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Mumbai in September: Weather, Average temperature and Climate

Planning a trip and want to know what the weather in Mumbai in September will be like? Take a look at our weather guide for Mumbai, based on historical data.
Check flight prices to Mumbai on Avionero:
September

Weather in Mumbai in September 2025

OK Weather
Warm
🌧️
Rainy
🌊
Very warm water
If you plan to visit Mumbai in September, the weather is typically alright, with an average high temperature of +84°F during the day and approximately 1 sunny days. Expect some rainy, though, as there are typically 18 rainy days in the month and around 170 mm of precipitation. The weather is changeable so you may have to pack for every eventuality. Search flights in one click on Avionero.

Average weather

☀️
+84°F
Avg. max. temperature
+73°F
Min.
+97°F
Max.
170 mm
Total precipitation
82%
Avg. humidity
2 m/s
Avg. wind
1 ☀️
Sunny Days
4 ⛅️
Cloudy
18 🌦
Rainy
Our opinion: Mumbai has OK weather in September.

Average temperature in Mumbai in September

Here are the expected maximum, average and minimum temperatures in Mumbai for September based on the historical data.
Last Year
Historical Data

Going from a maximum of +90°F during the day to a minimum of +79°F during the night, the temperature in September averages around +84°F.

The average maximum temperature goes up 17% by the end of the month, compared with the beginning of the month, from +88°F to +90°F.

Is Mumbai warm or cold in September?

Mumbai is typically warm in September.

Maximum temperatures go up compared to the previous month from +82°F to +84°F. The minimum temperature also goes up from +79°F to +79°F.

It’s generally warm, but pack a long-sleeve shirt for evenings.

Take a look at how September is compared to other months in Mumbai:

Water temperature in Mumbai in September

Water in Mumbai in September is Very warm. It varies from +80°F to +87°F, with an average of +83°F. This is almost similar to the air temperature, which averages +84°F.

In September, water temperatures are average relative to the rest of the year:

The warmest water temperatures in Mumbai are reached in June, when the average sea temperature rises to +86°F. The coldest water temperatures are in February, with an average of +77°F.

Can you swim in Mumbai in September?

You can definitely swim in Mumbai in September, the water is very warm (+83°F in average), and might even be unpleasant for ones who like it more fresh.
🦭
Cold
Below +61°F
🏄‍♂️
Fresh
61°F - 70°F
🏊
Comfortable
70°F - 77°F
👙
Warm
77°F - 82°F
🔥
Very warm
+82°C and up
Don't forget sunscreen and a hat, it's going to be hot!

Climate in Mumbai in September

Mumbai weather looks like this, on average, in September and the surrounding months.
AugustSeptemberOctober
Avg. temperature
+82°F+84°F+88°F
Min. temperature
+73°F+73°F+70°F
Max. temperature
+93°F+97°F+100°F
Rainfall
339 mm170 mm37 mm
Wind
4 m/s2 m/s1 m/s
Avg. water temperature
+83°F+83°F+84°F
Humidity
84%82%71%
Air pressure
1005 HPa1006 HPa1009 HPa
Sunny days
0114
Cloudy days
148
Rainy days
28184
Snowy days
000

September weather is still as ok as in August. It’s getting warmer as September arrives. The average maximum temperature goes up from +82°F to +84°F during the day. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 339 mm to 170 mm. It feels drier, as humidity decreases from 84% to 82%. Winds are calmer in comparison to August, going down from 4 m/s to 2 m/s on average. The good news is there are likely to be more sunny days in September, from 0 to 1.

But maybe it is worth considering traveling in October as the weather gets better.

Wind

Wind speed in Mumbai in September based on historical data.
Last Year
Historical Data

The average wind speed is 3 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.

The average wind speed in Mumbai is gradually decreasing during September, going from 3 m/s to 2 m/s over the course of the month.

Rain

Amount of rainfall in mm during September in Mumbai based on historical data.
Last Year
Historical Data
Typically, there is a 87% chance of rain on an average day in September, with total rainfall of approximately 185 mm. The maximum amount of rainfall per day is around 52 mm, which is considered heavy rain. September is a pretty wet month with over 26 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
Here’s how September is compared with other months in the amount of precipitation, total mm:
Mumbai wettest month is July, where a typical day has a 90% chance of precipitation and 489 mm of rainfall per day. January, on the other hand, is the driest month with a mere 0% chance of precipitation and 0 mm of rainfall per day.

How was the weather last September in Mumbai?

This is the weather in Mumbai in September 2023:
1 September
🌫️
+88°F
2 September
🌫️
+83°F
3 September
🌫️
+84°F
4 September
🌫️
+86°F
5 September
🌫️
+86°F
6 September
🌫️
+87°F
7 September
🌧️
+83°F
8 September
🌧️
+81°F
9 September
🌫️
+83°F
10 September
🌫️
+85°F
11 September
🌫️
+86°F
12 September
🌫️
+86°F
13 September
🌫️
+86°F
14 September
🌫️
+86°F
15 September
🌫️
+87°F
16 September
🌫️
+84°F
17 September
🌧️
+85°F
18 September
🌧️
+85°F
19 September
🌫️
+85°F
20 September
🌫️
+85°F
21 September
🌫️
+86°F
22 September
🌫️
+83°F
23 September
🌧️
+83°F
24 September
🌫️
+81°F
25 September
🌫️
+84°F
26 September
🌫️
+85°F
27 September
🌫️
+84°F
28 September
🌫️
+87°F
29 September
🌫️
+89°F
30 September
🌫️
+89°F
In September 2023 Mumbai had 0 sunny days, 0 cloudy days, and 5 rainy days. The average maximum temperature was +84°F, with an absolute maximum of +90°F and a minimum of +81°F. The average humidity was 87%, with a maximum of 100% and a minimum of 72%. The average wind speed was 3 m/s, with a maximum of 10 m/s and a minimum of 0 m/s.
Are you planning a trip in September?

Climate Change Over the Years

This is how Mumbai climate has changed over the last 43 years.

The climate in Mumbai in September has not changed that much over the last 43 years.

The average temperature was the lowest in 1983 (+84°F) and the highest in 2018 (+90°F). The driest year was 2012 with only 652 mm of rainfall, and the wettest year was 1983 with 2618 mm.

FAQ

Frequently asked questions about the weather in Mumbai in September:

Is September a good time to visit Mumbai?

It’s always a good time to visit Mumbai, but the weather is changeable in September, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.

Can you sunbathe in Mumbai in September?

September is warm in Mumbai. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.

Can you swim in Mumbai in September?

Yes, you can swim in Mumbai in September, the water is very warm, with temperature averaging at +83°F, but it's important to manage hydration and sun exposure.

Is Mumbai rainy in September?

Mumbai is often rainy in September. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.

Is it sunny in Mumbai in September?

Usually, it’s not very sunny in Mumbai in September, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.

Other cities in India

Check out the weather for other cities in India.

Monthly weather in Mumbai

Source of the data

For this page, we’ve looked at the typical weather in Mumbai, based on historical hourly weather data from January 1, 1979, to December 31, 2023.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.