Frost dates for 66018De Soto, KS
The average last spring frost in De Soto is April 13 and the average first fall frost is October 24, giving a typical growing season of about 193 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 13
- Average first fall frost
- Oct 24
- Growing season
- 193 days
Safer after Apr 29 (1-in-10 risk)
Possible by Oct 10 (1-in-10 risk)
Last frost typically in 168 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 9 · Apr 23 · May 6 | Sep 30 · Oct 15 · Oct 27 | 173 days | 100% |
| Frost / freeze (32°F) | Mar 30 · Apr 13 · Apr 29 | Oct 10 · Oct 24 · Nov 4 | 193 days | 100% |
| Hard freeze (28°F) | Mar 16 · Apr 3 · Apr 19 | Oct 20 · Nov 2 · Nov 18 | 214 days | 100% |
Planting calendar for De Soto
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 13 – May 19 |
| Tomatoes | Transplant outdoors | Apr 29 – Jul 4 |
| Peppers | Start seeds indoors | Mar 13 – Apr 13 |
| Peppers | Transplant outdoors | May 13 – Jun 13 |
| Eggplant | Start seeds indoors | Mar 30 – Apr 28 |
| Eggplant | Transplant outdoors | May 13 – Jun 13 |
| Cucumbers | Sow outdoors | May 13 – Jul 14 |
| Summer squash | Sow outdoors | Apr 29 – Jun 13 |
| Winter squash & pumpkins | Sow outdoors | May 13 – Jun 13 |
| Snap beans | Sow outdoors | Apr 29 – Aug 6 |
| Sweet corn | Sow outdoors | Apr 29 – Jul 4 |
| Watermelon & cantaloupe | Sow outdoors | May 13 – Jun 13 |
| Okra | Sow outdoors | May 6 – May 29 |
| Peas | Sow outdoors (spring) | Mar 13 – Apr 28 |
| Potatoes | Plant outdoors (spring) | Mar 13 – May 13 |
| Onions | Start seeds indoors (spring) | Jan 30 – Feb 26 |
| Onions | Transplant outdoors (spring) | Mar 30 – Apr 28 |
| Broccoli | Start seeds indoors (spring) | Feb 23 – Mar 29 |
| Broccoli | Transplant outdoors (spring) | Mar 30 – Apr 28 |
| Broccoli | Start seeds indoors (fall) | Jun 24 – Jul 4 |
| Broccoli | Transplant outdoors (fall) | Jul 24 – Aug 4 |
| Cabbage | Start seeds indoors (spring) | Feb 13 – Mar 13 |
| Cabbage | Transplant outdoors (spring) | Mar 13 – Apr 13 |
| Cabbage | Start seeds indoors (fall) | Jun 14 – Jul 14 |
| Cabbage | Transplant outdoors (fall) | Jul 14 – Aug 14 |
| Leaf lettuce | Sow outdoors (spring) | Mar 13 – May 29 |
| Leaf lettuce | Sow outdoors (fall) | Jul 14 – Aug 30 |
| Spinach | Sow outdoors (spring) | Mar 6 – Apr 19 |
| Spinach | Sow outdoors (fall) | Jul 31 – Sep 4 |
| Radishes | Sow outdoors (spring) | Mar 13 – May 3 |
| Radishes | Sow outdoors (fall) | Jul 14 – Sep 14 |
| Kale | Sow outdoors (spring) | Mar 30 – Apr 19 |
| Kale | Sow outdoors (fall) | Jul 7 – Aug 14 |
| Carrots | Sow outdoors (spring) | Apr 13 – May 29 |
| Carrots | Sow outdoors (fall) | Jun 14 – Jul 30 |
| Garlic | Plant outdoors (fall) | Oct 14 – Nov 14 |
Where these dates come from
ZIP code 66018 is matched to the NOAA station Olathe Johnson Co Ap, KS, 14.6 km away, at 1,087 ft elevation (195 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Olathe Johnson Co Ap, KS (used) | 1,087 ft | Apr 13 | Oct 24 |
| Bonner Springs, KS | 850 ft | Apr 16 | Oct 22 |
| Olathe 3E, KS | 1,055 ft | Apr 10 | Oct 29 |
| Lawrence Muni Ap, KS | 832 ft | Apr 21 | Oct 17 |
Frost dates near De Soto
- Linwood, KS 66052 · last Apr 21, first Oct 17
- Eudora, KS 66025 · last Apr 21, first Oct 17
- Olathe, KS 66051 · last Apr 10, first Oct 29
- Overland Park, KS 66225 · last Apr 10, first Oct 29
- Shawnee Mission, KS 66276 · last Apr 10, first Oct 29
- Bonner Springs, KS 66012 · last Apr 16, first Oct 22
- New Century, KS 66031 · last Apr 13, first Oct 24
- Gardner, KS 66030 · last Apr 13, first Oct 24
Frequently asked questions
- When is the last frost in De Soto, KS?
- For ZIP code 66018, the average last spring frost (32°F) is April 13, based on NOAA 1991-2020 climate normals for the Olathe Johnson Co Ap, KS weather station. There is a 1-in-10 chance of a frost after April 29.
- When is the first frost in De Soto, KS?
- The average first fall frost (32°F) is October 24. There is a 1-in-10 chance of frost by October 10, so tender plants are at risk from that point on.
- How long is the growing season in 66018?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 193 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.