Frost dates for Greenville 2 NNE, Michigan
Half of years have their last spring frost by May 18, but 1 year in 10 still frosts after June 3.
A frost date is really a percentile from 30 years of records at a nearby weather station: in about half of years a frost still comes after the median date. Both numbers are below, so you can choose the risk yourself.
The odds
Last spring frost
How often a frost still comes on or after each date.
- 1 year in 10
- June 3
- 1 year in 5
- May 29
- 3 years in 10
- May 25
- 2 years in 5
- May 22
- Half of years (the median)
- May 18
First fall freeze
How often the first freeze comes on or before each date.
- 1 year in 10
- September 15
- 1 year in 5
- September 20
- 3 years in 10
- September 23
- 2 years in 5
- September 26
- Half of years (the median)
- September 28
- Growing season
- about 133 days
- Hardiness zones nearby
- 5b, 6a
- Summer days
- a usual high of about 28 °C82 °F
- Lettuce and spinach run to seed
- June to September, in hot, long days (how we know)
Summer and rain
A growing garden needs about 25 mm1 in of water a week, rain and watering together. Here is what a normal month brings.
Month by month
- January
- high ~0 °C31 °F · low ~-11 °C13 °F · rain ~57 mm2.2 in
- February
- high ~1 °C34 °F · low ~-10 °C13 °F · rain ~49 mm1.9 in
- March
- high ~8 °C46 °F · low ~-6 °C22 °F · rain ~62 mm2.4 in
- April
- high ~15 °C59 °F · low ~0 °C32 °F · rain ~99 mm3.9 in
- May
- high ~22 °C71 °F · low ~6 °C44 °F · rain ~103 mm4.1 in
- June
- high ~27 °C80 °F · low ~11 °C53 °F · rain ~92 mm3.6 in
- July
- high ~29 °C84 °F · low ~14 °C56 °F · rain ~78 mm3.1 in
- August
- high ~28 °C82 °F · low ~13 °C55 °F · rain ~89 mm3.5 in
- September
- high ~24 °C75 °F · low ~9 °C47 °F · rain ~77 mm3 in
- October
- high ~17 °C62 °F · low ~3 °C37 °F · rain ~90 mm3.5 in
- November
- high ~9 °C48 °F · low ~-3 °C27 °F · rain ~76 mm3 in
- December
- high ~2 °C36 °F · low ~-7 °C19 °F · rain ~60 mm2.4 in
Where these numbers come from
NOAA NCEI 1991–2020 Climate Normals, the Greenville 2 NNE station (listed by NOAA as Greenville 2 NNE, USC00203429), at 43.20, -85.24. These are that station’s own records, unshifted. The further your garden is from it, the less exactly they describe your ground. The planner finds the nearest station to your garden and lowers its confidence with distance, so no number is presented as if it were measured in your garden.
Cold air also pools in low ground on the clear, still nights when frost happens, so a hollow can freeze while a slope a few hundred feet away does not. No table can know that about your garden. A few seasons of your own logged frosts can.
ZIP codes nearest this station
48809, 48829, 48834, 48838, 48850, 48852, 48884, 48885, 48886, 48888, 49322, 49326…
+4 moreShow fewer
49329, 49339, 49341, 49347.
Nearby stations
The nearest stations and how their last-frost dates compare. Together they show how frost varies across your area.
- Kent City 2 SW, MI, last frost by May 14
- Jackson Reynolds Field, MI, last frost by May 1
- Linden Wastewater Treatment Plant, MI, last frost by May 3
Other stations in Michigan.
- Pontiac Wastewater Treatment Plant, MI, last frost by April 26
- Dearborn, MI, last frost by May 1
- Detroit City Airport, MI, last frost by April 21
- Grosse Pointe Farms, MI, last frost by April 29
When do I plant? · Where the dates come from
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