Frost dates for 67733Edson, KS
The average last spring frost in Edson is May 9 and the average first fall frost is October 4, giving a typical growing season of about 145 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 9
- Average first fall frost
- Oct 4
- Growing season
- 145 days
Safer after May 25 (1-in-10 risk)
Possible by Sep 21 (1-in-10 risk)
Last frost typically in 194 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) | May 7 · May 20 · Jun 6 | Sep 12 · Sep 26 · Oct 7 | 126 days | 100% |
| Frost / freeze (32°F) | Apr 28 · May 9 · May 25 | Sep 21 · Oct 4 · Oct 17 | 145 days | 100% |
| Hard freeze (28°F) | Apr 17 · Apr 30 · May 14 | Oct 1 · Oct 15 · Oct 26 | 165 days | 100% |
Planting calendar for Edson
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 | Apr 8 – Jun 14 |
| Tomatoes | Transplant outdoors | May 25 – Jun 14 |
| Peppers | Start seeds indoors | Apr 8 – May 9 |
| Peppers | Transplant outdoors | Jun 8 – Jul 9 |
| Eggplant | Start seeds indoors | Apr 25 – May 24 |
| Eggplant | Transplant outdoors | Jun 8 – Jul 9 |
| Cucumbers | Sow outdoors | Jun 8 – Jun 24 |
| Summer squash | Sow outdoors | May 25 – Jul 9 |
| Winter squash & pumpkins | Sow outdoors | Jun 8 – Jul 9 |
| Snap beans | Sow outdoors | May 25 – Jul 17 |
| Sweet corn | Sow outdoors | May 25 – Jun 14 |
| Watermelon & cantaloupe | Sow outdoors | Jun 8 – Jul 9 |
| Okra | Sow outdoors | Jun 1 – Jun 24 |
| Peas | Sow outdoors (spring) | Apr 8 – May 24 |
| Potatoes | Plant outdoors (spring) | Apr 8 – Jun 8 |
| Onions | Start seeds indoors (spring) | Feb 25 – Mar 24 |
| Onions | Transplant outdoors (spring) | Apr 25 – May 24 |
| Broccoli | Start seeds indoors (spring) | Mar 21 – Apr 24 |
| Broccoli | Transplant outdoors (spring) | Apr 25 – May 24 |
| Broccoli | Start seeds indoors (fall) | Jun 4 – Jun 14 |
| Broccoli | Transplant outdoors (fall) | Jul 4 – Jul 15 |
| Cabbage | Start seeds indoors (spring) | Mar 11 – Apr 8 |
| Cabbage | Transplant outdoors (spring) | Apr 8 – May 9 |
| Cabbage | Start seeds indoors (fall) | May 25 – Jun 24 |
| Cabbage | Transplant outdoors (fall) | Jun 24 – Jul 25 |
| Leaf lettuce | Sow outdoors (spring) | Apr 8 – Jun 24 |
| Leaf lettuce | Sow outdoors (fall) | Jun 24 – Aug 10 |
| Spinach | Sow outdoors (spring) | Apr 1 – May 15 |
| Spinach | Sow outdoors (fall) | Jul 11 – Aug 15 |
| Radishes | Sow outdoors (spring) | Apr 8 – May 29 |
| Radishes | Sow outdoors (fall) | Jun 24 – Aug 25 |
| Kale | Sow outdoors (spring) | Apr 25 – May 15 |
| Kale | Sow outdoors (fall) | Jun 17 – Jul 25 |
| Carrots | Sow outdoors (spring) | May 9 – Jun 24 |
| Carrots | Sow outdoors (fall) | May 25 – Jul 10 |
| Garlic | Plant outdoors (fall) | Sep 24 – Oct 25 |
Where these dates come from
ZIP code 67733 is matched to the NOAA station Brewster 4W, KS, 6.5 km away, at 3,440 ft elevation (87 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Brewster 4W, KS (used) | 3,440 ft | May 9 | Oct 4 |
| Goodland, KS | 3,651 ft | May 2 | Oct 11 |
| Colby 1Sw, KS | 3,170 ft | May 2 | Oct 9 |
| Winona, KS | 3,323 ft | Apr 29 | Oct 17 |
Frost dates near Edson
- Brewster, KS 67732 · last May 9, first Oct 4
- Goodland, KS 67735 · last May 2, first Oct 11
- Levant, KS 67743 · last May 2, first Oct 9
- Colby, KS 67701 · last May 2, first Oct 9
- Kanorado, KS 67741 · last May 2, first Oct 11
- Winona, KS 67764 · last Apr 29, first Oct 17
- Bird City, KS 67731 · last May 4, first Oct 12
- Saint Francis, KS 67756 · last Apr 30, first Oct 10
Frequently asked questions
- When is the last frost in Edson, KS?
- For ZIP code 67733, the average last spring frost (32°F) is May 9, based on NOAA 1991-2020 climate normals for the Brewster 4W, KS weather station. There is a 1-in-10 chance of a frost after May 25.
- When is the first frost in Edson, KS?
- The average first fall frost (32°F) is October 4. There is a 1-in-10 chance of frost by September 21, so tender plants are at risk from that point on.
- How long is the growing season in 67733?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 145 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.