Climate and average weather in Sawara

In Sawara, the summers are muggy, hot, showery, and partly cloudy and the winters are cool and mostly clear.

Best: mid April to mid November

Over the course of the year, the temperature in Sawara typically varies from 4°C to 28°C, and is rarely below 1°C or above 32°C. August is the hottest month of the year, while January is the coldest.

Based on the travel score, the best time of year to visit Sawara for warm-weather activities is from mid April to mid November.

Hottest
Aug
28°
Coldest
Jan
Wettest
Oct
213 mm
Driest
Dec
73 mm
Rain / yr
1505 mm
138 wet days
Daylight
9.6–14.4 h
shortest–longest
Elevation
8 m
35.9°N
Clearest
Jan
40% cloud

Sawara 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 mid November.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

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

The hot season lasts 3.2 months, from June 21 to September 26, with daily high temperatures above 24°C. The hottest month of the year in Sawara is August, with an average high of 28°C and low of 24°C.

The cool season lasts 3.5 months, from December 6 to March 20, with daily high temperatures below 13°C. The coldest month of the year in Sawara is January, with an average low of 4°C and high of 9°C.

Days typically run about 5°C warmer than nights year-round.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan94
Feb94
Mar127
Apr1611
May2015
Jun2319
Jul2722
Aug2824
Sep2522
Oct2117
Nov1611
Dec116

How hot and cold Sawara 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, Sawara feels like about 32°C (around August 9). About 4 days a year carry some heat stress, peaking in August.

On the coldest nights, wind chill pulls the feels-like down to about -0°C (around January 26), with roughly 26 freezing days a year (feels-like at or below 0°C), worst in January.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDec
Feels-like high (°C)Air high (°C)Feels-like low (°C)Air low (°C)
Jan9904
Feb9904
Mar121237
Apr16161011
May20201515
Jun23231919
Jul28272222
Aug31282424
Sep26252222
Oct21211717
Nov16161111
Dec111146

Average hourly temperature in Sawara

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 28°C, and coldest before dawn in January, near C.

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

Sawara 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 / 7780.69.82.0
Feb / 748.50.810.62.1
Mar12° / 12812.60.411.73.1
Apr16° / 11°11812.5012.94.9
May20° / 15°13612013.95.9
Jun23° / 19°15713.6014.45.8
Jul27° / 22°14913.6014.25.8
Aug28° / 24°10310.7013.45.7
Sep25° / 22°17113.8012.26.0
Oct21° / 17°21313011.16.0
Nov16° / 11°10710.7010.15.0
Dec11° / 739.209.63.1

Chance of rain

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

Sawara gets about 1505 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 2.4 months, from around May 9 to Jul 21, peaking in June at about 51% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jan 1.

October is the wettest month by volume, with 213 mm over about 13 wet days; December is the driest, with 73 mm.

0%10%20%30%40%50%60%JanFebMarAprMayJunJulAugSepOctNovDecdrierwetterdriermostly drysome rainoften wetvery wetJun 30 · 51%Jan 1 · 22%
Rain on a day (%)Rain days
Jan268
Feb319
Mar4013
Apr4213
May3912
Jun4714
Jul4214
Aug3611
Sep4614
Oct4213
Nov3611
Dec299

Monthly rainfall

Over a full year, Sawara collects about 1505 mm of rain across 138 wet days — roughly 125 mm in an average month.

It doesn’t fall evenly. October is the wettest month with 213 mm, while December is the driest at just 73 mm. The three wettest months alone bring about 36% of the year’s total, and some of the cold-season precipitation falls as snow.

050100150200250JanFebMarAprMayJunJulAugSepOctNovDec777412811813615714910317121310773
Rainfall (mm)Rain daysSnow days
Jan7781
Feb7491
Mar128130
Apr118130
May136120
Jun157140
Jul149140
Aug103110
Sep171140
Oct213130
Nov107110
Dec7390

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Sawara, 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 October 18 and lasts for 5.4 months, ending around March 29. The clearest month is January, when the sky is clear, mostly clear, or partly cloudy 70% of the time on average.

