Climate and average weather in Menuma

In Menuma, the summers are muggy, hot, wet, and partly cloudy and the winters are cool, snowy, and mostly clear.

Best: early April to late June

Over the course of the year, the temperature in Menuma typically varies from -0°C to 30°C, and is rarely below -3°C or above 34°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 Menuma for warm-weather activities are from early April to late June and mid September to mid November.

Hottest
Aug
30°
Coldest
Jan
-0°
Wettest
Sep
221 mm
Driest
Dec
51 mm
Rain / yr
1625 mm
148 wet days
Daylight
9.5–14.5 h
shortest–longest
Elevation
29 m
36.2°N
Clearest
Jan
37% cloud

Menuma 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 early April to late June.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

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

The hot season lasts 3.3 months, from June 15 to September 21, with daily high temperatures above 25°C. The hottest month of the year in Menuma is August, with an average high of 30°C and low of 23°C.

The cool season lasts 3.4 months, from December 2 to March 14, with daily high temperatures below 12°C. The coldest month of the year in Menuma is January, with an average low of -0°C and high of 8°C.

Days typically run about 8°C warmer than nights, with the widest day–night swing (around 10°C) in April.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan80
Feb90
Mar133
Apr188
May2314
Jun2518
Jul2922
Aug3023
Sep2620
Oct2114
Nov157
Dec102

How hot and cold Menuma 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, Menuma feels like about 35°C (around August 6). About 40 days a year carry some heat stress, peaking in August.

On the coldest nights, wind chill pulls the feels-like down to about -3°C (around January 28), with roughly 84 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)
Jan88-30
Feb99-20
Mar131313
Apr181878
May23231414
Jun25251818
Jul31292222
Aug34302323
Sep27262020
Oct21211414
Nov151567
Dec101002

Average hourly temperature in Menuma

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 30°C, and coldest before dawn in January, near -0°C.

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

Menuma 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 / -0°556.129.81.6
Feb / 536.92.310.62.0
Mar13° / 10411.81.511.73.5
Apr18° / 12112.20.212.95.4
May23° / 14°15313.7013.96.1
Jun25° / 18°18716.7014.45.3
Jul29° / 22°22018.8014.24.3
Aug30° / 23°17116.4013.44.1
Sep26° / 20°22116.7012.25.3
Oct21° / 14°20613.7011.15.9
Nov15° / 838.6010.15.0
Dec10° / 516.70.49.62.8

Chance of rain

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

Menuma gets about 1625 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 5.7 months, from around May 3 to Oct 21, peaking in July at about 65% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jan 1.

September is the wettest month by volume, with 221 mm over about 17 wet days; December is the driest, with 51 mm. Some of the cold-season precipitation falls as snow.

0%10%20%30%40%50%60%70%80%JanFebMarAprMayJunJulAugSepOctNovDecdrierwetterdriermostly drysome rainoften wetvery wetJul 4 · 65%Jan 1 · 17%
Rain on a day (%)Rain days
Jan206
Feb267
Mar3712
Apr4112
May4314
Jun5717
Jul6019
Aug5416
Sep5617
Oct4314
Nov299
Dec217

Monthly rainfall

Over a full year, Menuma collects about 1625 mm of rain across 148 wet days — roughly 135 mm in an average month.

It doesn’t fall evenly. September is the wettest month with 221 mm, while December is the driest at just 51 mm. The three wettest months alone bring about 40% of the year’s total, and some of the cold-season precipitation falls as snow.

050100150200250JanFebMarAprMayJunJulAugSepOctNovDec55531041211531872201712212068351
Rainfall (mm)Rain daysSnow days
Jan5562
Feb5372
Mar104122
Apr121120
May153140
Jun187170
Jul220190
Aug171160
Sep221170
Oct206140
Nov8390
Dec5170

Snow in Menuma

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.

Menuma averages about 6 snowy days a year. Snow season runs roughly Dec 23 to Apr 3 — about 3.4 months.

February is snowiest, with roughly 3 days of snow and an estimated 18 cm of snowfall. Over the year that adds up to an estimated 44 cm of snow.

01234JanFebMarAprMayJunJulAugSepOctNovDecsnow seasonFeb 5
Snow daysSnowfall (cm)
Jan218
Feb218
Mar25
Apr01
May00
Jun00
Jul00
Aug00
Sep00
Oct00
Nov00
Dec02

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Menuma, 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 5.7 months, ending around April 8. The clearest month is January, when the sky is clear, mostly clear, or partly cloudy 75% of the time on average.

The cloudier part of the year begins around April 9 and lasts for 6.3 months, ending around October 17. 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%JanFebMarAprMayJunJulAugSepOctNovDecJan 2 · 79%Jun 23 · 18%clearmostly clearpartly cloudymostly cloudyovercastclearercloudierclearer
Clearer (%)Cloudier (%)
Jan7525
Feb6535
Mar5545
Apr4753
May3763
Jun2278
Jul2575
Aug3664
Sep3664
Oct4852
Nov6139
Dec7327

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 16, brings about 14 h 30 min of light; the shortest, around December 16, only 9 h 30 min — a swing of roughly 5 hours.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan9.86:584:45
Feb10.66:385:16
Mar11.76:015:44
Apr12.95:156:10
May13.94:416:36
Jun14.44:296:56
Jul14.24:416:55
Aug13.45:056:28
Sep12.25:305:44
Oct11.15:564:59
Nov10.16:264:29
Dec9.66:524:25

Sunny days

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

Menuma averages about 10 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 2 and 20 days.

The sunnier stretch runs 5.5 months, from around Oct 20 to Apr 4. The sunniest month is December, with roughly 18 sunny days (bright).

