Frost dates for Boonton 1 SE, New Jersey
Half of years have their last spring frost by April 17, but 1 year in 10 still frosts after May 5.
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 5
- 1 year in 5
- April 30
- 3 years in 10
- April 24
- 2 years in 5
- April 20
- Half of years (the median)
- April 17
First fall freeze
How often the first freeze comes on or before each date.
- 1 year in 10
- October 8
- 1 year in 5
- October 13
- 3 years in 10
- October 17
- 2 years in 5
- October 20
- Half of years (the median)
- October 23
- Growing season
- about 189 days
- Hardiness zones nearby
- 6b, 7a
- 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 ~3 °C38 °F · low ~-6 °C21 °F · rain ~95 mm3.7 in
- February
- high ~4 °C40 °F · low ~-6 °C22 °F · rain ~71 mm2.8 in
- March
- high ~9 °C48 °F · low ~-2 °C29 °F · rain ~106 mm4.2 in
- April
- high ~16 °C61 °F · low ~4 °C39 °F · rain ~92 mm3.6 in
- May
- high ~22 °C71 °F · low ~10 °C49 °F · rain ~100 mm3.9 in
- June
- high ~27 °C81 °F · low ~15 °C59 °F · rain ~125 mm4.9 in
- July
- high ~30 °C85 °F · low ~18 °C64 °F · rain ~119 mm4.7 in
- August
- high ~29 °C84 °F · low ~17 °C62 °F · rain ~93 mm3.7 in
- September
- high ~25 °C76 °F · low ~12 °C54 °F · rain ~119 mm4.7 in
- October
- high ~18 °C64 °F · low ~6 °C42 °F · rain ~115 mm4.5 in
- November
- high ~11 °C53 °F · low ~1 °C33 °F · rain ~103 mm4.1 in
- December
- high ~6 °C42 °F · low ~-3 °C26 °F · rain ~111 mm4.4 in
Where these numbers come from
NOAA NCEI 1991–2020 Climate Normals, the Boonton 1 SE station (listed by NOAA as Boonton 1 SE HCN, USC00280907), at 40.89, -74.40. 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
07005, 07034, 07035, 07045, 07046, 07054, 07058, 07082, 07438, 07801, 07803, 07834, 07842, 07843, 07847, 07849, 07850, 07852, 07856, 07857, 07866, 07869, 07874, 07876, 07878, 07885, 07926, 07927, 07950, 07970, 07981.
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.
- Wanaque Raymond Dam, NJ, last frost by April 19
- Harrison, NJ, last frost by April 4
- Teterboro Airport, NJ, last frost by April 3
- Plainfield, NJ, last frost by April 11
- Somerville Somerset Airport, NJ, last frost by April 26
- New York Cntrl Pk Twr, NY, last frost by March 30
Other stations in New Jersey.
- Sussex 3 WNW, NJ, last frost by April 30
- Freehold-Marlboro, NJ, last frost by April 17
- Phillipsburg-Easton Brg, NJ, last frost by April 18
- Long Branch-Oakhurst, NJ, last frost by April 9
- Trenton State College, NJ, last frost by April 17
- Indian Mills 2 W, NJ, last frost by April 28
- Millville Municipal Airport, NJ, last frost by April 24