Frost dates for 61747Hopedale, IL
The average last spring frost in Hopedale is April 21 and the average first fall frost is October 17, giving a typical growing season of about 178 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 21
- Average first fall frost
- Oct 17
- Growing season
- 178 days
Safer after May 7 (1-in-10 risk)
Possible by Oct 3 (1-in-10 risk)
Last frost typically in 173 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 18 · May 2 · May 18 | Sep 25 · Oct 6 · Oct 19 | 156 days | 100% |
| Frost / freeze (32°F) | Apr 7 · Apr 21 · May 7 | Oct 3 · Oct 17 · Oct 30 | 178 days | 100% |
| Hard freeze (28°F) | Mar 28 · Apr 9 · Apr 27 | Oct 11 · Oct 27 · Nov 10 | 198 days | 100% |
Planting calendar for Hopedale
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 21 – May 27 |
| Tomatoes | Transplant outdoors | May 7 – Jun 27 |
| Peppers | Start seeds indoors | Mar 21 – Apr 21 |
| Peppers | Transplant outdoors | May 21 – Jun 21 |
| Eggplant | Start seeds indoors | Apr 7 – May 6 |
| Eggplant | Transplant outdoors | May 21 – Jun 21 |
| Cucumbers | Sow outdoors | May 21 – Jul 7 |
| Summer squash | Sow outdoors | May 7 – Jun 21 |
| Winter squash & pumpkins | Sow outdoors | May 21 – Jun 21 |
| Snap beans | Sow outdoors | May 7 – Jul 30 |
| Sweet corn | Sow outdoors | May 7 – Jun 27 |
| Watermelon & cantaloupe | Sow outdoors | May 21 – Jun 21 |
| Okra | Sow outdoors | May 14 – Jun 6 |
| Peas | Sow outdoors (spring) | Mar 21 – May 6 |
| Potatoes | Plant outdoors (spring) | Mar 21 – May 21 |
| Onions | Start seeds indoors (spring) | Feb 7 – Mar 6 |
| Onions | Transplant outdoors (spring) | Apr 7 – May 6 |
| Broccoli | Start seeds indoors (spring) | Mar 3 – Apr 6 |
| Broccoli | Transplant outdoors (spring) | Apr 7 – May 6 |
| Broccoli | Start seeds indoors (fall) | Jun 17 – Jun 27 |
| Broccoli | Transplant outdoors (fall) | Jul 17 – Jul 28 |
| Cabbage | Start seeds indoors (spring) | Feb 21 – Mar 21 |
| Cabbage | Transplant outdoors (spring) | Mar 21 – Apr 21 |
| Cabbage | Start seeds indoors (fall) | Jun 7 – Jul 7 |
| Cabbage | Transplant outdoors (fall) | Jul 7 – Aug 7 |
| Leaf lettuce | Sow outdoors (spring) | Mar 21 – Jun 6 |
| Leaf lettuce | Sow outdoors (fall) | Jul 7 – Aug 23 |
| Spinach | Sow outdoors (spring) | Mar 14 – Apr 27 |
| Spinach | Sow outdoors (fall) | Jul 24 – Aug 28 |
| Radishes | Sow outdoors (spring) | Mar 21 – May 11 |
| Radishes | Sow outdoors (fall) | Jul 7 – Sep 7 |
| Kale | Sow outdoors (spring) | Apr 7 – Apr 27 |
| Kale | Sow outdoors (fall) | Jun 30 – Aug 7 |
| Carrots | Sow outdoors (spring) | Apr 21 – Jun 6 |
| Carrots | Sow outdoors (fall) | Jun 7 – Jul 23 |
| Garlic | Plant outdoors (fall) | Oct 7 – Nov 7 |
Where these dates come from
ZIP code 61747 is matched to the NOAA station Congerville 2Nw, IL, 26.4 km away, at 640 ft elevation (7 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Congerville 2Nw, IL (used) | 640 ft | Apr 21 | Oct 17 |
| Bloomington 5W, IL | 852 ft | Apr 21 | Oct 20 |
| Lincoln, IL | 583 ft | Apr 20 | Oct 16 |
| Peoria Gtr Peoria Ap, IL | 650 ft | Apr 16 | Oct 23 |
Frost dates near Hopedale
- Minier, IL 61759 · last Apr 21, first Oct 17
- Tremont, IL 61568 · last Apr 21, first Oct 17
- Armington, IL 61721 · last Apr 20, first Oct 16
- Delavan, IL 61734 · last Apr 20, first Oct 16
- Mackinaw, IL 61755 · last Apr 21, first Oct 17
- Emden, IL 62635 · last Apr 20, first Oct 16
- Stanford, IL 61774 · last Apr 21, first Oct 17
- Green Valley, IL 61534 · last Apr 16, first Oct 23
Frequently asked questions
- When is the last frost in Hopedale, IL?
- For ZIP code 61747, the average last spring frost (32°F) is April 21, based on NOAA 1991-2020 climate normals for the Congerville 2Nw, IL weather station. There is a 1-in-10 chance of a frost after May 7.
- When is the first frost in Hopedale, IL?
- The average first fall frost (32°F) is October 17. 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 61747?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 178 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.