The greyest month is June, down near 3 sunny days — about 81% fewer than the December peak.

0510152025JanFebMarAprMayJunJulAugSepOctNovDecsunniergreyersunniergloomymixedbrightbrilliantDec 3020 daysJun 232 days
Sunny daysSky
Jan19Bright
Feb14Bright
Mar12Mixed
Apr10Mixed
May8Gloomy
Jun3Gloomy
Jul4Gloomy
Aug6Gloomy
Sep6Gloomy
Oct10Mixed
Nov15Bright
Dec19Bright

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

The more humid part of the year lasts 4.3 months, from around May 31 to October 9. 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 10 to May 30, 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 29 · 100%Aug 3 · 0%miserablehumidmuggydrycomfortableoppressivecomfortablehumidcomfortable
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
Jan10000000
Feb10000000
Mar10000000
Apr9361000
May553013200
Jun822342790
Jul0211294710
Aug017215517
Sep7132528252
Oct552415500
Nov9550000
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 Menuma is steady company: average speeds sit near 7 km/hcalm — in every month of the year, with no meaningful windy or calm season.

051015JanFebMarAprMayJunJulAugSepOctNovDeccalmlight breezeFeb 13 · 8 km/hJul 19 · 5 km/h
Wind speed (km/h)Feels
Jan8calm
Feb8calm
Mar8calm
Apr8calm
May7calm
Jun6calm
Jul5calm
Aug5calm
Sep6calm
Oct6calm
Nov6calm
Dec7calm

Hazard calendar for Menuma

In seasonPeak

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

Menuma's rainy season runs March–October, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Best time to visit Menuma

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around mid April, Menuma 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 Menuma for general outdoor tourist activities run from early April to late June and again from mid September to mid November, with a peak score in the last week of May.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timebest timetravel scoretemperaturecloudsprecipitationMay 25 · 6.2

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
Jan1.7poor
Feb2.0poor
Mar3.5poor
Apr5.4fair
May6.1good
Jun5.3fair
Jul4.3fair
Aug4.1fair
Sep5.3fair
Oct5.9good
Nov5.0fair
Dec2.8poor

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 Menuma for hot-weather activities is from mid May to early October, with a peak score in the first week of August.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationAug 2 · 5.7

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 Menuma, 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 30°C), the essentials are light clothes and rain gear. In the cold season around January (highs near 8°C), pack a warm layer.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In August, Menuma sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. About 16 days see rain.

UV index (midday) in Menuma 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 Menuma peaks around July 16 at about 9 (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 highModerateJul 16UV 9Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate

Average hourly UV index in Menuma

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 July 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
Feb30
Mar4.50
Apr6.52.5
May7.54.5
Jun8.55.5
Jul8.55.5
Aug85
Sep74
Oct50
Nov2.50
Dec00

Air quality in Menuma 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 Menuma is worst in April — around 26 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (December, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1426 µg/m³Dec 1814 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb21Moderate
Mar25Moderate
Apr26Moderate
May24Moderate
Jun20Moderate
Jul17Moderate
Aug16Moderate
Sep16Moderate
Oct16Moderate
Nov16Moderate
Dec14Moderate
Almanac & agriculture

Growing season

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

The growing season in Menuma typically lasts about 335 days, from around February 10 to January 10 — the span where a frost-free day is more likely than not. It is reliably frost-free from March 23 to December 5.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDecgrowing seasonFeb 1050%Mar 2390%Dec 590%Jan 1050%
Frost-free chance (%)Frost nights
Jan4831
Feb5628
Mar8521
Apr990
May1000
Jun1000
Jul1000
Aug1000
Sep1000
Oct1000
Nov980
Dec7825

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. Menuma banks about 2,352 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
Apr94
May252
Jun353
Jul480
Aug517
Sep389
Oct221
Nov45
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.

Menuma receives about 3.8 kWh/m² a day of solar energy on average — moderate — with a clear seasonal swing between 2.4 and 5.1 kWh/m².

The brighter stretch of the year lasts 6.4 months, from around Feb 24 to Sep 5. The brightest month is May, averaging about 5.1 kWh/m² (bright).

The dimmest month is December, down near 2.5 kWh/m² — roughly 52% less than the May peak.

0123456JanFebMarAprMayJunJulAugSepOctNovDecdimmerbrighterdimmerdimmoderatebrightMay 55.1 kWhDec 52.4 kWh
Solar energy (kWh/m²)Level
Jan2.9Moderate
Feb3.6Moderate
Mar4.3Bright
Apr4.9Bright
May5.1Bright
Jun4.4Bright
Jul4.3Bright
Aug4.4Bright
Sep3.5Moderate
Oct2.9Moderate
Nov2.6Moderate
Dec2.4Moderate

Where is Menuma?

Menuma sits at 36.2°N, 139.4°E, 29 m above sea level, in Japan. The nearest listed city is Kamikoizumi, 6.0 km away.

Topography around Menuma

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

Within 3 km, the terrain around Menuma has only modest variations in elevation — a maximum elevation change of 23 m around an average of 29 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 270 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,579 m.

The land around Menuma is covered by artificial surfaces (39%) and cropland (36%) within 3 km, artificial surfaces (45%) and cropland (35%) within 16 km, and trees (58%) and artificial surfaces (23%) within 80 km.

3 km
23 m
16 km
270 m
80 km
2,579 m
treesgrasslandcroplandartificial surfacesbare terrainwater
Nearby: Kamikoizumi 6.0 km · Ōta 9.0 km · Fukayachō 9.0 km · Kumagaya 10 km · Ōwa 10 km · Gyōda 11 km · Sakai-nakajima 13 km · Ashikaga 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 Menuma (36.2225°, 139.382°, elevation 29 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. 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).