Chengzhong, Hubei, China

Frost dates for Chengzhong

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

5 March

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

Median first autumn frost

30 November

The far end of the outdoor season.

Frost-free season

270 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	20 Feb	5 Mar	18 Mar	9 Feb	22 Mar
First of autumn	12 Nov	30 Nov	7 Dec	3 Nov	9 Dec
Frost-free days	290	270	239	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	6 Feb	21 Feb	6 Mar	18 Jan	13 Mar
First of autumn	23 Nov	6 Dec	15 Dec	13 Nov	31 Dec
Frost-free days	312	288	262	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	16 Jan	1 Feb	27 Feb	5 Jan	10 Mar
First of autumn	28 Nov	18 Dec	30 Dec	17 Nov	31 Dec
Frost-free days	348	320	274	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	-1.2°C	9.4°C	21.1
February	1.3°C	12.4°C	10.6
March	6°C	17.9°C	1.9
April	11.7°C	23.7°C	0
May	16.7°C	28°C	0
June	21.5°C	31.3°C	0
July	24.7°C	32.6°C	0
August	24.1°C	33.1°C	0
September	19.5°C	30.4°C	0
October	13.2°C	24.6°C	0
November	6.5°C	17.9°C	1.6
December	0.2°C	11.4°C	15.1

Turn these dates into a planting calendar →

Nearby

Compare with places close by

Xiaogan Zone 8b 35 km Last frost 5 Mar First 30 Nov Jingling Zone 9a 54 km Last frost 2 Mar First 1 Dec Xiantao Zone 9a 65 km Last frost 27 Feb First 1 Dec Wuhan Zone 9a 79 km Last frost 21 Feb First 7 Dec Suizhou Zone 8b 87 km Last frost 9 Mar First 26 Nov Jingmen Zone 9a 129 km Last frost 6 Mar First 28 Nov Huanggang Zone 9a 137 km Last frost 28 Feb First 3 Dec Xinyang Zone 8b 140 km Last frost 14 Mar First 23 Nov