September weather forecastMorne Longue, Grenada
September
Weather in September
September ushers in a cooler period, as the temperature lowers slightly to 28.1°C (82.6°F). Despite the city being in the throes of the rainy season, the rainfall decreases to 88mm (3.46"). The city experiences a decrease in daylight hours to 12.2 hours, signaling the onset of shorter days. Unusually, September witnesses a minimal chance of snowfall. Wind speeds reduce to 21.6km/h (13.4mph), ushering in a tranquillity that is characteristic of the approaching end-of-year period.Temperature
September stands out as Morne Longue's warmest month, with temperatures ranging between an average high of 28.8°C (83.8°F) and a low of 28.1°C (82.6°F).Heat index
The heat index value during September is evaluated at a tropical 33°C (91.4°F). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.Factoring in the heat index, values are geared towards shaded areas with light breezes. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. 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 quite important for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
Humidity
January, February and September, with an average relative humidity of 76%, are the least humid months.Rainfall
In September, the rain falls for 22.6 days. Throughout September, 88mm (3.46") of precipitation is accumulated. Throughout the year, in Morne Longue, there are 249.7 rainfall days, and 774mm (30.47") of precipitation is accumulated.Snowfall
The only month with snowfall is September. The month with the most snowfall days in Morne Longue is September, when snow falls for 0.1 days.Daylight
In Morne Longue, the average length of the day in September is 12h and 11min.On the first day of September, sunrise is at 05:56 and sunset at 18:16. On the last day of the month, sunrise is at 05:55 and sunset at 17:57 AST.
Sunshine
The average sunshine in September is 10.5h.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 reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the maximum UV index of 7 translates into these guidelines:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Morne Longue, Grenada
- Average high temperature in September: 28.8°C
The warmest month (with the highest average high temperature) is September (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
Morne Longue, 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 (1010.8mbar).
Average wind speed in September
Morne Longue, Grenada
- Average wind speed in September: 21.6km/h
The windiest month (with the highest average wind speed) is February (29.9km/h).
The calmest month (with the lowest average wind speed) is September (21.6km/h).
Average humidity in September
Morne Longue, 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 January, February and September (76%).
Average rainfall in September
Morne Longue, Grenada
- Average rainfall in September: 88mm
The wettest month (with the highest rainfall) is October (122mm).
The driest month (with the least rainfall) is February (26mm).
Average rainfall days in September
Morne Longue, Grenada
- Average rainfall days in September: 22.6 days
The month with the highest number of rainy days is August (25.1 days).
The month with the least rainy days is April (16 days).
Average snowfall days in September
Morne Longue, Grenada
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is September (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Morne Longue, 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 30min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in September
Morne Longue, Grenada
- Average sunshine days in September: 5 days
The month with the most sunshine days is March (7.8 days).
The month with the least sunshine days is August (3.3 days).
Average UV index in September
Morne Longue, 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
Morne Longue, Grenada
- Average cloud cover in September: 35
The months with the most cloud cover are June, July and November (Cloud cover 42).
The month with the least cloud cover is September (Cloud cover 35).
Average visibility in September
Morne Longue, 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).
