Lowman, ID frost dates
Last spring frostJun 6median date
First fall frostSep 4median date
Growing season90 daysfrost-free
Hardiness zone6aZone 6a
How Lowman compares
- In 8 years out of 10, the last spring frost in Lowman falls between May 18 and July 1, a 44-day window. The first fall frost falls between August 19 and September 24.
- The median last frost is 23 days later than the Idaho median of May 14.
- Its 90-day growing season is longer than 7% of the 244 Idaho places with a regular frost season (state median 138 days).
- The last frost is 38 days later than the zone 6a median of Apr 29. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6a chart.
- The weather station records an average of 211 nights a year at or below 32°F.
- Compared with Boise, ID, 85 km away, the last frost here is 43 days later than there and the growing season is 90 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 18 |
| 50% (median) | June 6 |
| 10% (safe for tender plants) | July 1 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | August 19 |
| 50% (median) | September 4 |
| 90% (late) | September 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 Lowman, ID
Lowman, ID frost dates — last frost Jun 6, first frost Sep 4, zone 6a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Mar 14 to Mar 28Transplant outside: May 9 to May 23
Start indoors: Mar 28 to Apr 11Transplant outside: Jun 20 to Jul 4
Start indoors: Mar 28 to Apr 11Transplant outside: Jun 20 to Jul 4
Start indoors: Apr 11 to Apr 25Transplant outside: Jun 13 to Jun 27
Start indoors: Apr 11 to Apr 25Transplant outside: May 16 to May 30Sow outdoors: May 9 to Jun 13Plant for fall: Jul 10 to Aug 7
Start indoors: Apr 11 to Apr 25Transplant outside: May 9 to May 23Sow outdoors: May 9 to May 23Plant for fall: Jun 26 to Jul 17
Start indoors: Apr 11 to Apr 25Transplant outside: May 23 to Jun 6
Start indoors: Apr 11 to Apr 25Transplant outside: May 16 to May 30
Start indoors: Apr 11 to Apr 25Transplant outside: May 23 to Jun 6
Start indoors: Apr 25 to May 9Transplant outside: Jun 27 to Jul 11Sow outdoors: Jun 27 to Jul 11
Start indoors: Apr 25 to May 9Transplant outside: Jun 13 to Jun 27
Sow outdoors: Apr 25 to May 16
Sow outdoors: Apr 25 to May 16Plant for fall: Jul 10 to Jul 31
Sow outdoors: May 2 to Jun 13Plant for fall: Jul 24 to Aug 14
Start indoors: May 9 to May 16Transplant outside: Jun 20 to Jun 27Sow outdoors: Jun 13 to Jun 27
Start indoors: May 9 to May 16Sow outdoors: Jun 13 to Jun 27
Start indoors: May 9 to May 16Sow outdoors: Jun 13 to Jun 27
Start indoors: May 9 to May 16Transplant outside: Jun 20 to Jul 4
Sow outdoors: May 16 to Jun 13
Sow outdoors: May 16 to Jun 13
Sow outdoors: May 16 to Jun 6
Sow outdoors: May 23 to Jun 20
Sow outdoors: May 23 to Jun 13Plant for fall: Jul 10 to Jul 31
Sow outdoors: Jun 13 to Jul 4
Sow outdoors: Jun 13 to Jun 27
Transplant outside: Jun 20 to Jul 11
Plant for fall: Aug 21 to Sep 25
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Lowman, ID
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 14 – Mar 28 | May 9 – May 23 | — | — |
| Peppers | Mar 28 – Apr 11 | Jun 20 – Jul 4 | — | — |
| Eggplant | Mar 28 – Apr 11 | Jun 20 – Jul 4 | — | — |
| Tomatoes | Apr 11 – Apr 25 | Jun 13 – Jun 27 | — | — |
| Lettuce | Apr 11 – Apr 25 | May 16 – May 30 | May 9 – Jun 13 | Jul 10 – Aug 7 |
| Kale | Apr 11 – Apr 25 | May 9 – May 23 | May 9 – May 23 | Jun 26 – Jul 17 |
| Broccoli | Apr 11 – Apr 25 | May 23 – Jun 6 | — | — |
| Cabbage | Apr 11 – Apr 25 | May 16 – May 30 | — | — |
| Cauliflower | Apr 11 – Apr 25 | May 23 – Jun 6 | — | — |
| Okra | Apr 25 – May 9 | Jun 27 – Jul 11 | Jun 27 – Jul 11 | — |
| Basil | Apr 25 – May 9 | Jun 13 – Jun 27 | — | — |
| Peas | — | — | Apr 25 – May 16 | — |
| Spinach | — | — | Apr 25 – May 16 | Jul 10 – Jul 31 |
| Radishes | — | — | May 2 – Jun 13 | Jul 24 – Aug 14 |
| Cucumbers | May 9 – May 16 | Jun 20 – Jun 27 | Jun 13 – Jun 27 | — |
| Zucchini & Summer Squash | May 9 – May 16 | — | Jun 13 – Jun 27 | — |
| Winter Squash & Pumpkins Warning: Your frost-free season is about 90 days, which is tight for winter squash & pumpkins (100+ days). Choose early varieties and use transplants or row covers. | May 9 – May 16 | — | Jun 13 – Jun 27 | — |
| Melons & Watermelon Warning: Your frost-free season is about 90 days, which is tight for melons & watermelon (85+ days). Choose early varieties and use transplants or row covers. | May 9 – May 16 | Jun 20 – Jul 4 | — | — |
| Carrots | — | — | May 16 – Jun 13 | — |
| Beets | — | — | May 16 – Jun 13 | — |
| Potatoes | — | — | May 16 – Jun 6 | — |
| Swiss Chard | — | — | May 23 – Jun 20 | — |
| Cilantro | — | — | May 23 – Jun 13 | Jul 10 – Jul 31 |
| Green Beans | — | — | Jun 13 – Jul 4 | — |
| Sweet Corn Warning: Your frost-free season is about 90 days, which is tight for sweet corn (80+ days). Choose early varieties and use transplants or row covers. | — | — | Jun 13 – Jun 27 | — |
| Sweet Potatoes Warning: Your frost-free season is about 90 days, which is tight for sweet potatoes (100+ days). Choose early varieties and use transplants or row covers. | — | Jun 20 – Jul 11 | — | — |
| Garlic | — | — | — | Aug 21 – Sep 25 |
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 Lowman, ID weather station, 8 km away (elevation 3,921 ft (1,195 m)).
Frost dates near Lowman
- Garden Valley Jun 1 · Sep 10
- Idaho City Jun 17 · Sep 5
- Atlanta Jun 6 · Sep 4
- Placerville Jun 1 · Sep 10
- Banks Jun 1 · Sep 10
- Horseshoe Bend May 17 · Oct 12
- Stanley frost any month
- Ola May 31 · Sep 16
- Sweet Apr 30 · Oct 17
- Cascade frost any month
Frequently asked questions
When is the last frost in Lowman, ID?
The median last spring frost in Lowman, ID is June 6. There is still about a 10% chance of frost after July 1, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Lowman, ID?
The median first fall frost is September 4, with about a 10% chance of frost before August 19.
How long is the growing season in Lowman, ID?
About 90 days between the median last spring frost and first fall frost.
What planting zone is Lowman, ID?
Lowman, ID is in USDA hardiness zone 6a.