Frost dates for 62870Odin, IL
The average last spring frost in Odin is April 9 and the average first fall frost is October 26, giving a typical growing season of about 197 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 9
- Average first fall frost
- Oct 26
- Growing season
- 197 days
Safer after Apr 23 (1-in-10 risk)
Possible by Oct 13 (1-in-10 risk)
Last frost typically in 160 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 7 · Apr 21 · May 6 | Oct 3 · Oct 17 · Oct 28 | 176 days | 100% |
| Frost / freeze (32°F) | Mar 25 · Apr 9 · Apr 23 | Oct 13 · Oct 26 · Nov 6 | 197 days | 100% |
| Hard freeze (28°F) | Mar 14 · Mar 30 · Apr 14 | Oct 23 · Nov 3 · Nov 20 | 219 days | 100% |
Planting calendar for Odin
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 9 – May 15 |
| Tomatoes | Transplant outdoors | Apr 25 – Jul 6 |
| Peppers | Start seeds indoors | Mar 9 – Apr 9 |
| Peppers | Transplant outdoors | May 9 – Jun 9 |
| Eggplant | Start seeds indoors | Mar 26 – Apr 24 |
| Eggplant | Transplant outdoors | May 9 – Jun 9 |
| Cucumbers | Sow outdoors | May 9 – Jul 16 |
| Summer squash | Sow outdoors | Apr 25 – Jun 9 |
| Winter squash & pumpkins | Sow outdoors | May 9 – Jun 9 |
| Snap beans | Sow outdoors | Apr 25 – Aug 8 |
| Sweet corn | Sow outdoors | Apr 25 – Jul 6 |
| Watermelon & cantaloupe | Sow outdoors | May 9 – Jun 9 |
| Okra | Sow outdoors | May 2 – May 25 |
| Peas | Sow outdoors (spring) | Mar 9 – Apr 24 |
| Potatoes | Plant outdoors (spring) | Mar 9 – May 9 |
| Onions | Start seeds indoors (spring) | Jan 26 – Feb 22 |
| Onions | Transplant outdoors (spring) | Mar 26 – Apr 24 |
| Broccoli | Start seeds indoors (spring) | Feb 19 – Mar 25 |
| Broccoli | Transplant outdoors (spring) | Mar 26 – Apr 24 |
| Broccoli | Start seeds indoors (fall) | Jun 26 – Jul 6 |
| Broccoli | Transplant outdoors (fall) | Jul 26 – Aug 6 |
| Cabbage | Start seeds indoors (spring) | Feb 9 – Mar 9 |
| Cabbage | Transplant outdoors (spring) | Mar 9 – Apr 9 |
| Cabbage | Start seeds indoors (fall) | Jun 16 – Jul 16 |
| Cabbage | Transplant outdoors (fall) | Jul 16 – Aug 16 |
| Leaf lettuce | Sow outdoors (spring) | Mar 9 – May 25 |
| Leaf lettuce | Sow outdoors (fall) | Jul 16 – Sep 1 |
| Spinach | Sow outdoors (spring) | Mar 2 – Apr 15 |
| Spinach | Sow outdoors (fall) | Aug 2 – Sep 6 |
| Radishes | Sow outdoors (spring) | Mar 9 – Apr 29 |
| Radishes | Sow outdoors (fall) | Jul 16 – Sep 16 |
| Kale | Sow outdoors (spring) | Mar 26 – Apr 15 |
| Kale | Sow outdoors (fall) | Jul 9 – Aug 16 |
| Carrots | Sow outdoors (spring) | Apr 9 – May 25 |
| Carrots | Sow outdoors (fall) | Jun 16 – Aug 1 |
| Garlic | Plant outdoors (fall) | Oct 16 – Nov 16 |
Where these dates come from
ZIP code 62870 is matched to the NOAA station Salem, IL, 10.1 km away, at 550 ft elevation (31 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Salem, IL (used) | 550 ft | Apr 9 | Oct 26 |
| Iuka 12 Sw, IL | 590 ft | Apr 9 | Oct 24 |
| Carlyle Rsvr, IL | 501 ft | Apr 6 | Oct 29 |
| Mt Vernon 3 Ne, IL | 490 ft | Apr 11 | Oct 22 |
Frost dates near Odin
- Sandoval, IL 62882 · last Apr 9, first Oct 26
- Salem, IL 62881 · last Apr 9, first Oct 26
- Centralia, IL 62801 · last Apr 9, first Oct 24
- Walnut Hill, IL 62893 · last Apr 9, first Oct 24
- Kell, IL 62853 · last Apr 9, first Oct 24
- Patoka, IL 62875 · last Apr 9, first Oct 26
- Alma, IL 62807 · last Apr 9, first Oct 26
- Hoffman, IL 62250 · last Apr 6, first Oct 29
Frequently asked questions
- When is the last frost in Odin, IL?
- For ZIP code 62870, the average last spring frost (32°F) is April 9, based on NOAA 1991-2020 climate normals for the Salem, IL weather station. There is a 1-in-10 chance of a frost after April 23.
- When is the first frost in Odin, IL?
- The average first fall frost (32°F) is October 26. There is a 1-in-10 chance of frost by October 13, so tender plants are at risk from that point on.
- How long is the growing season in 62870?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 197 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.