Frost dates for Sidney 1 S, Ohio
Half of years have their last spring frost by April 27, but 1 year in 10 still frosts after May 12.
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 12
- 1 year in 5
- May 6
- 3 years in 10
- May 3
- 2 years in 5
- April 30
- Half of years (the median)
- April 27
First fall freeze
How often the first freeze comes on or before each date.
- 1 year in 10
- October 5
- 1 year in 5
- October 10
- 3 years in 10
- October 14
- 2 years in 5
- October 18
- Half of years (the median)
- October 20
- Growing season
- about 175 days
- Hardiness zone nearby
- 6a
- 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 ~1 °C34 °F · low ~-8 °C18 °F · rain ~73 mm2.9 in
- February
- high ~4 °C38 °F · low ~-7 °C20 °F · rain ~59 mm2.3 in
- March
- high ~9 °C49 °F · low ~-2 °C28 °F · rain ~80 mm3.2 in
- April
- high ~17 °C62 °F · low ~3 °C38 °F · rain ~104 mm4.1 in
- May
- high ~23 °C73 °F · low ~10 °C49 °F · rain ~104 mm4.1 in
- June
- high ~27 °C81 °F · low ~15 °C59 °F · rain ~119 mm4.7 in
- July
- high ~29 °C84 °F · low ~17 °C62 °F · rain ~116 mm4.6 in
- August
- high ~28 °C83 °F · low ~15 °C60 °F · rain ~96 mm3.8 in
- September
- high ~26 °C78 °F · low ~11 °C53 °F · rain ~79 mm3.1 in
- October
- high ~18 °C65 °F · low ~5 °C42 °F · rain ~73 mm2.9 in
- November
- high ~11 °C51 °F · low ~0 °C31 °F · rain ~80 mm3.2 in
- December
- high ~4 °C40 °F · low ~-4 °C24 °F · rain ~74 mm2.9 in
Where these numbers come from
NOAA NCEI 1991–2020 Climate Normals, the Sidney 1 S station (listed by NOAA as Sidney 1 S, USC00337693), at 40.27, -84.15. 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
43070, 43343, 45302, 45306, 45308, 45312, 45317, 45318, 45326, 45328, 45333, 45334…
+18 moreShow fewer
45336, 45340, 45351, 45353, 45356, 45359, 45360, 45363, 45365, 45373, 45380, 45388, 45826, 45845, 45860, 45865, 45869, 45871.
Nearby stations
The nearest stations and how their last-frost dates compare. Together they show how frost varies across your area.
- Lima Wastewater Treatment Plant, OH, last frost by April 24
- Dayton Mcd, OH, last frost by April 18
- Eaton, OH, last frost by April 25
- Marysville, OH, last frost by April 19
- Cambridge City 3 N, IN, last frost by April 27
- Hoytville 2 NE, OH, last frost by April 24
Other stations in Ohio.
- Columbus-Valley Crossing, OH, last frost by April 23
- Milford, OH, last frost by April 23
- Cheviot 3 W, OH, last frost by April 16
- Fremont Ag Stn, OH, last frost by April 21
- Toledo Metcalf Field, OH, last frost by April 20
- New Lexington 2 NW, OH, last frost by April 30
- Wooster 3 SSE, OH, last frost by April 24
- Cleveland, OH, last frost by April 20
When do I plant? · Where the dates come from
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