Tetonia, ID frost dates
Last spring frostJun 13median date
First fall frostSep 9median date
Growing season88 daysfrost-free
Hardiness zone5aZone 5a
How Tetonia compares
- In 8 years out of 10, the last spring frost in Tetonia falls between May 27 and June 28, a 32-day window. The first fall frost falls between August 26 and September 23.
- The median last frost is 30 days later than the Idaho median of May 14.
- Its 88-day growing season is longer than 6% of the 244 Idaho places with a regular frost season (state median 138 days).
- The last frost is 41 days later than the zone 5a median of May 3. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 5a chart.
- The weather station records an average of 204 nights a year at or below 32°F.
- Compared with Idaho Falls, ID, 72 km away, the last frost here is 35 days later than there and the growing season is 57 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 27 |
| 50% (median) | June 13 |
| 10% (safe for tender plants) | June 28 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | August 26 |
| 50% (median) | September 9 |
| 90% (late) | September 23 |
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 Tetonia, ID
Tetonia, ID frost dates — last frost Jun 13, first frost Sep 9, zone 5a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Mar 21 to Apr 4Transplant outside: May 16 to May 30
Start indoors: Apr 4 to Apr 18Transplant outside: Jun 27 to Jul 11
Start indoors: Apr 4 to Apr 18Transplant outside: Jun 27 to Jul 11
Start indoors: Apr 18 to May 2Transplant outside: Jun 20 to Jul 4
Start indoors: Apr 18 to May 2Transplant outside: May 23 to Jun 6Sow outdoors: May 16 to Jun 20Plant for fall: Jul 15 to Aug 12
Start indoors: Apr 18 to May 2Transplant outside: May 16 to May 30Sow outdoors: May 16 to May 30Plant for fall: Jul 1 to Jul 22
Start indoors: Apr 18 to May 2Transplant outside: May 30 to Jun 13
Start indoors: Apr 18 to May 2Transplant outside: May 23 to Jun 6
Start indoors: Apr 18 to May 2Transplant outside: May 30 to Jun 13
Start indoors: May 2 to May 16Transplant outside: Jul 4 to Jul 18Sow outdoors: Jul 4 to Jul 18
Start indoors: May 2 to May 16Transplant outside: Jun 20 to Jul 4
Sow outdoors: May 2 to May 23
Sow outdoors: May 2 to May 23Plant for fall: Jul 15 to Aug 5
Sow outdoors: May 9 to Jun 20Plant for fall: Jul 29 to Aug 19
Start indoors: May 16 to May 23Transplant outside: Jun 27 to Jul 4Sow outdoors: Jun 20 to Jul 4
Start indoors: May 16 to May 23Sow outdoors: Jun 20 to Jul 4
Start indoors: May 16 to May 23Sow outdoors: Jun 20 to Jul 4
Start indoors: May 16 to May 23Transplant outside: Jun 27 to Jul 11
Sow outdoors: May 23 to Jun 20
Sow outdoors: May 23 to Jun 20
Sow outdoors: May 23 to Jun 13
Sow outdoors: May 30 to Jun 27
Sow outdoors: May 30 to Jun 20Plant for fall: Jul 15 to Aug 5
Sow outdoors: Jun 20 to Jul 11
Sow outdoors: Jun 20 to Jul 4
Transplant outside: Jun 27 to Jul 18
Plant for fall: Aug 26 to Sep 30
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Tetonia, ID
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 21 – Apr 4 | May 16 – May 30 | — | — |
| Peppers Warning: Your frost-free season is about 88 days, which is tight for peppers (75+ days). Choose early varieties and use transplants or row covers. | Apr 4 – Apr 18 | Jun 27 – Jul 11 | — | — |
| Eggplant Warning: Your frost-free season is about 88 days, which is tight for eggplant (75+ days). Choose early varieties and use transplants or row covers. | Apr 4 – Apr 18 | Jun 27 – Jul 11 | — | — |
| Tomatoes | Apr 18 – May 2 | Jun 20 – Jul 4 | — | — |
| Lettuce | Apr 18 – May 2 | May 23 – Jun 6 | May 16 – Jun 20 | Jul 15 – Aug 12 |
| Kale | Apr 18 – May 2 | May 16 – May 30 | May 16 – May 30 | Jul 1 – Jul 22 |
| Broccoli | Apr 18 – May 2 | May 30 – Jun 13 | — | — |
| Cabbage | Apr 18 – May 2 | May 23 – Jun 6 | — | — |
| Cauliflower | Apr 18 – May 2 | May 30 – Jun 13 | — | — |
| Okra | May 2 – May 16 | Jul 4 – Jul 18 | Jul 4 – Jul 18 | — |
| Basil | May 2 – May 16 | Jun 20 – Jul 4 | — | — |
| Peas | — | — | May 2 – May 23 | — |
| Spinach | — | — | May 2 – May 23 | Jul 15 – Aug 5 |
| Radishes | — | — | May 9 – Jun 20 | Jul 29 – Aug 19 |
| Cucumbers | May 16 – May 23 | Jun 27 – Jul 4 | Jun 20 – Jul 4 | — |
| Zucchini & Summer Squash | May 16 – May 23 | — | Jun 20 – Jul 4 | — |
| Winter Squash & Pumpkins Warning: Your frost-free season is about 88 days, which is tight for winter squash & pumpkins (100+ days). Choose early varieties and use transplants or row covers. | May 16 – May 23 | — | Jun 20 – Jul 4 | — |
| Melons & Watermelon Warning: Your frost-free season is about 88 days, which is tight for melons & watermelon (85+ days). Choose early varieties and use transplants or row covers. | May 16 – May 23 | Jun 27 – Jul 11 | — | — |
| Carrots | — | — | May 23 – Jun 20 | — |
| Beets | — | — | May 23 – Jun 20 | — |
| Potatoes | — | — | May 23 – Jun 13 | — |
| Swiss Chard | — | — | May 30 – Jun 27 | — |
| Cilantro | — | — | May 30 – Jun 20 | Jul 15 – Aug 5 |
| Green Beans | — | — | Jun 20 – Jul 11 | — |
| Sweet Corn Warning: Your frost-free season is about 88 days, which is tight for sweet corn (80+ days). Choose early varieties and use transplants or row covers. | — | — | Jun 20 – Jul 4 | — |
| Sweet Potatoes Warning: Your frost-free season is about 88 days, which is tight for sweet potatoes (100+ days). Choose early varieties and use transplants or row covers. | — | Jun 27 – Jul 18 | — | — |
| Garlic | — | — | — | Aug 26 – Sep 30 |
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 Driggs, ID weather station, 10 km away (elevation 6,119 ft (1,865 m)).
Frost dates near Tetonia
- Driggs Jun 13 · Sep 9
- Felt Jun 15 · Sep 7
- Victor Jun 13 · Sep 9
- Ashton May 21 · Sep 21
- Newdale May 17 · Sep 22
- Chester May 21 · Sep 21
- Teton May 29 · Sep 13
- Swan Valley frost any month
- Ririe frost any month
- Sugar City May 29 · Sep 13
Frequently asked questions
When is the last frost in Tetonia, ID?
The median last spring frost in Tetonia, ID is June 13. There is still about a 10% chance of frost after June 28, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Tetonia, ID?
The median first fall frost is September 9, with about a 10% chance of frost before August 26.
How long is the growing season in Tetonia, ID?
About 88 days between the median last spring frost and first fall frost.
What planting zone is Tetonia, ID?
Tetonia, ID is in USDA hardiness zone 5a.