Climate and monthly weather forecastCheonan, South Korea
Cheonan, South Korea - Climate and weather forecast by month. Detailed climate information with charts - average monthly weather with temperature, pressure, humidity, precipitation, wind, daylight, sunshine, visibility, and UV index data. The month with the most rainfall in Cheonan is July, when the rain falls for 22.2 days and typically aggregates up to 167mm (6.57") of precipitation. The month with the least rainfall in Cheonan is January, when the rain falls for 4.9 days and typically collects 16mm (0.63") of precipitation.
Climate and monthly weather forecast
The climate of Cheonan
Cheonan, situated in South Korea, is within the climatic domain denoted by Dwa according to the Köppen climate classification. Named 'Humid continental, severe dry winter, hot summer', this predominate climate demonstrates a distinct fluctuation between a bone-chilling winter and sweltering summer.Diving into the climate information reveals an annual narrative woven with a mix of seriously cold and incredibly hot periods. The monthly average temperature varies from a low of -5.7°C (21.7°F) in January to a peak of 28.9°C (84°F) in August. The humidity tends to peak in July at 86% and ebb to 62% in February and March. Variations in rainfall amplify from a mere 16mm (0.63") in January to soak the city with 167mm (6.57") in July. Whereas snowfall mostly decorates the city from November to March, the most intense accumulation transpires during December and January with 35mm (1.38") and 29mm (1.14") on average, respectively.
Akin to a rolling tide, daylight durations ebb and rise, going from 9.7 hours in December to a full stretch of 14.7 hours in June. The sunshine, mirroring the daylight pattern, moves from a low base of 5.6 hours daily (January and December) to a pinnacle at 10 hours during May and June.
The Best Time to Visit Cheonan
The optimal period to explore Cheonan falls between the end of April and the beginning of June. During this time, daily mean temperatures extend from 11.3°C (52.3°F) to 22.8°C (73°F). Visitors enjoy extended daylight hours, stretching from 13.1 to 14.1 hours, as well as an ample amount of sunshine. Rainfall is still moderate, offering a sufficient balance between warm weather and manageable precipitation.The Worst Time to Visit Cheonan
As the calendar flips to the sweltry months of July and August, conditions might turn intrusively humid and wet, diminishing the appeal for outdoor exploration. Humidity escalates to 86% and rainfall surges to 167mm (6.57"), indicating that sightseers might need to deal with frequent and intense precipitation. This is coupled with high temperatures, soaring up to 28.9°C (84°F) on average.Spring Weather in Cheonan
Spring, spreading from March to May, ushers in a period of tranquil renewal. Temperatures gallop from the chill of 1.3°C (34.3°F) in March, reaching a comfortable 22.8°C (73°F) average in May. Concurrently, daylight hours unfurl across a wider canvas, extending from 12 hours in March to 14.1 hours as May concludes.Summer Weather in Cheonan
As summer commences in June, a noticeable increment in humidity kicks in, going from 69% in May to a height of 86% in July. Correspondingly, rainfall heightens dramatically from 44mm (1.73") in May to 167mm (6.57") by July, rendering these two months the wettest in the year. The scorching heat of 28.1°C (82.6°F) and 28.9°C (84°F) in July and August, respectively, might also require an adaptation to the prevailing conditions.Autumn Weather in Cheonan
Autumn, spanning from September to November, signifies a period of climatic moderation. After the sweltering summer, temperatures taper off pleasantly from 24.5°C (76.1°F) in September to 11.4°C (52.5°F) by November. Rainfall follows suit, diminishing impressively from 61mm (2.4") to 31mm (1.22") over this period. This period is ripe with sunshine, as daylight hovers between 10.2 and 12.4 hours per day.Winter Weather in Cheonan
Winter, propelling from December into February, unveils a markedly chilly ambiance. Temperatures dip below freezing, moving from 3°C (37.4°F) down to -5.7°C (21.7°F) within December and January. Snow becomes a common spectacle, dominating the cityscape with 35mm (1.38") and 29mm (1.14") average snowfall during December and January, respectively. Humidity levels recede to their lowest values, contributing to the dryness that defines this cold season.Weather in January
Leading the year, January shields Cheonan under the spell of winter, with temperatures sinking as low as -5.7°C (21.7°F). Predominantly cold and brisk, it surpasses neighboring December and February in delivering the harshest chills. Weather in January »Weather in February
Indicative of winter's tenacity, February ushers in the chill of its predecessor, albeit with a slight leap in mercury levels. Progressing from January's intense freeze, it allows for milder conditions while preserving the wintry aura. Weather in February »Weather in March
Welcoming spring, March basks under milder weather conditions than its frosty precursors. A palpable shift in atmospheric composition transpires, signaling the arrival of Cheonan's sprightly spring. Evidence of winter retreats with a reduction in snowfall, promoting extended hours of sunshine. Weather in March »Weather in April
