Murphy, ID frost dates
Last spring frostMay 31median date
First fall frostOct 6median date
Growing season128 daysfrost-free
Hardiness zone7aZone 7a
How Murphy compares
- In 8 years out of 10, the last spring frost in Murphy falls between May 4 and June 17, a 44-day window. The first fall frost falls between September 10 and October 25.
- The median last frost is 17 days later than the Idaho median of May 14.
- Its 128-day growing season is longer than 32% of the 244 Idaho places with a regular frost season (state median 138 days).
- The last frost is 45 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 172 nights a year at or below 32°F.
- Compared with Boise, ID, 84 km away, the last frost here is 37 days later than there and the growing season is 52 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 4 |
| 50% (median) | May 31 |
| 10% (safe for tender plants) | June 17 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 10 |
| 50% (median) | October 6 |
| 90% (late) | October 25 |
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 Murphy, ID
Murphy, ID frost dates — last frost May 31, first frost Oct 6, zone 7a. whenisthelastfrost.com
Crop
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Start indoors: Mar 8 to Mar 22Transplant outside: May 3 to May 17
Start indoors: Mar 22 to Apr 5Transplant outside: Jun 14 to Jun 28
Start indoors: Mar 22 to Apr 5Transplant outside: Jun 14 to Jun 28
Start indoors: Apr 5 to Apr 19Transplant outside: Jun 7 to Jun 21
Start indoors: Apr 5 to Apr 19Transplant outside: May 10 to May 24Sow outdoors: May 3 to Jun 7Plant for fall: Aug 11 to Sep 8
Start indoors: Apr 5 to Apr 19Transplant outside: May 3 to May 17Sow outdoors: May 3 to May 17Plant for fall: Jul 28 to Aug 18
Start indoors: Apr 5 to Apr 19Transplant outside: May 17 to May 31Plant for fall: Jun 30 to Jul 21
Start indoors: Apr 5 to Apr 19Transplant outside: May 10 to May 24Plant for fall: Jun 30 to Jul 21
Start indoors: Apr 5 to Apr 19Transplant outside: May 17 to May 31Plant for fall: Jun 30 to Jul 21
Start indoors: Apr 19 to May 3Transplant outside: Jun 21 to Jul 5Sow outdoors: Jun 21 to Jul 5
Start indoors: Apr 19 to May 3Transplant outside: Jun 7 to Jun 21
Sow outdoors: Apr 19 to May 10Plant for fall: Jul 14 to Aug 4
Sow outdoors: Apr 19 to May 10Plant for fall: Aug 11 to Sep 1
Sow outdoors: Apr 26 to Jun 7Plant for fall: Aug 25 to Sep 15
Start indoors: May 3 to May 10Transplant outside: Jun 14 to Jun 21Sow outdoors: Jun 7 to Jun 21Plant for fall: Jul 21 to Aug 4
Start indoors: May 3 to May 10Sow outdoors: Jun 7 to Jun 21Plant for fall: Jul 28 to Aug 11
Start indoors: May 3 to May 10Sow outdoors: Jun 7 to Jun 21
Start indoors: May 3 to May 10Transplant outside: Jun 14 to Jun 28
Sow outdoors: May 10 to Jun 7Plant for fall: Jul 14 to Jul 28
Sow outdoors: May 10 to Jun 7Plant for fall: Jul 28 to Aug 11
Sow outdoors: May 10 to May 31
Sow outdoors: May 17 to Jun 14Plant for fall: Jul 28 to Aug 11
Sow outdoors: May 17 to Jun 7Plant for fall: Aug 11 to Sep 1
Sow outdoors: Jun 7 to Jun 28Plant for fall: Jul 21 to Aug 4
Sow outdoors: Jun 7 to Jun 21
Transplant outside: Jun 14 to Jul 5
Plant for fall: Sep 22 to Oct 27
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Murphy, ID
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 8 – Mar 22 | May 3 – May 17 | — | — |
| Peppers | Mar 22 – Apr 5 | Jun 14 – Jun 28 | — | — |
| Eggplant | Mar 22 – Apr 5 | Jun 14 – Jun 28 | — | — |
| Tomatoes | Apr 5 – Apr 19 | Jun 7 – Jun 21 | — | — |
| Lettuce | Apr 5 – Apr 19 | May 10 – May 24 | May 3 – Jun 7 | Aug 11 – Sep 8 |
| Kale | Apr 5 – Apr 19 | May 3 – May 17 | May 3 – May 17 | Jul 28 – Aug 18 |
| Broccoli | Apr 5 – Apr 19 | May 17 – May 31 | — | Jun 30 – Jul 21 |
| Cabbage | Apr 5 – Apr 19 | May 10 – May 24 | — | Jun 30 – Jul 21 |
| Cauliflower | Apr 5 – Apr 19 | May 17 – May 31 | — | Jun 30 – Jul 21 |
| Okra | Apr 19 – May 3 | Jun 21 – Jul 5 | Jun 21 – Jul 5 | — |
| Basil | Apr 19 – May 3 | Jun 7 – Jun 21 | — | — |
| Peas | — | — | Apr 19 – May 10 | Jul 14 – Aug 4 |
| Spinach | — | — | Apr 19 – May 10 | Aug 11 – Sep 1 |
| Radishes | — | — | Apr 26 – Jun 7 | Aug 25 – Sep 15 |
| Cucumbers | May 3 – May 10 | Jun 14 – Jun 21 | Jun 7 – Jun 21 | Jul 21 – Aug 4 |
| Zucchini & Summer Squash | May 3 – May 10 | — | Jun 7 – Jun 21 | Jul 28 – Aug 11 |
| Winter Squash & Pumpkins | May 3 – May 10 | — | Jun 7 – Jun 21 | — |
| Melons & Watermelon | May 3 – May 10 | Jun 14 – Jun 28 | — | — |
| Carrots | — | — | May 10 – Jun 7 | Jul 14 – Jul 28 |
| Beets | — | — | May 10 – Jun 7 | Jul 28 – Aug 11 |
| Potatoes | — | — | May 10 – May 31 | — |
| Swiss Chard | — | — | May 17 – Jun 14 | Jul 28 – Aug 11 |
| Cilantro | — | — | May 17 – Jun 7 | Aug 11 – Sep 1 |
| Green Beans | — | — | Jun 7 – Jun 28 | Jul 21 – Aug 4 |
| Sweet Corn | — | — | Jun 7 – Jun 21 | — |
| Sweet Potatoes | — | Jun 14 – Jul 5 | — | — |
| Garlic | — | — | — | Sep 22 – Oct 27 |
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 Silver City 5 W, ID weather station, 23 km away (elevation 6,161 ft (1,878 m)).
Frost dates near Murphy
- Grand View Apr 28 · Oct 6
- Melba Apr 12 · Oct 26
- Bruneau Apr 17 · Oct 17
- Kuna Apr 24 · Oct 21
- Marsing Apr 23 · Oct 18
- Mountain Home May 2 · Oct 8
- Boise Apr 24 · Oct 21
- Nampa Apr 29 · Oct 13
- Huston Apr 23 · Oct 18
- Meridian Apr 29 · Oct 13
Frequently asked questions
When is the last frost in Murphy, ID?
The median last spring frost in Murphy, ID is May 31. There is still about a 10% chance of frost after June 17, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Murphy, ID?
The median first fall frost is October 6, with about a 10% chance of frost before September 10.
How long is the growing season in Murphy, ID?
About 128 days between the median last spring frost and first fall frost.
What planting zone is Murphy, ID?
Murphy, ID is in USDA hardiness zone 7a.