ムンバイ 8月の天気
ムンバイの8月:猛暑、大雨続き、蒸し暑い — おすすめできない時期(雨の日31日)。
2026年9月更新 · ERA5再解析による気候平年値
ムンバイでは12か月中10位 · 8月に訪れたい旅行先で1413か所中1291位 · 快適スコア41/100(Fランク)
- 日中
- 30°C
- 夜
- 25°C
- 雨の日
- 31
- 日照
- 7.3 h
- 湿度
- 88%
- 日の長さ
- 13 h

ムンバイの8月のようす
Still deep monsoon, and Ganesh Chaturthi (movable, August or September) ends with idols carried into the sea from every neighbourhood.
monsoonfestival
確度:high
8月のムンバイについての旅行者の声
ムンバイのほかの月
Regulars are split on this month more than the general warnings suggest - most call it too hot and humid to recommend, citing the city's island geography as the reason humidity compounds the heat so heavily, while others point out the daytime high isn't far off Toronto's own summer peak and that air-conditioned rooms make it manageable. Our row backs the intensity, 34C reading as a genuinely severe 39C at 72 percent humidity, over 24.7C nights, with rain essentially absent, 0.4mm and zero rainy days. Regulars note evenings and early mornings are meaningfully more bearable than the midday stretch, and that locals routinely go about their day regardless, umbrella or scarf as sun protection rather than for rain. The sea holds 29.8C. The record: 11.7 hours of sun, an 18.4 kph wind and AQI 110.
March opens the pre-monsoon hot season here, which regulars date roughly mid-March to mid-June and rate progressively worse as it goes - April and May are the months to actively avoid, with March the comparatively gentler start of that run. Our row already shows real heat, 33.7C reading as 37C, though the air is genuinely dry for this city at 64.5 percent humidity, before the monsoon arrives around the 15th of June and the moisture returns with it. Rain has essentially stopped, 0.9mm across barely any days. The board's clear preference is the November-to-February window well before this, so a March trip is arriving as that better season closes. The sea is 27.9C. The record: a dew point of 18C, 11.1 hours of sun, a 17.6 kph wind and AQI 139.
Mumbai-forum threads rate December as one of the best months on the calendar, weather-wise - part of the November-to-February window regulars point to as the pleasant, dry season, the antidote to the sticky, stormy stretch that comes before it. Afternoons are still hot and humid, though posters say not too bad, and nights and early mornings turn genuinely pleasant. The record backs the 'not too bad' read on humidity more than the 'pleasant' one on heat: 32.2C days feeling like 35C, 19.4C nights, essentially none at one day for the whole month, and a 26.9C sea. The number forum chat skips past: AQI runs 154 here, one of the worst months of Mumbai's year for air, the trade-off for the dry season's still, cloud-free air.
India-forum threads put the comfortable travel window at November through February, with November described as better than the tail of September and the start of peak tourist season - so book ahead. Mumbai's own November record is the payoff: 34.3C days and 21.7C nights, humidity around 67 percent, ten hours of sun a day, a 28.5C sea, and almost no precipitation at all, under two days on average, as the year turns toward winter. One trade-off comes with the calm: November carries some of the city's worst air of the year, with an AQI near 172, so plan outdoor sightseeing for mornings rather than the hazy afternoon.
通年のメモはムンバイの概要ページにあります。 地図のムンバイのカードから自分のメモを追加できます。
ムンバイの気候平年値 — 8月
ERA5再解析による月平均値です。AQIはその月の平均US AQI(米国大気質指数)です。
8月のムンバイの混雑
その場所自体の混み具合 — 学校休暇や大型連休、編集部がタグ付けした月、そして天気の良さによる人気の高さ。快適スコアには含まれません。
ピークの混雑Narali Purnima (Coconut Day)、Janmashtami and Dahi Handi、主な訪問国のうち4か国で学校休暇(推定)
ピークの混雑混雑ショルダーシーズン閑散
ムンバイの天気が良い月
この旅行先自身の一年間の快適スコアでランキングしています — 混み具合とは別のものです(上の「混雑」を参照)。
天気が厳しいムンバイの天気がピークを迎えるのは12月〜2月で、特に良いのは1月ごろです。
8月はFlooding on the suburban linesと重なります。
天気が最高天気はまずまず天気が厳しい
8月のムンバイのイベント
毎年の季節のイベント、自然の見どころ、休業、祝日 — 厳選し出典を明記しています。
- 要注意
Flooding on the suburban lines
6月15日〜9月15日 · 例年洪水シーズン休業When the tide is high and the rain is heavy the tracks go under and the local trains stop, which strands the city rather than merely slowing it. Keep plans within walking distance on the worst days. 出典 ↗
- 祭り
Narali Purnima (Coconut Day)
8月28日宗教祭事混雑Koli fishing communities in Worli, Versova and other coastal koliwadas offer coconuts to the sea to mark the end of the monsoon fishing ban, with decorated boats and processions on the Shravan full moon. 出典 ↗
- 祭り
Janmashtami and Dahi Handi
8月12日〜9月8日 · 例年宗教祭事混雑The morning after Krishna's birthday, govinda troupes go junction to junction building human pyramids to reach a clay pot of curd strung above the street. Traffic in the older suburbs works around them all day. 出典 ↗
- 季節
Wet season
モンスーンリスク31 rainy days and about 519 mm in the month — the real kind of rainy season, not afternoon showers.
気候の平年値から算出
ムンバイはどこにある?
8月のムンバイ — よくある質問
- 8月はムンバイを訪れるのに良い時期ですか?
- ムンバイの8月:猛暑、大雨続き、蒸し暑い — おすすめできない時期(雨の日31日)。SeasonMapの快適スコアでは、ムンバイの12か月中10位です(41/100)。
- 8月のムンバイはどんな天気ですか?
- 8月のムンバイは、平均最高気温30.2°C、最低気温25.3°C、降水量は約519 mmで、雨の日はおよそ30.7日です。
- 8月のムンバイの大気質はどうですか?
- 8月のムンバイの米国大気質指数(US AQI)は、平均約63です。