Frost dates for Dobbs Ferry-Ardsley, New York
Half of years have their last spring frost by April 20, but 1 year in 10 still frosts after May 6.
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 6
- 1 year in 5
- April 30
- 3 years in 10
- April 27
- 2 years in 5
- April 23
- Half of years (the median)
- April 20
First fall freeze
How often the first freeze comes on or before each date.
- 1 year in 10
- October 10
- 1 year in 5
- October 15
- 3 years in 10
- October 19
- 2 years in 5
- October 23
- Half of years (the median)
- October 26
- Growing season
- about 189 days
- Hardiness zones nearby
- 7a, 7b
- Summer days
- a usual high of about 29 °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 ~4 °C40 °F · low ~-5 °C23 °F · rain ~98 mm3.9 in
- February
- high ~6 °C43 °F · low ~-4 °C24 °F · rain ~84 mm3.3 in
- March
- high ~10 °C51 °F · low ~-1 °C31 °F · rain ~111 mm4.4 in
- April
- high ~17 °C63 °F · low ~4 °C40 °F · rain ~108 mm4.3 in
- May
- high ~23 °C73 °F · low ~10 °C49 °F · rain ~108 mm4.3 in
- June
- high ~27 °C81 °F · low ~15 °C59 °F · rain ~116 mm4.6 in
- July
- high ~30 °C86 °F · low ~18 °C64 °F · rain ~115 mm4.5 in
- August
- high ~29 °C84 °F · low ~17 °C63 °F · rain ~113 mm4.4 in
- September
- high ~25 °C77 °F · low ~13 °C56 °F · rain ~117 mm4.6 in
- October
- high ~19 °C65 °F · low ~7 °C45 °F · rain ~112 mm4.4 in
- November
- high ~12 °C54 °F · low ~2 °C36 °F · rain ~99 mm3.9 in
- December
- high ~7 °C44 °F · low ~-2 °C29 °F · rain ~119 mm4.7 in
Where these numbers come from
NOAA NCEI 1991–2020 Climate Normals, the Dobbs Ferry-Ardsley station (listed by NOAA as Dobbs Ferry-Ardsley HCN, USC00302129), at 41.01, -73.83. 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
07620, 07624, 07626, 07627, 07640, 07642, 07645, 07647, 07648, 07656, 07675, 10502, 10503, 10522, 10523, 10530, 10533, 10538, 10543, 10583, 10591, 10601, 10605, 10606, 10607, 10701, 10703, 10706, 10707, 10708, 10709, 10710, 10801, 10804, 10913, 10954, 10960, 10962, 10964, 10965, 10968, 10976, 10977, 10983, 10989, 10994.
What can I plant here, and when? ›
Nearby stations
The nearest stations and how their last-frost dates compare. Together they show how frost varies across your area.
- Bronx, NY, last frost by April 1
- New York Laguardia Airport, NY, last frost by March 26
- Teterboro Airport, NJ, last frost by April 3
- New York Cntrl Pk Twr, NY, last frost by March 30
- Yorktown Heights 1 W, NY, last frost by April 25
- Wanaque Raymond Dam, NJ, last frost by April 19
Other stations in New York.
- Oceanside, NY, last frost by April 7
- Islip Li Macarthur Airport, NY, last frost by April 10
- Shirley Brookhaven Airport, NY, last frost by April 18
- Millbrook 3 W, NY, last frost by May 4
- Mohonk Lake, NY, last frost by April 21
- Liberty 1 NE, NY, last frost by May 9
- Hudson Correctional Facility, NY, last frost by April 25
- E Jewett, NY, last frost by May 20