| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F | |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 13i - Malad and Cache Valleys | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 84330 - Plymouth, UT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 19 | 27 | 33 | 40 | 48 | 54 | 53 | 44 | 34 | 23 | 15 | 34 |
| Avg Max Temp (°F) | 32 | 39 | 49 | 58 | 67 | 79 | 87 | 86 | 75 | 62 | 44 | 34 | 59 |
| Avg Precip (In.) | 1.42 | 1.32 | 1.58 | 1.26 | 2.23 | .96 | .87 | .81 | 1.23 | 1.33 | 1.08 | 1.05 | 15.13 |