Frost dates for 08033Haddonfield, NJ
The average last spring frost in Haddonfield is April 15 and the average first fall frost is October 31, giving a typical growing season of about 199 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 15
- Average first fall frost
- Oct 31
- Growing season
- 199 days
Safer after May 1 (1-in-10 risk)
Possible by Oct 16 (1-in-10 risk)
Last frost typically in 163 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 14 · Apr 27 · May 15 | Oct 6 · Oct 19 · Nov 1 | 174 days | 100% |
| Frost / freeze (32°F) | Apr 1 · Apr 15 · May 1 | Oct 16 · Oct 31 · Nov 12 | 199 days | 100% |
| Hard freeze (28°F) | Mar 17 · Apr 1 · Apr 14 | Oct 31 · Nov 10 · Nov 24 | 223 days | 100% |
Planting calendar for Haddonfield
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 15 – May 21 |
| Tomatoes | Transplant outdoors | May 1 – Jul 11 |
| Peppers | Start seeds indoors | Mar 15 – Apr 15 |
| Peppers | Transplant outdoors | May 15 – Jun 15 |
| Eggplant | Start seeds indoors | Apr 1 – Apr 30 |
| Eggplant | Transplant outdoors | May 15 – Jun 15 |
| Cucumbers | Sow outdoors | May 15 – Jul 21 |
| Summer squash | Sow outdoors | May 1 – Jun 15 |
| Winter squash & pumpkins | Sow outdoors | May 15 – Jun 15 |
| Snap beans | Sow outdoors | May 1 – Aug 13 |
| Sweet corn | Sow outdoors | May 1 – Jul 11 |
| Watermelon & cantaloupe | Sow outdoors | May 15 – Jun 15 |
| Okra | Sow outdoors | May 8 – May 31 |
| Peas | Sow outdoors (spring) | Mar 15 – Apr 30 |
| Potatoes | Plant outdoors (spring) | Mar 15 – May 15 |
| Onions | Start seeds indoors (spring) | Feb 1 – Feb 28 |
| Onions | Transplant outdoors (spring) | Apr 1 – Apr 30 |
| Broccoli | Start seeds indoors (spring) | Feb 25 – Mar 31 |
| Broccoli | Transplant outdoors (spring) | Apr 1 – Apr 30 |
| Broccoli | Start seeds indoors (fall) | Jul 1 – Jul 11 |
| Broccoli | Transplant outdoors (fall) | Jul 31 – Aug 11 |
| Cabbage | Start seeds indoors (spring) | Feb 15 – Mar 15 |
| Cabbage | Transplant outdoors (spring) | Mar 15 – Apr 15 |
| Cabbage | Start seeds indoors (fall) | Jun 21 – Jul 21 |
| Cabbage | Transplant outdoors (fall) | Jul 21 – Aug 21 |
| Leaf lettuce | Sow outdoors (spring) | Mar 15 – May 31 |
| Leaf lettuce | Sow outdoors (fall) | Jul 21 – Sep 6 |
| Spinach | Sow outdoors (spring) | Mar 8 – Apr 21 |
| Spinach | Sow outdoors (fall) | Aug 7 – Sep 11 |
| Radishes | Sow outdoors (spring) | Mar 15 – May 5 |
| Radishes | Sow outdoors (fall) | Jul 21 – Sep 21 |
| Kale | Sow outdoors (spring) | Apr 1 – Apr 21 |
| Kale | Sow outdoors (fall) | Jul 14 – Aug 21 |
| Carrots | Sow outdoors (spring) | Apr 15 – May 31 |
| Carrots | Sow outdoors (fall) | Jun 21 – Aug 6 |
| Garlic | Plant outdoors (fall) | Oct 21 – Nov 21 |
Where these dates come from
ZIP code 08033 is matched to the NOAA station Pennsauken 1N, NJ, 8 km away, at 46 ft elevation (30 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Pennsauken 1N, NJ (used) | 46 ft | Apr 15 | Oct 31 |
| Moorestown, NJ | 45 ft | Apr 12 | Nov 1 |
| Phila Franklin Inst, PA | 60 ft | Mar 30 | Nov 17 |
| Philadelphia Intl Ap, PA | 10 ft | Apr 2 | Nov 10 |
Frost dates near Haddonfield
- Audubon, NJ 08106 · last Apr 15, first Oct 31
- Haddon Heights, NJ 08035 · last Apr 15, first Oct 31
- Collingswood, NJ 08108 · last Apr 15, first Oct 31
- Lawnside, NJ 08045 · last Apr 12, first Nov 1
- Barrington, NJ 08007 · last Apr 15, first Oct 31
- Cherry Hill, NJ 08034 · last Apr 12, first Nov 1
- Oaklyn, NJ 08107 · last Apr 15, first Oct 31
- Mount Ephraim, NJ 08059 · last Apr 15, first Oct 31
Frequently asked questions
- When is the last frost in Haddonfield, NJ?
- For ZIP code 08033, the average last spring frost (32°F) is April 15, based on NOAA 1991-2020 climate normals for the Pennsauken 1N, NJ weather station. There is a 1-in-10 chance of a frost after May 1.
- When is the first frost in Haddonfield, NJ?
- The average first fall frost (32°F) is October 31. There is a 1-in-10 chance of frost by October 16, so tender plants are at risk from that point on.
- How long is the growing season in 08033?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 199 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.