Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The arrival of September denotes a barely perceptible change in the average high-temperatures to a still moderately hot 26.3°C (79.3°F) from August's 25.8°C (78.4°F). An average low-temperature of 22.5°C (72.5°F), slightly less than the daytime peak, marks the month of September.Humidity
In September, the average relative humidity is 74%.Rainfall
The month with the least rainfall is September, when the rain falls for 18.5 days and typically collects 22mm (0.87") of precipitation.Sea temperature
July through October, with an average sea temperature of 26°C (78.8°F), are months with the coldest seawater.Note: Surface water temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are considered superb and highly pleasant for water activities over extended periods.
Daylight
In September, the average length of the day is 12h and 2min.On the first day of September, sunrise is at 05:50 and sunset at 17:42. On the last day of the month, sunrise is at 05:30 and sunset at 17:43 EAT.
Sunshine
In September, the average sunshine is 9.6h.UV index
January, June through September, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the average person.Note: A daily high UV index of 6 in September leads to these guidelines:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Take note! The UV strength of the Sun elevates when reflected off water and sand.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
What months are the sea coldest?
What is the sea water temperature in September?
How many hours of daylight does Andriana have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Andriana have in September?
What is the month with the lowest UV index in Andriana?
What is the UV index reading in September?
Average temperature in September
Andriana, Madagascar
- Average high temperature in September: 26.3°C
The warmest month (with the highest average high temperature) is March (28.8°C).
The month with the lowest average high temperature is August (25.8°C).
- Average low temperature in September: 22.5°C
The month with the highest average low temperature is January (26.1°C).
The coldest month (with the lowest average low temperature) is July (22.2°C).
Average pressure in September
Andriana, Madagascar
- Average pressure in September: 1016.5mbar
The month with the highest atmospheric pressure is August (1017mbar).
The month with the lowest atmospheric pressure is February (1010.7mbar).
Average wind speed in September
Andriana, Madagascar
- Average wind speed in September: 11.1km/h
The windiest month (with the highest average wind speed) is January (11.8km/h).
The calmest month (with the lowest average wind speed) is April (8.8km/h).
Average humidity in September
Andriana, Madagascar
- Average humidity in September: 74%
The months with the highest relative humidity are January, February and March (78%).
The month with the lowest relative humidity is July (72%).
Average rainfall in September
Andriana, Madagascar
- Average rainfall in September: 22mm
The wettest month (with the highest rainfall) is January (417mm).
The driest month (with the least rainfall) is September (22mm).
Average rainfall days in September
Andriana, Madagascar
- Average rainfall days in September: 18.5 days
The month with the highest number of rainy days is March (29.8 days).
The month with the least rainy days is June (18.3 days).
Average sea temperature in September
Andriana, Madagascar
- Average sea temperature in September: 26°C
The best months for swimming (with the highest average sea temperature) are January, February, March and April (29°C).
The coldest months (with the lowest average sea temperature) are July, August, September and October (26°C).
Average daylight in September /
Average sunshine in September
Andriana, Madagascar
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 12h and 54min).
The month with the shortest days is June (Average daylight: 11h and 24min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is December (Average sunshine: 10h and 48min).
The month with the least sunshine is June (Average sunshine: 7h and 24min).
Average sunshine days in September
Andriana, Madagascar
- Average sunshine days in September: 6.4 days
The month with the most sunshine days is July (9.2 days).
The months with the least sunshine days are January and April (0.8 days).
Average UV index in September
Andriana, Madagascar
- Average UV index in September: 6
The months with the highest UV index are February, March, April, May, October, November and December (UV index 7).
The months with the lowest UV index are January, June, July, August and September (UV index 6).
Average cloud cover in September
Andriana, Madagascar
- Average cloud cover in September: 25
The month with the most cloud cover is January (Cloud cover 46).
The months with the least cloud cover are May and June (Cloud cover 23).
Average visibility in September
Andriana, Madagascar
- Average visibility in September: 10km
The months with the highest visibility are April, May, June, July, August, September, October and November (10km).
The months with the lowest visibility are January, February, March and December (9km).
Andriana, Madagascar
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