Last frost date in Eagle Mountain, UT
Expect the last frost in Eagle Mountain around June 2. Frost after June 24 happens in only one year out of ten. The first fall frost usually arrives about September 16, which leaves 103 frost-free days. An early freeze before September 1 happens one year in ten.
- Safe after (10% risk)
- Jun 24
- Average first frost
- Sep 16
- Frost-free season
- 103 days
- Hard freeze (28°F) ends
- May 19
Frost possible in low spots Sun night, low 36°F
National Weather Service forecast, updated Oct 22, 12:24 UTC
- ThuOct 2244°
- FriOct 2338°
- SatOct 2437°
- SunOct 2536°possible frost
- MonOct 2637°
- TueOct 2737°
- WedOct 2840°
Planting calendar for Eagle Mountain
Windows count forward or back from the average frost dates above. Click a crop for dates across Utah.
TomatoesJun 9–Jun 23
PumpkinsJun 16–Jun 30
SunflowersJun 2–Jun 23
CucumbersJun 16–Jun 23
CornJun 9–Jun 23
Sweet potatoesJun 23–Jul 7
WatermelonJun 16–Jun 30
Green beansJun 9–Jun 30
ZucchiniJun 9–Jun 23
OkraJun 23–Jul 7
PeppersJun 16–Jun 30
BasilJun 9–Jun 23
Butternut squashJun 9–Jun 23
CantaloupeJun 16–Jun 30
EggplantJun 16–Jun 30
PotatoesMay 5–May 19
OnionsApr 21–May 12
CarrotsMay 12–Jun 16
LettuceMay 19–Jun 9
BroccoliMay 5–May 19
BeetsMay 5–Jun 16
PeasApr 21–May 5
CabbageMay 5–May 19
RadishesApr 28–Jun 9
Brussels sproutsMay 19–Jun 2
SpinachApr 21–May 12
CilantroMay 19–Jun 9
KaleMay 5–May 19
Collard greensMay 5–May 19
TurnipsMay 5–May 19
DillJun 2–Jun 16
CeleryJun 9–Jun 16
CauliflowerMay 19–Jun 2
LeeksMay 19–Jun 2
Swiss chardMay 19–Jun 16
ParsleyMay 19–Jun 9
Tulip bulbsSep 2–Oct 7
GarlicAug 26–Sep 30
Daffodil bulbsAug 19–Sep 30
StrawberriesMay 5–May 19
AsparagusMay 5–May 19The frost-free season here is short for pumpkins, sunflowers, corn, sweet potatoes, watermelon, peppers, butternut squash, cantaloupe. Start them indoors and look for early varieties.
Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | May 18 | Jun 2 | Jun 24 | Sep 1 | Sep 16 | Sep 29 |
| Hard freeze, 28°F | May 2 | May 19 | Jun 10 | Sep 10 | Sep 26 | Oct 7 |
Read the spring 10% column as the date after which only one year in ten still gets frost. That is the safer date for tomatoes, peppers and basil.
Where these numbers come from
NOAA station Fairfield (USC00422696) sits 5.5 miles from the center of Eagle Mountain at 4,880 feet. Its averages cover 1991 to 2020. Low spots, valleys and open fields can keep getting frost a week or two after the station stops; city centers and lakeshores usually get less of it.
Questions
When is the last frost in Eagle Mountain, UT?
The average last frost date in Eagle Mountain is June 2, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after June 24.
When is the first frost in Eagle Mountain?
The first frost in fall usually comes around September 16. One year in ten it arrives before September 1.
How long is the growing season in Eagle Mountain?
About 103 days between the average last and first frost.
When should I plant tomatoes in Eagle Mountain?
Plant tomato seedlings outside from June 9 to June 23. Start seeds indoors six to eight weeks earlier.
Nearby in Utah
- Saratoga SpringsApr 30
- LehiApr 30
- American ForkApr 17
- HerrimanApr 18
- HighlandMay 3
- RivertonApr 18
- Pleasant GroveApr 17
- DraperApr 18
- OremApr 19
- South JordanApr 18
- SandyApr 29
- ProvoApr 18