September weather forecastCoonoor, India
September
Weather in September
September, the last month of the rainy (monsoon) season in Coonoor, is also a moderately hot month, with temperature in the range of an average high of 28.3°C (82.9°F) and an average low of 19.4°C (66.9°F).Temperature
September's onset brings an average high-temperature of a still warm 28.3°C (82.9°F), showing a minute difference from August's 27.3°C (81.1°F). Coonoor experiences a mean temperature of 19.4°C (66.9°F) during September nights.Heat index
September's mean heat index is appraised at a hot 32°C (89.6°F). If activity and exposure persist, they could induce fatigue, leading to possible heat cramps.Understanding the heat index involves considering values for shaded locales with light wind. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', reflects the blend of air temperature and relative humidity to give a temperature impression. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
Humidity
In Coonoor, the average relative humidity in September is 77%.Rainfall
In Coonoor, in September, it is raining for 25.8 days, with typically 142mm (5.59") of accumulated precipitation. Throughout the year, in Coonoor, there are 243.6 rainfall days, and 1388mm (54.65") of precipitation is accumulated.Daylight
In September, the average length of the day is 12h and 11min.On the first day of September, sunrise is at 6:12 am and sunset at 6:32 pm. On the last day of the month, sunrise is at 6:11 am and sunset at 6:13 pm IST.
Sunshine
The average sunshine in September in Coonoor is 8.6h.UV index
In Coonoor, India, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: A maximum high UV index of 6 in September translates into the following recommendations:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Coonoor, India
- Average high temperature in September: 28.3°C
The warmest month (with the highest average high temperature) is April (32.5°C).
The month with the lowest average high temperature is November (25.7°C).
- Average low temperature in September: 19.4°C
The month with the highest average low temperature is May (20.8°C).
The coldest month (with the lowest average low temperature) is January (15.4°C).
Average pressure in September
Coonoor, India
- Average pressure in September: 1010mbar
The month with the highest atmospheric pressure is January (1013.4mbar).
The months with the lowest atmospheric pressure are May and June (1008.8mbar).
Average wind speed in September
Coonoor, India
- Average wind speed in September: 6.9km/h
The windiest month (with the highest average wind speed) is July (9.2km/h).
The calmest month (with the lowest average wind speed) is November (4.6km/h).
Average humidity in September
Coonoor, India
- Average humidity in September: 77%
The month with the highest relative humidity is November (82%).
The month with the lowest relative humidity is March (56%).
Average rainfall in September
Coonoor, India
- Average rainfall in September: 142mm
The wettest month (with the highest rainfall) is October (247mm).
The driest month (with the least rainfall) is January (13mm).
Average rainfall days in September
Coonoor, India
- Average rainfall days in September: 25.8 days
The month with the highest number of rainy days is May (27.9 days).
The month with the least rainy days is January (5.8 days).
Average daylight in September /
Average sunshine in September
Coonoor, India
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 12h and 48min).
The month with the shortest days is December (Average daylight: 11h and 30min).
- Average sunshine in September: 8h and 36min
The month with the most sunshine is May (Average sunshine: 9h and 54min).
The month with the least sunshine is November (Average sunshine: 6h and 24min).
Average sunshine days in September
Coonoor, India
- Average sunshine days in September: 2.5 days
The month with the most sunshine days is January (22.3 days).
The month with the least sunshine days is May (0.8 days).
Average UV index in September
Coonoor, India
- Average UV index in September: 6
The month with the highest UV index is March (UV index 7).
The months with the lowest UV index are October and December (UV index 5).
Average cloud cover in September
Coonoor, India
- Average cloud cover in September: 38
The month with the most cloud cover is July (Cloud cover 45).
The month with the least cloud cover is February (Cloud cover 13).
Average visibility in September
Coonoor, India
- Average visibility in September: 9km
The months with the highest visibility are February, March, April and June (10km).
The months with the lowest visibility are October, November and December (8km).
