September weather forecastCalliste, Grenada
September
Weather in September
September, the first month of the autumn in Calliste, is still a warm month, with an average temperature varying between 28.1°C (82.6°F) and 28.8°C (83.8°F).Temperature
September and October are characterised by peak temperatures, with an average high of 28.8°C (83.8°F).Heat index
September's average heat index is appraised at a hot 33°C (91.4°F). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.Keep in mind the heat index values are meant for areas in shade and with light wind. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Humidity
The months with the lowest humidity in Calliste are February and September, with an average relative humidity of 76%.Rainfall
In Calliste, in September, it is raining for 20.4 days, with typically 78mm (3.07") of accumulated precipitation. In Calliste, during the entire year, the rain falls for 232 days and collects up to 739mm (29.09") of precipitation.Daylight
In September, the average length of the day in Calliste is 12h and 11min.On the first day of the month, sunrise is at 05:56 and sunset at 18:17. On the last day of September, sunrise is at 05:56 and sunset at 17:57 AST.
Sunshine
August and September, with an average of 10.6h of sunshine, are months with the most sunshine.UV index
January through December, with an average maximum UV index of 7, are months with the highest UV index. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.Note: In September, the maximum UV index of 7 translates into these guidelines:
Shield from overexposure. Defense against sun-related harm is required. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Calliste, Grenada
- Average high temperature in September: 28.8°C
The warmest months (with the highest average high temperature) are September and October (28.8°C).
The month with the lowest average high temperature is February (26.7°C).
- Average low temperature in September: 28.1°C
The month with the highest average low temperature is September (28.1°C).
The coldest month (with the lowest average low temperature) is February (25.8°C).
Average pressure in September
Calliste, Grenada
- Average pressure in September: 1012mbar
The month with the highest atmospheric pressure is June (1014.2mbar).
The month with the lowest atmospheric pressure is November (1010.7mbar).
Average wind speed in September
Calliste, Grenada
- Average wind speed in September: 21.5km/h
The windiest month (with the highest average wind speed) is February (29.4km/h).
The calmest month (with the lowest average wind speed) is September (21.5km/h).
Average humidity in September
Calliste, Grenada
- Average humidity in September: 76%
The months with the highest relative humidity are May, June and July (79%).
The months with the lowest relative humidity are February and September (76%).
Average rainfall in September
Calliste, Grenada
- Average rainfall in September: 78mm
The wettest month (with the highest rainfall) is October (110mm).
The driest month (with the least rainfall) is April (25mm).
Average rainfall days in September
Calliste, Grenada
- Average rainfall days in September: 20.4 days
The months with the highest number of rainy days are July and August (22.3 days).
The month with the least rainy days is April (14.8 days).
Average daylight in September /
Average sunshine in September
Calliste, Grenada
- 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 24min).
- Average sunshine in September: 10h and 36min
The months with the most sunshine are August and September (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in September
Calliste, Grenada
- Average sunshine days in September: 7.5 days
The months with the most sunshine days are April and October (9.2 days).
The month with the least sunshine days is July (4.6 days).
Average UV index in September
Calliste, Grenada
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover in September
Calliste, Grenada
- Average cloud cover in September: 35
The month with the most cloud cover is November (Cloud cover 43).
The month with the least cloud cover is September (Cloud cover 35).
Average visibility in September
Calliste, Grenada
- 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).
