September weather forecastHarris, Montserrat
September
Weather in September
As Harris, Montserrat gears up to welcome autumn, September brings with it an uptick in rainfall, registering 87mm (3.43"). Concurrently, the temperatures show a minor upward move compared to August. September also sees a slight decrease in wind speed to an average of 20.5km/h (12.7mph). Despite minor climatic shifts, relative humidity remains constant. October promises cooler temperatures but higher rainfall.Temperature
Harris, Montserrat, notes the warmest temperatures in September, with a high average of 28.9°C (84°F) and a low of 27.8°C (82°F).Heat index
September's heat index is estimated at a hot 34°C (93.2°F). Exercise increased caution, heat cramps and heat exhaustion are potential hazards. Continuous activity could lead to heatstroke.Heat index data is primarily for areas with shade and subjected to light winds. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', reflects the blend of air temperature and relative humidity to give a temperature impression. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
Humidity
The average relative humidity in September is 76%.Rainfall
In September, the rain falls for 23.2 days. Throughout September, 87mm (3.43") of precipitation is accumulated. Throughout the year, in Harris, there are 266.4 rainfall days, and 724mm (28.5") of precipitation is accumulated.Daylight
In September, the average length of the day in Harris, Montserrat, is 12h and 13min.On the first day of the month, sunrise is at 05:55 and sunset at 18:21. On the last day of September, in Harris, Montserrat, sunrise is at 05:58 and sunset at 17:58 AST.
Sunshine
In September, the average sunshine in Harris is 10.8h.UV index
January through December, with an average maximum UV index of 7, are months with the highest UV index in Harris. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Harris. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: During September, 7 as the daily maximum UV index converts into the following advice:
Prevent overexposure. Protection from the sun's harmful effects is needed. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Harris, Montserrat
- Average high temperature in September: 28.9°C
The warmest month (with the highest average high temperature) is September (28.9°C).
The month with the lowest average high temperature is March (26.1°C).
- Average low temperature in September: 27.8°C
The month with the highest average low temperature is September (27.8°C).
The coldest month (with the lowest average low temperature) is February (24.9°C).
Average pressure in September
Harris, Montserrat
- Average pressure in September: 1013.1mbar
The months with the highest atmospheric pressure are January and June (1016mbar).
The months with the lowest atmospheric pressure are October and November (1012.4mbar).
Average wind speed in September
Harris, Montserrat
- Average wind speed in September: 20.5km/h
The windiest month (with the highest average wind speed) is July (27km/h).
The calmest month (with the lowest average wind speed) is October (19.8km/h).
Average humidity in September
Harris, Montserrat
- Average humidity in September: 76%
The months with the highest relative humidity are May, July and August (78%).
The months with the lowest relative humidity are January, February and March (75%).
Average rainfall in September
Harris, Montserrat
- Average rainfall in September: 87mm
The wettest month (with the highest rainfall) is October (101mm).
The driest months (with the least rainfall) are February and March (27mm).
Average rainfall days in September
Harris, Montserrat
- Average rainfall days in September: 23.2 days
The month with the highest number of rainy days is December (24.4 days).
The month with the least rainy days is March (18.7 days).
Average daylight in September /
Average sunshine in September
Harris, Montserrat
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 13h and 6min).
The month with the shortest days is December (Average daylight: 11h and 12min).
- Average sunshine in September: 10h and 48min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The months with the least sunshine are November and December (Average sunshine: 6h and 42min).
Average sunshine days in September
Harris, Montserrat
- Average sunshine days in September: 3.9 days
The month with the most sunshine days is March (5.9 days).
The month with the least sunshine days is July (1.8 days).
Average UV index in September
Harris, Montserrat
- 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
Harris, Montserrat
- Average cloud cover in September: 35
The months with the most cloud cover are June and July (Cloud cover 40).
The month with the least cloud cover is February (Cloud cover 31).
Average visibility in September
Harris, Montserrat
- 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).
