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.
Every other site gives you one date. A frost date is not a date: it is a percentile from 30 years of records at a nearby weather station, and planting to the median means losing the crop in half of years. Both numbers are below, so you can choose the risk yourself.
The odds
Last spring frost
- Frost this late in 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
- Freeze this early in 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
Where these numbers come from
NOAA NCEI 1991–2020 Climate Normals, station 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 resolves the nearest station to your own ZIP and lowers its confidence with distance, rather than presenting one number as if it were measured in your yard.
Cold air also pools in low ground on the clear, still nights when frost happens, so a hollow can freeze while a slope a hundred metres away does not. No table can know that about your garden. Your own logged frosts eventually can.
ZIP codes nearest this station
43070, 43072, 43343, 45302, 45306, 45308, 45312, 45317, 45318, 45326, 45328, 45333, 45334, 45336, 45340, 45351, 45353, 45356, 45359, 45360, 45363, 45365, 45373, 45380, 45388, 45389, 45826, 45845, 45860, 45865, 45869, 45871.
What can I plant here, and when? →
Nearby stations
The nearest stations, and how their last-frost dates compare — the frost gradient across your area, which no single station shows.
- Lima Wwtp, 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 Hcn, IN — last frost by April 27
- Hoytville 2 Ne, OH — last frost by April 24
Other stations in Ohio.
- Milford, OH — last frost by April 23
- Cheviot 3 W, OH — last frost by April 16
- Lancaster Fairfield Ap, OH — last frost by April 26
- Fremont Ag Stn, OH — last frost by April 21
- New Lexington 2 Nw, OH — last frost by April 30
- Wooster 3 Sse, OH — last frost by April 24
- Carpenter 2 S, OH — last frost by April 27
- Cleveland, OH — last frost by April 20