Peerless, MT frost dates
Last spring frostMay 28median date
First fall frostSep 6median date
Growing season101 daysfrost-free
Hardiness zone3bZone 3b
How Peerless compares
- In 8 years out of 10, the last spring frost in Peerless falls between May 16 and June 13, a 28-day window. The first fall frost falls between August 24 and September 19.
- The median last frost is 9 days later than the Montana median of May 19.
- Its 101-day growing season is longer than 12% of the 325 Montana places with a regular frost season (state median 125 days).
- The last frost is 11 days later than the zone 3b median of May 17. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 3b chart.
- The weather station records an average of 207 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 16 |
| 50% (median) | May 28 |
| 10% (safe for tender plants) | June 13 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | August 24 |
| 50% (median) | September 6 |
| 90% (late) | September 19 |
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 Peerless, MT
Peerless, MT frost dates — last frost May 28, first frost Sep 6, zone 3b. whenisthelastfrost.com
Crop
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Start indoors: Mar 5 to Mar 19Transplant outside: Apr 30 to May 14
Start indoors: Mar 19 to Apr 2Transplant outside: Jun 11 to Jun 25
Start indoors: Mar 19 to Apr 2Transplant outside: Jun 11 to Jun 25
Start indoors: Apr 2 to Apr 16Transplant outside: Jun 4 to Jun 18
Start indoors: Apr 2 to Apr 16Transplant outside: May 7 to May 21Sow outdoors: Apr 30 to Jun 4Plant for fall: Jul 12 to Aug 9
Start indoors: Apr 2 to Apr 16Transplant outside: Apr 30 to May 14Sow outdoors: Apr 30 to May 14Plant for fall: Jun 28 to Jul 19
Start indoors: Apr 2 to Apr 16Transplant outside: May 14 to May 28
Start indoors: Apr 2 to Apr 16Transplant outside: May 7 to May 21
Start indoors: Apr 2 to Apr 16Transplant outside: May 14 to May 28
Start indoors: Apr 16 to Apr 30Transplant outside: Jun 18 to Jul 2Sow outdoors: Jun 18 to Jul 2
Start indoors: Apr 16 to Apr 30Transplant outside: Jun 4 to Jun 18
Sow outdoors: Apr 16 to May 7Plant for fall: Jun 14 to Jul 5
Sow outdoors: Apr 16 to May 7Plant for fall: Jul 12 to Aug 2
Sow outdoors: Apr 23 to Jun 4Plant for fall: Jul 26 to Aug 16
Start indoors: Apr 30 to May 7Transplant outside: Jun 11 to Jun 18Sow outdoors: Jun 4 to Jun 18
Start indoors: Apr 30 to May 7Sow outdoors: Jun 4 to Jun 18
Start indoors: Apr 30 to May 7Sow outdoors: Jun 4 to Jun 18
Start indoors: Apr 30 to May 7Transplant outside: Jun 11 to Jun 25
Sow outdoors: May 7 to Jun 4
Sow outdoors: May 7 to Jun 4Plant for fall: Jun 28 to Jul 12
Sow outdoors: May 7 to May 28
Sow outdoors: May 14 to Jun 11Plant for fall: Jun 28 to Jul 12
Sow outdoors: May 14 to Jun 4Plant for fall: Jul 12 to Aug 2
Sow outdoors: Jun 4 to Jun 25
Sow outdoors: Jun 4 to Jun 18
Transplant outside: Jun 11 to Jul 2
Plant for fall: Aug 23 to Sep 27
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Peerless, MT
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 5 – Mar 19 | Apr 30 – May 14 | — | — |
| Peppers | Mar 19 – Apr 2 | Jun 11 – Jun 25 | — | — |
| Eggplant | Mar 19 – Apr 2 | Jun 11 – Jun 25 | — | — |
| Tomatoes | Apr 2 – Apr 16 | Jun 4 – Jun 18 | — | — |
| Lettuce | Apr 2 – Apr 16 | May 7 – May 21 | Apr 30 – Jun 4 | Jul 12 – Aug 9 |
| Kale | Apr 2 – Apr 16 | Apr 30 – May 14 | Apr 30 – May 14 | Jun 28 – Jul 19 |
| Broccoli | Apr 2 – Apr 16 | May 14 – May 28 | — | — |
| Cabbage | Apr 2 – Apr 16 | May 7 – May 21 | — | — |
| Cauliflower | Apr 2 – Apr 16 | May 14 – May 28 | — | — |
| Okra | Apr 16 – Apr 30 | Jun 18 – Jul 2 | Jun 18 – Jul 2 | — |
| Basil | Apr 16 – Apr 30 | Jun 4 – Jun 18 | — | — |
| Peas | — | — | Apr 16 – May 7 | Jun 14 – Jul 5 |
| Spinach | — | — | Apr 16 – May 7 | Jul 12 – Aug 2 |
| Radishes | — | — | Apr 23 – Jun 4 | Jul 26 – Aug 16 |
| Cucumbers | Apr 30 – May 7 | Jun 11 – Jun 18 | Jun 4 – Jun 18 | — |
| Zucchini & Summer Squash | Apr 30 – May 7 | — | Jun 4 – Jun 18 | — |
| Winter Squash & Pumpkins Warning: Your frost-free season is about 101 days, which is tight for winter squash & pumpkins (100+ days). Choose early varieties and use transplants or row covers. | Apr 30 – May 7 | — | Jun 4 – Jun 18 | — |
| Melons & Watermelon | Apr 30 – May 7 | Jun 11 – Jun 25 | — | — |
| Carrots | — | — | May 7 – Jun 4 | — |
| Beets | — | — | May 7 – Jun 4 | Jun 28 – Jul 12 |
| Potatoes | — | — | May 7 – May 28 | — |
| Swiss Chard | — | — | May 14 – Jun 11 | Jun 28 – Jul 12 |
| Cilantro | — | — | May 14 – Jun 4 | Jul 12 – Aug 2 |
| Green Beans | — | — | Jun 4 – Jun 25 | — |
| Sweet Corn | — | — | Jun 4 – Jun 18 | — |
| Sweet Potatoes Warning: Your frost-free season is about 101 days, which is tight for sweet potatoes (100+ days). Choose early varieties and use transplants or row covers. | — | Jun 11 – Jul 2 | — | — |
| Garlic | — | — | — | Aug 23 – Sep 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 Scobey 4 Nw, MT weather station, 25 km away (elevation 2,392 ft (729 m)).
Frost dates near Peerless
- Richland Jun 5 · Sep 2
- Scobey May 28 · Sep 6
- Glentana Jun 5 · Sep 2
- Larslan Jun 5 · Sep 2
- Opheim Jun 1 · Sep 7
- Flaxville May 28 · Sep 7
- Whitetail May 28 · Sep 7
- Frazer May 12 · Sep 24
- Redstone May 28 · Sep 7
- Saint Marie May 13 · Sep 27
Frequently asked questions
When is the last frost in Peerless, MT?
The median last spring frost in Peerless, MT is May 28. There is still about a 10% chance of frost after June 13, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Peerless, MT?
The median first fall frost is September 6, with about a 10% chance of frost before August 24.
How long is the growing season in Peerless, MT?
About 101 days between the median last spring frost and first fall frost.
What planting zone is Peerless, MT?
Peerless, MT is in USDA hardiness zone 3b.