Frost dates for 64683Trenton, MO
The average last spring frost in Trenton is April 16 and the average first fall frost is October 20, giving a typical growing season of about 184 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 16
- Average first fall frost
- Oct 20
- Growing season
- 184 days
Safer after Apr 29 (1-in-10 risk)
Possible by Oct 5 (1-in-10 risk)
Last frost typically in 164 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 27 · May 9 | Sep 26 · Oct 11 · Oct 23 | 165 days | 100% |
| Frost / freeze (32°F) | Apr 3 · Apr 16 · Apr 29 | Oct 5 · Oct 20 · Nov 1 | 184 days | 100% |
| Hard freeze (28°F) | Mar 22 · Apr 6 · Apr 21 | Oct 16 · Oct 29 · Nov 11 | 204 days | 100% |
Planting calendar for Trenton
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 16 – May 22 |
| Tomatoes | Transplant outdoors | May 2 – Jun 30 |
| Peppers | Start seeds indoors | Mar 16 – Apr 16 |
| Peppers | Transplant outdoors | May 16 – Jun 16 |
| Eggplant | Start seeds indoors | Apr 2 – May 1 |
| Eggplant | Transplant outdoors | May 16 – Jun 16 |
| Cucumbers | Sow outdoors | May 16 – Jul 10 |
| Summer squash | Sow outdoors | May 2 – Jun 16 |
| Winter squash & pumpkins | Sow outdoors | May 16 – Jun 16 |
| Snap beans | Sow outdoors | May 2 – Aug 2 |
| Sweet corn | Sow outdoors | May 2 – Jun 30 |
| Watermelon & cantaloupe | Sow outdoors | May 16 – Jun 16 |
| Okra | Sow outdoors | May 9 – Jun 1 |
| Peas | Sow outdoors (spring) | Mar 16 – May 1 |
| Potatoes | Plant outdoors (spring) | Mar 16 – May 16 |
| Onions | Start seeds indoors (spring) | Feb 2 – Mar 1 |
| Onions | Transplant outdoors (spring) | Apr 2 – May 1 |
| Broccoli | Start seeds indoors (spring) | Feb 26 – Apr 1 |
| Broccoli | Transplant outdoors (spring) | Apr 2 – May 1 |
| Broccoli | Start seeds indoors (fall) | Jun 20 – Jun 30 |
| Broccoli | Transplant outdoors (fall) | Jul 20 – Jul 31 |
| Cabbage | Start seeds indoors (spring) | Feb 16 – Mar 16 |
| Cabbage | Transplant outdoors (spring) | Mar 16 – Apr 16 |
| Cabbage | Start seeds indoors (fall) | Jun 10 – Jul 10 |
| Cabbage | Transplant outdoors (fall) | Jul 10 – Aug 10 |
| Leaf lettuce | Sow outdoors (spring) | Mar 16 – Jun 1 |
| Leaf lettuce | Sow outdoors (fall) | Jul 10 – Aug 26 |
| Spinach | Sow outdoors (spring) | Mar 9 – Apr 22 |
| Spinach | Sow outdoors (fall) | Jul 27 – Aug 31 |
| Radishes | Sow outdoors (spring) | Mar 16 – May 6 |
| Radishes | Sow outdoors (fall) | Jul 10 – Sep 10 |
| Kale | Sow outdoors (spring) | Apr 2 – Apr 22 |
| Kale | Sow outdoors (fall) | Jul 3 – Aug 10 |
| Carrots | Sow outdoors (spring) | Apr 16 – Jun 1 |
| Carrots | Sow outdoors (fall) | Jun 10 – Jul 26 |
| Garlic | Plant outdoors (fall) | Oct 10 – Nov 10 |
Where these dates come from
ZIP code 64683 is matched to the NOAA station Trenton, MO, 0 km away, at 837 ft elevation (23 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Trenton, MO (used) | 837 ft | Apr 16 | Oct 20 |
| Spickard 7 W, MO | 875 ft | Apr 20 | Oct 16 |
| Chillicothe Agri-Sci, MO | 769 ft | Apr 15 | Oct 21 |
| Chillicothe 2S, MO | 780 ft | Apr 15 | Oct 21 |
Frost dates near Trenton
- Laredo, MO 64652 · last Apr 16, first Oct 20
- Spickard, MO 64679 · last Apr 20, first Oct 16
- Jamesport, MO 64648 · last Apr 19, first Oct 21
- Galt, MO 64641 · last Apr 16, first Oct 20
- Gilman City, MO 64642 · last Apr 20, first Oct 16
- Chula, MO 64635 · last Apr 15, first Oct 21
- Humphreys, MO 64646 · last Apr 16, first Oct 20
- Lock Springs, MO 64654 · last Apr 15, first Oct 21
Frequently asked questions
- When is the last frost in Trenton, MO?
- For ZIP code 64683, the average last spring frost (32°F) is April 16, based on NOAA 1991-2020 climate normals for the Trenton, MO weather station. There is a 1-in-10 chance of a frost after April 29.
- When is the first frost in Trenton, MO?
- The average first fall frost (32°F) is October 20. There is a 1-in-10 chance of frost by October 5, so tender plants are at risk from that point on.
- How long is the growing season in 64683?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 184 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.