Safe to Plant

Anshun, Guizhou, China

Frost dates for Anshun

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

6 March

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

Median first autumn frost

1 December

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 10 Feb 6 Mar 22 Mar 28 Jan 11 Apr
First of autumn 16 Nov 1 Dec 10 Dec 7 Nov 16 Dec
Frost-free days 304 270 239 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 26 Jan 16 Feb 7 Mar 12 Jan 18 Mar
First of autumn 5 Dec 14 Dec 24 Dec 17 Nov 28 Dec
Frost-free days 332 301 273 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 11 Jan 26 Jan 21 Feb 7 Jan 5 Mar
First of autumn 15 Dec 26 Dec 30 Dec 14 Dec 1 Jan
Frost-free days 353 334 297 3 of 30 years saw none at all

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

Jan Mar Apr Jul Sep Oct Dec
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

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F
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A
M
J
J
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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 -0.2°C 11.4°C 16.9
February 2°C 15.3°C 8.4
March 6°C 20.3°C 1.5
April 10.2°C 24.1°C 0.1
May 13.5°C 25.3°C 0
June 16.4°C 25.2°C 0
July 17.7°C 25.5°C 0
August 17°C 25.5°C 0
September 14.3°C 23.6°C 0
October 10.6°C 19.7°C 0
November 5.8°C 16.1°C 1.2
December 0.9°C 11.3°C 12.6

Turn these dates into a planting calendar →

Nearby

Compare with places close by

Guiyang Zone 9a 86 km Last frost 5 Mar First 5 Dec Liupanshui Zone 9a 116 km Last frost 4 Mar First 27 Nov Bijie Zone 9a 133 km Last frost 9 Mar First 27 Nov Xingyi Zone 9a 164 km Last frost 5 Feb First 15 Dec Zunyi Zone 9a 187 km Last frost 25 Feb First 7 Dec Kaili Zone 8b 207 km Last frost 2 Mar First 3 Dec Qujing Zone 9a 231 km Last frost 26 Feb First 2 Dec Zhaotong Zone 8b 250 km Last frost 20 Mar First 18 Nov