Climate and average weather in Konan

In Konan, the summers are muggy, hot, showery, and partly cloudy and the winters are cold, snowy, and partly cloudy.

Best: mid April to late June

Over the course of the year, the temperature in Konan typically varies from 0°C to 32°C, and is rarely below -3°C or above 36°C. August is the hottest month of the year, while January is the coldest.

Based on the travel score, the best times of year to visit Konan for warm-weather activities are from mid April to late June and mid September to mid November.

Hottest
Aug
32°
Coldest
Jan
Wettest
Jul
182 mm
Driest
Dec
58 mm
Rain / yr
1387 mm
126 wet days
Daylight
9.6–14.4 h
shortest–longest
Elevation
137 m
35.0°N
Clearest
Dec
53% cloud

Konan weather by month, at a glance

The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.

Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around mid April to late June.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

Daily average highs and lows in Konan, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.

The hot season lasts 3.4 months, from June 14 to September 23, with daily high temperatures above 26°C. The hottest month of the year in Konan is August, with an average high of 32°C and low of 24°C.

The cool season lasts 3.4 months, from December 4 to March 15, with daily high temperatures below 12°C. The coldest month of the year in Konan is January, with an average low of 0°C and high of 8°C.

Days typically run about 8°C warmer than nights year-round.

10°20°30°40°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan80
Feb91
Mar123
Apr188
May2313
Jun2618
Jul3023
Aug3224
Sep2820
Oct2213
Nov167
Dec102

How hot and cold Konan really feels

Feels-like highFeels-like lowactual air temp

The felt-temperature range through the year — heat index on the day's high (summer humidity), wind chill on the night's low (winter wind). The dashed lines are the plain thermometer; the gap is how much hotter or colder it really feels.

On the hottest afternoons, once humidity is folded in, Konan feels like about 36°C (around August 7). About 52 days a year carry some heat stress, peaking in August.

On the coldest nights, wind chill pulls the feels-like down to about -4°C (around January 29), with roughly 93 freezing days a year (feels-like at or below 0°C), worst in January.

10°20°30°40°JanFebMarAprMayJunJulAugSepOctNovDec
Feels-like high (°C)Air high (°C)Feels-like low (°C)Air low (°C)
Jan88-30
Feb89-31
Mar121203
Apr181878
May23231313
Jun26261818
Jul33302323
Aug35322324
Sep28282020
Oct22221313
Nov161667
Dec101002

Average hourly temperature in Konan

A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on August afternoons, near 32°C, and coldest before dawn in January, near C.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM

Konan weather by month

Every month at a glance. Click a month for its detailed page.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 618.32.59.91.2
Feb / 6492.510.71.6
Mar12° / 11012.20.611.73.2
Apr18° / 11911012.95.5
May23° / 13°13810.7013.86.5
Jun26° / 18°17712.9014.35.8
Jul30° / 23°18214.8014.14.3
Aug32° / 24°10311.1013.34.0
Sep28° / 20°15311.5012.25.8
Oct22° / 13°1489.6011.16.7
Nov16° / 746.8010.25.3
Dec10° / 587.71.19.72.5

Chance of rain

How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.

Konan gets about 1387 mm of precipitation a year. On a typical day the chance of rain is often wet, but that rises and falls sharply with the seasons.

The wetter season lasts 2.3 months, from around Jun 7 to Aug 16, peaking in July at about 55% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Nov 27.

July is the wettest month by volume, with 182 mm over about 15 wet days; December is the driest, with 58 mm. Some of the cold-season precipitation falls as snow.

0%10%20%30%40%50%60%70%JanFebMarAprMayJunJulAugSepOctNovDecdrierwetterdriermostly drysome rainoften wetvery wetJul 1 · 55%Nov 27 · 22%
Rain on a day (%)Rain days
Jan288
Feb329
Mar3912
Apr3711
May3411
Jun4413
Jul4715
Aug3611
Sep3812
Oct3110
Nov237
Dec248

Monthly rainfall

Over a full year, Konan collects about 1387 mm of rain across 126 wet days — roughly 116 mm in an average month.

It doesn’t fall evenly. July is the wettest month with 182 mm, while December is the driest at just 58 mm. The three wettest months alone bring about 37% of the year’s total, and some of the cold-season precipitation falls as snow.

050100150200JanFebMarAprMayJunJulAugSepOctNovDec61641101191381771821031531487458
Rainfall (mm)Rain daysSnow days
Jan6183
Feb6493
Mar110121
Apr119110
May138110
Jun177130
Jul182150
Aug103110
Sep153120
Oct148100
Nov7470
Dec5881

Snow in Konan

Average snowy days through the year, the snow-season span, and estimated snowfall — for ski trips and the perennial 'will there be snow at Christmas?' question.

Konan averages about 7 snowy days a year. Snow season runs roughly Dec 12 to Mar 17 — about 3.2 months.

