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City briefing

Iwai

Japan · 11,000 people
Jan
Feb
Mar
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May
Jun
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Aug
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Dec
The year’s records
Annual mean 16°C · wettest around December · prevailing wind N
Warmest
32.3 °C
Coldest
5.9 °C
Wettest
33%
Windiest
4.6 m/s
Prevailing
N
3.8 m/s average

When this place is good five ratings · thirty-six ten-day sections · click a cell to read it

never good
Jan
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Every reading

bars actual · line feels-like, °C
05101520253035JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember05101520253035JFMAMJJASOND

The average temperature in Iwai over the whole year is 16°C. August is the hottest month, with highs of about 31°C; January is the coldest, with lows of about 3°C.

Month by month Iwai climate by month: average temperatures year round · click a month to read it

MonthHighLowFeels likeChance of rainCloudWindBeing outsideSunWalking
January7°C3°C2°C30%80%3.5 m/s0021
February7°C3°C3°C29%78%3.5 m/s1024
March12°C6°C8°C23%68%3.5 m/s13055
April17°C10°C14°C19%65%3.4 m/s46276
May22°C15°C20°C16%64%3.2 m/s791667
June25°C20°C26°C22%71%2.8 m/s614928
July29°C25°C32°C22%70%2.7 m/s13452
August31°C25°C34°C17%63%2.8 m/s6321
September27°C22°C28°C24%78%2.9 m/s435115
October21°C15°C20°C19%75%3.7 m/s741667
November16°C10°C13°C19%71%3.0 m/s40177
December9°C4°C5°C30%80%3.5 m/s4039

High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.

Seasons, and the year in short Iwai weather by season

Year round, Iwai has days of about 7°C at their warmest in January, its coolest month, and 31°C in August, its warmest; the coolest hours of the day run from 3°C to 25°C through the year, and the average temperature over the year is 16°C around the clock. Rain is most likely around December and least likely around May. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.

Iwai weather in winterDecember to February

High 8°CLow 3°CRain 29%

Winter in Iwai has typical daily highs of about 8°C and lows of about 3°C, with a 29% chance of rain on a given day.

Iwai weather in springMarch to May

High 17°CLow 11°CRain 19%

Spring in Iwai has typical daily highs of about 17°C and lows of about 11°C, with a 19% chance of rain on a given day.

Iwai weather in summerJune to August

High 29°CLow 23°CRain 20%

Summer in Iwai has typical daily highs of about 29°C and lows of about 23°C, with a 20% chance of rain on a given day.

Iwai weather in autumnSeptember to November

High 21°CLow 16°CRain 21%

Autumn in Iwai has typical daily highs of about 21°C and lows of about 16°C, with a 21% chance of rain on a given day.

When is the rainy season in Iwai?

Iwai has no sharply defined rainy season: the chance of rain on a given day runs from 16% in May, the driest month, to 30% in December, the wettest.

What time of year is Iwai windiest?

Winds in Iwai are highest in October, averaging 3.7 m/s (13 km/h), and lightest in July, at 2.7 m/s (10 km/h). The prevailing wind is from the N.

What is the average temperature in Iwai year round?

The average temperature in Iwai over the whole year is 16°C. August is the hottest month, with highs of about 31°C; January is the coldest, with lows of about 3°C.

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