Kamiah, ID frost dates
Last spring frostApr 29median date
First fall frostOct 5median date
Growing season159 daysfrost-free
Hardiness zone7aZone 7a
How Kamiah compares
- In 8 years out of 10, the last spring frost in Kamiah falls between April 9 and May 12, a 33-day window. The first fall frost falls between September 22 and October 24.
- The median last frost is 15 days earlier than the Idaho median of May 14.
- Its 159-day growing season is longer than 79% of the 244 Idaho places with a regular frost season (state median 138 days).
- The last frost is 13 days later than the zone 7a median of Apr 16. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 7a chart.
- The weather station records an average of 120 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 9 |
| 50% (median) | April 29 |
| 10% (safe for tender plants) | May 12 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 22 |
| 50% (median) | October 5 |
| 90% (late) | October 24 |
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 Kamiah, ID
Kamiah, ID frost dates — last frost Apr 29, first frost Oct 5, zone 7a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Feb 4 to Feb 18Transplant outside: Apr 1 to Apr 15
Start indoors: Feb 18 to Mar 4Transplant outside: May 13 to May 27
Start indoors: Feb 18 to Mar 4Transplant outside: May 13 to May 27
Start indoors: Mar 4 to Mar 18Transplant outside: May 6 to May 20
Start indoors: Mar 4 to Mar 18Transplant outside: Apr 8 to Apr 22Sow outdoors: Apr 1 to May 6Plant for fall: Aug 10 to Sep 7
Start indoors: Mar 4 to Mar 18Transplant outside: Apr 1 to Apr 15Sow outdoors: Apr 1 to Apr 15Plant for fall: Jul 27 to Aug 17
Start indoors: Mar 4 to Mar 18Transplant outside: Apr 15 to Apr 29Plant for fall: Jun 29 to Jul 20
Start indoors: Mar 4 to Mar 18Transplant outside: Apr 8 to Apr 22Plant for fall: Jun 29 to Jul 20
Start indoors: Mar 4 to Mar 18Transplant outside: Apr 15 to Apr 29Plant for fall: Jun 29 to Jul 20
Start indoors: Mar 18 to Apr 1Transplant outside: May 20 to Jun 3Sow outdoors: May 20 to Jun 3
Start indoors: Mar 18 to Apr 1Transplant outside: May 6 to May 20
Sow outdoors: Mar 18 to Apr 8Plant for fall: Jul 13 to Aug 3
Sow outdoors: Mar 18 to Apr 8Plant for fall: Aug 10 to Aug 31
Sow outdoors: Mar 25 to May 6Plant for fall: Aug 24 to Sep 14
Start indoors: Apr 1 to Apr 8Transplant outside: May 13 to May 20Sow outdoors: May 6 to May 20Plant for fall: Jul 20 to Aug 3
Start indoors: Apr 1 to Apr 8Sow outdoors: May 6 to May 20Plant for fall: Jul 27 to Aug 10
Start indoors: Apr 1 to Apr 8Sow outdoors: May 6 to May 20
Start indoors: Apr 1 to Apr 8Transplant outside: May 13 to May 27
Sow outdoors: Apr 8 to May 6Plant for fall: Jul 13 to Jul 27
Sow outdoors: Apr 8 to May 6Plant for fall: Jul 27 to Aug 10
Sow outdoors: Apr 8 to Apr 29
Sow outdoors: Apr 15 to May 13Plant for fall: Jul 27 to Aug 10
Sow outdoors: Apr 15 to May 6Plant for fall: Aug 10 to Aug 31
Sow outdoors: May 6 to May 27Plant for fall: Jul 20 to Aug 3
Sow outdoors: May 6 to May 20
Transplant outside: May 13 to Jun 3
Plant for fall: Sep 21 to Oct 26
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Kamiah, ID
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 4 – Feb 18 | Apr 1 – Apr 15 | — | — |
| Peppers | Feb 18 – Mar 4 | May 13 – May 27 | — | — |
| Eggplant | Feb 18 – Mar 4 | May 13 – May 27 | — | — |
| Tomatoes | Mar 4 – Mar 18 | May 6 – May 20 | — | — |
| Lettuce | Mar 4 – Mar 18 | Apr 8 – Apr 22 | Apr 1 – May 6 | Aug 10 – Sep 7 |
| Kale | Mar 4 – Mar 18 | Apr 1 – Apr 15 | Apr 1 – Apr 15 | Jul 27 – Aug 17 |
| Broccoli | Mar 4 – Mar 18 | Apr 15 – Apr 29 | — | Jun 29 – Jul 20 |
| Cabbage | Mar 4 – Mar 18 | Apr 8 – Apr 22 | — | Jun 29 – Jul 20 |
| Cauliflower | Mar 4 – Mar 18 | Apr 15 – Apr 29 | — | Jun 29 – Jul 20 |
| Okra | Mar 18 – Apr 1 | May 20 – Jun 3 | May 20 – Jun 3 | — |
| Basil | Mar 18 – Apr 1 | May 6 – May 20 | — | — |
| Peas | — | — | Mar 18 – Apr 8 | Jul 13 – Aug 3 |
| Spinach | — | — | Mar 18 – Apr 8 | Aug 10 – Aug 31 |
| Radishes | — | — | Mar 25 – May 6 | Aug 24 – Sep 14 |
| Cucumbers | Apr 1 – Apr 8 | May 13 – May 20 | May 6 – May 20 | Jul 20 – Aug 3 |
| Zucchini & Summer Squash | Apr 1 – Apr 8 | — | May 6 – May 20 | Jul 27 – Aug 10 |
| Winter Squash & Pumpkins | Apr 1 – Apr 8 | — | May 6 – May 20 | — |
| Melons & Watermelon | Apr 1 – Apr 8 | May 13 – May 27 | — | — |
| Carrots | — | — | Apr 8 – May 6 | Jul 13 – Jul 27 |
| Beets | — | — | Apr 8 – May 6 | Jul 27 – Aug 10 |
| Potatoes | — | — | Apr 8 – Apr 29 | — |
| Swiss Chard | — | — | Apr 15 – May 13 | Jul 27 – Aug 10 |
| Cilantro | — | — | Apr 15 – May 6 | Aug 10 – Aug 31 |
| Green Beans | — | — | May 6 – May 27 | Jul 20 – Aug 3 |
| Sweet Corn | — | — | May 6 – May 20 | — |
| Sweet Potatoes | — | May 13 – Jun 3 | — | — |
| Garlic | — | — | — | Sep 21 – Oct 26 |
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 Kamiah, ID weather station, about 1 km away (elevation 1,211 ft (369 m)).
Frost dates near Kamiah
- Kooskia Apr 30 · Oct 11
- Nezperce May 24 · Sep 20
- Weippe Jun 3 · Sep 7
- Greencreek May 6 · Oct 13
- Stites Apr 30 · Oct 11
- Ferdinand May 6 · Oct 13
- Cottonwood May 6 · Oct 13
- Grangeville May 9 · Oct 3
- Fenn May 9 · Oct 3
- Craigmont May 23 · Sep 25
Frequently asked questions
When is the last frost in Kamiah, ID?
The median last spring frost in Kamiah, ID is April 29. There is still about a 10% chance of frost after May 12, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Kamiah, ID?
The median first fall frost is October 5, with about a 10% chance of frost before September 22.
How long is the growing season in Kamiah, ID?
About 159 days between the median last spring frost and first fall frost.
What planting zone is Kamiah, ID?
Kamiah, ID is in USDA hardiness zone 7a.