Last frost date in Tooele, UT
The average last frost in Tooele is May 2. By May 28 the chance of another 32°F night drops to 1 in 10. The first fall frost usually arrives about October 16, which leaves 165 frost-free days. An early freeze before October 2 happens one year in ten.
- Safe after (10% risk)
- May 28
- Average first frost
- Oct 16
- Frost-free season
- 165 days
- Hard freeze (28°F) ends
- Apr 16
No frost in the next 7 nights
Later than usual: the average first frost here is October 16.
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2248°
- FriOct 2343°
- SatOct 2442°
- SunOct 2541°
- MonOct 2643°
- TueOct 2742°
- WedOct 2845°
Planting calendar for Tooele
Windows count forward or back from the average frost dates above. Click a crop for dates across Utah.
TomatoesMay 9–May 23
PumpkinsMay 16–May 30
SunflowersMay 2–May 23
CucumbersMay 16–May 23
CornMay 9–May 23
Sweet potatoesMay 23–Jun 6
WatermelonMay 16–May 30
Green beansMay 9–May 30
ZucchiniMay 9–May 23
OkraMay 23–Jun 6
PeppersMay 16–May 30
BasilMay 9–May 23
Butternut squashMay 9–May 23
CantaloupeMay 16–May 30
EggplantMay 16–May 30
PotatoesApr 4–Apr 18
OnionsMar 21–Apr 11
CarrotsApr 11–May 16
LettuceApr 18–May 9
BroccoliApr 4–Apr 18
BeetsApr 4–May 16
PeasMar 21–Apr 4
CabbageApr 4–Apr 18
RadishesMar 28–May 9
Brussels sproutsApr 18–May 2
SpinachMar 21–Apr 11
CilantroApr 18–May 9
KaleApr 4–Apr 18
Collard greensApr 4–Apr 18
TurnipsApr 4–Apr 18
DillMay 2–May 16
CeleryMay 9–May 16
CauliflowerApr 18–May 2
LeeksApr 18–May 2
Swiss chardApr 18–May 16
ParsleyApr 18–May 9
Tulip bulbsOct 2–Nov 6
GarlicSep 25–Oct 30
Daffodil bulbsSep 18–Oct 30
StrawberriesApr 4–Apr 18
AsparagusApr 4–Apr 18Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Apr 16 | May 2 | May 28 | Oct 2 | Oct 16 | Nov 2 |
| Hard freeze, 28°F | Mar 29 | Apr 16 | May 7 | Oct 13 | Oct 27 | Nov 12 |
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 Tooele (USC00428771) sits 0.8 miles from the center of Tooele at 4,944 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 Tooele, UT?
The average last frost date in Tooele is May 2, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after May 28.
When is the first frost in Tooele?
The first frost in fall usually comes around October 16. One year in ten it arrives before October 2.
How long is the growing season in Tooele?
About 165 days between the average last and first frost.
When should I plant tomatoes in Tooele?
Plant tomato seedlings outside from May 9 to May 23. Start seeds indoors six to eight weeks earlier.
Nearby in Utah
- HerrimanApr 18
- MagnaApr 3
- South JordanApr 18
- West JordanApr 18
- KearnsApr 8
- RivertonApr 18
- West Valley CityApr 8
- TaylorsvilleMar 31
- Eagle MountainJun 2
- MidvaleApr 29
- MurrayApr 29
- DraperApr 18