With April, spring makes its powerful presence felt in Cheonan, offering warmer days than the cooler March atmosphere. A sensory shift ensues as the city blooms under a new sun, setting the scene for an animated season. Winter elements fade, supplanted by moderate rainfall and extended daylight. Weather in April »Weather in May
As Cheonan transitions from spring to summer, May heralds warmer temperatures and longer days. Indicative of the transitioning climate, it outshines April with a palpable escalation in sunlit hours. Weather conditions amalgamate spring's moderation with a foretaste of summer heat, fundamentally shaping May’s character. Weather in May »Weather in June
June sees Cheonan fully immersed in the grip of summer. Transition from May's balanced climate to June's hotter days becomes evident as the month evolves. Intensified sunshine finds harmony with rising humidity levels, characterizing June's weather profile. Weather in June »Weather in July
July stands tall as the wettest month in Cheonan, witnessing a massive 167mm (6.57") of rainfall, marking a distinct climatic divergence from the preceding June. Defined by its high humidity and temperatures, the intensity of the monsoon peaks in this month. Weather in July »Weather in August
August brings with it a blend of residual monsoon showers and a steady warmth, following July's taxing weather. In a paradoxical fashion, Cheonan experiences both high humidity and amplified sunlight. An established characteristic, the summery weather persists, marking climatic consistency despite decreased precipitation measures. Weather in August »Weather in September
September marks the advent of autumn in Cheonan and a soothing retreat from the intense rain-infused summer of the preceding months. A cool breeze initiates the periodic character transition, brushing off residual monsoon traces. Weather in September »Weather in October
October nestles Cheonan in the heart of the autumn season, molding a marked climatic shift from September's mild weather. The city welcomes a tangible temperature drop, hinting at the close proximity of winter conditions. Regulated by its low rainfall and substantial sunshine allocation, October fosters a clear, crisp ambiance. Weather in October »Weather in November
As November unfolds in Cheonan, a strong signal indicating winter's arrival is noted. It is noticeably colder than October, reviving a trend of shorter days with less sunshine. Subtle traces of winter manifest themselves as the city witnesses an onset of snowfall with 8mm (0.31") of snow blanketing the terrain. Weather in November »Weather in December
Concluding the year, December brings winter back to Cheonan in its full glory. Deeper into the winter narrative than November, it exhibits an indisputable temperature plunge. Snowfall intensifies, reaching up to 35mm (1.38"), orchestrating a wintry rendevouz for the city. Weather in December »Updated: Jan 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January, recording an average high temperature of 1.1°C (34°F) and a low temperature of -5.7°C (21.7°F), is Cheonan's coldest month.
The month with the least rainfall in Cheonan is January, when the rain falls for 4.9 days and typically collects 16mm (0.63") of precipitation.
In Cheonan, during the entire year, the rain falls for 121.9 days and collects up to 694mm (27.32") of precipitation.
Months with snowfall in Cheonan are January through April, November and December.
In Cheonan, during the entire year, snow falls for 20.3 days and aggregates up to 114mm (4.49") of snow.
The months with the least sunshine in Cheonan, South Korea, are January and December, with an average of 5.6h of sunshine.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Cheonan.
February and March, with an average relative humidity of 62%, are the least humid months.
In Cheonan, South Korea, snow does not fall in May through October.
The months with the most sunshine in Cheonan are May and June, with an average of 10h of sunshine.
June has the longest days of the year, with an average of 14h and 36min of daylight.
June through August, with an average maximum UV index of 6, are months with the highest UV index in Cheonan.
With an average relative humidity of 86%, July is the most humid month.
The month with the most rainfall in Cheonan is July, when the rain falls for 22.2 days and typically aggregates up to 167mm (6.57") of precipitation.
August is the month when Cheonan's temperatures reach their peak, with averages of 28.9°C (84°F) and lows of 20.7°C (69.3°F).
December is the month with the most snowfall in Cheonan, South Korea. Snow falls for 7 days and accumulates 35mm (1.38") of snow.
The month with the shortest days in Cheonan, South Korea, is December, with an average of 9h and 42min of daylight.
Cheonan does not utilize Daylight Saving Time (DST). KST timezone is used throughout the entire year.
Average temperature
Cheonan, South Korea
The warmest month (with the highest average high temperature) is August (28.9°C).
The month with the lowest average high temperature is January (1.1°C).
The month with the highest average low temperature is August (20.7°C).
