Brooklyn, New York, United States

Frost dates for Brooklyn

The full distribution rather than a single date. Every figure below is a percentile of 30 years of daily minimum temperatures at this location, expressed as the date it fell on.

Median last spring frost

29 March

Half of years are later than this. Not a planting date.

Median first autumn frost

2 December

The far end of the outdoor season.

Frost-free season

249 days

Between those two dates in a median year.

Last and first frost by severity

Read a row as: in this fraction of years, the last frost of spring had already happened by this date. The 90% column is the cautious planting date; the 10% column is the gamble.

Light frost — nights at or below 0°C (32°F). Air temperature reaches freezing. Kills basil, beans and unhardened tomatoes; hardy crops shrug it off.
Frost	1 year in 10	Median	9 years in 10	Earliest	Latest
Last of spring	18 Mar	29 Mar	8 Apr	2 Mar	16 Apr
First of autumn	20 Nov	2 Dec	22 Dec	10 Nov	29 Dec
Frost-free days	279	249	225	every year on record saw this

Moderate frost — nights at or below -2.2°C (28°F). Damages half-hardy plants and most blossom. This is the threshold that decides a fruit crop.
Frost	1 year in 10	Median	9 years in 10	Earliest	Latest
Last of spring	25 Feb	13 Mar	27 Mar	13 Feb	5 Apr
First of autumn	28 Nov	14 Dec	27 Dec	22 Nov	31 Dec
Frost-free days	306	277	246	every year on record saw this

Hard frost — nights at or below -4.4°C (24.1°F). Ground freezes and even hardy crops check their growth. Effectively the end of the outdoor year.
Frost	1 year in 10	Median	9 years in 10	Earliest	Latest
Last of spring	5 Feb	27 Feb	12 Mar	21 Jan	15 Mar
First of autumn	7 Dec	22 Dec	30 Dec	23 Nov	1 Jan
Frost-free days	328	299	269	every year on record saw this

Dates in the southern hemisphere are computed on a growing year that starts in July, which is why "last of spring" falls where it should rather than in the middle of the calendar.

Chance of frost, week by week

Chance of at least one air frost during each week of the year, measured across the full record. The flat stretch in the middle is your frost-free season.

Temperature through the year

Mean monthly temperature across the record. Months shown in blue average at least one air frost.

Monthly means and average number of frost nights.
Month	Mean low	Mean high	Frost nights
January	-1.3°C	3.8°C	17.9
February	-1.1°C	4.2°C	15.8
March	1.6°C	7.2°C	9
April	6.1°C	12°C	0.5
May	11.4°C	17°C	0
June	17.1°C	22.3°C	0
July	21.1°C	26.1°C	0
August	21.1°C	26°C	0
September	17.8°C	23°C	0
October	12.2°C	17.6°C	0
November	6.4°C	11.7°C	1.1
December	2°C	6.8°C	8.4

Turn these dates into a planting calendar →

Nearby

Compare with places close by

New York City Zone 8a 9 km Last frost 29 Mar First 2 Dec Queens Zone 8a 10 km Last frost 29 Mar First 2 Dec Manhattan Zone 7a 15 km Last frost 15 Apr First 4 Nov The Bronx Zone 7a 23 km Last frost 15 Apr First 4 Nov Philadelphia Zone 7a 129 km Last frost 14 Apr First 2 Nov