Frost dates for 73838Chester, OK
The average last spring frost in Chester is April 19 and the average first fall frost is October 26, giving a typical growing season of about 188 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 19
- Average first fall frost
- Oct 26
- Growing season
- 188 days
Safer after May 3 (1-in-10 risk)
Possible by Oct 11 (1-in-10 risk)
First frost typically in 1 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 13 · Apr 28 · May 10 | Oct 2 · Oct 16 · Oct 30 | 171 days | 100% |
| Frost / freeze (32°F) | Apr 1 · Apr 19 · May 3 | Oct 11 · Oct 26 · Nov 8 | 188 days | 100% |
| Hard freeze (28°F) | Mar 19 · Apr 7 · Apr 23 | Oct 19 · Nov 2 · Nov 16 | 209 days | 100% |
Planting calendar for Chester
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 19 – May 25 |
| Tomatoes | Transplant outdoors | May 5 – Jul 6 |
| Peppers | Start seeds indoors | Mar 19 – Apr 19 |
| Peppers | Transplant outdoors | May 19 – Jun 19 |
| Eggplant | Start seeds indoors | Apr 5 – May 4 |
| Eggplant | Transplant outdoors | May 19 – Jun 19 |
| Cucumbers | Sow outdoors | May 19 – Jul 16 |
| Summer squash | Sow outdoors | May 5 – Jun 19 |
| Winter squash & pumpkins | Sow outdoors | May 19 – Jun 19 |
| Snap beans | Sow outdoors | May 5 – Aug 8 |
| Sweet corn | Sow outdoors | May 5 – Jul 6 |
| Watermelon & cantaloupe | Sow outdoors | May 19 – Jun 19 |
| Okra | Sow outdoors | May 12 – Jun 4 |
| Peas | Sow outdoors (spring) | Mar 19 – May 4 |
| Potatoes | Plant outdoors (spring) | Mar 19 – May 19 |
| Onions | Start seeds indoors (spring) | Feb 5 – Mar 4 |
| Onions | Transplant outdoors (spring) | Apr 5 – May 4 |
| Broccoli | Start seeds indoors (spring) | Mar 1 – Apr 4 |
| Broccoli | Transplant outdoors (spring) | Apr 5 – May 4 |
| Broccoli | Start seeds indoors (fall) | Jun 26 – Jul 6 |
| Broccoli | Transplant outdoors (fall) | Jul 26 – Aug 6 |
| Cabbage | Start seeds indoors (spring) | Feb 19 – Mar 19 |
| Cabbage | Transplant outdoors (spring) | Mar 19 – Apr 19 |
| Cabbage | Start seeds indoors (fall) | Jun 16 – Jul 16 |
| Cabbage | Transplant outdoors (fall) | Jul 16 – Aug 16 |
| Leaf lettuce | Sow outdoors (spring) | Mar 19 – Jun 4 |
| Leaf lettuce | Sow outdoors (fall) | Jul 16 – Sep 1 |
| Spinach | Sow outdoors (spring) | Mar 12 – Apr 25 |
| Spinach | Sow outdoors (fall) | Aug 2 – Sep 6 |
| Radishes | Sow outdoors (spring) | Mar 19 – May 9 |
| Radishes | Sow outdoors (fall) | Jul 16 – Sep 16 |
| Kale | Sow outdoors (spring) | Apr 5 – Apr 25 |
| Kale | Sow outdoors (fall) | Jul 9 – Aug 16 |
| Carrots | Sow outdoors (spring) | Apr 19 – Jun 4 |
| Carrots | Sow outdoors (fall) | Jun 16 – Aug 1 |
| Garlic | Plant outdoors (fall) | Oct 16 – Nov 16 |
Where these dates come from
ZIP code 73838 is matched to the NOAA station Mutual, OK, 25.9 km away, at 1,890 ft elevation (30 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Mutual, OK (used) | 1,890 ft | Apr 19 | Oct 26 |
| Seiling 7Wnw Mesonet, OK | 1,788 ft | Apr 11 | Oct 25 |
| Taloga, OK | 1,715 ft | Apr 18 | Oct 21 |
| Fairview 1W Mesonet, OK | 1,328 ft | Apr 5 | Nov 1 |
Frost dates near Chester
- Seiling, OK 73663 · last Apr 18, first Oct 21
- Mutual, OK 73853 · last Apr 19, first Oct 26
- Fairview, OK 73737 · last Apr 5, first Nov 1
- Taloga, OK 73667 · last Apr 18, first Oct 21
- Mooreland, OK 73852 · last Apr 19, first Oct 26
- Longdale, OK 73755 · last Apr 14, first Oct 27
- Southard, OK 73770 · last Apr 14, first Oct 27
- Waynoka, OK 73860 · last Apr 12, first Oct 24
Frequently asked questions
- When is the last frost in Chester, OK?
- For ZIP code 73838, the average last spring frost (32°F) is April 19, based on NOAA 1991-2020 climate normals for the Mutual, OK weather station. There is a 1-in-10 chance of a frost after May 3.
- When is the first frost in Chester, OK?
- The average first fall frost (32°F) is October 26. There is a 1-in-10 chance of frost by October 11, so tender plants are at risk from that point on.
- How long is the growing season in 73838?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 188 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.