September weather forecast
Cheltenham, Saint Vincent and the Grenadines

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Weather in September

September witnesses a slow decline in rainfall with approximately 81mm (3.19") of precipitation. The weather remains similar to August's with daytime temperatures peaking at around 28.8°C (83.8°F), the highest in the year. A decline to 20.6km/h (12.8mph) in wind speed also marks September as the least windy month of the entire year. Fortunately, the city receives about an average of 10 sunshine hours to grace the horizon daily.

Temperature

September is the month that records the highest temperatures, with averages ranging from a high of 28.8°C (83.8°F) to a low of 28°C (82.4°F).

Heat index

The heat index value during September is estimated at a hot 33°C (91.4°F). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
In the scope of the heat index, its values resonate with shade and light wind conditions. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'feels like' or 'felt air temperature', reflects the feeling of heat when considering both air temperature and humidity. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.

Humidity

In Cheltenham, the average relative humidity in September is 76%.

Rainfall

In Cheltenham, Saint Vincent and the Grenadines, in September, during 21.4 rainfall days, 81mm (3.19") of precipitation is typically accumulated. Throughout the year, there are 238.6 rainfall days, and 627mm (24.69") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 12min.
On the first day of the month, sunrise is at 05:53 and sunset at 18:15. On the last day of September, in Cheltenham, Saint Vincent and the Grenadines, sunrise is at 05:53 and sunset at 17:55 AST.

Sunshine

The average sunshine in September is 10h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: The UV index of 7 during September translates into the following guidance:
Ward off overexposure. Defence against solar harm is crucial. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.

Frequently asked questions

What month is the hottest?

September, marked by an average high-temperature of 28.8°C (83.8°F) and a low-temperature of 28°C (82.4°F), is the warmest month.

Is it hot during September?

In September, in Cheltenham, the average high-temperature is 28.8°C (83.8°F), and the average low-temperature is 28°C (82.4°F). In September, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines relative humidity and air temperature, is estimated at 33°C (91.4°F).

What is the average humidity in September in Cheltenham?

In Cheltenham, the average relative humidity in September is 76%.

How much does it rain in Cheltenham in September?

In Cheltenham, in September, during 21.4 rainfall days, 81mm (3.19") of precipitation is typically accumulated.

How many hours of daylight does Cheltenham have in September?

The average day length in September is 12h and 12min.

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 05:53 and sunset at 18:15. On the last day of the month, sunrise is at 05:53 and sunset at 17:55 AST.

How long on average sun shines in September?

The average sunshine duration in September is 10h.

When is the highest UV index?

The months with the highest UV index are January through December, with an average maximum UV index of 7.

What are the months with the lowest UV index?

The months with the lowest UV index in Cheltenham are January through December, with an average maximum UV index of 7.

How high is the UV index in September?

The average daily maximum UV index in September is 7. A UV Index reading of 6 to 7 represents a high health threat from exposure to Sun's UV rays.

Average temperature in September
Cheltenham, Saint Vincent and the Grenadines

Average temperature in September - Cheltenham, Saint Vincent and the Grenadines
  • 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 (26.5°C).

  • Average low temperature in September: 28°C

The month with the highest average low temperature is September (28°C).
The coldest month (with the lowest average low temperature) is February (25.7°C).

Average pressure in September
Cheltenham, Saint Vincent and the Grenadines

Average pressure in September - Cheltenham, Saint Vincent and the Grenadines
  • Average pressure in September: 1012.2mbar

The month with the highest atmospheric pressure is June (1014.5mbar).
The month with the lowest atmospheric pressure is November (1010.9mbar).

Average wind speed in September
Cheltenham, Saint Vincent and the Grenadines

Average wind speed in September - Cheltenham, Saint Vincent and the Grenadines
  • Average wind speed in September: 20.6km/h

The windiest month (with the highest average wind speed) is February (29.3km/h).
The calmest month (with the lowest average wind speed) is September (20.6km/h).

Average humidity in September
Cheltenham, Saint Vincent and the Grenadines

Average humidity in September - Cheltenham, Saint Vincent and the Grenadines
  • Average humidity in September: 76%

The months with the highest relative humidity are May, June and July (78%).
The month with the lowest relative humidity is February (75%).

Average rainfall in September
Cheltenham, Saint Vincent and the Grenadines

Average rainfall in September - Cheltenham, Saint Vincent and the Grenadines
  • Average rainfall in September: 81mm

The wettest month (with the highest rainfall) is August (94mm).
The driest month (with the least rainfall) is February (23mm).

Average rainfall days in September
Cheltenham, Saint Vincent and the Grenadines

Average rainfall days in September - Cheltenham, Saint Vincent and the Grenadines
  • Average rainfall days in September: 21.4 days

The month with the highest number of rainy days is August (24.3 days).
The month with the least rainy days is February (14.8 days).

Average daylight in September /
Average sunshine in September
Cheltenham, Saint Vincent and the Grenadines

Average daylight in September / Average sunshine in September - Cheltenham, Saint Vincent and the Grenadines
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 24min).

  • Average sunshine in September: 10h and 0min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).

Average sunshine days in September
Cheltenham, Saint Vincent and the Grenadines

Average sunshine days in September - Cheltenham, Saint Vincent and the Grenadines
  • Average sunshine days in September: 5.4 days

The months with the most sunshine days are February and March (9.3 days).
The month with the least sunshine days is July (1.7 days).

Average UV index in September
Cheltenham, Saint Vincent and the Grenadines

Average UV index in September - Cheltenham, Saint Vincent and the Grenadines
  • 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
Cheltenham, Saint Vincent and the Grenadines

Average cloud cover in September - Cheltenham, Saint Vincent and the Grenadines
  • Average cloud cover in September: 38

The month with the most cloud cover is July (Cloud cover 46).
The months with the least cloud cover are January and February (Cloud cover 37).

Average visibility in September
Cheltenham, Saint Vincent and the Grenadines

Average visibility in September - Cheltenham, Saint Vincent and the Grenadines
  • 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).

Cheltenham, Saint Vincent and the Grenadines

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