Frost dates for 47916Alamo, IN
The average last spring frost in Alamo is April 27 and the average first fall frost is October 12, giving a typical growing season of about 167 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 27
- Average first fall frost
- Oct 12
- Growing season
- 167 days
Safer after May 13 (1-in-10 risk)
Possible by Sep 26 (1-in-10 risk)
Last frost typically in 176 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 22 · May 7 · May 22 | Sep 19 · Oct 2 · Oct 15 | 148 days | 100% |
| Frost / freeze (32°F) | Apr 11 · Apr 27 · May 13 | Sep 26 · Oct 12 · Oct 25 | 167 days | 100% |
| Hard freeze (28°F) | Mar 31 · Apr 14 · May 2 | Oct 6 · Oct 23 · Nov 6 | 188 days | 100% |
Planting calendar for Alamo
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 27 – Jun 2 |
| Tomatoes | Transplant outdoors | May 13 – Jun 22 |
| Peppers | Start seeds indoors | Mar 27 – Apr 27 |
| Peppers | Transplant outdoors | May 27 – Jun 27 |
| Eggplant | Start seeds indoors | Apr 13 – May 12 |
| Eggplant | Transplant outdoors | May 27 – Jun 27 |
| Cucumbers | Sow outdoors | May 27 – Jul 2 |
| Summer squash | Sow outdoors | May 13 – Jun 27 |
| Winter squash & pumpkins | Sow outdoors | May 27 – Jun 27 |
| Snap beans | Sow outdoors | May 13 – Jul 25 |
| Sweet corn | Sow outdoors | May 13 – Jun 22 |
| Watermelon & cantaloupe | Sow outdoors | May 27 – Jun 27 |
| Okra | Sow outdoors | May 20 – Jun 12 |
| Peas | Sow outdoors (spring) | Mar 27 – May 12 |
| Potatoes | Plant outdoors (spring) | Mar 27 – May 27 |
| Onions | Start seeds indoors (spring) | Feb 13 – Mar 12 |
| Onions | Transplant outdoors (spring) | Apr 13 – May 12 |
| Broccoli | Start seeds indoors (spring) | Mar 9 – Apr 12 |
| Broccoli | Transplant outdoors (spring) | Apr 13 – May 12 |
| Broccoli | Start seeds indoors (fall) | Jun 12 – Jun 22 |
| Broccoli | Transplant outdoors (fall) | Jul 12 – Jul 23 |
| Cabbage | Start seeds indoors (spring) | Feb 27 – Mar 27 |
| Cabbage | Transplant outdoors (spring) | Mar 27 – Apr 27 |
| Cabbage | Start seeds indoors (fall) | Jun 2 – Jul 2 |
| Cabbage | Transplant outdoors (fall) | Jul 2 – Aug 2 |
| Leaf lettuce | Sow outdoors (spring) | Mar 27 – Jun 12 |
| Leaf lettuce | Sow outdoors (fall) | Jul 2 – Aug 18 |
| Spinach | Sow outdoors (spring) | Mar 20 – May 3 |
| Spinach | Sow outdoors (fall) | Jul 19 – Aug 23 |
| Radishes | Sow outdoors (spring) | Mar 27 – May 17 |
| Radishes | Sow outdoors (fall) | Jul 2 – Sep 2 |
| Kale | Sow outdoors (spring) | Apr 13 – May 3 |
| Kale | Sow outdoors (fall) | Jun 25 – Aug 2 |
| Carrots | Sow outdoors (spring) | Apr 27 – Jun 12 |
| Carrots | Sow outdoors (fall) | Jun 2 – Jul 18 |
| Garlic | Plant outdoors (fall) | Oct 2 – Nov 2 |
Where these dates come from
ZIP code 47916 is matched to the NOAA station Crawfordsville 6 Se, IN, 21.8 km away, at 836 ft elevation (22 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Crawfordsville 6 Se, IN (used) | 836 ft | Apr 27 | Oct 12 |
| Rockville, IN | 689 ft | Apr 30 | Oct 12 |
| Attica 2E, IN | 727 ft | Apr 22 | Oct 17 |
| Lafayette 8 S, IN | 732 ft | Apr 20 | Oct 20 |
Frost dates near Alamo
- Wallace, IN 47988 · last Apr 30, first Oct 12
- Waveland, IN 47989 · last Apr 27, first Oct 12
- Waynetown, IN 47990 · last Apr 27, first Oct 12
- New Market, IN 47965 · last Apr 27, first Oct 12
- Marshall, IN 47859 · last Apr 30, first Oct 12
- Crawfordsville, IN 47933 · last Apr 27, first Oct 12
- Hillsboro, IN 47949 · last Apr 22, first Oct 17
- Kingman, IN 47952 · last Apr 23, first Oct 14
Frequently asked questions
- When is the last frost in Alamo, IN?
- For ZIP code 47916, the average last spring frost (32°F) is April 27, based on NOAA 1991-2020 climate normals for the Crawfordsville 6 Se, IN weather station. There is a 1-in-10 chance of a frost after May 13.
- When is the first frost in Alamo, IN?
- The average first fall frost (32°F) is October 12. There is a 1-in-10 chance of frost by September 26, so tender plants are at risk from that point on.
- How long is the growing season in 47916?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 167 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.