Weiser, ID frost dates
Last spring frostApr 23median date
First fall frostOct 13median date
Growing season173 daysfrost-free
Hardiness zone7aZone 7a
How Weiser compares
- In 8 years out of 10, the last spring frost in Weiser falls between April 3 and May 10, a 37-day window. The first fall frost falls between October 1 and October 27.
- The median last frost is 21 days earlier than the Idaho median of May 14.
- Its 173-day growing season is longer than 90% of the 244 Idaho places with a regular frost season (state median 138 days).
- The last frost is 7 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 136 nights a year at or below 32°F.
- Compared with Caldwell, ID, 67 km away, the last frost here is the same as there and the growing season is 5 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 3 |
| 50% (median) | April 23 |
| 10% (safe for tender plants) | May 10 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 1 |
| 50% (median) | October 13 |
| 90% (late) | October 27 |
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 Weiser, ID
Weiser, ID frost dates — last frost Apr 23, first frost Oct 13, zone 7a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Jan 29 to Feb 12Transplant outside: Mar 26 to Apr 9
Start indoors: Feb 12 to Feb 26Transplant outside: May 7 to May 21
Start indoors: Feb 12 to Feb 26Transplant outside: May 7 to May 21
Start indoors: Feb 26 to Mar 12Transplant outside: Apr 30 to May 14
Start indoors: Feb 26 to Mar 12Transplant outside: Apr 2 to Apr 16Sow outdoors: Mar 26 to Apr 30Plant for fall: Aug 18 to Sep 15
Start indoors: Feb 26 to Mar 12Transplant outside: Mar 26 to Apr 9Sow outdoors: Mar 26 to Apr 9Plant for fall: Aug 4 to Aug 25
Start indoors: Feb 26 to Mar 12Transplant outside: Apr 9 to Apr 23Plant for fall: Jul 7 to Jul 28
Start indoors: Feb 26 to Mar 12Transplant outside: Apr 2 to Apr 16Plant for fall: Jul 7 to Jul 28
Start indoors: Feb 26 to Mar 12Transplant outside: Apr 9 to Apr 23Plant for fall: Jul 7 to Jul 28
Start indoors: Mar 12 to Mar 26Transplant outside: May 14 to May 28Sow outdoors: May 14 to May 28
Start indoors: Mar 12 to Mar 26Transplant outside: Apr 30 to May 14
Sow outdoors: Mar 12 to Apr 2Plant for fall: Jul 21 to Aug 11
Sow outdoors: Mar 12 to Apr 2Plant for fall: Aug 18 to Sep 8
Sow outdoors: Mar 19 to Apr 30Plant for fall: Sep 1 to Sep 22
Start indoors: Mar 26 to Apr 2Transplant outside: May 7 to May 14Sow outdoors: Apr 30 to May 14Plant for fall: Jul 28 to Aug 11
Start indoors: Mar 26 to Apr 2Sow outdoors: Apr 30 to May 14Plant for fall: Aug 4 to Aug 18
Start indoors: Mar 26 to Apr 2Sow outdoors: Apr 30 to May 14
Start indoors: Mar 26 to Apr 2Transplant outside: May 7 to May 21
Sow outdoors: Apr 2 to Apr 30Plant for fall: Jul 21 to Aug 4
Sow outdoors: Apr 2 to Apr 30Plant for fall: Aug 4 to Aug 18
Sow outdoors: Apr 2 to Apr 23
Sow outdoors: Apr 9 to May 7Plant for fall: Aug 4 to Aug 18
Sow outdoors: Apr 9 to Apr 30Plant for fall: Aug 18 to Sep 8
Sow outdoors: Apr 30 to May 21Plant for fall: Jul 28 to Aug 11
Sow outdoors: Apr 30 to May 14
Transplant outside: May 7 to May 28
Plant for fall: Sep 29 to Nov 3
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Weiser, ID
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 29 – Feb 12 | Mar 26 – Apr 9 | — | — |
| Peppers | Feb 12 – Feb 26 | May 7 – May 21 | — | — |
| Eggplant | Feb 12 – Feb 26 | May 7 – May 21 | — | — |
| Tomatoes | Feb 26 – Mar 12 | Apr 30 – May 14 | — | — |
| Lettuce | Feb 26 – Mar 12 | Apr 2 – Apr 16 | Mar 26 – Apr 30 | Aug 18 – Sep 15 |
| Kale | Feb 26 – Mar 12 | Mar 26 – Apr 9 | Mar 26 – Apr 9 | Aug 4 – Aug 25 |
| Broccoli | Feb 26 – Mar 12 | Apr 9 – Apr 23 | — | Jul 7 – Jul 28 |
| Cabbage | Feb 26 – Mar 12 | Apr 2 – Apr 16 | — | Jul 7 – Jul 28 |
| Cauliflower | Feb 26 – Mar 12 | Apr 9 – Apr 23 | — | Jul 7 – Jul 28 |
| Okra | Mar 12 – Mar 26 | May 14 – May 28 | May 14 – May 28 | — |
| Basil | Mar 12 – Mar 26 | Apr 30 – May 14 | — | — |
| Peas | — | — | Mar 12 – Apr 2 | Jul 21 – Aug 11 |
| Spinach | — | — | Mar 12 – Apr 2 | Aug 18 – Sep 8 |
| Radishes | — | — | Mar 19 – Apr 30 | Sep 1 – Sep 22 |
| Cucumbers | Mar 26 – Apr 2 | May 7 – May 14 | Apr 30 – May 14 | Jul 28 – Aug 11 |
| Zucchini & Summer Squash | Mar 26 – Apr 2 | — | Apr 30 – May 14 | Aug 4 – Aug 18 |
| Winter Squash & Pumpkins | Mar 26 – Apr 2 | — | Apr 30 – May 14 | — |
| Melons & Watermelon | Mar 26 – Apr 2 | May 7 – May 21 | — | — |
| Carrots | — | — | Apr 2 – Apr 30 | Jul 21 – Aug 4 |
| Beets | — | — | Apr 2 – Apr 30 | Aug 4 – Aug 18 |
| Potatoes | — | — | Apr 2 – Apr 23 | — |
| Swiss Chard | — | — | Apr 9 – May 7 | Aug 4 – Aug 18 |
| Cilantro | — | — | Apr 9 – Apr 30 | Aug 18 – Sep 8 |
| Green Beans | — | — | Apr 30 – May 21 | Jul 28 – Aug 11 |
| Sweet Corn | — | — | Apr 30 – May 14 | — |
| Sweet Potatoes | — | May 7 – May 28 | — | — |
| Garlic | — | — | — | Sep 29 – Nov 3 |
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 Weiser, ID weather station, about 1 km away (elevation 2,119 ft (646 m)).
Frost dates near Weiser
- Payette Apr 19 · Oct 20
- Fruitland Apr 22 · Oct 9
- Midvale May 15 · Sep 27
- New Plymouth Apr 22 · Oct 9
- Cambridge May 15 · Sep 27
- Letha Apr 30 · Oct 17
- Parma Apr 27 · Oct 9
- Indian Valley May 15 · Sep 27
- Emmett Apr 30 · Oct 17
- Ola May 31 · Sep 16
Frequently asked questions
When is the last frost in Weiser, ID?
The median last spring frost in Weiser, ID is April 23. There is still about a 10% chance of frost after May 10, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Weiser, ID?
The median first fall frost is October 13, with about a 10% chance of frost before October 1.
How long is the growing season in Weiser, ID?
About 173 days between the median last spring frost and first fall frost.
What planting zone is Weiser, ID?
Weiser, ID is in USDA hardiness zone 7a.