Frost dates for 84049Midway, UT
The average last spring frost in Midway is June 4 and the average first fall frost is September 20, giving a typical growing season of about 106 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Jun 4
- Average first fall frost
- Sep 20
- Growing season
- 106 days
Safer after Jun 21 (1-in-10 risk)
Possible by Sep 6 (1-in-10 risk)
Last frost typically in 220 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) | Jun 5 · Jun 19 · Jul 2 | Aug 28 · Sep 9 · Sep 21 | 80 days | 100% |
| Frost / freeze (32°F) | May 18 · Jun 4 · Jun 21 | Sep 6 · Sep 20 · Oct 1 | 106 days | 100% |
| Hard freeze (28°F) | May 1 · May 17 · Jun 8 | Sep 17 · Oct 1 · Oct 15 | 134 days | 100% |
Planting calendar for Midway
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 | May 4 – Jul 10 |
| Tomatoes | Transplant outdoors | Jun 20 – May 31 |
| Peppers | Start seeds indoors | May 4 – Jun 4 |
| Peppers | Transplant outdoors | Jul 4 – Aug 4 |
| Eggplant | Start seeds indoors | May 21 – Jun 19 |
| Eggplant | Transplant outdoors | Jul 4 – Aug 4 |
| Cucumbers | Sow outdoors | Jul 4 – Jun 10 |
| Summer squash | Sow outdoors | Jun 20 – Aug 4 |
| Winter squash & pumpkins | Sow outdoors | Jul 4 – Aug 4 |
| Snap beans | Sow outdoors | Jun 20 – Jul 3 |
| Sweet corn | Sow outdoors | Jun 20 – May 31 |
| Watermelon & cantaloupe | Sow outdoors | Jul 4 – Aug 4 |
| Okra | Sow outdoors | Jun 27 – Jul 20 |
| Peas | Sow outdoors (spring) | May 4 – Jun 19 |
| Potatoes | Plant outdoors (spring) | May 4 – Jul 4 |
| Onions | Start seeds indoors (spring) | Mar 23 – Apr 19 |
| Onions | Transplant outdoors (spring) | May 21 – Jun 19 |
| Broccoli | Start seeds indoors (spring) | Apr 16 – May 20 |
| Broccoli | Transplant outdoors (spring) | May 21 – Jun 19 |
| Broccoli | Start seeds indoors (fall) | May 21 – May 31 |
| Broccoli | Transplant outdoors (fall) | Jun 20 – Jul 1 |
| Cabbage | Start seeds indoors (spring) | Apr 6 – May 4 |
| Cabbage | Transplant outdoors (spring) | May 4 – Jun 4 |
| Cabbage | Start seeds indoors (fall) | May 11 – Jun 10 |
| Cabbage | Transplant outdoors (fall) | Jun 10 – Jul 11 |
| Leaf lettuce | Sow outdoors (spring) | May 4 – Jul 20 |
| Leaf lettuce | Sow outdoors (fall) | Jun 10 – Jul 27 |
| Spinach | Sow outdoors (spring) | Apr 27 – Jun 10 |
| Spinach | Sow outdoors (fall) | Jun 27 – Aug 1 |
| Radishes | Sow outdoors (spring) | May 4 – Jun 24 |
| Radishes | Sow outdoors (fall) | Jun 10 – Aug 11 |
| Kale | Sow outdoors (spring) | May 21 – Jun 10 |
| Kale | Sow outdoors (fall) | Jun 3 – Jul 11 |
| Carrots | Sow outdoors (spring) | Jun 4 – Jul 20 |
| Carrots | Sow outdoors (fall) | May 11 – Jun 26 |
| Garlic | Plant outdoors (fall) | Sep 10 – Oct 11 |
Where these dates come from
ZIP code 84049 is matched to the NOAA station Heber, UT, 4.8 km away, at 5,590 ft elevation (32 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Heber, UT (used) | 5,590 ft | Jun 4 | Sep 20 |
| Snake Creek Powerhouse, UT | 6,010 ft | May 31 | Sep 11 |
| Deer Creek Dam, UT | 5,270 ft | May 28 | Sep 23 |
| Silver Lake Brighton, UT | 8,741 ft | — | — |
Frost dates near Midway
- Heber City, UT 84032 · last Jun 4, first Sep 20
- Wallsburg, UT 84082 · last May 17, first Oct 5
- Park City, UT 84060 · last May 29, first Sep 25
- Kamas, UT 84036 · last Jun 5, first Sep 17
- Sandy, UT 84092 · last Jun 11, first Sep 18
- Alpine, UT 84004 · last May 3, first Oct 12
- Pleasant Grove, UT 84062 · last Apr 17, first Oct 25
- Peoa, UT 84061 · last Jun 11, first Sep 12
Frequently asked questions
- When is the last frost in Midway, UT?
- For ZIP code 84049, the average last spring frost (32°F) is June 4, based on NOAA 1991-2020 climate normals for the Heber, UT weather station. There is a 1-in-10 chance of a frost after June 21.
- When is the first frost in Midway, UT?
- The average first fall frost (32°F) is September 20. There is a 1-in-10 chance of frost by September 6, so tender plants are at risk from that point on.
- How long is the growing season in 84049?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 106 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.