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
September
Weather in September
Temperature
The advent of September presents an average high-temperature of a moderately hot 29.8°C (85.6°F), maintaining a close correlation with the preceding month. Terre-Neuve's average low-temperature is measured at a still warm 23.1°C (73.6°F) during September.Heat index
Throughout September, the heat index is calculated to be a sweltering 37°C (98.6°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.Records show heat index calculations are tailored for shaded regions and mild winds. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'feels like' or 'real feel', is a value derived by merging air temperature with the humidity to convey how the climate feels. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.
Humidity
In September, the average relative humidity is 79%.Rainfall
In September, the rain falls for 23.6 days. Throughout September, 101mm (3.98") of precipitation is accumulated. Throughout the year, there are 219.6 rainfall days, and 736mm (28.98") of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 15min.On the first day of September, sunrise is at 06:35 and sunset at 19:05. On the last day of the month, sunrise is at 06:41 and sunset at 18:39 EDT.
Sunshine
In Terre-Neuve, the average sunshine in September is 10.1h.UV index
The months with the highest UV index are April through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 7 in September translates into this advice:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September?
How many days does it rain in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the month with the highest UV index?
What is the UV index intensity in September?
Average temperature in September
Terre-Neuve, Haiti
- Average high temperature in September: 29.8°C
The warmest month (with the highest average high temperature) is July (30.7°C).
The month with the lowest average high temperature is January (27.3°C).
- Average low temperature in September: 23.1°C
The month with the highest average low temperature is July (23.5°C).
The coldest month (with the lowest average low temperature) is January (20.1°C).
Average pressure in September
Terre-Neuve, Haiti
- Average pressure in September: 1013.2mbar
The month with the highest atmospheric pressure is January (1016.6mbar).
The month with the lowest atmospheric pressure is October (1012.5mbar).
Average wind speed in September
Terre-Neuve, Haiti
- Average wind speed in September: 7km/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 September (7km/h).
Average humidity in September
Terre-Neuve, Haiti
- Average humidity in September: 79%
The month with the highest relative humidity is November (81%).
The months with the lowest relative humidity are March and April (74%).
Average rainfall in September
Terre-Neuve, Haiti
- Average rainfall in September: 101mm
The wettest month (with the highest rainfall) is May (118mm).
The driest months (with the least rainfall) are January and December (13mm).
Average rainfall days in September
Terre-Neuve, Haiti
- Average rainfall days in September: 23.6 days
The month with the highest number of rainy days is May (25.3 days).
The month with the least rainy days is December (8.5 days).
Average daylight in September /
Average sunshine in September
Terre-Neuve, Haiti
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 13h and 18min).
The month with the shortest days is December (Average daylight: 11h and 0min).
- Average sunshine in September: 10h and 1min
The months with the most sunshine are July and August (Average sunshine: 11h and 18min).
The months with the least sunshine are January and February (Average sunshine: 7h and 12min).
Average sunshine days in September
Terre-Neuve, Haiti
- Average sunshine days in September: 3.2 days
The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is September (3.2 days).
Average UV index in September
Terre-Neuve, Haiti
- Average UV index in September: 7
The months with the highest UV index are April, May, June, July, August and September (UV index 7).
The months with the lowest UV index are January, February, March, October, November and December (UV index 6).
Average cloud cover in September
Terre-Neuve, Haiti
- Average cloud cover in September: 24
The month with the most cloud cover is May (Cloud cover 32).
The month with the least cloud cover is December (Cloud cover 18).
Average visibility in September
Terre-Neuve, Haiti
- 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).
