Last frost date in St. Paul, MN

Average last frost
April 24

Expect the last frost in St. Paul around April 24. Frost after May 10 happens in only one year out of ten. The first fall frost usually arrives about October 16, which leaves 174 frost-free days. An early freeze before October 2 happens one year in ten.

Safe after (10% risk)
May 10
Average first frost
Oct 16
Frost-free season
174 days
Hard freeze (28°F) ends
Apr 13
Next 7 nights in St. Paul

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

  1. ThuOct 2254°
  2. FriOct 2361°
  3. SatOct 2449°
  4. SunOct 2544°
  5. MonOct 2640°
  6. TueOct 2741°
  7. WedOct 2843°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost Apr 24First frost Oct 16174 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND174 frost-free days
Frost risk through the year at St Paul Downtown Airport, 2.6 miles from St. Paul.

Planting calendar for St. Paul

Windows count forward or back from the average frost dates above. Click a crop for dates across Minnesota.

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
Warm-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
TomatoesMay 1–May 15
PumpkinsMay 8–May 22
SunflowersApr 24–May 15
CucumbersMay 8–May 15
CornMay 1–May 15
Sweet potatoesMay 15–May 29
WatermelonMay 8–May 22
Green beansMay 1–May 22
ZucchiniMay 1–May 15
OkraMay 15–May 29
PeppersMay 8–May 22
BasilMay 1–May 15
Butternut squashMay 1–May 15
CantaloupeMay 8–May 22
EggplantMay 8–May 22
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesMar 27–Apr 10
OnionsMar 13–Apr 3
CarrotsApr 3–May 8
LettuceApr 10–May 1
BroccoliMar 27–Apr 10
BeetsMar 27–May 8
PeasMar 13–Mar 27
CabbageMar 27–Apr 10
RadishesMar 20–May 1
Brussels sproutsApr 10–Apr 24
SpinachMar 13–Apr 3
CilantroApr 10–May 1
KaleMar 27–Apr 10
Collard greensMar 27–Apr 10
TurnipsMar 27–Apr 10
DillApr 24–May 8
CeleryMay 1–May 8
CauliflowerApr 10–Apr 24
LeeksApr 10–Apr 24
Swiss chardApr 10–May 8
ParsleyApr 10–May 1
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsOct 2–Nov 6
GarlicSep 25–Oct 30
Daffodil bulbsSep 18–Oct 30
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesMar 27–Apr 10
AsparagusMar 27–Apr 10

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FApr 9Apr 24May 10Oct 2Oct 16Oct 29
Hard freeze, 28°FApr 1Apr 13Apr 28Oct 11Oct 27Nov 8

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 St Paul Downtown Airport (USW00014927) sits 2.6 miles from the center of St. Paul at 700 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 St. Paul, MN?

The average last frost date in St. Paul is April 24, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after May 10.

When is the first frost in St. Paul?

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 St. Paul?

About 174 days between the average last and first frost.

When should I plant tomatoes in St. Paul?

Plant tomato seedlings outside from May 1 to May 15. Start seeds indoors six to eight weeks earlier.

Nearby in Minnesota

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