Frost dates for 46325Hammond, IN
The average last spring frost in Hammond is April 29 and the average first fall frost is October 16, giving a typical growing season of about 171 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 29
- Average first fall frost
- Oct 16
- Growing season
- 171 days
Safer after May 14 (1-in-10 risk)
Possible by Oct 3 (1-in-10 risk)
Last frost typically in 178 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 25 · May 8 · May 25 | Sep 23 · Oct 6 · Oct 18 | 150 days | 100% |
| Frost / freeze (32°F) | Apr 14 · Apr 29 · May 14 | Oct 3 · Oct 16 · Oct 28 | 171 days | 100% |
| Hard freeze (28°F) | Apr 1 · Apr 16 · May 3 | Oct 13 · Oct 26 · Nov 8 | 193 days | 100% |
Planting calendar for Hammond
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 29 – Jun 4 |
| Tomatoes | Transplant outdoors | May 15 – Jun 26 |
| Peppers | Start seeds indoors | Mar 29 – Apr 29 |
| Peppers | Transplant outdoors | May 29 – Jun 29 |
| Eggplant | Start seeds indoors | Apr 15 – May 14 |
| Eggplant | Transplant outdoors | May 29 – Jun 29 |
| Cucumbers | Sow outdoors | May 29 – Jul 6 |
| Summer squash | Sow outdoors | May 15 – Jun 29 |
| Winter squash & pumpkins | Sow outdoors | May 29 – Jun 29 |
| Snap beans | Sow outdoors | May 15 – Jul 29 |
| Sweet corn | Sow outdoors | May 15 – Jun 26 |
| Watermelon & cantaloupe | Sow outdoors | May 29 – Jun 29 |
| Okra | Sow outdoors | May 22 – Jun 14 |
| Peas | Sow outdoors (spring) | Mar 29 – May 14 |
| Potatoes | Plant outdoors (spring) | Mar 29 – May 29 |
| Onions | Start seeds indoors (spring) | Feb 15 – Mar 14 |
| Onions | Transplant outdoors (spring) | Apr 15 – May 14 |
| Broccoli | Start seeds indoors (spring) | Mar 11 – Apr 14 |
| Broccoli | Transplant outdoors (spring) | Apr 15 – May 14 |
| Broccoli | Start seeds indoors (fall) | Jun 16 – Jun 26 |
| Broccoli | Transplant outdoors (fall) | Jul 16 – Jul 27 |
| Cabbage | Start seeds indoors (spring) | Mar 1 – Mar 29 |
| Cabbage | Transplant outdoors (spring) | Mar 29 – Apr 29 |
| Cabbage | Start seeds indoors (fall) | Jun 6 – Jul 6 |
| Cabbage | Transplant outdoors (fall) | Jul 6 – Aug 6 |
| Leaf lettuce | Sow outdoors (spring) | Mar 29 – Jun 14 |
| Leaf lettuce | Sow outdoors (fall) | Jul 6 – Aug 22 |
| Spinach | Sow outdoors (spring) | Mar 22 – May 5 |
| Spinach | Sow outdoors (fall) | Jul 23 – Aug 27 |
| Radishes | Sow outdoors (spring) | Mar 29 – May 19 |
| Radishes | Sow outdoors (fall) | Jul 6 – Sep 6 |
| Kale | Sow outdoors (spring) | Apr 15 – May 5 |
| Kale | Sow outdoors (fall) | Jun 29 – Aug 6 |
| Carrots | Sow outdoors (spring) | Apr 29 – Jun 14 |
| Carrots | Sow outdoors (fall) | Jun 6 – Jul 22 |
| Garlic | Plant outdoors (fall) | Oct 6 – Nov 6 |
Where these dates come from
ZIP code 46325 is matched to the NOAA station Lowell, IN, 22.2 km away, at 665 ft elevation (27 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Lowell, IN (used) | 665 ft | Apr 29 | Oct 16 |
| Park Forest, IL | 710 ft | Apr 23 | Oct 20 |
| Valparaiso Wtr Wks, IN | 800 ft | Apr 22 | Oct 25 |
| Indiana Dunes Nl, IN | 680 ft | Apr 22 | Oct 27 |
Frost dates near Hammond
- Merrillville, IN 46411 · last Apr 29, first Oct 16
- Crown Point, IN 46307 · last Apr 29, first Oct 16
- Schererville, IN 46375 · last Apr 23, first Oct 20
- Saint John, IN 46373 · last Apr 23, first Oct 20
- Griffith, IN 46319 · last Apr 23, first Oct 20
- Gary, IN 46408 · last Apr 22, first Oct 27
- Dyer, IN 46311 · last Apr 23, first Oct 20
- Highland, IN 46322 · last Apr 23, first Oct 20
Frequently asked questions
- When is the last frost in Hammond, IN?
- For ZIP code 46325, the average last spring frost (32°F) is April 29, based on NOAA 1991-2020 climate normals for the Lowell, IN weather station. There is a 1-in-10 chance of a frost after May 14.
- When is the first frost in Hammond, IN?
- The average first fall frost (32°F) is October 16. There is a 1-in-10 chance of frost by October 3, so tender plants are at risk from that point on.
- How long is the growing season in 46325?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 171 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.