The cloudier part of the year begins around March 30 and lasts for 6.6 months, ending around October 17. The cloudiest month is June, when it is overcast or mostly cloudy 77% 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%JanFebMarAprMayJunJulAugSepOctNovDecJan 3 · 75%Jun 22 · 19%clearmostly clearpartly cloudymostly cloudyovercastclearercloudierclearer
Clearer (%)Cloudier (%)
Jan7030
Feb5842
Mar5050
Apr4357
May3664
Jun2377
Jul2971
Aug4357
Sep4060
Oct4654
Nov5644
Dec6832

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 8, brings about 14 h 24 min of light; the shortest, around January 1, 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)
Jan9.86:534:42
Feb10.66:335:12
Mar11.75:565:39
Apr12.95:116:05
May13.94:376:31
Jun14.44:266:51
Jul14.24:376:50
Aug13.45:016:23
Sep12.25:265:39
Oct11.15:514:55
Nov10.16:214:25
Dec9.66:474:21

Sunny days

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

Sawara averages about 10 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 3 and 19 days.

The sunnier stretch runs 5.0 months, from around Oct 20 to Mar 19. The sunniest month is January, with roughly 17 sunny days (bright).

The greyest month is June, down near 4 sunny days — about 78% fewer than the January peak.

0510152025JanFebMarAprMayJunJulAugSepOctNovDecsunniergreyersunniergloomymixedbrightbrilliantJan 119 daysJun 223 days
Sunny daysSky
Jan18Bright
Feb13Mixed
Mar10Mixed
Apr9Mixed
May7Gloomy
Jun4Gloomy
Jul5Gloomy
Aug8Gloomy
Sep7Gloomy
Oct10Mixed
Nov13Mixed
Dec17Bright

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 Sawara, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 4.7 months, from around May 26 to October 14. The muggiest month is August, when the air feels humid, muggy or worse about 99% of the time.

The most comfortable stretch runs from around October 15 to May 25, 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 6 · 100%Aug 1 · 0%miserablemuggyoppressivecomfortablehumiddrycomfortablehumidcomfortable
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
Jan10000000
Feb10000000
Mar9910000
Apr87122000
May393721300
Jun417383290
Jul011127547
Aug015175622
Sep491931325
Oct4026221110
Nov84134000
Dec9910000

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.

Across the year, average wind speed in Sawara is typically light breeze, near 14 km/h, and varies little with the seasons.

The windier part of the year lasts 4.7 months, from around Dec 21 to May 13. The windiest month is March, averaging about 16 km/h (light breeze).

The calmer part of the year runs from around May 14 to Sep 13, with July the calmest month at about 12 km/h.

05101520JanFebMarAprMayJunJulAugSepOctNovDecwindiercalmercalmlight breezeMar 14 · 16 km/hJul 27 · 12 km/h
Wind speed (km/h)Feels
Jan15light breeze
Feb15light breeze
Mar16light breeze
Apr15light breeze
May14light breeze
Jun13light breeze
Jul12light breeze
Aug13light breeze
Sep14light breeze
Oct14light breeze
Nov13light breeze
Dec14light breeze

Hazard calendar for Sawara

In seasonPeak

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

Sawara 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 Sawara

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around early November, Sawara is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.

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 time of year to visit Sawara for general outdoor tourist activities is from mid April to mid November, with a peak score in the last week of September.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationSep 28 · 6.1

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
Jan2.0poor
Feb2.1poor
Mar3.1poor
Apr4.8fair
May5.9good
Jun5.8good
Jul5.8good
Aug5.7good
Sep6.0good
Oct6.0good
Nov5.0fair
Dec3.1poor

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 Sawara for hot-weather activities is from mid July to mid September, with a peak score in the first week of August.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationAug 6 · 6.8

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 Sawara, 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 28°C), the essentials are light clothes, rain gear and sun protection. In the cold season around January (highs near 9°C), pack a warm layer and rain gear.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In August, Sawara sees daytime highs around 28°C and nights near 24°C. Pack light clothes. Worth having: rain gear and sun protection. About 11 days see rain.

