Idaho Calculated Average and Minimum USDA Hardiness Zones
County | Weather Station | Elev. (feet) | Average Annual Minimum Temperature (°F) | Absolute Minimum (°F) | Average and Minimum Hardiness Zones | Years of Data |
---|---|---|---|---|---|---|
Ada | Boise Air Terminal | 2814 | 3.2 | -25.6 | Zones 7a, 4a | 30 |
Ada | Orchard Range Site | 3150 | -2.2 | -29.2 | Zones 6b, 4a | 26 |
Ada | Swan Falls Power House | 2325 | 6.8 | -20.2 | Zones 7b, 4b | 30 |
Bear Lake | Bern | 5964 | -20.2 | -29.2 | Zones 4b, 4a | 28 |
Bear Lake | Giveout | 6930 | -16.6 | -32.8 | Zones 5a, 3b | 30 |
Bear Lake | Lifton Pumping Station | 5935 | -16.6 | -29.2 | Zones 5a, 4a | 30 |
Bear Lake | Slug Creek Divide | 7225 | -13 | -31 | Zones 5b, 3b | 30 |
Bingham | Aberdeen Exp. Stn. | 4405 | -13 | -29.2 | Zones 5b, 4a | 30 |
Bingham | Sheep Mtn | 6570 | -9.4 | -27.4 | Zones 6a, 4a | 30 |
Blaine | Chocolate Gulch | 6440 | -13 | -22 | Zones 5b, 4b | 27 |
Blaine | Dollarhide Summit | 8420 | -5.8 | -22 | Zones 6a, 4b | 30 |
Blaine | Galena Summit | 8780 | -11.2 | -29.2 | Zones 5b, 4a | 30 |
Blaine | Garfield R.S. | 6560 | -11.2 | -31 | Zones 5b, 3b | 30 |
Blaine | Hyndman | 7440 | -11.2 | -29.2 | Zones 5b, 4a | 30 |
Blaine | Ketchum RS | 5890 | -13 | -36.4 | Zones 5b, 3a | 30 |
Blaine | Lost Wood Divide | 7900 | -16.6 | -25.6 | Zones 5a, 4a | 30 |
Blaine | Ohio Gulch Idaho | 6220 | -7.6 | -27.4 | Zones 6a, 4a | 30 |
Blaine | Picabo | 4839 | -14.8 | -36.4 | Zones 5b, 3a | 30 |
Blaine | Potter Butte Idaho | 4930 | -9.4 | -32.8 | Zones 6a, 3b | 30 |
Blaine | Swede Peak | 7640 | -5.8 | -25.6 | Zones 6a, 4a | 30 |
Blaine | Vienna Mine | 8960 | -11.2 | -27.4 | Zones 5b, 4a | 30 |
Bonneville | Idaho Falls KIFI | 4742 | -11.2 | -18.4 | Zones 5b, 5a | 30 |
Bonneville | Idaho Falls 16 SE | 5828 | -20.2 | -41.8 | Zones 4b, 2b | 30 |
Bonneville | Idaho Falls Fanning Fld | 4729 | -14.8 | -29.2 | Zones 5b, 4a | 27 |
Bonneville | Palisades | 5384 | -11.2 | -18.4 | Zones 5b, 5a | 18 |
Bonneville | Swan Valley 2 E | 5397 | -16.6 | -43.6 | Zones 5a, 2b | 30 |
Butte | Arco Idaho | 5380 | -22 | -43.6 | Zones 4b, 2b | 30 |
Butte | Craters of the Moon | 5914 | -11.2 | -29.2 | Zones 5b, 4a | 30 |
Butte | Idaho Falls 46 W | 4938 | -22 | -38.2 | Zones 4b, 3a | 30 |
Camas | Fairfield RS | 5065 | -20.2 | -32.8 | Zones 4b, 3b | 30 |
Canyon | Deer Flat Dam | 2510 | 5 | -22 | Zones 7a, 4b | 25 |
Canyon | Nampa Sugar Factory | 2470 | 3.2 | -25.6 | Zones 7a, 4a | 25 |
Canyon | Parma Exp St | 2290 | 3.2 | -20.2 | Zones 7a, 4b | 27 |
Caribou | Grace Idaho | 6210 | -2.2 | -23.8 | Zones 6b, 4b | 30 |
Caribou | Grace | 5550 | -18.4 | -40 | Zones 5a, 3a | 30 |
Caribou | Pole Canyon Idaho | 6700 | -2.2 | -20.2 | Zones 6b, 4b | 30 |
Caribou | Somsen Ranch | 6800 | -13 | -27.4 | Zones 5b, 4a | 30 |
Cassia | Bostetter R.S. | 7500 | -5.8 | -22 | Zones 6a, 4b | 30 |
