Frost dates for 62915Cambria, IL
The average last spring frost in Cambria is April 9 and the average first fall frost is October 22, giving a typical growing season of about 195 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 9
- Average first fall frost
- Oct 22
- Growing season
- 195 days
Safer after Apr 25 (1-in-10 risk)
Possible by Oct 10 (1-in-10 risk)
Last frost typically in 162 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 5 · Apr 22 · May 5 | Sep 30 · Oct 13 · Oct 25 | 173 days | 100% |
| Frost / freeze (32°F) | Mar 25 · Apr 9 · Apr 25 | Oct 10 · Oct 22 · Nov 2 | 195 days | 100% |
| Hard freeze (28°F) | Mar 11 · Mar 29 · Apr 14 | Oct 19 · Nov 1 · Nov 18 | 216 days | 100% |
Planting calendar for Cambria
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 2 |
| 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 12 |
| Summer squash | Sow outdoors | Apr 25 – Jun 9 |
| Winter squash & pumpkins | Sow outdoors | May 9 – Jun 9 |
| Snap beans | Sow outdoors | Apr 25 – Aug 4 |
| Sweet corn | Sow outdoors | Apr 25 – Jul 2 |
| 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 22 – Jul 2 |
| Broccoli | Transplant outdoors (fall) | Jul 22 – Aug 2 |
| Cabbage | Start seeds indoors (spring) | Feb 9 – Mar 9 |
| Cabbage | Transplant outdoors (spring) | Mar 9 – Apr 9 |
| Cabbage | Start seeds indoors (fall) | Jun 12 – Jul 12 |
| Cabbage | Transplant outdoors (fall) | Jul 12 – Aug 12 |
| Leaf lettuce | Sow outdoors (spring) | Mar 9 – May 25 |
| Leaf lettuce | Sow outdoors (fall) | Jul 12 – Aug 28 |
| Spinach | Sow outdoors (spring) | Mar 2 – Apr 15 |
| Spinach | Sow outdoors (fall) | Jul 29 – Sep 2 |
| Radishes | Sow outdoors (spring) | Mar 9 – Apr 29 |
| Radishes | Sow outdoors (fall) | Jul 12 – Sep 12 |
| Kale | Sow outdoors (spring) | Mar 26 – Apr 15 |
| Kale | Sow outdoors (fall) | Jul 5 – Aug 12 |
| Carrots | Sow outdoors (spring) | Apr 9 – May 25 |
| Carrots | Sow outdoors (fall) | Jun 12 – Jul 28 |
| Garlic | Plant outdoors (fall) | Oct 12 – Nov 12 |
Where these dates come from
ZIP code 62915 is matched to the NOAA station Carbondale Sewage Plt, IL, 7 km away, at 390 ft elevation (36 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Carbondale Sewage Plt, IL (used) | 390 ft | Apr 9 | Oct 22 |
| Carbondale Southern Il Ap, IL | 406 ft | Apr 9 | Oct 22 |
| Du Quoin 4 Se, IL | 420 ft | Apr 6 | Oct 22 |
| Rend Lake Dam, IL | 455 ft | Apr 4 | Oct 27 |
Frost dates near Cambria
- Carterville, IL 62918 · last Apr 9, first Oct 22
- Colp, IL 62921 · last Apr 9, first Oct 22
- Hurst, IL 62949 · last Apr 9, first Oct 22
- Energy, IL 62933 · last Apr 9, first Oct 22
- Herrin, IL 62948 · last Apr 9, first Oct 22
- De Soto, IL 62924 · last Apr 9, first Oct 22
- Royalton, IL 62983 · last Apr 6, first Oct 22
- Carbondale, IL 62901 · last Apr 9, first Oct 22
Frequently asked questions
- When is the last frost in Cambria, IL?
- For ZIP code 62915, the average last spring frost (32°F) is April 9, based on NOAA 1991-2020 climate normals for the Carbondale Sewage Plt, IL weather station. There is a 1-in-10 chance of a frost after April 25.
- When is the first frost in Cambria, IL?
- The average first fall frost (32°F) is October 22. There is a 1-in-10 chance of frost by October 10, so tender plants are at risk from that point on.
- How long is the growing season in 62915?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 195 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.