Frost dates for Sussex 3 WNW, New Jersey
Half of years have their last spring frost by April 30, but 1 year in 10 still frosts after May 18.
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 18
- 1 year in 5
- May 11
- 3 years in 10
- May 7
- 2 years in 5
- May 4
- Half of years (the median)
- April 30
First fall freeze
How often the first freeze comes on or before each date.
- 1 year in 10
- September 30
- 1 year in 5
- October 3
- 3 years in 10
- October 5
- 2 years in 5
- October 8
- Half of years (the median)
- October 11
- Growing season
- about 163 days
- Hardiness zone nearby
- 6b
- Summer days
- a usual high of about 27 °C81 °F
- Lettuce and spinach run to seed
- June to August, 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 °C35 °F · low ~-8 °C17 °F · rain ~89 mm3.5 in
- February
- high ~3 °C38 °F · low ~-8 °C18 °F · rain ~69 mm2.7 in
- March
- high ~8 °C47 °F · low ~-4 °C25 °F · rain ~92 mm3.6 in
- April
- high ~15 °C60 °F · low ~2 °C36 °F · rain ~106 mm4.2 in
- May
- high ~21 °C71 °F · low ~8 °C46 °F · rain ~98 mm3.9 in
- June
- high ~26 °C78 °F · low ~13 °C55 °F · rain ~132 mm5.2 in
- July
- high ~28 °C83 °F · low ~16 °C60 °F · rain ~111 mm4.4 in
- August
- high ~28 °C82 °F · low ~15 °C58 °F · rain ~114 mm4.5 in
- September
- high ~24 °C74 °F · low ~10 °C51 °F · rain ~126 mm5 in
- October
- high ~17 °C63 °F · low ~4 °C40 °F · rain ~118 mm4.7 in
- November
- high ~10 °C51 °F · low ~-1 °C31 °F · rain ~80 mm3.2 in
- December
- high ~4 °C40 °F · low ~-5 °C23 °F · rain ~101 mm4 in
Where these numbers come from
NOAA NCEI 1991–2020 Climate Normals, the Sussex 3 WNW station (listed by NOAA as Sussex 3 WNW, USC00288644), at 41.22, -74.66. 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
07416, 07418, 07419, 07422, 07439, 07460, 07461, 07462, 07820, 07821, 07822, 07826…
+15 moreShow fewer
07827, 07846, 07848, 07851, 07860, 07871, 07881, 10969, 10988, 10998, 12771, 18324, 18328, 18336, 18337.
Nearby stations
The nearest stations and how their last-frost dates compare. Together they show how frost varies across your area.
- Wanaque Raymond Dam, NJ, last frost by April 19
- Boonton 1 SE, NJ, last frost by April 17
- Mt Pocono Mountains Airport, PA, last frost by May 6
- Liberty 1 NE, NY, last frost by May 9
- Teterboro Airport, NJ, last frost by April 3
- Somerville Somerset Airport, NJ, last frost by April 26
Other stations in New Jersey.
- Harrison, NJ, last frost by April 4
- Plainfield, NJ, last frost by April 11
- Phillipsburg-Easton Brg, NJ, last frost by April 18
- Trenton State College, NJ, last frost by April 17
- Freehold-Marlboro, NJ, last frost by April 17
- Long Branch-Oakhurst, NJ, last frost by April 9
- Indian Mills 2 W, NJ, last frost by April 28
- Millville Municipal Airport, NJ, last frost by April 24
When do I plant? · Where the dates come from
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