Frost dates for Dennison Wtr Wks, Ohio
Half of years have their last spring frost by April 29, but 1 year in 10 still frosts after May 17.
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
- May 17
- 1 year in 5
- May 10
- 3 years in 10
- May 5
- 2 years in 5
- May 1
- Half of years (the median)
- April 29
First fall freeze
How often the first freeze comes on or before each date.
- 1 year in 10
- October 2
- 1 year in 5
- October 6
- 3 years in 10
- October 9
- 2 years in 5
- October 12
- Half of years (the median)
- October 15
- Growing season
- about 170 days
- Hardiness zones nearby
- 6a, 6b
- Summer days
- a usual high of about 28 °C83 °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 ~2 °C36 °F · low ~-7 °C20 °F · rain ~80 mm3.1 in
- February
- high ~4 °C40 °F · low ~-6 °C21 °F · rain ~64 mm2.5 in
- March
- high ~10 °C50 °F · low ~-2 °C28 °F · rain ~90 mm3.5 in
- April
- high ~17 °C63 °F · low ~3 °C38 °F · rain ~99 mm3.9 in
- May
- high ~23 °C73 °F · low ~9 °C48 °F · rain ~96 mm3.8 in
- June
- high ~27 °C81 °F · low ~14 °C57 °F · rain ~112 mm4.4 in
- July
- high ~29 °C85 °F · low ~16 °C61 °F · rain ~105 mm4.1 in
- August
- high ~28 °C83 °F · low ~15 °C59 °F · rain ~103 mm4.1 in
- September
- high ~25 °C76 °F · low ~11 °C52 °F · rain ~86 mm3.4 in
- October
- high ~18 °C64 °F · low ~5 °C41 °F · rain ~83 mm3.3 in
- November
- high ~11 °C51 °F · low ~0 °C32 °F · rain ~79 mm3.1 in
- December
- high ~5 °C40 °F · low ~-4 °C25 °F · rain ~79 mm3.1 in
Where these numbers come from
NOAA NCEI 1991–2020 Climate Normals, the Dennison Wtr Wks station (listed by NOAA as Dennison Wtr Wks, USC00332160), at 40.41, -81.34. 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
43736, 43837, 43840, 43973, 43983, 43985, 43986, 43988, 44612, 44615, 44620, 44621…
+17 moreShow fewer
44622, 44629, 44643, 44653, 44656, 44663, 44671, 44675, 44678, 44680, 44681, 44682, 44683, 44693, 44695, 44697, 44699.
Nearby stations
The nearest stations and how their last-frost dates compare. Together they show how frost varies across your area.
- Akron Canton Regional Airport, OH, last frost by April 24
- Millport 4 NE, OH, last frost by May 2
- Wooster 3 SSE, OH, last frost by April 24
- Caldwell 3 SE, OH, last frost by April 30
- Ravenna 2 S, OH, last frost by April 21
- Stow 4 SE, OH, last frost by April 30
Other stations in Ohio.
- New Lexington 2 NW, OH, last frost by April 30
- Cleveland, OH, last frost by April 20
- Cleveland Burke Airport, OH, last frost by April 8
- Columbus-Valley Crossing, OH, last frost by April 23
- Marysville, OH, last frost by April 19
- Fremont Ag Stn, OH, last frost by April 21
- Toledo Metcalf Field, OH, last frost by April 20
- Hoytville 2 NE, OH, last frost by April 24
When do I plant? · Where the dates come from
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