Frost dates for 74076Stillwater, OK
The average last spring frost in Stillwater is April 8 and the average first fall frost is October 27, giving a typical growing season of about 201 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 8
- Average first fall frost
- Oct 27
- Growing season
- 201 days
Safer after Apr 25 (1-in-10 risk)
Possible by Oct 13 (1-in-10 risk)
First frost typically in 0 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 5 · Apr 21 · May 4 | Oct 4 · Oct 19 · Oct 31 | 181 days | 100% |
| Frost / freeze (32°F) | Mar 25 · Apr 8 · Apr 25 | Oct 13 · Oct 27 · Nov 10 | 201 days | 100% |
| Hard freeze (28°F) | Mar 9 · Mar 28 · Apr 14 | Oct 21 · Nov 5 · Nov 22 | 223 days | 100% |
Planting calendar for Stillwater
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 8 – May 14 |
| Tomatoes | Transplant outdoors | Apr 24 – Jul 7 |
| Peppers | Start seeds indoors | Mar 8 – Apr 8 |
| Peppers | Transplant outdoors | May 8 – Jun 8 |
| Eggplant | Start seeds indoors | Mar 25 – Apr 23 |
| Eggplant | Transplant outdoors | May 8 – Jun 8 |
| Cucumbers | Sow outdoors | May 8 – Jul 17 |
| Summer squash | Sow outdoors | Apr 24 – Jun 8 |
| Winter squash & pumpkins | Sow outdoors | May 8 – Jun 8 |
| Snap beans | Sow outdoors | Apr 24 – Aug 9 |
| Sweet corn | Sow outdoors | Apr 24 – Jul 7 |
| Watermelon & cantaloupe | Sow outdoors | May 8 – Jun 8 |
| Okra | Sow outdoors | May 1 – May 24 |
| Peas | Sow outdoors (spring) | Mar 8 – Apr 23 |
| Potatoes | Plant outdoors (spring) | Mar 8 – May 8 |
| Onions | Start seeds indoors (spring) | Jan 25 – Feb 21 |
| Onions | Transplant outdoors (spring) | Mar 25 – Apr 23 |
| Broccoli | Start seeds indoors (spring) | Feb 18 – Mar 24 |
| Broccoli | Transplant outdoors (spring) | Mar 25 – Apr 23 |
| Broccoli | Start seeds indoors (fall) | Jun 27 – Jul 7 |
| Broccoli | Transplant outdoors (fall) | Jul 27 – Aug 7 |
| Cabbage | Start seeds indoors (spring) | Feb 8 – Mar 8 |
| Cabbage | Transplant outdoors (spring) | Mar 8 – Apr 8 |
| Cabbage | Start seeds indoors (fall) | Jun 17 – Jul 17 |
| Cabbage | Transplant outdoors (fall) | Jul 17 – Aug 17 |
| Leaf lettuce | Sow outdoors (spring) | Mar 8 – May 24 |
| Leaf lettuce | Sow outdoors (fall) | Jul 17 – Sep 2 |
| Spinach | Sow outdoors (spring) | Mar 1 – Apr 14 |
| Spinach | Sow outdoors (fall) | Aug 3 – Sep 7 |
| Radishes | Sow outdoors (spring) | Mar 8 – Apr 28 |
| Radishes | Sow outdoors (fall) | Jul 17 – Sep 17 |
| Kale | Sow outdoors (spring) | Mar 25 – Apr 14 |
| Kale | Sow outdoors (fall) | Jul 10 – Aug 17 |
| Carrots | Sow outdoors (spring) | Apr 8 – May 24 |
| Carrots | Sow outdoors (fall) | Jun 17 – Aug 2 |
| Garlic | Plant outdoors (fall) | Oct 17 – Nov 17 |
Where these dates come from
ZIP code 74076 is matched to the NOAA station Stillwater 2 W, OK, 6.2 km away, at 895 ft elevation (73 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Stillwater 2 W, OK (used) | 895 ft | Apr 8 | Oct 27 |
| Stillwater 2 W, OK | 890 ft | Apr 5 | Oct 30 |
| Stillwater Mesonet, OK | 892 ft | Apr 6 | Oct 31 |
| Perkins 2Nnw Mesonet, OK | 958 ft | Apr 4 | Nov 2 |
Frost dates near Stillwater
- Stillwater, OK 74074 · last Apr 5, first Oct 30
- Perkins, OK 74059 · last Apr 8, first Oct 27
- Ripley, OK 74062 · last Apr 1, first Nov 5
- Glencoe, OK 74032 · last Apr 3, first Oct 31
- Langston, OK 73050 · last Apr 3, first Nov 1
- Tryon, OK 74875 · last Apr 7, first Oct 30
- Morrison, OK 73061 · last Apr 3, first Oct 31
- Agra, OK 74824 · last Apr 1, first Nov 5
Frequently asked questions
- When is the last frost in Stillwater, OK?
- For ZIP code 74076, the average last spring frost (32°F) is April 8, based on NOAA 1991-2020 climate normals for the Stillwater 2 W, OK weather station. There is a 1-in-10 chance of a frost after April 25.
- When is the first frost in Stillwater, OK?
- The average first fall frost (32°F) is October 27. There is a 1-in-10 chance of frost by October 13, so tender plants are at risk from that point on.
- How long is the growing season in 74076?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 201 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.