Frost dates for 84059Orem, UT
The average last spring frost in Orem is May 17 and the average first fall frost is October 5, giving a typical growing season of about 138 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 17
- Average first fall frost
- Oct 5
- Growing season
- 138 days
Safer after Jun 8 (1-in-10 risk)
Possible by Sep 22 (1-in-10 risk)
Last frost typically in 195 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 16 · Jun 1 · Jun 17 | Sep 11 · Sep 25 · Oct 7 | 115 days | 100% |
| Frost / freeze (32°F) | May 1 · May 17 · Jun 8 | Sep 22 · Oct 5 · Oct 19 | 138 days | 100% |
| Hard freeze (28°F) | Apr 17 · May 2 · May 25 | Oct 2 · Oct 17 · Oct 30 | 164 days | 100% |
Planting calendar for Orem
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 16 – Jun 22 |
| Tomatoes | Transplant outdoors | Jun 2 – Jun 15 |
| Peppers | Start seeds indoors | Apr 16 – May 17 |
| Peppers | Transplant outdoors | Jun 16 – Jul 17 |
| Eggplant | Start seeds indoors | May 3 – Jun 1 |
| Eggplant | Transplant outdoors | Jun 16 – Jul 17 |
| Cucumbers | Sow outdoors | Jun 16 – Jun 25 |
| Summer squash | Sow outdoors | Jun 2 – Jul 17 |
| Winter squash & pumpkins | Sow outdoors | Jun 16 – Jul 17 |
| Snap beans | Sow outdoors | Jun 2 – Jul 18 |
| Sweet corn | Sow outdoors | Jun 2 – Jun 15 |
| Watermelon & cantaloupe | Sow outdoors | Jun 16 – Jul 17 |
| Okra | Sow outdoors | Jun 9 – Jul 2 |
| Peas | Sow outdoors (spring) | Apr 16 – Jun 1 |
| Potatoes | Plant outdoors (spring) | Apr 16 – Jun 16 |
| Onions | Start seeds indoors (spring) | Mar 5 – Apr 1 |
| Onions | Transplant outdoors (spring) | May 3 – Jun 1 |
| Broccoli | Start seeds indoors (spring) | Mar 29 – May 2 |
| Broccoli | Transplant outdoors (spring) | May 3 – Jun 1 |
| Broccoli | Start seeds indoors (fall) | Jun 5 – Jun 15 |
| Broccoli | Transplant outdoors (fall) | Jul 5 – Jul 16 |
| Cabbage | Start seeds indoors (spring) | Mar 19 – Apr 16 |
| Cabbage | Transplant outdoors (spring) | Apr 16 – May 17 |
| Cabbage | Start seeds indoors (fall) | May 26 – Jun 25 |
| Cabbage | Transplant outdoors (fall) | Jun 25 – Jul 26 |
| Leaf lettuce | Sow outdoors (spring) | Apr 16 – Jul 2 |
| Leaf lettuce | Sow outdoors (fall) | Jun 25 – Aug 11 |
| Spinach | Sow outdoors (spring) | Apr 9 – May 23 |
| Spinach | Sow outdoors (fall) | Jul 12 – Aug 16 |
| Radishes | Sow outdoors (spring) | Apr 16 – Jun 6 |
| Radishes | Sow outdoors (fall) | Jun 25 – Aug 26 |
| Kale | Sow outdoors (spring) | May 3 – May 23 |
| Kale | Sow outdoors (fall) | Jun 18 – Jul 26 |
| Carrots | Sow outdoors (spring) | May 17 – Jul 2 |
| Carrots | Sow outdoors (fall) | May 26 – Jul 11 |
| Garlic | Plant outdoors (fall) | Sep 25 – Oct 26 |
Where these dates come from
ZIP code 84059 is matched to the NOAA station Sundance, UT, 24.1 km away, at 6,620 ft elevation (654 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Sundance, UT (used) | 6,620 ft | May 17 | Oct 5 |
| Spanish Fk Pwr House, UT | 4,720 ft | Apr 25 | Oct 18 |
| Provo Byu, UT | 4,570 ft | Apr 18 | Oct 21 |
| Orem Trtmt Plt, UT | 4,510 ft | Apr 19 | Oct 19 |
Frost dates near Orem
- Provo, UT 84605 · last May 17, first Oct 5
- Springville, UT 84663 · last Apr 18, first Oct 21
- Mapleton, UT 84664 · last Apr 25, first Oct 18
- Spanish Fork, UT 84660 · last Apr 25, first Oct 18
- Orem, UT 84097 · last Apr 17, first Oct 25
- Salem, UT 84653 · last May 17, first Oct 5
- Wallsburg, UT 84082 · last May 17, first Oct 5
- Payson, UT 84651 · last Apr 25, first Oct 18
Frequently asked questions
- When is the last frost in Orem, UT?
- For ZIP code 84059, the average last spring frost (32°F) is May 17, based on NOAA 1991-2020 climate normals for the Sundance, UT weather station. There is a 1-in-10 chance of a frost after June 8.
- When is the first frost in Orem, UT?
- The average first fall frost (32°F) is October 5. There is a 1-in-10 chance of frost by September 22, so tender plants are at risk from that point on.
- How long is the growing season in 84059?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 138 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.