Frost dates for ZIP 61326 (Granville, IL)
Average last spring and first fall frost dates with 10%, 50% and 90% odds, from NOAA's 1991–2020 climate normals for the nearest weather station, Hennepin Wtr Trmt Plt, IL (6 miles away).
- Average last spring frostApr 2450% chance of a 32°F freeze after this date
- Average first fall frostOct 1750% chance of a 32°F freeze by this date
- Growing season (frost-free)174 daysmedian, 32°F threshold
- USDA hardiness zone5b-15 to -10°F avg. coldest night
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This week in your yard
As of Oct 17, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Soil temperature now
2-inch depth
54°F 50–55°F
24-hour average · latest 54°F, as of Oct 17, 9:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Shabbona 5 NNE (45 mi).
4-inch depth
55°F 55°F or warmer
24-hour average · latest 54°F, as of Oct 17, 9:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Shabbona 5 NNE (45 mi).
Fall: Texas A&M AgriLife times fall pre-emergent (for winter weeds such as annual bluegrass) to soil cooling to about 70°F for several days. The 50–55°F band is the spring trigger. Always read and follow the product label.
7-day forecast and frost risk
The latest National Weather Service 7-day forecast and any Frost Advisory or Freeze Warning for 61326 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 55°F at 4 inches (estimated soil temperature, not a station reading). Fall pre-emergent (annual bluegrass, winter weeds): window open as soil cools through the 70s and 60s.
Fertilizer window
Lawn region: North (cool-season). Timing only; always follow the product label.
- Kentucky bluegrass (cool-season): Early fall: Around Labor Day (late August–September); Late fall: Late October–November, before the ground freezes; Late spring: Optional around Memorial Day. Avoid: Early-spring and midsummer feeding (pushes top growth, favors crabgrass).
Plant now
No vegetable planting windows are open this week.
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Oct 17: skip heavy pruning in the 6–8 weeks before it, because new growth may not harden off in time.
Spring-flowering shrubs are pruned right after their flowers fade, not by date. See the pruning guide.
Last spring frost odds
| Chance of a 32°F freeze after this date | Date |
|---|---|
| 90% (early: most years still freeze after this) | Apr 11 |
| 50% (the "average" last frost) | Apr 24 |
| 10% (cautious: only 1 year in 10 freezes later) | May 10 |
Most gardeners plant frost-tender crops (tomatoes, peppers, basil) after the 50% date, and closer to the 10% date for less risk.
First fall frost odds
| Chance the first 32°F freeze has happened by this date | Date |
|---|---|
| 10% (early: 1 year in 10 freezes this soon) | Oct 1 |
| 50% (the "average" first frost) | Oct 17 |
| 90% (late: most years have frozen by now) | Oct 29 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | May 5 | Oct 7 |
| 32°F (freeze) | Apr 24 | Oct 17 |
| 28°F (hard freeze) | Apr 13 | Oct 27 |
n/a means NOAA did not publish a date at that threshold for this station (usually because it rarely gets that cold).
Vegetable planting calendar for 61326
Dates count from your average last spring frost (Apr 24) and first fall frost (Oct 17). Half of years have a frost after the spring date, so give tender crops (tomatoes, peppers, squash) some slack.
| Crop | Start indoors | Spring planting | Fall planting |
|---|---|---|---|
| Tomato | Feb 27–Mar 13 | May 1–15 (transplant) | – |
| Pepper (sweet and hot) | Feb 13–27 | May 8–22 (transplant) | – |
| Eggplant | Feb 13–27 | May 8–22 (transplant) | – |
| Tomatillo | Feb 27–Mar 13 | May 1–15 (transplant) | – |
| Lettuce | Feb 27–Mar 13 | Apr 3–24 (transplant) Mar 27–May 8 (sow outdoors) | Aug 22–Sep 12 (transplant) Aug 8–Sep 5 (sowing) |
| Spinach | – | Mar 13–Apr 3 (sow outdoors) | Aug 22–Sep 12 (sowing) |
| Kale | Feb 27–Mar 13 | Mar 27–Apr 10 (transplant) Mar 27–Apr 10 (sow outdoors) | Jul 25–Aug 22 (transplant) Jul 11–Aug 8 (sowing) |
| Collards | Feb 27–Mar 13 | Mar 27–Apr 24 (transplant) Mar 27–Apr 24 (sow outdoors) | Jul 25–Aug 22 (transplant) Jul 11–Aug 8 (sowing) |
| Broccoli | Feb 13–27 | Mar 27–Apr 10 (transplant) | Jul 11–Aug 8 (transplant) |
| Cabbage | Feb 13–27 | Mar 27–Apr 10 (transplant) | Jul 11–Aug 8 (transplant) |
| Cauliflower | Feb 13–27 | Apr 10–24 (transplant) | Jul 11–Aug 8 (transplant) |
| Brussels sprouts | Jan 30–Feb 13 | Mar 27–Apr 10 (transplant) | Jun 27–Jul 18 (transplant) |
