September weather forecast
Grand Baie, Mauritius

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Weather in September

In September, the weather in Grand Baie, Mauritius, initiates a slow return to warmer conditions. Temperatures average between 22.4°C (72.3°F) and 23°C (73.4°F), indicating a nominal rise against August. Sunshine durations see a welcome increase, paving the way for sunbathing and other outdoor activities. Rainfall remains relatively low, ensuring predominantly dry weather conditions. The wind speed, though slightly lower than in August, still provides a cooling sensation against the growing mercury.

Temperature

The coldest time of the year in Grand Baie, Mauritius, is September, with temperatures averaging a high of 23°C (73.4°F) and a low of 22.4°C (72.3°F).

Humidity

The average relative humidity in September in Grand Baie is 76%.

Rainfall

September is the month with the least rainfall in Grand Baie. Rain falls for 17 days and accumulates 13mm (0.51") of precipitation.

Sea temperature

The month with the coldest seawater is September, with an average sea temperature of 23.4°C (74.1°F).
Note: For someone sensitive to cold, swimming in 23.4°C (74.1°F) waters can be invigorating, especially when considering elements like sunshine, wind, and current air temperature. (As a reference, Olympic swimming waters are kept between 25°C (77°F) and 28°C (82.4°F).)

Daylight

In Grand Baie, the average length of the day in September is 11h and 59min.
On the first day of the month, sunrise is at 06:17 and sunset at 18:01. On the last day of September, sunrise is at 05:51 and sunset at 18:07 +04.

Sunshine

In Grand Baie, the average sunshine in September is 7.9h.

UV index

The months with the lowest UV index in Grand Baie, Mauritius, are May through October, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the average person.
Note: The daily high UV index of 6 during September translates into the following recommendations:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Warning! Sand and water reflections boost the intensity of UV exposure.
Updated: Feb 7, 2024 | Published by: Weather Atlas | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What is the coldest time of year in Grand Baie?

Temperature records in Grand Baie, Mauritius, mark September as the coldest month, with highs averaging 23°C (73.4°F) and lows at 22.4°C (72.3°F).

What are the temperatures in Grand Baie in September?

In September, in Grand Baie, the average high-temperature is 23°C (73.4°F), and the average low-temperature is 22.4°C (72.3°F). In April, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is evaluated at 30°C (86°F).

What is the average humidity in September in Grand Baie?

In September, the average relative humidity is 76%.

What is the driest month in Grand Baie?

The month with the least rainfall in Grand Baie, Mauritius, is September, when the rain falls for 17 days and typically collects 13mm (0.51") of precipitation.

How many days does it rain in September in Grand Baie?

In Grand Baie, during September, the rain falls for 17 days and regularly aggregates up to 13mm (0.51") of precipitation.

What is the month with the coldest sea water in Grand Baie?

With an average sea temperature of 23.4°C (74.1°F), September is the month with the coldest seawater.

How warm is the water in September in Grand Baie?

In Grand Baie, in September, the average water temperature is 23.4°C (74.1°F). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 23.4°C (74.1°F) water.

How many hours of daylight does Grand Baie have in September?

In September, the average day length in Grand Baie is 11h and 59min.

When are sunrise and sunset in September in Grand Baie?

On the first day of September, sunrise is at 06:17 and sunset at 18:01. On the last day of the month, sunrise is at 05:51 and sunset at 18:07 +04.

How long on average sun shines in September in Grand Baie?

The average sunshine duration in September is 7.9h.

What is the month with the lowest UV index in Grand Baie?

The months with the lowest UV index in Grand Baie are May through October, with an average maximum UV index of 6.

What is the UV index intensity in September in Grand Baie?

In Grand Baie, Mauritius, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from unprotected exposure to UV radiation.

Average temperature in September
Grand Baie, Mauritius

Average temperature in September - Grand Baie, Mauritius
  • Average high temperature in September: 23°C

The warmest month (with the highest average high temperature) is February (27.7°C).
The month with the lowest average high temperature is September (23°C).

  • Average low temperature in September: 22.4°C

The month with the highest average low temperature is February (27°C).
The coldest month (with the lowest average low temperature) is August (22.1°C).

Average pressure in September
Grand Baie, Mauritius

Average pressure in September - Grand Baie, Mauritius
  • Average pressure in September: 1019.7mbar

The month with the highest atmospheric pressure is August (1020.2mbar).
The month with the lowest atmospheric pressure is February (1011mbar).

Average wind speed in September
Grand Baie, Mauritius

Average wind speed in September - Grand Baie, Mauritius
  • Average wind speed in September: 30.7km/h

The windiest month (with the highest average wind speed) is August (33.2km/h).
The calmest month (with the lowest average wind speed) is February (24km/h).

Average humidity in September
Grand Baie, Mauritius

Average humidity in September - Grand Baie, Mauritius
  • Average humidity in September: 76%

The months with the highest relative humidity are November and December (79%).
The month with the lowest relative humidity is August (74%).

Average rainfall in September
Grand Baie, Mauritius

Average rainfall in September - Grand Baie, Mauritius
  • Average rainfall in September: 13mm

The wettest month (with the highest rainfall) is March (140mm).
The driest month (with the least rainfall) is September (13mm).

Average rainfall days in September
Grand Baie, Mauritius

Average rainfall days in September - Grand Baie, Mauritius
  • Average rainfall days in September: 17 days

The month with the highest number of rainy days is March (21.9 days).
The month with the least rainy days is November (11.6 days).

Average sea temperature in September
Grand Baie, Mauritius

Average sea temperature in September - Grand Baie, Mauritius
  • Average sea temperature in September: 23.4°C

The best month for swimming (with the highest average sea temperature) is March (28.5°C).
The coldest month (with the lowest average sea temperature) is September (23.4°C).

Average daylight in September /
Average sunshine in September
Grand Baie, Mauritius

Average daylight in September / Average sunshine in September - Grand Baie, Mauritius
  • Average daylight in September: 12h and 0min

The month with the longest days is December (Average daylight: 13h and 18min).
The month with the shortest days is June (Average daylight: 10h and 54min).

  • Average sunshine in September: 7h and 5min

The month with the most sunshine is December (Average sunshine: 9h and 48min).
The month with the least sunshine is July (Average sunshine: 6h and 6min).

Average sunshine days in September
Grand Baie, Mauritius

Average sunshine days in September - Grand Baie, Mauritius
  • Average sunshine days in September: 5.7 days

The month with the most sunshine days is November (9.2 days).
The month with the least sunshine days is February (4.4 days).

Average UV index in September
Grand Baie, Mauritius

Average UV index in September - Grand Baie, Mauritius
  • Average UV index in September: 6

The months with the highest UV index are January, February, March, April, November and December (UV index 7).
The months with the lowest UV index are May, June, July, August, September and October (UV index 6).

Average cloud cover in September
Grand Baie, Mauritius

Average cloud cover in September - Grand Baie, Mauritius
  • Average cloud cover in September: 43

The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is May (Cloud cover 40).

Average visibility in September
Grand Baie, Mauritius

Average visibility in September - Grand Baie, Mauritius
  • Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

Grand Baie, Mauritius

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