The coldest month (with the lowest average low temperature) is January (-5.7°C).
Average pressure
Cheonan, South Korea
- Average pressure in January:
1025.4mbar - Average pressure in February:
1023.7mbar - Average pressure in March:
1019.9mbar - Average pressure in April:
1015.5mbar - Average pressure in May:
1011.5mbar - Average pressure in June:
1007.8mbar
- Average pressure in July:
1007.1mbar - Average pressure in August:
1008.4mbar - Average pressure in September:
1014mbar - Average pressure in October:
1019.4mbar - Average pressure in November:
1022.4mbar - Average pressure in December:
1024.4mbar
The month with the highest atmospheric pressure is January (1025.4mbar).
The month with the lowest atmospheric pressure is July (1007.1mbar).
Average wind speed
Cheonan, South Korea
- Average wind speed in January:
8.7km/h - Average wind speed in February:
9.6km/h - Average wind speed in March:
10.6km/h - Average wind speed in April:
10.2km/h - Average wind speed in May:
8.9km/h - Average wind speed in June:
7km/h
- Average wind speed in July:
8.1km/h - Average wind speed in August:
7.5km/h - Average wind speed in September:
6.7km/h - Average wind speed in October:
7.7km/h - Average wind speed in November:
8.5km/h - Average wind speed in December:
9.4km/h
The windiest month (with the highest average wind speed) is March (10.6km/h).
The calmest month (with the lowest average wind speed) is September (6.7km/h).
Average humidity
Cheonan, South Korea
The month with the highest relative humidity is July (86%).
The months with the lowest relative humidity are February and March (62%).
Average rainfall
Cheonan, South Korea
The wettest month (with the highest rainfall) is July (167mm).
The driest month (with the least rainfall) is January (16mm).
Average rainfall days
Cheonan, South Korea
- Average rainfall days in January:
4.9 days - Average rainfall days in February:
4.7 days - Average rainfall days in March:
7.8 days - Average rainfall days in April:
9.8 days - Average rainfall days in May:
8.8 days - Average rainfall days in June:
14.1 days
- Average rainfall days in July:
22.2 days - Average rainfall days in August:
18.4 days - Average rainfall days in September:
9.2 days - Average rainfall days in October:
5.8 days - Average rainfall days in November:
7.7 days - Average rainfall days in December:
8.5 days
The month with the highest number of rainy days is July (22.2 days).
The month with the least rainy days is February (4.7 days).
Average snowfall
Cheonan, South Korea
The month with the highest snowfall is December (35mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days
Cheonan, South Korea
- Average snowfall days in January:
7.5 days - Average snowfall days in February:
3.4 days - Average snowfall days in March:
1.3 days - Average snowfall days in April:
0.1 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
1 days - Average snowfall days in December:
7 days
The month with the highest number of snowfall days is January (7.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Cheonan, South Korea
- Average daylight in January:
10h and 0min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 6min - Average daylight in May:
14h and 6min - Average daylight in June:
14h and 36min
- Average daylight in July:
14h and 24min - Average daylight in August:
13h and 30min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 18min - Average daylight in November:
10h and 12min - Average daylight in December:
9h and 42min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in January:
5h and 36min - Average sunshine in February:
7h and 18min - Average sunshine in March:
8h and 0min - Average sunshine in April:
8h and 54min - Average sunshine in May:
10h and 0min - Average sunshine in June:
10h and 0min
- Average sunshine in July:
7h and 48min - Average sunshine in August:
9h and 0min - Average sunshine in September:
8h and 12min - Average sunshine in October:
7h and 18min - Average sunshine in November:
5h and 42min - Average sunshine in December:
5h and 36min
The months with the most sunshine are May and June (Average sunshine: 10h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).
Average sunshine days
Cheonan, South Korea
- Average sunshine days in January:
21.3 days - Average sunshine days in February:
20.8 days - Average sunshine days in March:
21.5 days - Average sunshine days in April:
19.3 days - Average sunshine days in May:
20.6 days - Average sunshine days in June:
13.8 days
- Average sunshine days in July:
7 days - Average sunshine days in August:
10 days - Average sunshine days in September:
18.2 days - Average sunshine days in October:
24.5 days - Average sunshine days in November:
21 days - Average sunshine days in December:
17.8 days
The month with the most sunshine days is October (24.5 days).
The month with the least sunshine days is July (7 days).
Average UV index
Cheonan, South Korea
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Cheonan, South Korea
The month with the most cloud cover is July (Cloud cover 54).
The month with the least cloud cover is October (Cloud cover 25).
Average visibility
Cheonan, South Korea
The months with the highest visibility are February, March, October and November (10km).
The month with the lowest visibility is July (7km).