| Kohlrabi | Feb 27–Mar 13 | Mar 27–Apr 10 (transplant) Mar 27–Apr 10 (sow outdoors) | Aug 8–22 (sowing) |
| Bok choy / Asian greens | – | Mar 27–Apr 10 (sow outdoors) | Aug 22–Sep 5 (sowing) |
| Arugula | – | Mar 27–Apr 24 (sow outdoors) | Aug 22–Sep 19 (sowing) |
| Mustard greens | – | Mar 27–Apr 17 (sow outdoors) | Aug 22–Sep 5 (sowing) |
| Swiss chard | Mar 13–27 | Apr 10–May 1 (transplant) Apr 10–May 8 (sow outdoors) | Aug 8–22 (sowing) |
| Beet | – | Mar 27–Apr 24 (sow outdoors) | Aug 8–22 (sowing) |
| Carrot | – | Apr 3–May 1 (sow outdoors) | Jul 25–Aug 8 (sowing) |
| Radish | – | Mar 20–May 1 (sow outdoors) | Sep 5–19 (sowing) |
| Turnip | – | Mar 27–Apr 17 (sow outdoors) | Aug 8–22 (sowing) |
| Parsnip | – | Apr 3–24 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 27–Mar 27 (sow outdoors) | Jul 25–Aug 8 (sowing) |
| Onion (bulbing) | Jan 30–Feb 13 | Mar 13–27 (transplant) | – |
| Green onion / scallion | – | Mar 13–Apr 10 (sow outdoors) | Aug 8–22 (sowing) |
| Leek | Jan 30–Feb 13 | Mar 27–Apr 10 (transplant) | – |
| Garlic | – | – | Sep 5–Oct 3 (sowing) |
| Shallot | – | Mar 13–27 (transplant) | Sep 5–Oct 3 (sowing) |
| Potato | – | Mar 27–Apr 10 (transplant) | Jun 27–Jul 11 (transplant) |
| Sweet potato | – | May 15–29 (transplant) | – |
| Sweet corn | – | May 1–15 (sow outdoors) | – |
| Bean, bush (snap) | – | May 1–15 (sow outdoors) | – |
| Bean, pole | – | May 1–15 (sow outdoors) | – |
| Lima bean | – | May 8–22 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | May 15–Jun 5 (sow outdoors) | – |
| Cucumber | Mar 27–Apr 3 | May 1–15 (transplant) May 1–15 (sow outdoors) | – |
| Summer squash / zucchini | Mar 27–Apr 3 | May 1–15 (transplant) May 1–15 (sow outdoors) | – |
| Winter squash | Mar 27–Apr 3 | May 1–15 (transplant) May 1–15 (sow outdoors) | – |
| Pumpkin | – | May 1–15 (sow outdoors) | – |
| Watermelon | Mar 27–Apr 3 | May 8–22 (transplant) May 8–22 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 27–Apr 3 | May 8–22 (transplant) May 8–22 (sow outdoors) | – |
| Okra | Mar 13–27 | May 8–22 (transplant) May 8–22 (sow outdoors) | – |
| Celery | Jan 30–Feb 13 | May 1–8 (transplant) | – |
| Basil | Mar 13–27 | May 1–15 (transplant) May 1–15 (sow outdoors) | – |
| Cilantro | – | Apr 10–May 8 (sow outdoors) | Aug 22–Sep 5 (sowing) |
| Parsley | Feb 13–27 | Apr 10–24 (transplant) Apr 3–24 (sow outdoors) | – |
| Dill | – | Apr 24–May 8 (sow outdoors) | Aug 22–Sep 5 (sowing) |
| Sunflower | – | Apr 24–May 8 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 27–Apr 10 (transplant) | – |
| Rhubarb (crowns) | – | Mar 27–Apr 10 (transplant) | – |
| Strawberry (plants) | – | Mar 27–Apr 10 (transplant) | Aug 8–Sep 5 (transplant) |
Typical ranges from university extension planting calendars, adjusted to your frost dates. Probabilities, not guarantees. Fall windows that would overlap spring planting are left out, as are fall crops of frost-tender plants where the frost-free season is under 210 days.
Where these numbers come from
Station: Hennepin Wtr Trmt Plt, IL (NOAA GHCN-Daily ID USC00114013), elevation 460 ft, 5.8 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Hennepin, IL | 6 mi | Apr 18 | Oct 22 |
| Peru, IL | 10 mi | Apr 24 | Oct 18 |
| Princeton, IL | 14 mi | Apr 22 | Oct 17 |
The average last-frost dates of these stations span 6 days, a rough guide to local variation. See data sources & methods.
Frost questions for 61326
When is the last frost in 61326?
The average (50% chance) last spring freeze of 32°F for ZIP 61326 is April 24. For a more cautious planting date, use May 10, when only 1 year in 10 still sees a later freeze.
When is the first frost in 61326?
The average first fall freeze is October 17. In 1 year in 10 it comes by October 1.
What hardiness zone is 61326?
ZIP 61326 is in USDA zone 5b (-15 to -10°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 61326 right now?
This page shows the latest 2-inch and 4-inch soil temperature from the nearest public soil station (USDA SCAN, NOAA USCRN or TexMesonet), or a labeled estimate when no station is close, against the 50–55°F spring pre-emergent band.
Nearby ZIP codes
61340 Mark 61363 Standard 61327 Hennepin 61316 Cedar Point 61335 McNabb 61322 De Pue 61362 Spring Valley 61354 Peru
Other ZIP codes in Putnam County
61327 61335 61336 61340 61363 61560 All Putnam County frost dates · Illinois frost dates
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