Frost dates for 47547Jasper, IN
The average last spring frost in Jasper is April 25 and the average first fall frost is October 15, giving a typical growing season of about 172 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 25
- Average first fall frost
- Oct 15
- Growing season
- 172 days
Safer after May 12 (1-in-10 risk)
Possible by Oct 3 (1-in-10 risk)
Last frost typically in 174 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 21 · May 6 · May 23 | Sep 23 · Oct 6 · Oct 17 | 152 days | 100% |
| Frost / freeze (32°F) | Apr 10 · Apr 25 · May 12 | Oct 3 · Oct 15 · Oct 26 | 172 days | 100% |
| Hard freeze (28°F) | Apr 1 · Apr 13 · May 2 | Oct 12 · Oct 25 · Nov 5 | 192 days | 100% |
Planting calendar for Jasper
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 25 – May 31 |
| Tomatoes | Transplant outdoors | May 11 – Jun 25 |
| Peppers | Start seeds indoors | Mar 25 – Apr 25 |
| Peppers | Transplant outdoors | May 25 – Jun 25 |
| Eggplant | Start seeds indoors | Apr 11 – May 10 |
| Eggplant | Transplant outdoors | May 25 – Jun 25 |
| Cucumbers | Sow outdoors | May 25 – Jul 5 |
| Summer squash | Sow outdoors | May 11 – Jun 25 |
| Winter squash & pumpkins | Sow outdoors | May 25 – Jun 25 |
| Snap beans | Sow outdoors | May 11 – Jul 28 |
| Sweet corn | Sow outdoors | May 11 – Jun 25 |
| Watermelon & cantaloupe | Sow outdoors | May 25 – Jun 25 |
| Okra | Sow outdoors | May 18 – Jun 10 |
| Peas | Sow outdoors (spring) | Mar 25 – May 10 |
| Potatoes | Plant outdoors (spring) | Mar 25 – May 25 |
| Onions | Start seeds indoors (spring) | Feb 11 – Mar 10 |
| Onions | Transplant outdoors (spring) | Apr 11 – May 10 |
| Broccoli | Start seeds indoors (spring) | Mar 7 – Apr 10 |
| Broccoli | Transplant outdoors (spring) | Apr 11 – May 10 |
| Broccoli | Start seeds indoors (fall) | Jun 15 – Jun 25 |
| Broccoli | Transplant outdoors (fall) | Jul 15 – Jul 26 |
| Cabbage | Start seeds indoors (spring) | Feb 25 – Mar 25 |
| Cabbage | Transplant outdoors (spring) | Mar 25 – Apr 25 |
| Cabbage | Start seeds indoors (fall) | Jun 5 – Jul 5 |
| Cabbage | Transplant outdoors (fall) | Jul 5 – Aug 5 |
| Leaf lettuce | Sow outdoors (spring) | Mar 25 – Jun 10 |
| Leaf lettuce | Sow outdoors (fall) | Jul 5 – Aug 21 |
| Spinach | Sow outdoors (spring) | Mar 18 – May 1 |
| Spinach | Sow outdoors (fall) | Jul 22 – Aug 26 |
| Radishes | Sow outdoors (spring) | Mar 25 – May 15 |
| Radishes | Sow outdoors (fall) | Jul 5 – Sep 5 |
| Kale | Sow outdoors (spring) | Apr 11 – May 1 |
| Kale | Sow outdoors (fall) | Jun 28 – Aug 5 |
| Carrots | Sow outdoors (spring) | Apr 25 – Jun 10 |
| Carrots | Sow outdoors (fall) | Jun 5 – Jul 21 |
| Garlic | Plant outdoors (fall) | Oct 5 – Nov 5 |
Where these dates come from
ZIP code 47547 is matched to the NOAA station Dubois S In Forage Fm, IN, 18.5 km away, at 690 ft elevation (106 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Dubois S In Forage Fm, IN (used) | 690 ft | Apr 25 | Oct 15 |
| Patoka Lake, IN | 561 ft | Apr 10 | Nov 1 |
| Shoals 8 S, IN | 477 ft | Apr 15 | Oct 23 |
| Saint Meinrad, IN | 510 ft | Apr 11 | Oct 26 |
Frost dates near Jasper
- Jasper, IN 47549 · last Apr 25, first Oct 15
- Saint Anthony, IN 47575 · last Apr 25, first Oct 15
- Huntingburg, IN 47542 · last Apr 11, first Oct 26
- Celestine, IN 47521 · last Apr 25, first Oct 15
- Schnellville, IN 47580 · last Apr 25, first Oct 15
- Ireland, IN 47545 · last Apr 20, first Oct 22
- Dubois, IN 47527 · last Apr 25, first Oct 15
- Ferdinand, IN 47532 · last Apr 11, first Oct 26
Frequently asked questions
- When is the last frost in Jasper, IN?
- For ZIP code 47547, the average last spring frost (32°F) is April 25, based on NOAA 1991-2020 climate normals for the Dubois S In Forage Fm, IN weather station. There is a 1-in-10 chance of a frost after May 12.
- When is the first frost in Jasper, IN?
- The average first fall frost (32°F) is October 15. 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 47547?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 172 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.