Chungju, North Chungcheong, South Korea

Frost dates for Chungju

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

16 April

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

Median first autumn frost

28 October

The far end of the outdoor season.

Frost-free season

196 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 3 Apr 16 Apr 26 Apr 29 Mar 29 Apr
First of autumn 18 Oct 28 Oct 7 Nov 11 Oct 14 Nov
Frost-free days 218 196 175 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 27 Mar 8 Apr 19 Apr 22 Mar 25 Apr
First of autumn 24 Oct 3 Nov 14 Nov 16 Oct 19 Nov
Frost-free days 232 209 188 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 9 Mar 27 Mar 6 Apr 3 Mar 12 Apr
First of autumn 31 Oct 14 Nov 20 Nov 26 Oct 25 Nov
Frost-free days 257 232 208 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

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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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 -10.3°C -0.3°C 30.6
February -7.4°C 3°C 27.3
March -2.6°C 9.1°C 24.6
April 3°C 16.1°C 7
May 9.1°C 21.8°C 0
June 14.8°C 26.2°C 0
July 19.2°C 27.4°C 0
August 19.7°C 27.6°C 0
September 14°C 23.3°C 0
October 6.6°C 17.4°C 2.2
November -0.4°C 9.6°C 16.1
December -7.7°C 1.6°C 29.8

Turn these dates into a planting calendar →

Nearby

Compare with places close by

Wŏnju Zone 6a 42 km Last frost 18 Apr First 26 Oct Yeoju Zone 6b 44 km Last frost 12 Apr First 28 Oct Chinch'ŏn Zone 6b 45 km Last frost 10 Apr First 1 Nov Mungyeong Zone 7a 49 km Last frost 10 Apr First 31 Oct Pubal Zone 6b 51 km Last frost 12 Apr First 28 Oct Cheongju-si Zone 7a 54 km Last frost 8 Apr First 1 Nov Icheon-si Zone 6b 55 km Last frost 12 Apr First 28 Oct Anseong Zone 6b 59 km Last frost 10 Apr First 1 Nov

Seasonal context

Rainfall and the growing season in Chungju

July has the highest average precipitation (324 mm); January has the lowest (22 mm). Compare this pattern with the planting windows and your water supply.

Jan 22 mm
Feb 33 mm
Mar 43 mm
Apr 80 mm
May 77 mm
Jun 134 mm
Jul 324 mm
Aug 253 mm
Sep 140 mm
Oct 54 mm
Nov 40 mm
Dec 22 mm

During wetter months, check that beds and containers drain after heavy rain. During drier months, plan how you will keep seeds and new transplants watered. Monthly averages can hide long dry spells and intense storms; they do not show soil moisture, humidity or this week's weather.

Source: NASA POWER, corrected MERRA-2 precipitation, 2001–2020. Values are approximate monthly totals, including the water equivalent of snow, from the nearest 0.5° × 0.625° grid cell. This reference period differs from the temperature record. Rainfall provides context and does not change the calculated planting dates. Method and limitations.

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