Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The commencement of September brings an average high-temperature of a still hot 30.3°C (86.5°F), marking an inconsequential divergence from August. San Isidro cools down to an average low-temperature of 23.3°C (73.9°F) throughout the month of September.Heat index
September's heat index is evaluated at a sweltering 39°C (102.2°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.Take into consideration that the heat index values are calculated for shade and light wind conditions. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for 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.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.
Humidity
In September, the average relative humidity is 80%.Rainfall
In September, the rain falls for 16.8 days. Throughout September, 52mm (2.05") of precipitation is accumulated. Throughout the year, in San Isidro, there are 169.6 rainfall days, and 448mm (17.64") of precipitation is accumulated.Daylight
In San Isidro, the average length of the day in September is 12h and 14min.On the first day of September, sunrise is at 06:24 and sunset at 18:53. On the last day of the month, sunrise is at 06:29 and sunset at 18:28 AST.
Sunshine
The months with the most sunshine in San Isidro are January, September and November, with an average of 9.3h of sunshine.UV index
May through July, September and October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The average daily UV index of 7 in September transforms into the following instructions:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Frequently asked questions
How hot is it in San Isidro in September?
What is the average humidity in September in San Isidro?
How much does it rain in San Isidro in September?
What is the average length of the day in September in San Isidro?
What time are sunrise and sunset in September in San Isidro?
What is the month with the most sunshine in San Isidro?
How many hours of sunshine does San Isidro have in September?
What is the month with the highest UV index in San Isidro?
How high is the UV index in September in San Isidro?
Average temperature in September
San Isidro, Dominican Republic
- Average high temperature in September: 30.3°C
The warmest month (with the highest average high temperature) is August (30.5°C).
The month with the lowest average high temperature is January (27.6°C).
- Average low temperature in September: 23.3°C
The month with the highest average low temperature is August (23.7°C).
The coldest month (with the lowest average low temperature) is February (20.2°C).
Average pressure in September
San Isidro, Dominican Republic
- Average pressure in September: 1013.4mbar
The month with the highest atmospheric pressure is January (1016.7mbar).
The month with the lowest atmospheric pressure is October (1012.6mbar).
Average wind speed in September
San Isidro, Dominican Republic
- Average wind speed in September: 8.8km/h
The windiest month (with the highest average wind speed) is February (11.2km/h).
The calmest month (with the lowest average wind speed) is October (8.5km/h).
Average humidity in September
San Isidro, Dominican Republic
- Average humidity in September: 80%
The months with the highest relative humidity are October, November and December (81%).
The month with the lowest relative humidity is March (77%).
Average rainfall in September
San Isidro, Dominican Republic
- Average rainfall in September: 52mm
The wettest month (with the highest rainfall) is August (86mm).
The driest month (with the least rainfall) is January (9mm).
Average rainfall days in September
San Isidro, Dominican Republic
- Average rainfall days in September: 16.8 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is January (7.3 days).
Average daylight in September /
Average sunshine in September
San Isidro, Dominican Republic
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 0min).
- Average sunshine in September: 9h and 2min
The months with the most sunshine are January, September and November (Average sunshine: 9h and 18min).
The month with the least sunshine is May (Average sunshine: 8h and 42min).
Average sunshine days in September
San Isidro, Dominican Republic
- Average sunshine days in September: 11.2 days
The month with the most sunshine days is January (22.7 days).
The month with the least sunshine days is July (10.1 days).
Average UV index in September
San Isidro, Dominican Republic
- Average UV index in September: 7
The months with the highest UV index are May, June, July, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, August, November and December (UV index 6).
Average cloud cover in September
San Isidro, Dominican Republic
- Average cloud cover in September: 26
The month with the most cloud cover is May (Cloud cover 35).
The months with the least cloud cover are January, September and October (Cloud cover 26).
Average visibility in September
San Isidro, Dominican Republic
- Average visibility in September: 9km
The months with the highest visibility are February, March, November and December (10km).
The months with the lowest visibility are January, April, May, June, July, August, September and October (9km).
San Isidro, Dominican Republic
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