Sea temperature near Sawara

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 29 km away) is warmest in August at about 24°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 23 to Oct 28 — about 4.2 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May17Cool
Jun20Cool
Jul22Refreshing
Aug24Warm
Sep23Refreshing
Oct21Refreshing
Nov19Cool
Dec16Cool

UV index (midday) in Sawara 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 Sawara peaks around August 12 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 12UV 10Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul10Very high
Aug10Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate

Average hourly UV index in Sawara

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 August the burn window is concentrated in the middle of the day: about 8 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
Feb2.50
Mar4.50
Apr6.52
May7.54.5
Jun85
Jul8.55.5
Aug85.5
Sep74.5
Oct50
Nov20
Dec00

Air quality in Sawara 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 Sawara is worst in March — around 25 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (December, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2425 µg/m³Dec 1914 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb18Moderate
Mar25Moderate
Apr25Moderate
May24Moderate
Jun19Moderate
Jul16Moderate
Aug15Moderate
Sep15Moderate
Oct16Moderate
Nov16Moderate
Dec14Moderate
Almanac & agriculture

Growing season

Chance of a frost-free day

Sawara is mild enough that a frost-free day stays more likely than not even in midwinter.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDec
Frost-free chance (%)Frost nights
Jan960
Feb950
Mar990
Apr1000
May1000
Jun1000
Jul1000
Aug1000
Sep1000
Oct1000
Nov1000
Dec990

Growing degree days

Degree days (base 10°C)

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. Sawara banks about 2,422 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
Mar6
Apr110
May241
Jun330
Jul450
Aug499
Sep403
Oct268
Nov111
Dec4

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.

Sawara receives about 4.0 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 2.3 and 5.5 kWh/m².

The brighter stretch of the year lasts 6.3 months, from around Mar 10 to Sep 16. The brightest month is May, averaging about 5.4 kWh/m² (bright).

The dimmest month is December, down near 2.4 kWh/m² — roughly 56% less than the May peak.

01234567JanFebMarAprMayJunJulAugSepOctNovDecdimmerbrighterdimmerdimmoderatebrightintenseMay 255.5 kWhDec 42.3 kWh
Solar energy (kWh/m²)Level
Jan2.8Moderate
Feb3.4Moderate
Mar4.2Bright
Apr5.0Bright
May5.4Bright
Jun5.0Bright
Jul5.1Bright
Aug5.2Bright
Sep4.0Bright
Oct3.1Moderate
Nov2.5Moderate
Dec2.3Moderate

Where is Sawara?

Sawara sits at 35.9°N, 140.5°E, 8 m above sea level, in Japan. The nearest listed city is Katori-shi, 2.0 km away.

Topography around Sawara

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

Within 3 km, the terrain around Sawara has only modest variations in elevation — a maximum elevation change of 59 m around an average of 18 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 71 m; within 80 km, large variations in elevation — a maximum elevation change of 840 m.

The land around Sawara is covered by trees (39%), cropland (25%) and artificial surfaces (22%) within 3 km, cropland (36%) and trees (33%) within 16 km, and water (36%) and trees (25%) within 80 km.

3 km
59 m
16 km
71 m
80 km
840 m
treesgrasslandcroplandartificial surfaceswater
Nearby: Katori-shi 2.0 km · Itako 7.0 km · Omigawa 11 km · Namegata 14 km · Kamisu 15 km · Kashima-shi 16 km · Inashiki 18 km · Edosaki 18 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 Sawara (35.8833°, 140.5°, elevation 8 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).