Cassia | Burley Muni Ap | 4142 | -4 | -23.8 | Zones 6b, 4b | 30 |
Cassia | Goose Creek Idaho | 5660 | -2.2 | -27.4 | Zones 6b, 4a | 30 |
Cassia | Howell Canyon | 7980 | -7.6 | -25.6 | Zones 6a, 4a | 30 |
Cassia | Malta | 4521 | -7.6 | -25.6 | Zones 6a, 4a | 26 |
Cassia | Moburg Canyon Idaho | 6400 | 1.4 | -18.4 | Zones 7a, 5a | 30 |
Cassia | Oakley | 4600 | -4 | -23.8 | Zones 6b, 4b | 30 |
Cassia | Raft River Idaho | 4400 | -13 | -34.6 | Zones 5b, 3b | 30 |
Elmore | Atlanta Summit | 7580 | -5.8 | -23.8 | Zones 6a, 4b | 30 |
Elmore | Camas Creek Divide | 5710 | -4 | -14.8 | Zones 6b, 5b | 30 |
Elmore | Deer Haven Idaho | 5550 | 1.4 | -22 | Zones 7a, 4b | 30 |
Elmore | Graham Guard St | 5690 | -20.2 | -38.2 | Zones 4b, 3a | 30 |
Gooding | Hagerman 2 SW | 2897 | -0.4 | -25.6 | Zones 6b, 4a | 29 |
Jerome | Hazelton | 4060 | -4 | -23.8 | Zones 6b, 4b | 29 |
Jerome | Jerome | 3740 | -0.4 | -23.8 | Zones 6b, 4b | 30 |
Lincoln | Richfield | 4309 | -9.4 | -36.4 | Zones 6a, 3a | 30 |
Lincoln | Rock Lake Idaho | 4260 | -9.4 | -34.6 | Zones 6a, 3b | 30 |
Lincoln | Shoshone 1 WNW | 3950 | -4 | -27.4 | Zones 6b, 4a | 30 |
Minidoka | Minidoka Dam | 4164 | -7.6 | -25.6 | Zones 6a, 4a | 30 |
Minidoka | Paul 1 ENE | 4149 | -4 | -25.6 | Zones 6b, 4a | 29 |
Oneida | Flint Creek Idaho | 5200 | -0.4 | -25.6 | Zones 6b, 4a | 30 |
Oneida | Malad City | 4470 | -9.4 | -32.8 | Zones 6a, 3b | 29 |
Oneida | Oxford Spring | 6740 | -2.2 | -22 | Zones 6b, 4b | 30 |
Owyhee | Brace Flat Idaho | 4890 | -11.2 | -38.2 | Zones 5b, 3a | 30 |
Owyhee | Grand View 4 NW | 2400 | 1.4 | -29.2 | Zones 7a, 4a | 21 |
Owyhee | Horse Butte Idaho | 5000 | -0.4 | -25.6 | Zones 6b, 4a | 30 |
Owyhee | Mud Flat | 5730 | -11.2 | -34.6 | Zones 5b, 3b | 30 |
Owyhee | Murphy (Desert) Hot Springs | 5152 | -5.8 | -27.4 | Zones 6a, 4a | 24 |
Owyhee | Pole Creek Idaho | 5660 | -4 | -29.2 | Zones 6b, 4a | 30 |
Owyhee | Reynolds | 3930 | -0.4 | -20.2 | Zones 6b, 4b | 25 |
Owyhee | South Mtn. | 6500 | 3.2 | -22 | Zones 7a, 4b | 30 |
Owyhee | Triangle Idaho | 5270 | -13 | -38.2 | Zones 5b, 3a | 30 |
Owyhee | Twin Buttes Idaho | 3350 | 1.4 | -22 | Zones 7a, 4b | 30 |
Power | Bull Canyon Idaho | 6400 | -0.4 | -20.2 | Zones 6b, 4b | 30 |
Power | Crystal Idaho | 5064 | -7.6 | -36.4 | Zones 6a, 3a | 30 |
Power | Massacre Rocks SP | 4195 | -5.8 | -25.6 | Zones 6a, 4a | 30 |
Power | Pocatello Rgnl Ap | 4478 | -11.2 | -29.2 | Zones 5b, 4a | 30 |
Twin Falls | Buhl #2 | 3800 | -0.4 | -25.6 | Zones 6b, 4a | 26 |
Twin Falls | Bull Spring Idaho | 5700 | -16.6 | -36.4 | Zones 5a, 3a | 30 |
Twin Falls | Castleford 2 N | 3825 | -2.2 | -25.6 | Zones 6b, 4a | 29 |
Twin Falls | Magic Mountain | 6880 | -5.8 | -27.4 | Zones 6a, 4a | 30 |
Twin Falls | Trail Gulch Idaho | 6000 | 3.2 | -20.2 | Zones 7a, 4b | 30 |
Twin Falls | Twin Falls Sun Vly Rgnl Ap | 4151 | -0.4 | -14.8 | Zones 6b, 5b | 23 |