Frost dates for 84050Morgan, UT
The average last spring frost in Morgan is May 25 and the average first fall frost is September 24, giving a typical growing season of about 119 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 25
- Average first fall frost
- Sep 24
- Growing season
- 119 days
Safer after Jun 13 (1-in-10 risk)
Possible by Sep 11 (1-in-10 risk)
Last frost typically in 206 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) | May 28 · Jun 11 · Jun 26 | Sep 1 · Sep 14 · Sep 28 | 93 days | 100% |
| Frost / freeze (32°F) | May 7 · May 25 · Jun 13 | Sep 11 · Sep 24 · Oct 6 | 119 days | 100% |
| Hard freeze (28°F) | Apr 22 · May 8 · May 31 | Sep 21 · Oct 4 · Oct 19 | 147 days | 100% |
Planting calendar for Morgan
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 | Apr 24 – Jun 30 |
| Tomatoes | Transplant outdoors | Jun 10 – Jun 4 |
| Peppers | Start seeds indoors | Apr 24 – May 25 |
| Peppers | Transplant outdoors | Jun 24 – Jul 25 |
| Eggplant | Start seeds indoors | May 11 – Jun 9 |
| Eggplant | Transplant outdoors | Jun 24 – Jul 25 |
| Cucumbers | Sow outdoors | Jun 24 – Jun 14 |
| Summer squash | Sow outdoors | Jun 10 – Jul 25 |
| Winter squash & pumpkins | Sow outdoors | Jun 24 – Jul 25 |
| Snap beans | Sow outdoors | Jun 10 – Jul 7 |
| Sweet corn | Sow outdoors | Jun 10 – Jun 4 |
| Watermelon & cantaloupe | Sow outdoors | Jun 24 – Jul 25 |
| Okra | Sow outdoors | Jun 17 – Jul 10 |
| Peas | Sow outdoors (spring) | Apr 24 – Jun 9 |
| Potatoes | Plant outdoors (spring) | Apr 24 – Jun 24 |
| Onions | Start seeds indoors (spring) | Mar 13 – Apr 9 |
| Onions | Transplant outdoors (spring) | May 11 – Jun 9 |
| Broccoli | Start seeds indoors (spring) | Apr 6 – May 10 |
| Broccoli | Transplant outdoors (spring) | May 11 – Jun 9 |
| Broccoli | Start seeds indoors (fall) | May 25 – Jun 4 |
| Broccoli | Transplant outdoors (fall) | Jun 24 – Jul 5 |
| Cabbage | Start seeds indoors (spring) | Mar 27 – Apr 24 |
| Cabbage | Transplant outdoors (spring) | Apr 24 – May 25 |
| Cabbage | Start seeds indoors (fall) | May 15 – Jun 14 |
| Cabbage | Transplant outdoors (fall) | Jun 14 – Jul 15 |
| Leaf lettuce | Sow outdoors (spring) | Apr 24 – Jul 10 |
| Leaf lettuce | Sow outdoors (fall) | Jun 14 – Jul 31 |
| Spinach | Sow outdoors (spring) | Apr 17 – May 31 |
| Spinach | Sow outdoors (fall) | Jul 1 – Aug 5 |
| Radishes | Sow outdoors (spring) | Apr 24 – Jun 14 |
| Radishes | Sow outdoors (fall) | Jun 14 – Aug 15 |
| Kale | Sow outdoors (spring) | May 11 – May 31 |
| Kale | Sow outdoors (fall) | Jun 7 – Jul 15 |
| Carrots | Sow outdoors (spring) | May 25 – Jul 10 |
| Carrots | Sow outdoors (fall) | May 15 – Jun 30 |
| Garlic | Plant outdoors (fall) | Sep 14 – Oct 15 |
Where these dates come from
ZIP code 84050 is matched to the NOAA station Morgan, UT, 2.5 km away, at 5,100 ft elevation (110 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Morgan, UT (used) | 5,100 ft | May 25 | Sep 24 |
| Weber Basin Pump Plt 3, UT | 4,900 ft | Apr 29 | Oct 20 |
| Farmington 3 Nw, UT | 4,380 ft | Apr 19 | Oct 19 |
| Huntsville Monastery, UT | 5,140 ft | Jun 4 | Sep 16 |
Frost dates near Morgan
- Croydon, UT 84018 · last May 30, first Sep 18
- Farmington, UT 84025 · last Apr 19, first Oct 19
- Layton, UT 84040 · last Apr 22, first Oct 22
- Kaysville, UT 84037 · last Apr 19, first Oct 19
- Henefer, UT 84033 · last May 30, first Sep 18
- Centerville, UT 84014 · last Apr 24, first Oct 19
- Huntsville, UT 84317 · last May 22, first Sep 26
- Hill Afb, UT 84056 · last Apr 22, first Oct 22
Frequently asked questions
- When is the last frost in Morgan, UT?
- For ZIP code 84050, the average last spring frost (32°F) is May 25, based on NOAA 1991-2020 climate normals for the Morgan, UT weather station. There is a 1-in-10 chance of a frost after June 13.
- When is the first frost in Morgan, UT?
- The average first fall frost (32°F) is September 24. There is a 1-in-10 chance of frost by September 11, so tender plants are at risk from that point on.
- How long is the growing season in 84050?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 119 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.