February is snowiest, with roughly 2 days of snow and an estimated 13 cm of snowfall. Over the year that adds up to an estimated 27 cm of snow.

0246JanFebMarAprMayJunJulAugSepOctNovDecsnow seasonFeb 2
Snow daysSnowfall (cm)
Jan39
Feb313
Mar13
Apr00
May00
Jun00
Jul00
Aug00
Sep00
Oct00
Nov00
Dec12

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

How often the daytime sky is clear, partly cloudy or overcast.

In Konan, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.

The clearer part of the year begins around September 29 and lasts for 4.5 months, ending around February 11. The clearest month is December, when the sky is clear, mostly clear, or partly cloudy 62% of the time on average.

The cloudier part of the year begins around February 12 and lasts for 5.7 months, ending around August 2. The cloudiest month is June, when it is overcast or mostly cloudy 78% of the time.

0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JanFebMarAprMayJunJulAugSepOctNovDecDec 24 · 63%Jun 24 · 17%clearmostly clearpartly cloudymostly cloudyovercastclearercloudierclearer
Clearer (%)Cloudier (%)
Jan5248
Feb4456
Mar4357
Apr4258
May3763
Jun2278
Jul2971
Aug4654
Sep4456
Oct5347
Nov5743
Dec6238

Daylight, sunrise and sunset

DaylightNight

Hours of daylight through the year, with sunrise and sunset times.

The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around June 19, brings about 14 h 24 min of light; the shortest, around December 19, only 9 h 36 min — a swing of roughly 4 h 48 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan9.97:085:02
Feb10.76:505:31
Mar11.76:135:57
Apr12.95:296:22
May13.84:576:47
Jun14.34:467:06
Jul14.14:577:05
Aug13.35:206:39
Sep12.25:435:56
Oct11.16:085:14
Nov10.26:374:45
Dec9.77:024:42

Sunny days

How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.

Konan averages about 8 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 3 and 13 days.

The sunnier stretch runs 5.0 months, from around Jul 31 to Dec 29. The sunniest month is October, with roughly 12 sunny days (mixed).

The greyest month is June, down near 4 sunny days — about 67% fewer than the October peak.

051015JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergloomymixedOct 2813 daysJun 263 days
Sunny daysSky
Jan6Gloomy
Feb5Gloomy
Mar7Gloomy
Apr8Mixed
May8Gloomy
Jun4Gloomy
Jul5Gloomy
Aug9Mixed
Sep9Mixed
Oct12Mixed
Nov11Mixed
Dec10Mixed

Humidity comfort

DryComfortableHumidMuggyOppressiveMiserable

Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.

Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.

In Konan, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 4.2 months, from around June 3 to October 8. The muggiest month is July, when the air feels humid, muggy or worse about 99% of the time.

The most comfortable stretch runs from around October 9 to June 2, and March is the most comfortable month — the air is dry or comfortable 100% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecMar 23 · 100%Jul 17 · 0%oppressivecomfortabledryhumidmuggycomfortablehumidcomfortable
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
Jan10000000
Feb10000000
Mar10000000
Apr9262000
May602811200
Jun11253222100
Jul01830592
Aug01626625
Sep7162728220
Oct542515510
Nov9361000
Dec10000000

Wind

Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.

This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.

Wind in Konan is steady company: average speeds sit near 9 km/hcalm — in every month of the year, with no meaningful windy or calm season.

051015JanFebMarAprMayJunJulAugSepOctNovDeccalmlight breezeMar 14 · 11 km/hJul 17 · 8 km/h
Wind speed (km/h)Feels
Jan10calm
Feb10calm
Mar10calm
Apr10calm
May9calm
Jun8calm
Jul8calm
Aug8calm
Sep9calm
Oct9calm
Nov9calm
Dec9calm

Hazard calendar for Konan

In seasonPeak

When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.

Konan sits in the Pacific typhoon belt; the season peaks July–October.

Pacific typhoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Best time to visit Konan

TravelBeach/poolTemperatureCloudsPrecipitation

To characterize how pleasant the weather is in Konan throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.

Around late April, Konan is still near the start of its best-weather window — great conditions with the peak-season crowds not yet at full swing.

Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.

The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best times of year to visit Konan for general outdoor tourist activities run from mid April to late June and again from mid September to mid November, with a peak score in the second week of October.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timetravel scoretemperaturecloudsprecipitationOct 13 · 6.8

The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Travel score (0–10)Rating
Jan1.2poor
Feb1.6poor
Mar3.2poor
Apr5.5fair
May6.5good
Jun5.8good
Jul4.3fair
Aug4.1fair
Sep5.8good
Oct6.7good
Nov5.3fair
Dec2.6poor

The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Konan for hot-weather activities is from late May to early October, with a peak score in the first week of September.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationSep 7 · 6.5

The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

What to pack for Konan, by month

EssentialRecommendedOptional

Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.

