Hayward, WI frost dates
Last spring frostMay 23median date
First fall frostSep 22median date
Growing season122 daysfrost-free
Hardiness zone4aZone 4a
How Hayward compares
- In 8 years out of 10, the last spring frost in Hayward falls between May 5 and June 6, a 32-day window. The first fall frost falls between September 5 and October 6.
- The median last frost is 18 days later than the Wisconsin median of May 5.
- Its 122-day growing season is among the shortest of the 749 Wisconsin places with a regular frost season.
- The last frost is 11 days later than the zone 4a median of May 12. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 4a chart.
- The weather station records an average of 188 nights a year at or below 32°F.
- Compared with Duluth, MN, 113 km away, the last frost here is 9 days later than there and the growing season is 29 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 5 |
| 50% (median) | May 23 |
| 10% (safe for tender plants) | June 6 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 5 |
| 50% (median) | September 22 |
| 90% (late) | October 6 |
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 Hayward, WI
Hayward, WI frost dates — last frost May 23, first frost Sep 22, zone 4a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Feb 28 to Mar 14Transplant outside: Apr 25 to May 9
Start indoors: Mar 14 to Mar 28Transplant outside: Jun 6 to Jun 20
Start indoors: Mar 14 to Mar 28Transplant outside: Jun 6 to Jun 20
Start indoors: Mar 28 to Apr 11Transplant outside: May 30 to Jun 13
Start indoors: Mar 28 to Apr 11Transplant outside: May 2 to May 16Sow outdoors: Apr 25 to May 30Plant for fall: Jul 28 to Aug 25
Start indoors: Mar 28 to Apr 11Transplant outside: Apr 25 to May 9Sow outdoors: Apr 25 to May 9Plant for fall: Jul 14 to Aug 4
Start indoors: Mar 28 to Apr 11Transplant outside: May 9 to May 23Plant for fall: Jun 16 to Jul 7
Start indoors: Mar 28 to Apr 11Transplant outside: May 2 to May 16Plant for fall: Jun 16 to Jul 7
Start indoors: Mar 28 to Apr 11Transplant outside: May 9 to May 23Plant for fall: Jun 16 to Jul 7
Start indoors: Apr 11 to Apr 25Transplant outside: Jun 13 to Jun 27Sow outdoors: Jun 13 to Jun 27
Start indoors: Apr 11 to Apr 25Transplant outside: May 30 to Jun 13
Sow outdoors: Apr 11 to May 2Plant for fall: Jun 30 to Jul 21
Sow outdoors: Apr 11 to May 2Plant for fall: Jul 28 to Aug 18
Sow outdoors: Apr 18 to May 30Plant for fall: Aug 11 to Sep 1
Start indoors: Apr 25 to May 2Transplant outside: Jun 6 to Jun 13Sow outdoors: May 30 to Jun 13Plant for fall: Jul 7 to Jul 21
Start indoors: Apr 25 to May 2Sow outdoors: May 30 to Jun 13Plant for fall: Jul 14 to Jul 28
Start indoors: Apr 25 to May 2Sow outdoors: May 30 to Jun 13
Start indoors: Apr 25 to May 2Transplant outside: Jun 6 to Jun 20
Sow outdoors: May 2 to May 30Plant for fall: Jun 30 to Jul 14
Sow outdoors: May 2 to May 30Plant for fall: Jul 14 to Jul 28
Sow outdoors: May 2 to May 23
Sow outdoors: May 9 to Jun 6Plant for fall: Jul 14 to Jul 28
Sow outdoors: May 9 to May 30Plant for fall: Jul 28 to Aug 18
Sow outdoors: May 30 to Jun 20Plant for fall: Jul 7 to Jul 21
Sow outdoors: May 30 to Jun 13
Transplant outside: Jun 6 to Jun 27
Plant for fall: Sep 8 to Oct 13
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Hayward, WI
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 28 – Mar 14 | Apr 25 – May 9 | — | — |
| Peppers | Mar 14 – Mar 28 | Jun 6 – Jun 20 | — | — |
| Eggplant | Mar 14 – Mar 28 | Jun 6 – Jun 20 | — | — |
| Tomatoes | Mar 28 – Apr 11 | May 30 – Jun 13 | — | — |
| Lettuce | Mar 28 – Apr 11 | May 2 – May 16 | Apr 25 – May 30 | Jul 28 – Aug 25 |
| Kale | Mar 28 – Apr 11 | Apr 25 – May 9 | Apr 25 – May 9 | Jul 14 – Aug 4 |
| Broccoli | Mar 28 – Apr 11 | May 9 – May 23 | — | Jun 16 – Jul 7 |
| Cabbage | Mar 28 – Apr 11 | May 2 – May 16 | — | Jun 16 – Jul 7 |
| Cauliflower | Mar 28 – Apr 11 | May 9 – May 23 | — | Jun 16 – Jul 7 |
| Okra | Apr 11 – Apr 25 | Jun 13 – Jun 27 | Jun 13 – Jun 27 | — |
| Basil | Apr 11 – Apr 25 | May 30 – Jun 13 | — | — |
| Peas | — | — | Apr 11 – May 2 | Jun 30 – Jul 21 |
| Spinach | — | — | Apr 11 – May 2 | Jul 28 – Aug 18 |
| Radishes | — | — | Apr 18 – May 30 | Aug 11 – Sep 1 |
| Cucumbers | Apr 25 – May 2 | Jun 6 – Jun 13 | May 30 – Jun 13 | Jul 7 – Jul 21 |
| Zucchini & Summer Squash | Apr 25 – May 2 | — | May 30 – Jun 13 | Jul 14 – Jul 28 |
| Winter Squash & Pumpkins | Apr 25 – May 2 | — | May 30 – Jun 13 | — |
| Melons & Watermelon | Apr 25 – May 2 | Jun 6 – Jun 20 | — | — |
| Carrots | — | — | May 2 – May 30 | Jun 30 – Jul 14 |
| Beets | — | — | May 2 – May 30 | Jul 14 – Jul 28 |
| Potatoes | — | — | May 2 – May 23 | — |
| Swiss Chard | — | — | May 9 – Jun 6 | Jul 14 – Jul 28 |
| Cilantro | — | — | May 9 – May 30 | Jul 28 – Aug 18 |
| Green Beans | — | — | May 30 – Jun 20 | Jul 7 – Jul 21 |
| Sweet Corn | — | — | May 30 – Jun 13 | — |
| Sweet Potatoes | — | Jun 6 – Jun 27 | — | — |
| Garlic | — | — | — | Sep 8 – Oct 13 |
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 Hayward Muni Ap, WI weather station, 15 km away (elevation 1,204 ft (367 m)).
Frost dates near Hayward
- Couderay frost any month
- Radisson May 19 · Sep 27
- Stone Lake frost any month
- Ojibwa May 19 · Sep 27
- Winter May 19 · Sep 27
- Edgewater frost any month
- Cable May 20 · Oct 1
- Springbrook May 22 · Sep 23
- Exeland May 19 · Sep 27
- Clam Lake May 16 · Sep 30
Frequently asked questions
When is the last frost in Hayward, WI?
The median last spring frost in Hayward, WI is May 23. There is still about a 10% chance of frost after June 6, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Hayward, WI?
The median first fall frost is September 22, with about a 10% chance of frost before September 5.
How long is the growing season in Hayward, WI?
About 122 days between the median last spring frost and first fall frost.
What planting zone is Hayward, WI?
Hayward, WI is in USDA hardiness zone 4a.