Frost dates for 84341Logan, UT
The average last spring frost in Logan is April 30 and the average first fall frost is October 16, giving a typical growing season of about 166 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 30
- Average first fall frost
- Oct 16
- Growing season
- 166 days
Safer after May 19 (1-in-10 risk)
Possible by Oct 1 (1-in-10 risk)
Last frost typically in 185 days
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | Apr 30 · May 17 · Jun 7 | Sep 22 · Oct 5 · Oct 18 | 139 days | 100% |
| Frost / freeze (32°F) | Apr 14 · Apr 30 · May 19 | Oct 1 · Oct 16 · Oct 29 | 166 days | 100% |
| Hard freeze (28°F) | Mar 28 · Apr 15 · May 2 | Oct 12 · Oct 27 · Nov 11 | 196 days | 100% |
Planting calendar for Logan
Planting windows from the University of Maryland Extension calendar, shifted to your average frost dates. Use them as a starting point and adjust for seed packet instructions and local conditions.
| Crop | Task | Window |
|---|---|---|
| Tomatoes | Start seeds indoors | Mar 30 – Jun 5 |
| Tomatoes | Transplant outdoors | May 16 – Jun 26 |
| Peppers | Start seeds indoors | Mar 30 – Apr 30 |
| Peppers | Transplant outdoors | May 30 – Jun 30 |
| Eggplant | Start seeds indoors | Apr 16 – May 15 |
| Eggplant | Transplant outdoors | May 30 – Jun 30 |
| Cucumbers | Sow outdoors | May 30 – Jul 6 |
| Summer squash | Sow outdoors | May 16 – Jun 30 |
| Winter squash & pumpkins | Sow outdoors | May 30 – Jun 30 |
| Snap beans | Sow outdoors | May 16 – Jul 29 |
| Sweet corn | Sow outdoors | May 16 – Jun 26 |
| Watermelon & cantaloupe | Sow outdoors | May 30 – Jun 30 |
| Okra | Sow outdoors | May 23 – Jun 15 |
| Peas | Sow outdoors (spring) | Mar 30 – May 15 |
| Potatoes | Plant outdoors (spring) | Mar 30 – May 30 |
| Onions | Start seeds indoors (spring) | Feb 16 – Mar 15 |
| Onions | Transplant outdoors (spring) | Apr 16 – May 15 |
| Broccoli | Start seeds indoors (spring) | Mar 12 – Apr 15 |
| Broccoli | Transplant outdoors (spring) | Apr 16 – May 15 |
| Broccoli | Start seeds indoors (fall) | Jun 16 – Jun 26 |
| Broccoli | Transplant outdoors (fall) | Jul 16 – Jul 27 |
| Cabbage | Start seeds indoors (spring) | Mar 2 – Mar 30 |
| Cabbage | Transplant outdoors (spring) | Mar 30 – Apr 30 |
| Cabbage | Start seeds indoors (fall) | Jun 6 – Jul 6 |
| Cabbage | Transplant outdoors (fall) | Jul 6 – Aug 6 |
| Leaf lettuce | Sow outdoors (spring) | Mar 30 – Jun 15 |
| Leaf lettuce | Sow outdoors (fall) | Jul 6 – Aug 22 |
| Spinach | Sow outdoors (spring) | Mar 23 – May 6 |
| Spinach | Sow outdoors (fall) | Jul 23 – Aug 27 |
| Radishes | Sow outdoors (spring) | Mar 30 – May 20 |
| Radishes | Sow outdoors (fall) | Jul 6 – Sep 6 |
| Kale | Sow outdoors (spring) | Apr 16 – May 6 |
| Kale | Sow outdoors (fall) | Jun 29 – Aug 6 |
| Carrots | Sow outdoors (spring) | Apr 30 – Jun 15 |
| Carrots | Sow outdoors (fall) | Jun 6 – Jul 22 |
| Garlic | Plant outdoors (fall) | Oct 6 – Nov 6 |
Where these dates come from
ZIP code 84341 is matched to the NOAA station Logan Utah St Univ, UT, 3.4 km away, at 4,790 ft elevation (141 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Logan Utah St Univ, UT (used) | 4,790 ft | Apr 30 | Oct 16 |
| Logan Cache Ap, UT | 4,454 ft | May 8 | Oct 2 |
| Logan Radio Kvnu, UT | 4,475 ft | May 8 | Oct 2 |
| Logan 5 Sw Exp Farm, UT | 4,488 ft | May 12 | Sep 28 |
Frost dates near Logan
- Hyde Park, UT 84318 · last May 8, first Oct 2
- Logan, UT 84321 · last May 8, first Oct 2
- Smithfield, UT 84335 · last May 8, first Oct 2
- Providence, UT 84332 · last Apr 30, first Oct 16
- Millville, UT 84326 · last May 12, first Sep 28
- Mendon, UT 84325 · last May 12, first Sep 28
- Hyrum, UT 84319 · last Apr 30, first Oct 16
- Cache Junction, UT 84304 · last May 8, first Oct 2
Frequently asked questions
- When is the last frost in Logan, UT?
- For ZIP code 84341, the average last spring frost (32°F) is April 30, based on NOAA 1991-2020 climate normals for the Logan Utah St Univ, UT weather station. There is a 1-in-10 chance of a frost after May 19.
- When is the first frost in Logan, UT?
- The average first fall frost (32°F) is October 16. There is a 1-in-10 chance of frost by October 1, so tender plants are at risk from that point on.
- How long is the growing season in 84341?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 166 days long.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.