Frost dates for 63459New London, MO
The average last spring frost in New London is April 4 and the average first fall frost is November 4, giving a typical growing season of about 212 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 4
- Average first fall frost
- Nov 4
- Growing season
- 212 days
Safer after Apr 19 (1-in-10 risk)
Possible by Oct 23 (1-in-10 risk)
First frost typically in 4 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 2 · Apr 14 · Apr 30 | Oct 12 · Oct 24 · Nov 5 | 191 days | 100% |
| Frost / freeze (32°F) | Mar 20 · Apr 4 · Apr 19 | Oct 23 · Nov 4 · Nov 18 | 212 days | 100% |
| Hard freeze (28°F) | Mar 8 · Mar 26 · Apr 8 | Nov 1 · Nov 14 · Nov 30 | 233 days | 100% |
Planting calendar for New London
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 4 – May 10 |
| Tomatoes | Transplant outdoors | Apr 20 – Jul 15 |
| Peppers | Start seeds indoors | Mar 4 – Apr 4 |
| Peppers | Transplant outdoors | May 4 – Jun 4 |
| Eggplant | Start seeds indoors | Mar 21 – Apr 19 |
| Eggplant | Transplant outdoors | May 4 – Jun 4 |
| Cucumbers | Sow outdoors | May 4 – Jul 25 |
| Summer squash | Sow outdoors | Apr 20 – Jun 4 |
| Winter squash & pumpkins | Sow outdoors | May 4 – Jun 4 |
| Snap beans | Sow outdoors | Apr 20 – Aug 17 |
| Sweet corn | Sow outdoors | Apr 20 – Jul 15 |
| Watermelon & cantaloupe | Sow outdoors | May 4 – Jun 4 |
| Okra | Sow outdoors | Apr 27 – May 20 |
| Peas | Sow outdoors (spring) | Mar 4 – Apr 19 |
| Potatoes | Plant outdoors (spring) | Mar 4 – May 4 |
| Onions | Start seeds indoors (spring) | Jan 21 – Feb 17 |
| Onions | Transplant outdoors (spring) | Mar 21 – Apr 19 |
| Broccoli | Start seeds indoors (spring) | Feb 14 – Mar 20 |
| Broccoli | Transplant outdoors (spring) | Mar 21 – Apr 19 |
| Broccoli | Start seeds indoors (fall) | Jul 5 – Jul 15 |
| Broccoli | Transplant outdoors (fall) | Aug 4 – Aug 15 |
| Cabbage | Start seeds indoors (spring) | Feb 4 – Mar 4 |
| Cabbage | Transplant outdoors (spring) | Mar 4 – Apr 4 |
| Cabbage | Start seeds indoors (fall) | Jun 25 – Jul 25 |
| Cabbage | Transplant outdoors (fall) | Jul 25 – Aug 25 |
| Leaf lettuce | Sow outdoors (spring) | Mar 4 – May 20 |
| Leaf lettuce | Sow outdoors (fall) | Jul 25 – Sep 10 |
| Spinach | Sow outdoors (spring) | Feb 25 – Apr 10 |
| Spinach | Sow outdoors (fall) | Aug 11 – Sep 15 |
| Radishes | Sow outdoors (spring) | Mar 4 – Apr 24 |
| Radishes | Sow outdoors (fall) | Jul 25 – Sep 25 |
| Kale | Sow outdoors (spring) | Mar 21 – Apr 10 |
| Kale | Sow outdoors (fall) | Jul 18 – Aug 25 |
| Carrots | Sow outdoors (spring) | Apr 4 – May 20 |
| Carrots | Sow outdoors (fall) | Jun 25 – Aug 10 |
| Garlic | Plant outdoors (fall) | Oct 25 – Nov 25 |
Where these dates come from
ZIP code 63459 is matched to the NOAA station Saverton L&D 22, MO, 13.4 km away, at 472 ft elevation (109 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Saverton L&D 22, MO (used) | 472 ft | Apr 4 | Nov 4 |
| Hannibal Wtr Wks, MO | 712 ft | Apr 10 | Oct 27 |
| Monroe City, MO | 741 ft | Apr 12 | Oct 22 |
| Vandalia, MO | 764 ft | Apr 11 | Oct 23 |
Frost dates near New London
- Saverton, MO 63467 · last Apr 4, first Nov 4
- Hannibal, MO 63401 · last Apr 10, first Oct 27
- Frankford, MO 63441 · last Apr 4, first Nov 4
- Center, MO 63436 · last Apr 11, first Oct 23
- Ashburn, MO 63433 · last Apr 4, first Nov 4
- Hull, IL 62343 · last Apr 4, first Nov 4
- Kinderhook, IL 62345 · last Apr 4, first Nov 4
- Palmyra, MO 63461 · last Apr 10, first Oct 27
Frequently asked questions
- When is the last frost in New London, MO?
- For ZIP code 63459, the average last spring frost (32°F) is April 4, based on NOAA 1991-2020 climate normals for the Saverton L&D 22, MO weather station. There is a 1-in-10 chance of a frost after April 19.
- When is the first frost in New London, MO?
- The average first fall frost (32°F) is November 4. There is a 1-in-10 chance of frost by October 23, so tender plants are at risk from that point on.
- How long is the growing season in 63459?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 212 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.