Chennai from Tokyo

6,426 km, about 8h 45m in the air. Every month scored for the weather at Chennai and for the holidays that crowd it out at both ends.

Chennai in January: sweet spot
Chennai in February: sweet spot
Chennai in March: sweet spot
Chennai in April: avoid
Chennai in May: avoid
Chennai in June: avoid
Chennai in July: avoid
Chennai in August: ok
Chennai in September: ok
Chennai in October: avoid
Chennai in November: avoid
Chennai in December: ok

Sweet spot
Good
OK
Avoid
Busy

Go in Jan–Mar — these months score within a whisker of each other; 28C max, 4 rainy days. Dec is the next best.

Plan this trip

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Things to do

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Mobile data (eSIM)

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Month by month from Tokyo

Month	Max °C	Rain days	Crowds	Typical fare	Verdict	Why
Jan	28°	4d	90	—	sweet spot	28C max, 4 rainy days
Feb	30°	0d	69	—	sweet spot	30C max, 0 rainy days
Mar	33°	1d	82	—	sweet spot	33C max, 1 rainy day
Apr	35°	2d	100	¥92,325	avoid	extreme heat: 13 days over 35C
May	36°	6d	80	—	avoid	extreme heat: 21 days over 35C
Jun	36°	9d	74	—	avoid	extreme heat: 23 days over 35C
Jul	34°	13d	100	—	avoid	extreme heat: 14 days over 35C
Aug	34°	17d	80	—	ok	34C max, 17 rainy days
Sep	33°	15d	100	—	ok	33C max, 15 rainy days
Oct	31°	18d	100	—	avoid	monsoon: 18 rainy days, 236mm
Nov	29°	18d	51	—	avoid	monsoon: 18 rainy days, 359mm
Dec	28°	9d	68	—	ok	28C max, 9 rainy days

Rain days are the days with at least 2 mm of rain.

Crowds is a score out of 100 where higher is quieter. It counts public-holiday clusters in JP as well as at Chennai, which is why this table differs from the same one read from another country. A busy month is a crowded one, not a bad one — usually it is crowded because the weather is good. Crowds alone never make a month “avoid”: that is reserved for weather worth skipping.

How busy it gets

No month stands out as busy; quietest in April and September.

The year in Chennai

Chennai has intense heat from March to May; plan indoor activities during this time. The northeastern monsoon from June to November can cause heavy rainfall and should be considered for travel plans.

Busiest	early Nov to mid Dec — The northeastern monsoon brings moderate rainfall but also cooler temperatures, making it a popular time for tourists.
Quieter, still good	mid Sep to late Oct — Transition period with fewer crowds and decent weather as the rains start to taper off. mid Dec to late Feb — Post-monsoon cool and pleasant weather attracts a moderate number of visitors.
Wet or stormy	early Jun to late Sep — monsoon, moderate early Oct to late Oct — monsoon, severe
Watch out for	extreme heat

Written by a language model from the climate figures above. The month-by-month table is measured — ten years of ERA5 readings and published holiday calendars — and where the two disagree, the table is the one to believe.

Chennai from anywhere · everywhere from Tokyo

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