September weather forecastGanemulla, Sri Lanka
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Ganemulla, Sri Lanka, with temperature in the range of an average high of 29.5°C (85.1°F) and an average low of 25.2°C (77.4°F).Temperature
The shift to September signals an average high-temperature of a still warm 29.5°C (85.1°F), subtly varied from August's 29.3°C (84.7°F). During September, Ganemulla's nighttime temperatures demonstrate a subtle cooling from daytime highs, stabilizing at a still warm 25.2°C (77.4°F).Heat index
September's mean heat index is appraised at a sweltering 36°C (96.8°F). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. 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', evaluates the perceived heat by adding the effect of moisture in the air. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are especially vital to children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.
Humidity
The average relative humidity in September in Ganemulla is 81%.Rainfall
In Ganemulla, in September, during 24.4 rainfall days, 153mm (6.02") of precipitation is typically accumulated. In Ganemulla, during the entire year, the rain falls for 265.4 days and collects up to 1744mm (68.66") of precipitation.Daylight
The average length of the day in September in Ganemulla is 12h and 10min.On the first day of the month, sunrise is at 06:02 and sunset at 18:17. On the last day of September, in Ganemulla, sunrise is at 05:58 and sunset at 18:01 +0530.
Sunshine
In Ganemulla, Sri Lanka, the average sunshine in September is 7.7h.UV index
January through April, July, September, November and December, with an average maximum UV index of 7, are months with the highest UV index in Ganemulla, Sri Lanka. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 7 during September leads to these advisories:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Ganemulla, Sri Lanka
- Average high temperature in September: 29.5°C
The warmest month (with the highest average high temperature) is March (32.1°C).
The month with the lowest average high temperature is July (29.2°C).
- Average low temperature in September: 25.2°C
The month with the highest average low temperature is May (26.4°C).
The coldest month (with the lowest average low temperature) is January (22.8°C).
Average pressure in September
Ganemulla, Sri Lanka
- Average pressure in September: 1009.6mbar
The month with the highest atmospheric pressure is January (1011.7mbar).
The months with the lowest atmospheric pressure are May and June (1008.4mbar).
Average wind speed in September
Ganemulla, Sri Lanka
- Average wind speed in September: 16km/h
The windiest month (with the highest average wind speed) is June (18.3km/h).
The calmest month (with the lowest average wind speed) is March (9.1km/h).
Average humidity in September
Ganemulla, Sri Lanka
- Average humidity in September: 81%
The months with the highest relative humidity are June, July and August (82%).
The months with the lowest relative humidity are January and February (73%).
Average rainfall in September
Ganemulla, Sri Lanka
- Average rainfall in September: 153mm
The wettest month (with the highest rainfall) is June (231mm).
The driest month (with the least rainfall) is January (29mm).
Average rainfall days in September
Ganemulla, Sri Lanka
- Average rainfall days in September: 24.4 days
The month with the highest number of rainy days is August (28.4 days).
The month with the least rainy days is January (9.7 days).
Average daylight in September /
Average sunshine in September
Ganemulla, Sri Lanka
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 12h and 30min).
The month with the shortest days is December (Average daylight: 11h and 42min).
- Average sunshine in September: 7h and 42min
The months with the most sunshine are January, February, March and April (Average sunshine: 9h and 12min).
The month with the least sunshine is November (Average sunshine: 6h and 36min).
Average sunshine days in September
Ganemulla, Sri Lanka
- Average sunshine days in September: 3 days
The month with the most sunshine days is January (20 days).
The month with the least sunshine days is August (1.2 days).
Average UV index in September
Ganemulla, Sri Lanka
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, July, September, November and December (UV index 7).
The months with the lowest UV index are May, June, August and October (UV index 6).
Average cloud cover in September
Ganemulla, Sri Lanka
- Average cloud cover in September: 55
The month with the most cloud cover is June (Cloud cover 57).
The month with the least cloud cover is January (Cloud cover 21).
Average visibility in September
Ganemulla, Sri Lanka
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, June, July, September and December (10km).
The months with the lowest visibility are May, August, October and November (9km).
