Frost dates for 84058Orem, UT
The average last spring frost in Orem is April 18 and the average first fall frost is October 21, giving a typical growing season of about 185 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 18
- Average first fall frost
- Oct 21
- Growing season
- 185 days
Safer after May 5 (1-in-10 risk)
Possible by Oct 7 (1-in-10 risk)
Last frost typically in 173 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 19 · May 3 · May 21 | Sep 28 · Oct 10 · Oct 22 | 159 days | 100% |
| Frost / freeze (32°F) | Mar 31 · Apr 18 · May 5 | Oct 7 · Oct 21 · Nov 4 | 185 days | 100% |
| Hard freeze (28°F) | Mar 8 · Mar 31 · Apr 17 | Oct 19 · Nov 1 · Nov 15 | 216 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 | Mar 18 – May 24 |
| Tomatoes | Transplant outdoors | May 4 – Jul 1 |
| Peppers | Start seeds indoors | Mar 18 – Apr 18 |
| Peppers | Transplant outdoors | May 18 – Jun 18 |
| Eggplant | Start seeds indoors | Apr 4 – May 3 |
| Eggplant | Transplant outdoors | May 18 – Jun 18 |
| Cucumbers | Sow outdoors | May 18 – Jul 11 |
| Summer squash | Sow outdoors | May 4 – Jun 18 |
| Winter squash & pumpkins | Sow outdoors | May 18 – Jun 18 |
| Snap beans | Sow outdoors | May 4 – Aug 3 |
| Sweet corn | Sow outdoors | May 4 – Jul 1 |
| Watermelon & cantaloupe | Sow outdoors | May 18 – Jun 18 |
| Okra | Sow outdoors | May 11 – Jun 3 |
| Peas | Sow outdoors (spring) | Mar 18 – May 3 |
| Potatoes | Plant outdoors (spring) | Mar 18 – May 18 |
| Onions | Start seeds indoors (spring) | Feb 4 – Mar 3 |
| Onions | Transplant outdoors (spring) | Apr 4 – May 3 |
| Broccoli | Start seeds indoors (spring) | Feb 28 – Apr 3 |
| Broccoli | Transplant outdoors (spring) | Apr 4 – May 3 |
| Broccoli | Start seeds indoors (fall) | Jun 21 – Jul 1 |
| Broccoli | Transplant outdoors (fall) | Jul 21 – Aug 1 |
| Cabbage | Start seeds indoors (spring) | Feb 18 – Mar 18 |
| Cabbage | Transplant outdoors (spring) | Mar 18 – Apr 18 |
| Cabbage | Start seeds indoors (fall) | Jun 11 – Jul 11 |
| Cabbage | Transplant outdoors (fall) | Jul 11 – Aug 11 |
| Leaf lettuce | Sow outdoors (spring) | Mar 18 – Jun 3 |
| Leaf lettuce | Sow outdoors (fall) | Jul 11 – Aug 27 |
| Spinach | Sow outdoors (spring) | Mar 11 – Apr 24 |
| Spinach | Sow outdoors (fall) | Jul 28 – Sep 1 |
| Radishes | Sow outdoors (spring) | Mar 18 – May 8 |
| Radishes | Sow outdoors (fall) | Jul 11 – Sep 11 |
| Kale | Sow outdoors (spring) | Apr 4 – Apr 24 |
| Kale | Sow outdoors (fall) | Jul 4 – Aug 11 |
| Carrots | Sow outdoors (spring) | Apr 18 – Jun 3 |
| Carrots | Sow outdoors (fall) | Jun 11 – Jul 27 |
| Garlic | Plant outdoors (fall) | Oct 11 – Nov 11 |
Where these dates come from
ZIP code 84058 is matched to the NOAA station Provo Byu, UT, 7.2 km away, at 4,570 ft elevation (17 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Provo Byu, UT (used) | 4,570 ft | Apr 18 | Oct 21 |
| Orem Trtmt Plt, UT | 4,510 ft | Apr 19 | Oct 19 |
| Pleasant Grove, UT | 4,692 ft | Apr 17 | Oct 25 |
| Sundance, UT | 6,620 ft | May 17 | Oct 5 |
Frost dates near Orem
- Orem, UT 84057 · last Apr 17, first Oct 25
- Provo, UT 84604 · last Apr 18, first Oct 21
- Lindon, UT 84042 · last Apr 17, first Oct 25
- Pleasant Grove, UT 84062 · last Apr 17, first Oct 25
- American Fork, UT 84003 · last Apr 17, first Oct 25
- Lehi, UT 84043 · last Apr 18, first Oct 22
- Springville, UT 84663 · last Apr 18, first Oct 21
- Saratoga Springs, UT 84045 · last Apr 18, first Oct 22
Frequently asked questions
- When is the last frost in Orem, UT?
- For ZIP code 84058, the average last spring frost (32°F) is April 18, based on NOAA 1991-2020 climate normals for the Provo Byu, UT weather station. There is a 1-in-10 chance of a frost after May 5.
- When is the first frost in Orem, UT?
- The average first fall frost (32°F) is October 21. There is a 1-in-10 chance of frost by October 7, so tender plants are at risk from that point on.
- How long is the growing season in 84058?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 185 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.