Last frost date in Forest Lake, MN
The average last frost in Forest Lake is May 3. By May 19 the chance of another 32°F night drops to 1 in 10. The first fall frost usually arrives about October 5, which leaves 154 frost-free days. An early freeze before September 22 happens one year in ten.
- Safe after (10% risk)
- May 19
- Average first frost
- Oct 5
- Frost-free season
- 154 days
- Hard freeze (28°F) ends
- Apr 24
No frost in the next 7 nights
Later than usual: the average first frost here is October 5.
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2253°
- FriOct 2359°
- SatOct 2447°
- SunOct 2541°
- MonOct 2637°
- TueOct 2738°
- WedOct 2840°
Planting calendar for Forest Lake
Windows count forward or back from the average frost dates above. Click a crop for dates across Minnesota.
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 21–Oct 26
GarlicSep 14–Oct 19
Daffodil bulbsSep 7–Oct 19
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 19 | Sep 22 | Oct 5 | Oct 20 |
| Hard freeze, 28°F | Apr 10 | Apr 24 | May 6 | Oct 1 | Oct 17 | Nov 1 |
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 Forest Lake 5NE (USC00212881) sits 6.5 miles from the center of Forest Lake at 905 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 Forest Lake, MN?
The average last frost date in Forest Lake is May 3, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after May 19.
When is the first frost in Forest Lake?
The first frost in fall usually comes around October 5. One year in ten it arrives before September 22.
How long is the growing season in Forest Lake?
About 154 days between the average last and first frost.
When should I plant tomatoes in Forest Lake?
Plant tomato seedlings outside from May 10 to May 24. Start seeds indoors six to eight weeks earlier.
Nearby in Minnesota
- Lino LakesApr 23
- BlaineMay 5
- White Bear LakeApr 23
- ShoreviewApr 23
- MaplewoodApr 23
- New BrightonApr 28
- Coon RapidsMay 5
- AndoverMay 5
- OakdaleApr 26
- FridleyApr 30
- RosevilleApr 28
- Columbia HeightsApr 23