For a warm-season trip around August (highs near 32°C), the essentials are light clothes, rain gear and sun protection. In the cold season around January (highs near 8°C), pack a warm layer, a heavy coat and rain gear.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In August, Konan sees daytime highs around 32°C and nights near 24°C. Pack light clothes. Worth having: rain gear and sun protection. About 11 days see rain.

Sea temperature near Konan

Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.

The sea at the nearest coast (about 50 km away) is warmest in August at about 27°C and coldest in February near 13°C.

It's comfortable for a long swim from May 31 to Nov 9 — about 5.4 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun22Refreshing
Jul26Warm
Aug27Warm
Sep26Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index (midday) in Konan by month

LowModerateHighVery highExtreme

Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.

Under clear skies, the midday UV index in Konan peaks around June 23 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJun 23UV 10Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Average hourly UV index in Konan

LowModerateHighVery highExtreme

Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.

The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

UV falls off far faster than brightness as the sun drops, so even in June the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 5.5 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM
UV ≥ 3 (h/day)UV ≥ 6 (h/day)
Jan00
Feb3.50
Mar50
Apr6.53
May7.54.5
Jun8.55.5
Jul8.55.5
Aug85
Sep74.5
Oct5.51
Nov30
Dec00

Air quality in Konan by month

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see which months the air is worst, not just the yearly average.

Air quality in Konan is worst in April — around 24 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (October, 12 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1723 µg/m³Oct 1812 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb17Moderate
Mar22Moderate
Apr24Moderate
May22Moderate
Jun19Moderate
Jul17Moderate
Aug17Moderate
Sep14Moderate
Oct12Good
Nov13Moderate
Dec12Moderate
Almanac & agriculture

Growing season

Chance of a frost-free dayTypical season (≥50%)

The growing season in Konan typically lasts about 347 days, from around February 9 to January 21 — the span where a frost-free day is more likely than not. It is reliably frost-free from March 26 to December 5.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDecgrowing seasonFeb 950%Mar 2690%Dec 590%Jan 2150%
Frost-free chance (%)Frost nights
Jan5431
Feb5728
Mar8224
Apr980
May1000
Jun1000
Jul1000
Aug1000
Sep1000
Oct1000
Nov980
Dec8026

Growing degree days

Degree days (base 10°C)Frost-free shaded

Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Konan banks about 2,438 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around August.

01,0002,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan0
Feb0
Mar0
Apr90
May250
Jun365
Jul503
Aug544
Sep406
Oct229
Nov50
Dec0

Solar energy

Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.

Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.

Konan receives about 4.0 kWh/m² a day of solar energy on average — moderate — with a clear seasonal swing between 2.2 and 5.5 kWh/m².

The brighter stretch of the year lasts 6.3 months, from around Mar 11 to Sep 19. The brightest month is May, averaging about 5.4 kWh/m² (bright).

The dimmest month is December, down near 2.3 kWh/m² — roughly 58% less than the May peak.

01234567JanFebMarAprMayJunJulAugSepOctNovDecdimmerbrighterdimmerdimmoderatebrightintenseMay 245.5 kWhDec 152.2 kWh
Solar energy (kWh/m²)Level
Jan2.5Moderate
Feb3.2Moderate
Mar4.2Bright
Apr5.0Bright
May5.4Bright
Jun4.9Bright
Jul5.0Bright
Aug5.2Bright
Sep4.1Bright
Oct3.4Moderate
Nov2.6Moderate
Dec2.2Moderate

Where is Konan?

Konan sits at 35.0°N, 136.1°E, 137 m above sea level, in Japan. The nearest listed city is Kōka, 6.0 km away.

Topography around Konan

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Konan.

Within 3 km, the terrain around Konan has significant variations in elevation — a maximum elevation change of 309 m around an average of 193 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 606 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,418 m.

The land around Konan is covered by trees (51%) and artificial surfaces (29%) within 3 km, trees (50%), cropland (23%) and artificial surfaces (23%) within 16 km, and trees (59%) within 80 km.

3 km
309 m
16 km
606 m
80 km
1,418 m
treesgrasslandcroplandartificial surfacesbare terrainwater
Nearby: Kōka 6.0 km · Minakuchichō-matoba 7.0 km · Rittō 9.0 km · Kusatsu 12 km · Moriyama 13 km · Yasu 13 km · Hino 14 km · Ōmihachiman 14 km

Japan travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
100 V · 50 / 60 Hz
Prices
≈ 65% of US
price level, 2025
GDP per capita
$35,951
2025
Happiness
6.1 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.2
per 100k, 2023
Road deaths
3.6
per 100k/yr, 2019
Income group
High
World Bank
English
Very low
EF EPI 446
Religion
Shintoism 49%Buddhism 46%other 4%Christianity 1%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Konan (34.9992°, 136.0967°, elevation 137 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).