Frost dates for 47022Guilford, IN
The average last spring frost in Guilford is April 30 and the average first fall frost is October 16, giving a typical growing season of about 168 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 30
- Average first fall frost
- Oct 16
- Growing season
- 168 days
Safer after May 15 (1-in-10 risk)
Possible by Oct 3 (1-in-10 risk)
Last frost typically in 179 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 24 · May 8 · May 23 | Sep 23 · Oct 6 · Oct 18 | 151 days | 100% |
| Frost / freeze (32°F) | Apr 14 · Apr 30 · May 15 | Oct 3 · Oct 16 · Oct 29 | 168 days | 100% |
| Hard freeze (28°F) | Apr 3 · Apr 17 · May 4 | Oct 12 · Oct 26 · Nov 6 | 191 days | 100% |
Planting calendar for Guilford
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 30 – Jun 5 |
| Tomatoes | Transplant outdoors | May 16 – Jun 26 |
| Peppers | Start seeds indoors | Mar 30 – Apr 30 |
| Peppers | Transplant outdoors | May 30 – Jun 30 |
| Eggplant | Start seeds indoors | Apr 16 – May 15 |
| Eggplant | Transplant outdoors | May 30 – Jun 30 |
| Cucumbers | Sow outdoors | May 30 – Jul 6 |
| Summer squash | Sow outdoors | May 16 – Jun 30 |
| Winter squash & pumpkins | Sow outdoors | May 30 – Jun 30 |
| Snap beans | Sow outdoors | May 16 – Jul 29 |
| Sweet corn | Sow outdoors | May 16 – Jun 26 |
| Watermelon & cantaloupe | Sow outdoors | May 30 – Jun 30 |
| Okra | Sow outdoors | May 23 – Jun 15 |
| Peas | Sow outdoors (spring) | Mar 30 – May 15 |
| Potatoes | Plant outdoors (spring) | Mar 30 – May 30 |
| Onions | Start seeds indoors (spring) | Feb 16 – Mar 15 |
| Onions | Transplant outdoors (spring) | Apr 16 – May 15 |
| Broccoli | Start seeds indoors (spring) | Mar 12 – Apr 15 |
| Broccoli | Transplant outdoors (spring) | Apr 16 – May 15 |
| Broccoli | Start seeds indoors (fall) | Jun 16 – Jun 26 |
| Broccoli | Transplant outdoors (fall) | Jul 16 – Jul 27 |
| Cabbage | Start seeds indoors (spring) | Mar 2 – Mar 30 |
| Cabbage | Transplant outdoors (spring) | Mar 30 – Apr 30 |
| Cabbage | Start seeds indoors (fall) | Jun 6 – Jul 6 |
| Cabbage | Transplant outdoors (fall) | Jul 6 – Aug 6 |
| Leaf lettuce | Sow outdoors (spring) | Mar 30 – Jun 15 |
| Leaf lettuce | Sow outdoors (fall) | Jul 6 – Aug 22 |
| Spinach | Sow outdoors (spring) | Mar 23 – May 6 |
| Spinach | Sow outdoors (fall) | Jul 23 – Aug 27 |
| Radishes | Sow outdoors (spring) | Mar 30 – May 20 |
| Radishes | Sow outdoors (fall) | Jul 6 – Sep 6 |
| Kale | Sow outdoors (spring) | Apr 16 – May 6 |
| Kale | Sow outdoors (fall) | Jun 29 – Aug 6 |
| Carrots | Sow outdoors (spring) | Apr 30 – Jun 15 |
| Carrots | Sow outdoors (fall) | Jun 6 – Jul 22 |
| Garlic | Plant outdoors (fall) | Oct 6 – Nov 6 |
Where these dates come from
ZIP code 47022 is matched to the NOAA station Milan 5 Ne, IN, 9.2 km away, at 975 ft elevation (96 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Milan 5 Ne, IN (used) | 975 ft | Apr 30 | Oct 16 |
| Brookville, IN | 630 ft | Apr 20 | Oct 21 |
| Cincinnati-Fernbank, OH | 500 ft | Apr 13 | Oct 31 |
| Cheviot 3 W, OH | 853 ft | Apr 16 | Oct 28 |
Frost dates near Guilford
- Lawrenceburg, IN 47025 · last Apr 13, first Oct 31
- Sunman, IN 47041 · last Apr 30, first Oct 16
- West Harrison, IN 47060 · last Apr 20, first Oct 21
- New Trenton, IN 47035 · last Apr 20, first Oct 21
- Aurora, IN 47001 · last Apr 13, first Oct 31
- Moores Hill, IN 47032 · last Apr 30, first Oct 16
- Milan, IN 47031 · last Apr 30, first Oct 16
- Harrison, OH 45030 · last Apr 19, first Oct 22
Frequently asked questions
- When is the last frost in Guilford, IN?
- For ZIP code 47022, the average last spring frost (32°F) is April 30, based on NOAA 1991-2020 climate normals for the Milan 5 Ne, IN weather station. There is a 1-in-10 chance of a frost after May 15.
- When is the first frost in Guilford, 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 47022?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 168 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.