Humeston, IA frost dates
Last spring frostApr 30median date
First fall frostOct 8median date
Growing season161 daysfrost-free
Hardiness zone5bZone 5b
How Humeston compares
- In 8 years out of 10, the last spring frost in Humeston falls between April 16 and May 15, a 29-day window. The first fall frost falls between September 26 and October 22.
- The median last frost is 2 days later than the Iowa median of Apr 28.
- Its 161-day growing season is longer than 28% of the 934 Iowa places with a regular frost season (state median 165 days).
- The last frost is typical for zone 5b, where the median is May 1.
- The weather station records an average of 150 nights a year at or below 32°F.
- Compared with West Des Moines, IA, 84 km away, the last frost here is 12 days later than there and the growing season is 24 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 16 |
| 50% (median) | April 30 |
| 10% (safe for tender plants) | May 15 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 26 |
| 50% (median) | October 8 |
| 90% (late) | October 22 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Humeston, IA
Humeston, IA frost dates — last frost Apr 30, first frost Oct 8, zone 5b. whenisthelastfrost.com
Crop
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Start indoors: Feb 5 to Feb 19Transplant outside: Apr 2 to Apr 16
Start indoors: Feb 19 to Mar 5Transplant outside: May 14 to May 28
Start indoors: Feb 19 to Mar 5Transplant outside: May 14 to May 28
Start indoors: Mar 5 to Mar 19Transplant outside: May 7 to May 21
Start indoors: Mar 5 to Mar 19Transplant outside: Apr 9 to Apr 23Sow outdoors: Apr 2 to May 7Plant for fall: Aug 13 to Sep 10
Start indoors: Mar 5 to Mar 19Transplant outside: Apr 2 to Apr 16Sow outdoors: Apr 2 to Apr 16Plant for fall: Jul 30 to Aug 20
Start indoors: Mar 5 to Mar 19Transplant outside: Apr 16 to Apr 30Plant for fall: Jul 2 to Jul 23
Start indoors: Mar 5 to Mar 19Transplant outside: Apr 9 to Apr 23Plant for fall: Jul 2 to Jul 23
Start indoors: Mar 5 to Mar 19Transplant outside: Apr 16 to Apr 30Plant for fall: Jul 2 to Jul 23
Start indoors: Mar 19 to Apr 2Transplant outside: May 21 to Jun 4Sow outdoors: May 21 to Jun 4
Start indoors: Mar 19 to Apr 2Transplant outside: May 7 to May 21
Sow outdoors: Mar 19 to Apr 9Plant for fall: Jul 16 to Aug 6
Sow outdoors: Mar 19 to Apr 9Plant for fall: Aug 13 to Sep 3
Sow outdoors: Mar 26 to May 7Plant for fall: Aug 27 to Sep 17
Start indoors: Apr 2 to Apr 9Transplant outside: May 14 to May 21Sow outdoors: May 7 to May 21Plant for fall: Jul 23 to Aug 6
Start indoors: Apr 2 to Apr 9Sow outdoors: May 7 to May 21Plant for fall: Jul 30 to Aug 13
Start indoors: Apr 2 to Apr 9Sow outdoors: May 7 to May 21
Start indoors: Apr 2 to Apr 9Transplant outside: May 14 to May 28
Sow outdoors: Apr 9 to May 7Plant for fall: Jul 16 to Jul 30
Sow outdoors: Apr 9 to May 7Plant for fall: Jul 30 to Aug 13
Sow outdoors: Apr 9 to Apr 30
Sow outdoors: Apr 16 to May 14Plant for fall: Jul 30 to Aug 13
Sow outdoors: Apr 16 to May 7Plant for fall: Aug 13 to Sep 3
Sow outdoors: May 7 to May 28Plant for fall: Jul 23 to Aug 6
Sow outdoors: May 7 to May 21
Transplant outside: May 14 to Jun 4
Plant for fall: Sep 24 to Oct 29
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Humeston, IA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 5 – Feb 19 | Apr 2 – Apr 16 | — | — |
| Peppers | Feb 19 – Mar 5 | May 14 – May 28 | — | — |
| Eggplant | Feb 19 – Mar 5 | May 14 – May 28 | — | — |
| Tomatoes | Mar 5 – Mar 19 | May 7 – May 21 | — | — |
| Lettuce | Mar 5 – Mar 19 | Apr 9 – Apr 23 | Apr 2 – May 7 | Aug 13 – Sep 10 |
| Kale | Mar 5 – Mar 19 | Apr 2 – Apr 16 | Apr 2 – Apr 16 | Jul 30 – Aug 20 |
| Broccoli | Mar 5 – Mar 19 | Apr 16 – Apr 30 | — | Jul 2 – Jul 23 |
| Cabbage | Mar 5 – Mar 19 | Apr 9 – Apr 23 | — | Jul 2 – Jul 23 |
| Cauliflower | Mar 5 – Mar 19 | Apr 16 – Apr 30 | — | Jul 2 – Jul 23 |
| Okra | Mar 19 – Apr 2 | May 21 – Jun 4 | May 21 – Jun 4 | — |
| Basil | Mar 19 – Apr 2 | May 7 – May 21 | — | — |
| Peas | — | — | Mar 19 – Apr 9 | Jul 16 – Aug 6 |
| Spinach | — | — | Mar 19 – Apr 9 | Aug 13 – Sep 3 |
| Radishes | — | — | Mar 26 – May 7 | Aug 27 – Sep 17 |
| Cucumbers | Apr 2 – Apr 9 | May 14 – May 21 | May 7 – May 21 | Jul 23 – Aug 6 |
| Zucchini & Summer Squash | Apr 2 – Apr 9 | — | May 7 – May 21 | Jul 30 – Aug 13 |
| Winter Squash & Pumpkins | Apr 2 – Apr 9 | — | May 7 – May 21 | — |
| Melons & Watermelon | Apr 2 – Apr 9 | May 14 – May 28 | — | — |
| Carrots | — | — | Apr 9 – May 7 | Jul 16 – Jul 30 |
| Beets | — | — | Apr 9 – May 7 | Jul 30 – Aug 13 |
| Potatoes | — | — | Apr 9 – Apr 30 | — |
| Swiss Chard | — | — | Apr 16 – May 14 | Jul 30 – Aug 13 |
| Cilantro | — | — | Apr 16 – May 7 | Aug 13 – Sep 3 |
| Green Beans | — | — | May 7 – May 28 | Jul 23 – Aug 6 |
| Sweet Corn | — | — | May 7 – May 21 | — |
| Sweet Potatoes | — | May 14 – Jun 4 | — | — |
| Garlic | — | — | — | Sep 24 – Oct 29 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Leon 6 Ese, IA weather station, 18 km away (elevation 1,001 ft (305 m)).
Frost dates near Humeston
- Derby May 5 · Oct 5
- Garden Grove Apr 30 · Oct 8
- Millerton Apr 21 · Oct 19
- Corydon Apr 21 · Oct 19
- Woodburn Apr 29 · Oct 9
- Weldon Apr 29 · Oct 9
- Allerton Apr 21 · Oct 19
- Leon Apr 30 · Oct 8
- Lucas May 5 · Oct 5
- Clio Apr 21 · Oct 19
Frequently asked questions
When is the last frost in Humeston, IA?
The median last spring frost in Humeston, IA is April 30. There is still about a 10% chance of frost after May 15, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Humeston, IA?
The median first fall frost is October 8, with about a 10% chance of frost before September 26.
How long is the growing season in Humeston, IA?
About 161 days between the median last spring frost and first fall frost.
What planting zone is Humeston, IA?
Humeston, IA is in USDA hardiness zone 5b.