Frost dates for 80749Sedgwick, CO
The average last spring frost in Sedgwick is May 6 and the average first fall frost is October 7, giving a typical growing season of about 152 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 6
- Average first fall frost
- Oct 7
- Growing season
- 152 days
Safer after May 18 (1-in-10 risk)
Possible by Sep 24 (1-in-10 risk)
Last frost typically in 191 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 6 · May 15 · May 27 | Sep 16 · Sep 29 · Oct 10 | 135 days | 100% |
| Frost / freeze (32°F) | Apr 24 · May 6 · May 18 | Sep 24 · Oct 7 · Oct 19 | 152 days | 100% |
| Hard freeze (28°F) | Apr 12 · Apr 27 · May 9 | Oct 3 · Oct 16 · Oct 29 | 171 days | 100% |
Planting calendar for Sedgwick
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 5 – Jun 11 |
| Tomatoes | Transplant outdoors | May 22 – Jun 17 |
| Peppers | Start seeds indoors | Apr 5 – May 6 |
| Peppers | Transplant outdoors | Jun 5 – Jul 6 |
| Eggplant | Start seeds indoors | Apr 22 – May 21 |
| Eggplant | Transplant outdoors | Jun 5 – Jul 6 |
| Cucumbers | Sow outdoors | Jun 5 – Jun 27 |
| Summer squash | Sow outdoors | May 22 – Jul 6 |
| Winter squash & pumpkins | Sow outdoors | Jun 5 – Jul 6 |
| Snap beans | Sow outdoors | May 22 – Jul 20 |
| Sweet corn | Sow outdoors | May 22 – Jun 17 |
| Watermelon & cantaloupe | Sow outdoors | Jun 5 – Jul 6 |
| Okra | Sow outdoors | May 29 – Jun 21 |
| Peas | Sow outdoors (spring) | Apr 5 – May 21 |
| Potatoes | Plant outdoors (spring) | Apr 5 – Jun 5 |
| Onions | Start seeds indoors (spring) | Feb 22 – Mar 21 |
| Onions | Transplant outdoors (spring) | Apr 22 – May 21 |
| Broccoli | Start seeds indoors (spring) | Mar 18 – Apr 21 |
| Broccoli | Transplant outdoors (spring) | Apr 22 – May 21 |
| Broccoli | Start seeds indoors (fall) | Jun 7 – Jun 17 |
| Broccoli | Transplant outdoors (fall) | Jul 7 – Jul 18 |
| Cabbage | Start seeds indoors (spring) | Mar 8 – Apr 5 |
| Cabbage | Transplant outdoors (spring) | Apr 5 – May 6 |
| Cabbage | Start seeds indoors (fall) | May 28 – Jun 27 |
| Cabbage | Transplant outdoors (fall) | Jun 27 – Jul 28 |
| Leaf lettuce | Sow outdoors (spring) | Apr 5 – Jun 21 |
| Leaf lettuce | Sow outdoors (fall) | Jun 27 – Aug 13 |
| Spinach | Sow outdoors (spring) | Mar 29 – May 12 |
| Spinach | Sow outdoors (fall) | Jul 14 – Aug 18 |
| Radishes | Sow outdoors (spring) | Apr 5 – May 26 |
| Radishes | Sow outdoors (fall) | Jun 27 – Aug 28 |
| Kale | Sow outdoors (spring) | Apr 22 – May 12 |
| Kale | Sow outdoors (fall) | Jun 20 – Jul 28 |
| Carrots | Sow outdoors (spring) | May 6 – Jun 21 |
| Carrots | Sow outdoors (fall) | May 28 – Jul 13 |
| Garlic | Plant outdoors (fall) | Sep 27 – Oct 28 |
Where these dates come from
ZIP code 80749 is matched to the NOAA station Sedgwick 5 S, CO, 5.1 km away, at 3,996 ft elevation (377 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Sedgwick 5 S, CO (used) | 3,996 ft | May 6 | Oct 7 |
| Chappell, NE | 3,710 ft | May 8 | Oct 5 |
| Crook, CO | 3,709 ft | May 11 | Oct 4 |
| Julesburg, CO | 3,477 ft | May 7 | Oct 6 |
Frost dates near Sedgwick
- Ovid, CO 80744 · last May 7, first Oct 6
- Chappell, NE 69129 · last May 8, first Oct 5
- Julesburg, CO 80737 · last May 7, first Oct 6
- Crook, CO 80726 · last May 11, first Oct 4
- Haxtun, CO 80731 · last May 6, first Oct 7
- Lodgepole, NE 69149 · last May 9, first Oct 3
- Paoli, CO 80746 · last May 11, first Oct 3
- Amherst, CO 80721 · last May 11, first Oct 3
Frequently asked questions
- When is the last frost in Sedgwick, CO?
- For ZIP code 80749, the average last spring frost (32°F) is May 6, based on NOAA 1991-2020 climate normals for the Sedgwick 5 S, CO weather station. There is a 1-in-10 chance of a frost after May 18.
- When is the first frost in Sedgwick, CO?
- The average first fall frost (32°F) is October 7. There is a 1-in-10 chance of frost by September 24, so tender plants are at risk from that point on.
- How long is the growing season in 80749?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 152 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.