September weather forecastSaint-Philippe, Reunion
September
Weather in September
September marks a discernible shift from winter to spring in Saint-Philippe's weather. Although the high temperature only slightly increases to 21.4°C (70.5°F), it acts as the precursor to warmer weather. A marginal uptick in precipitation to 19mm (0.75") breaks the run of drier months, signaling the season shift. A decreasing cloud percentage of 24% alongside a UV index of 5 still calls for protection from the sun. With increasing hours of sunshine combined with a steady sea temperature of 23.6°C (74.5°F), the latter part of the year promises an inviting climate.Temperature
The average high-temperature in September, at a still pleasant 21.4°C (70.5°F), reveals a modest deviation from August's 20.9°C (69.6°F). Saint-Philippe documents a consistent average low-temperature of 18.6°C (65.5°F) at night during September.Humidity
August and September, with an average relative humidity of 78%, are the least humid months in Saint-Philippe, Reunion.Rainfall
September is the month with the least rainfall in Saint-Philippe, Reunion. Rain falls for 15.6 days and accumulates 19mm (0.75") of precipitation.Sea temperature
September is the month with the coldest seawater in Saint-Philippe, with an average sea temperature of 23.6°C (74.5°F).Note: Every individual's cold threshold differs, but factors like today's sunshine, wind, and temperature can tip the scales for a delightful swim in 23.6°C (74.5°F) waters. For reference, Olympians swim in waters of 25°C (77°F) to 28°C (82.4°F).
Daylight
In Saint-Philippe, the average length of the day in September is 11h and 59min.On the first day of September in Saint-Philippe, sunrise is at 06:25 and sunset at 18:07. On the last day of the month, sunrise is at 05:58 and sunset at 18:15 +04.
Sunshine
The average sunshine in September is 9.1h.UV index
April, June through September, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: A daily maximum UV index of 5 in September translates into the following instructions:
Act with care - Obligation to protect against skin and eye damage is highlighted. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Notice! The reflection of water and sand increases the UV radiation significantly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Saint-Philippe, Reunion
- Average high temperature in September: 21.4°C
The warmest month (with the highest average high temperature) is February (25.9°C).
The month with the lowest average high temperature is July (20.7°C).
- Average low temperature in September: 18.6°C
The months with the highest average low temperature are January, February and March (23.3°C).
The coldest month (with the lowest average low temperature) is August (17.8°C).
Average pressure in September
Saint-Philippe, Reunion
- Average pressure in September: 1020.9mbar
The month with the highest atmospheric pressure is August (1021.4mbar).
The month with the lowest atmospheric pressure is February (1011.1mbar).
Average wind speed in September
Saint-Philippe, Reunion
- Average wind speed in September: 17.1km/h
The windiest month (with the highest average wind speed) is July (18.2km/h).
The calmest months (with the lowest average wind speed) are November and December (12.5km/h).
Average humidity in September
Saint-Philippe, Reunion
- Average humidity in September: 78%
The month with the highest relative humidity is March (83%).
The months with the lowest relative humidity are August and September (78%).
Average rainfall in September
Saint-Philippe, Reunion
- Average rainfall in September: 19mm
The wettest month (with the highest rainfall) is January (193mm).
The driest month (with the least rainfall) is September (19mm).
Average rainfall days in September
Saint-Philippe, Reunion
- Average rainfall days in September: 15.6 days
The month with the highest number of rainy days is March (26.2 days).
The month with the least rainy days is September (15.6 days).
Average sea temperature in September
Saint-Philippe, Reunion
- Average sea temperature in September: 23.6°C
The best months for swimming (with the highest average sea temperature) are February and March (28.3°C).
The coldest month (with the lowest average sea temperature) is September (23.6°C).
Average daylight in September /
Average sunshine in September
Saint-Philippe, Reunion
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 24min).
The month with the shortest days is June (Average daylight: 10h and 54min).
- Average sunshine in September: 9h and 6min
The month with the most sunshine is October (Average sunshine: 10h and 30min).
The months with the least sunshine are May, June and July (Average sunshine: 6h and 42min).
Average sunshine days in September
Saint-Philippe, Reunion
- Average sunshine days in September: 4.3 days
The month with the most sunshine days is October (6.6 days).
The month with the least sunshine days is February (1.1 days).
Average UV index in September
Saint-Philippe, Reunion
- Average UV index in September: 5
The months with the highest UV index are January, February, March, May, October, November and December (UV index 6).
The months with the lowest UV index are April, June, July, August and September (UV index 5).
Average cloud cover in September
Saint-Philippe, Reunion
- Average cloud cover in September: 24
The months with the most cloud cover are February and March (Cloud cover 41).
The month with the least cloud cover is September (Cloud cover 24).
Average visibility in September
Saint-Philippe, Reunion
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
