Beijing, Beijing, China

Frost dates for Beijing

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

8 April

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

Median first autumn frost

27 October

The far end of the outdoor season.

Frost-free season

203 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	29 Mar	8 Apr	20 Apr	20 Mar	27 Apr
First of autumn	19 Oct	27 Oct	5 Nov	13 Oct	8 Nov
Frost-free days	221	203	182	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	17 Mar	31 Mar	11 Apr	7 Mar	27 Apr
First of autumn	25 Oct	4 Nov	15 Nov	16 Oct	18 Nov
Frost-free days	243	218	197	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	7 Mar	12 Mar	24 Mar	21 Feb	29 Mar
First of autumn	1 Nov	14 Nov	27 Nov	27 Oct	1 Dec
Frost-free days	266	248	222	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	-10.4°C	1.4°C	31
February	-6.9°C	5.4°C	28
March	-1.7°C	13.4°C	22.9
April	5.2°C	21.7°C	2.9
May	12.4°C	28.6°C	0
June	18°C	32.3°C	0
July	21.1°C	32.5°C	0
August	19.6°C	30.6°C	0
September	13.8°C	26.5°C	0
October	5.6°C	19.3°C	2.3
November	-2°C	10°C	21.8
December	-8.4°C	2.5°C	30.9

Turn these dates into a planting calendar →

Nearby

Compare with places close by

Sanhe Zone 7a 58 km Last frost 8 Apr First 27 Oct Tianjin Zone 7a 108 km Last frost 7 Apr First 30 Oct Baoding Zone 7a 140 km Last frost 1 Apr First 7 Nov Tangshan Zone 7a 155 km Last frost 8 Apr First 26 Oct