Frost dates for 52734Clinton, IA
The average last spring frost in Clinton is April 13 and the average first fall frost is October 26, giving a typical growing season of about 195 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 13
- Average first fall frost
- Oct 26
- Growing season
- 195 days
Safer after Apr 28 (1-in-10 risk)
Possible by Oct 13 (1-in-10 risk)
Last frost typically in 165 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 9 · Apr 24 · May 9 | Oct 1 · Oct 16 · Oct 28 | 174 days | 100% |
| Frost / freeze (32°F) | Apr 1 · Apr 13 · Apr 28 | Oct 13 · Oct 26 · Nov 7 | 195 days | 100% |
| Hard freeze (28°F) | Mar 19 · Apr 4 · Apr 18 | Oct 23 · Nov 3 · Nov 19 | 214 days | 100% |
Planting calendar for Clinton
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 6 |
| 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 16 |
| Summer squash | Sow outdoors | Apr 29 – Jun 13 |
| Winter squash & pumpkins | Sow outdoors | May 13 – Jun 13 |
| Snap beans | Sow outdoors | Apr 29 – Aug 8 |
| Sweet corn | Sow outdoors | Apr 29 – Jul 6 |
| 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 26 – Jul 6 |
| Broccoli | Transplant outdoors (fall) | Jul 26 – Aug 6 |
| Cabbage | Start seeds indoors (spring) | Feb 13 – Mar 13 |
| Cabbage | Transplant outdoors (spring) | Mar 13 – Apr 13 |
| Cabbage | Start seeds indoors (fall) | Jun 16 – Jul 16 |
| Cabbage | Transplant outdoors (fall) | Jul 16 – Aug 16 |
| Leaf lettuce | Sow outdoors (spring) | Mar 13 – May 29 |
| Leaf lettuce | Sow outdoors (fall) | Jul 16 – Sep 1 |
| Spinach | Sow outdoors (spring) | Mar 6 – Apr 19 |
| Spinach | Sow outdoors (fall) | Aug 2 – Sep 6 |
| Radishes | Sow outdoors (spring) | Mar 13 – May 3 |
| Radishes | Sow outdoors (fall) | Jul 16 – Sep 16 |
| Kale | Sow outdoors (spring) | Mar 30 – Apr 19 |
| Kale | Sow outdoors (fall) | Jul 9 – Aug 16 |
| Carrots | Sow outdoors (spring) | Apr 13 – May 29 |
| Carrots | Sow outdoors (fall) | Jun 16 – Aug 1 |
| Garlic | Plant outdoors (fall) | Oct 16 – Nov 16 |
Where these dates come from
ZIP code 52734 is matched to the NOAA station Fulton L&D #13, IL, 6.6 km away, at 592 ft elevation (1 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Fulton L&D #13, IL (used) | 592 ft | Apr 13 | Oct 26 |
| Clinton #1, IA | 585 ft | Apr 22 | Oct 16 |
| Morrison, IL | 632 ft | Apr 26 | Oct 13 |
| Mt Carroll, IL | 640 ft | May 2 | Oct 7 |
Frost dates near Clinton
- Clinton, IA 52733 · last Apr 13, first Oct 26
- Fulton, IL 61252 · last Apr 13, first Oct 26
- Albany, IL 61230 · last Apr 22, first Oct 16
- Camanche, IA 52730 · last Apr 22, first Oct 16
- Low Moor, IA 52757 · last Apr 22, first Oct 16
- Andover, IA 52701 · last Apr 13, first Oct 26
- Teeds Grove, IA 52771 · last Apr 13, first Oct 26
- Fenton, IL 61251 · last Apr 26, first Oct 13
Frequently asked questions
- When is the last frost in Clinton, IA?
- For ZIP code 52734, the average last spring frost (32°F) is April 13, based on NOAA 1991-2020 climate normals for the Fulton L&D #13, IL weather station. There is a 1-in-10 chance of a frost after April 28.
- When is the first frost in Clinton, IA?
- 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 52734?
- 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.