Mumbai is 0.8°C (1.4°F) warmer by day, Chennai has 3.2°C (5.8°F) warmer nights, Mumbai gets 1,110 mm (43.7 in) more rain a year.
Chennai is at its warmest in May and coolest in January, while Mumbai peaks in April and bottoms out in January. Month for month, Chennai is the warmer of the two in 9 of 12 months.
Mumbai is the wetter of the two, collecting 2,354 mm (92.7 in) of rain a year against 1,244 mm (49 in) in Chennai. The most comfortable time to visit is January, November and December in Chennai and January, November and December in Mumbai.
| Chennai | Metric | Mumbai |
|---|---|---|
| 🌡️ Temperature | ||
| 34.9°C | 🌡️Average daytime high | 35.7°C |
| 22.6°C | 🌙Average nighttime low | 19.4°C |
| May | 🔥Hottest month | April |
| January | ❄️Coldest month | January |
| 🌧️ Rain | ||
| 1,244 mm | 🌧️Annual rainfall | 2,354 mm |
| November | ☔Wettest month | July |
| March | 🏜️Driest month | January |
| 💨 Climate | ||
| 72% | 💧Average humidity | 67% |
| 3.2 m/s | 💨Average wind speed | 2.6 m/s |
Overnight, Chennai typically falls to around 22.6°C (72.7°F) while Mumbai settles near 19.4°C (66.9°F).
Chennai is hottest in May and coldest in January, whereas Mumbai peaks in April and is coolest in January.
Chennai sees the most rain in November and the least in March; Mumbai is wettest in July and driest in January.
Chennai feels the more humid of the two, averaging 72% relative humidity against 67%.
For Mumbai, the pick of the year is January, November and December.
Month by month, here is the coldest night, the average day and the hottest afternoon each city can expect. Switch Compare to read rainfall, humidity, wind or solar instead, and Period to move between the long-term 45-year average and any single year — the shading is a quick warm-to-cool guide.
| Month | Chennai | Mumbai | ||||
|---|---|---|---|---|---|---|
| Min | Avg | Max | Min | Avg | Max | |
| January | 18.9 | 24.3 | 29.8 | 12.7 | 24.1 | 35.5 |
| February | 19.5 | 26.4 | 33.4 | 14.5 | 26.7 | 38.9 |
| March | 21.2 | 29.3 | 37.3 | 17.8 | 30 | 42.3 |
| April | 24.2 | 31.8 | 39.5 | 20.9 | 32 | 43 |
| May | 26 | 33.3🔥 | 40.5 | 24 | 32.7🔥 | 41.5 |
| June | 25.1 | 31.8 | 38.4 | 24.8 | 30.9 | 36.9 |
| July | 24.5 | 30.8 | 37 | 24.1 | 27.3 | 30.4 |
| August | 24.3 | 30.2 | 36.2 | 23.4 | 26.5 | 29.6 |
| September | 23.8 | 29.2 | 34.7 | 22.3 | 27.1 | 31.8 |
| October | 23 | 28 | 33.1 | 18.4 | 25.8 | 33.3 |
| November | 20.8 | 25.5 | 30.3 | 15.8 | 24.3 | 32.7 |
| December | 19.6 | 24.2❄️ | 28.8 | 13.6 | 23.3❄️ | 33.1 |
| Annual Avg | 22.6 | 28.7 | 34.9 | 19.4 | 27.6 | 35.8 |
Min / mean / max temperature (°C). 🔥 marks each city's hottest month, ❄️ its coldest; shading runs cool blue to warm red.
The same figures plotted out, so the shape of a typical year is easier to see than in a grid. Where the two lines run close together Chennai and Mumbai feel alike; where they separate, they are genuinely different places to be.
Hover or tap any point to read the exact figures. Chennai Mumbai
See how Chennai and Mumbai stack up against other cities. Swipe for more.
Choose which city to keep, then search for any other city in our database — we'll build the comparison for you.
Quick answers to the questions people ask most when comparing Chennai and Mumbai — each drawn straight from the climate figures above.
Mumbai is the warmer of the two. It averages daytime highs of 35.7°C (96.3°F) against 34.9°C (94.8°F) in Chennai — roughly 0.8°C (1.4°F) warmer by day. Nights are milder in Chennai, with average lows of 22.6°C (72.7°F) versus 19.4°C (66.9°F).
Chennai is hottest in May, averaging highs of about 40.5°C (105°F), while Mumbai peaks in April at around 43°C (109.5°F). That makes Mumbai the hotter of the two at the height of summer.
Mumbai gets colder. In its coldest month (January) overnight lows average about 12.7°C (54.8°F), compared with 18.9°C (66°F) at the low point of the year in Chennai.
Mumbai is the wetter city, collecting about 2,354 mm (92.7 in) of rain a year versus 1,244 mm (49 in) in Chennai. Chennai is wettest in November and driest in March; Mumbai is wettest in July and driest in January.
Chennai is the more humid of the two, averaging 72% relative humidity over the year against 67% in Mumbai.
The most comfortable months in Chennai are January, November and December, when average temperatures are at their mildest.
Mumbai is at its most pleasant around January, November and December, based on the mildest average temperatures of the year.
Chennai is the warmer city in 9 of the 12 months of the year. The gap is widest in August, about 3.7°C (6.7°F), and narrowest in January, about 0.2°C (0.4°F).
Both have a similar seasonal range — around 9.4°C (16.9°F) between the coldest and hottest months — so neither climate is noticeably more extreme than the other.
It depends what matters most to you: choose Mumbai for warmer weather, pick Chennai if you prefer drier conditions and go for Mumbai if you want lower humidity. There is no single "better" climate — it comes down to whether you value warmth, dryness or comfort most.
Every figure on this page is calculated from NASA POWER satellite climate data spanning 1981–2025 (45 years). The averages describe the long-term climate of Chennai and Mumbai, not a single year's weather or a short-range forecast.
