Last frost date in Flint, MI
Expect the last frost in Flint around May 3. Frost after May 20 happens in only one year out of ten. The first fall frost usually arrives about October 13, which leaves 162 frost-free days. An early freeze before September 30 happens one year in ten.
- Safe after (10% risk)
- May 20
- Average first frost
- Oct 13
- Frost-free season
- 162 days
- Hard freeze (28°F) ends
- Apr 22
No frost in the next 7 nights
Later than usual: the average first frost here is October 13.
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2243°
- FriOct 2342°
- SatOct 2446°
- SunOct 2548°
- MonOct 2644°
- TueOct 2740°
- WedOct 2843°
Planting calendar for Flint
Windows count forward or back from the average frost dates above. Click a crop for dates across Michigan.
TomatoesMay 10–May 24
PumpkinsMay 17–May 31
SunflowersMay 3–May 24
CucumbersMay 17–May 24
CornMay 10–May 24
Sweet potatoesMay 24–Jun 7
WatermelonMay 17–May 31
Green beansMay 10–May 31
ZucchiniMay 10–May 24
OkraMay 24–Jun 7
PeppersMay 17–May 31
BasilMay 10–May 24
Butternut squashMay 10–May 24
CantaloupeMay 17–May 31
EggplantMay 17–May 31
PotatoesApr 5–Apr 19
OnionsMar 22–Apr 12
CarrotsApr 12–May 17
LettuceApr 19–May 10
BroccoliApr 5–Apr 19
BeetsApr 5–May 17
PeasMar 22–Apr 5
CabbageApr 5–Apr 19
RadishesMar 29–May 10
Brussels sproutsApr 19–May 3
SpinachMar 22–Apr 12
CilantroApr 19–May 10
KaleApr 5–Apr 19
Collard greensApr 5–Apr 19
TurnipsApr 5–Apr 19
DillMay 3–May 17
CeleryMay 10–May 17
CauliflowerApr 19–May 3
LeeksApr 19–May 3
Swiss chardApr 19–May 17
ParsleyApr 19–May 10
Tulip bulbsSep 29–Nov 3
GarlicSep 22–Oct 27
Daffodil bulbsSep 15–Oct 27
StrawberriesApr 5–Apr 19
AsparagusApr 5–Apr 19Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Apr 20 | May 3 | May 20 | Sep 30 | Oct 13 | Oct 27 |
| Hard freeze, 28°F | Apr 8 | Apr 22 | May 9 | Oct 12 | Oct 27 | Nov 9 |
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 Flint 7W (USC00202851) sits 4.0 miles from the center of Flint at 679 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 Flint, MI?
The average last frost date in Flint is May 3, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after May 20.
When is the first frost in Flint?
The first frost in fall usually comes around October 13. One year in ten it arrives before September 30.
How long is the growing season in Flint?
About 162 days between the average last and first frost.
When should I plant tomatoes in Flint?
Plant tomato seedlings outside from May 10 to May 24. Start seeds indoors six to eight weeks earlier.
Nearby in Michigan
- BurtonMay 8
- SaginawApr 29
- PontiacApr 26
- Auburn HillsApr 26
- Rochester HillsApr 26
- NoviMay 1
- Bay CityApr 27
- Farmington HillsMay 1
- BirminghamApr 26
- TroyApr 26
- OkemosApr 28
- SouthfieldMay 1