Frost dates for 62313Basco, IL
The average last spring frost in Basco is April 13 and the average first fall frost is October 22, giving a typical growing season of about 191 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 13
- Average first fall frost
- Oct 22
- Growing season
- 191 days
Safer after Apr 30 (1-in-10 risk)
Possible by Oct 8 (1-in-10 risk)
Last frost typically in 161 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 11 · Apr 25 · May 10 | Sep 25 · Oct 12 · Oct 25 | 170 days | 100% |
| Frost / freeze (32°F) | Mar 30 · Apr 13 · Apr 30 | Oct 8 · Oct 22 · Nov 4 | 191 days | 100% |
| Hard freeze (28°F) | Mar 18 · Apr 3 · Apr 20 | Oct 20 · Nov 1 · Nov 15 | 212 days | 100% |
Planting calendar for Basco
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 13 – May 19 |
| Tomatoes | Transplant outdoors | Apr 29 – Jul 2 |
| Peppers | Start seeds indoors | Mar 13 – Apr 13 |
| Peppers | Transplant outdoors | May 13 – Jun 13 |
| Eggplant | Start seeds indoors | Mar 30 – Apr 28 |
| Eggplant | Transplant outdoors | May 13 – Jun 13 |
| Cucumbers | Sow outdoors | May 13 – Jul 12 |
| Summer squash | Sow outdoors | Apr 29 – Jun 13 |
| Winter squash & pumpkins | Sow outdoors | May 13 – Jun 13 |
| Snap beans | Sow outdoors | Apr 29 – Aug 4 |
| Sweet corn | Sow outdoors | Apr 29 – Jul 2 |
| Watermelon & cantaloupe | Sow outdoors | May 13 – Jun 13 |
| Okra | Sow outdoors | May 6 – May 29 |
| Peas | Sow outdoors (spring) | Mar 13 – Apr 28 |
| Potatoes | Plant outdoors (spring) | Mar 13 – May 13 |
| Onions | Start seeds indoors (spring) | Jan 30 – Feb 26 |
| Onions | Transplant outdoors (spring) | Mar 30 – Apr 28 |
| Broccoli | Start seeds indoors (spring) | Feb 23 – Mar 29 |
| Broccoli | Transplant outdoors (spring) | Mar 30 – Apr 28 |
| Broccoli | Start seeds indoors (fall) | Jun 22 – Jul 2 |
| Broccoli | Transplant outdoors (fall) | Jul 22 – Aug 2 |
| Cabbage | Start seeds indoors (spring) | Feb 13 – Mar 13 |
| Cabbage | Transplant outdoors (spring) | Mar 13 – Apr 13 |
| Cabbage | Start seeds indoors (fall) | Jun 12 – Jul 12 |
| Cabbage | Transplant outdoors (fall) | Jul 12 – Aug 12 |
| Leaf lettuce | Sow outdoors (spring) | Mar 13 – May 29 |
| Leaf lettuce | Sow outdoors (fall) | Jul 12 – Aug 28 |
| Spinach | Sow outdoors (spring) | Mar 6 – Apr 19 |
| Spinach | Sow outdoors (fall) | Jul 29 – Sep 2 |
| Radishes | Sow outdoors (spring) | Mar 13 – May 3 |
| Radishes | Sow outdoors (fall) | Jul 12 – Sep 12 |
| Kale | Sow outdoors (spring) | Mar 30 – Apr 19 |
| Kale | Sow outdoors (fall) | Jul 5 – Aug 12 |
| Carrots | Sow outdoors (spring) | Apr 13 – May 29 |
| Carrots | Sow outdoors (fall) | Jun 12 – Jul 28 |
| Garlic | Plant outdoors (fall) | Oct 12 – Nov 12 |
Where these dates come from
ZIP code 62313 is matched to the NOAA station Bentley, IL, 7.4 km away, at 650 ft elevation (4 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Bentley, IL (used) | 650 ft | Apr 13 | Oct 22 |
| Keokuk Lock Dam 19, IA | 527 ft | Apr 10 | Oct 27 |
| Golden, IL | 718 ft | Apr 18 | Oct 21 |
| Canton L&D 20, MO | 490 ft | Apr 11 | Oct 23 |
Frost dates near Basco
- West Point, IL 62380 · last Apr 13, first Oct 22
- Elvaston, IL 62334 · last Apr 13, first Oct 22
- Carthage, IL 62321 · last Apr 13, first Oct 22
- Hamilton, IL 62341 · last Apr 10, first Oct 27
- Bowen, IL 62316 · last Apr 13, first Oct 22
- Sutter, IL 62373 · last Apr 10, first Oct 27
- Ferris, IL 62336 · last Apr 13, first Oct 22
- Keokuk, IA 52632 · last Apr 10, first Oct 27
Frequently asked questions
- When is the last frost in Basco, IL?
- For ZIP code 62313, the average last spring frost (32°F) is April 13, based on NOAA 1991-2020 climate normals for the Bentley, IL weather station. There is a 1-in-10 chance of a frost after April 30.
- When is the first frost in Basco, IL?
- The average first fall frost (32°F) is October 22. There is a 1-in-10 chance of frost by October 8, so tender plants are at risk from that point on.
- How long is the growing season in 62313?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 191 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.