleveland, OK
The average last spring frost in Cleveland is April 6 and the average first fall frost is October 29, giving a typical growing season of about 207 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 6
- Average first fall frost
- Oct 29
- Growing season
- 207 days
Safer after Apr 23 (1-in-10 risk)
Possible by Oct 14 (1-in-10 risk)
Last frost typically in 154 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) | Apr 2 · Apr 18 · May 4 | Oct 2 · Oct 20 · Nov 3 | 182 days | 100% |
| Frost / freeze (32°F) | Mar 19 · Apr 6 · Apr 23 | Oct 14 · Oct 29 · Nov 13 | 207 days | 100% |
| Hard freeze (28°F) | Mar 3 · Mar 24 · Apr 11 | Oct 23 · Nov 7 · Nov 25 | 229 days | 100% |
Planting calendar for Cleveland
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 6 – May 12 |
| Tomatoes | Transplant outdoors | Apr 22 – Jul 9 |
| Peppers | Start seeds indoors | Mar 6 – Apr 6 |
| Peppers | Transplant outdoors | May 6 – Jun 6 |
| Eggplant | Start seeds indoors | Mar 23 – Apr 21 |
| Eggplant | Transplant outdoors | May 6 – Jun 6 |
| Cucumbers | Sow outdoors | May 6 – Jul 19 |
| Summer squash | Sow outdoors | Apr 22 – Jun 6 |
| Winter squash & pumpkins | Sow outdoors | May 6 – Jun 6 |
| Snap beans | Sow outdoors | Apr 22 – Aug 11 |
| Sweet corn | Sow outdoors | Apr 22 – Jul 9 |
| Watermelon & cantaloupe | Sow outdoors | May 6 – Jun 6 |
| Okra | Sow outdoors | Apr 29 – May 22 |
| Peas | Sow outdoors (spring) | Mar 6 – Apr 21 |
| Potatoes | Plant outdoors (spring) | Mar 6 – May 6 |
| Onions | Start seeds indoors (spring) | Jan 23 – Feb 19 |
| Onions | Transplant outdoors (spring) | Mar 23 – Apr 21 |
| Broccoli | Start seeds indoors (spring) | Feb 16 – Mar 22 |
| Broccoli | Transplant outdoors (spring) | Mar 23 – Apr 21 |
| Broccoli | Start seeds indoors (fall) | Jun 29 – Jul 9 |
| Broccoli | Transplant outdoors (fall) | Jul 29 – Aug 9 |
| Cabbage | Start seeds indoors (spring) | Feb 6 – Mar 6 |
| Cabbage | Transplant outdoors (spring) | Mar 6 – Apr 6 |
| Cabbage | Start seeds indoors (fall) | Jun 19 – Jul 19 |
| Cabbage | Transplant outdoors (fall) | Jul 19 – Aug 19 |
| Leaf lettuce | Sow outdoors (spring) | Mar 6 – May 22 |
| Leaf lettuce | Sow outdoors (fall) | Jul 19 – Sep 4 |
| Spinach | Sow outdoors (spring) | Feb 27 – Apr 12 |
| Spinach | Sow outdoors (fall) | Aug 5 – Sep 9 |
| Radishes | Sow outdoors (spring) | Mar 6 – Apr 26 |
| Radishes | Sow outdoors (fall) | Jul 19 – Sep 19 |
| Kale | Sow outdoors (spring) | Mar 23 – Apr 12 |
| Kale | Sow outdoors (fall) | Jul 12 – Aug 19 |
| Carrots | Sow outdoors (spring) | Apr 6 – May 22 |
| Carrots | Sow outdoors (fall) | Jun 19 – Aug 4 |
| Garlic | Plant outdoors (fall) | Oct 19 – Nov 19 |
Where these dates come from
ZIP code 74020 is matched to the NOAA station Mannford 6 Nw, OK, 9.1 km away, at 830 ft elevation (98 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Mannford 6 Nw, OK (used) | 830 ft | Apr 6 | Oct 29 |
| Ralston, OK | 825 ft | Apr 11 | Oct 24 |
| Barnsdall, OK | 770 ft | Mar 31 | Oct 31 |
| Cushing, OK | 950 ft | Apr 1 | Nov 5 |
Frost dates near Cleveland
- Osage, OK 74054 · last Apr 6, first Oct 29
- Terlton, OK 74081 · last Apr 6, first Oct 29
- Hallett, OK 74034 · last Apr 6, first Oct 29
- Prue, OK 74060 · last Apr 6, first Oct 29
- Jennings, OK 74038 · last Apr 6, first Oct 29
- Hominy, OK 74035 · last Apr 6, first Oct 29
- Mannford, OK 74044 · last Apr 6, first Oct 29
- Maramec, OK 74045 · last Apr 6, first Oct 29
Frequently asked questions
- When is the last frost in Cleveland, OK?
- For ZIP code 74020, the average last spring frost (32°F) is April 6, based on NOAA 1991-2020 climate normals for the Mannford 6 Nw, OK weather station. There is a 1-in-10 chance of a frost after April 23.
- When is the first frost in Cleveland, OK?
- The average first fall frost (32°F) is October 29. There is a 1-in-10 chance of frost by October 14, so tender plants are at risk from that point on.
- How long is the growing season in 74020?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 207 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.