Tongchuanshi, Shaanxi, China

Frost dates for Tongchuanshi

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

26 March

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

Median first autumn frost

7 November

The far end of the outdoor season.

Frost-free season

226 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	17 Mar	26 Mar	13 Apr	7 Mar	20 Apr
First of autumn	27 Oct	7 Nov	19 Nov	10 Oct	22 Nov
Frost-free days	247	226	197	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 Mar	19 Mar	6 Apr	27 Feb	13 Apr
First of autumn	6 Nov	17 Nov	24 Nov	2 Nov	29 Nov
Frost-free days	264	244	214	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	17 Feb	28 Feb	20 Mar	1 Feb	25 Mar
First of autumn	10 Nov	25 Nov	4 Dec	2 Nov	13 Dec
Frost-free days	290	270	235	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	-5.6°C	4.3°C	30.8
February	-3°C	8.4°C	24.4
March	1.7°C	15.7°C	10.9
April	7.7°C	22.4°C	0.8
May	13.1°C	27.3°C	0
June	18.2°C	31.6°C	0
July	20.7°C	32.2°C	0
August	19.7°C	30.8°C	0
September	14.6°C	25.7°C	0
October	8°C	19.5°C	0.3
November	0.7°C	12.7°C	13.7
December	-4.4°C	6°C	30.1

Turn these dates into a planting calendar →

Nearby

Compare with places close by

Yintai Zone 7b 5 km Last frost 26 Mar First 7 Nov Tongchuan Zone 7b 23 km Last frost 3 Apr First 2 Nov Weinan Zone 8a 74 km Last frost 23 Mar First 17 Nov Xianyang Zone 8a 89 km Last frost 19 Mar First 17 Nov Xi’an Zone 8a 92 km Last frost 19 Mar First 17 Nov Huayin Zone 7b 106 km Last frost 2 Apr First 2 Nov Yongji Zone 7b 126 km Last frost 26 Mar First 15 Nov Qingyang Zone 7a 148 km Last frost 12 Apr First 26 Oct