September weather forecastCaledonia, Guyana

September

Weather in September

The first month of the autumn, September, is still a tropical month in Caledonia, Guyana, with an average temperature varying between 22.9°C (73.2°F) and 33.1°C (91.6°F).

Temperature

The warmest temperatures occur during September, when averages reach a peak of 33.1°C (91.6°F) and a low of 22.9°C (73.2°F).

Heat index

September's mean heat index is computed to be a burning hot 48°C (118.4°F). Stay vigilant: Heat cramps along with heat exhaustion are expected. Heatstroke may follow prolonged exertion.
Consider that heat index readings are for situations in the shade and light wind. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is an estimation of the warmth sensation when considering humidity levels. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

The months with the lowest humidity in Caledonia are September and October, with an average relative humidity of 78%.

Rainfall

September is the month with the least rainfall in Caledonia. Rain falls for 21 days and accumulates 55mm (2.17") of precipitation.

Daylight

The average length of the day in September in Caledonia is 12h and 10min.
On the first day of September in Caledonia, sunrise is at 05:46 and sunset at 18:00. On the last day of the month, sunrise is at 05:41 and sunset at 17:45 -04.

Sunshine

The average sunshine in September in Caledonia is 9h.

UV index

March, April, July through November, with an average maximum UV index of 7, are months with the highest UV index in Caledonia. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the average person.
Note: The average daily UV index of 7 in September transforms into the following instructions:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.

Updated: Feb 19, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

With an average high-temperature of 33.1°C (91.6°F) and an average low-temperature of 22.9°C (73.2°F), September is the warmest month.

The high-temperature in Caledonia during September is 33.1°C (91.6°F) and the low-temperature is 22.9°C (73.2°F). In September, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is computed to be 48°C (118.4°F).

September and October, with an average relative humidity of 78%, are the least humid months in Caledonia, Guyana.

In Caledonia, Guyana, the average relative humidity in September is 78%.

The month with the least rainfall in Caledonia, Guyana, is September, when the rain falls for 21 days and typically collects 55mm (2.17") of precipitation.

In Caledonia, Guyana, in September, it is raining for 21 days, with typically 55mm (2.17") of accumulated precipitation.

The average day length in September is 12h and 10min.

On the first day of September in Caledonia, sunrise is at 05:46 and sunset at 18:00. On the last day of the month, sunrise is at 05:41 and sunset at 17:45 -04.

In September, the average sunshine duration in Caledonia, Guyana, is 9h.

The months with the highest UV index are March, April, July through November, with an average maximum UV index of 7.

In September, the average daily maximum UV index in Caledonia, Guyana, is 7. A UV Index of 6 to 7 symbolizes a high hazard to health from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

32.2°C

33.1°C

32.9°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

5.8km/h

6.2km/h

6.7km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

8.5

6.2

5.2

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Caledonia, Guyana

Average high temperature in September: 33.1°C

The warmest month (with the highest average high temperature) is September (33.1°C).
The month with the lowest average high temperature is January (29.3°C).

Average low temperature in September: 22.9°C

The month with the highest average low temperature is October (23.5°C).
The coldest month (with the lowest average low temperature) is January (21.8°C).

Average pressure in September
Caledonia, Guyana

Average pressure in September: 1011.6mbar

The month with the highest atmospheric pressure is June (1013.3mbar).
The month with the lowest atmospheric pressure is November (1009.8mbar).

Average wind speed in September
Caledonia, Guyana

Average wind speed in September: 5.8km/h

The windiest month (with the highest average wind speed) is March (7.3km/h).
The calmest months (with the lowest average wind speed) are July and August (5.1km/h).

Average humidity in September
Caledonia, Guyana

Average humidity in September: 78%

The month with the highest relative humidity is June (85%).
The months with the lowest relative humidity are September and October (78%).

Average rainfall in September
Caledonia, Guyana

Average rainfall in September: 55mm

The wettest month (with the highest rainfall) is June (167mm).
The driest month (with the least rainfall) is September (55mm).

Average rainfall days in September
Caledonia, Guyana

Average rainfall days in September: 21 days

The month with the highest number of rainy days is December (29.1 days).
The month with the least rainy days is August (20.8 days).

Average daylight in September /
Average sunshine in September
Caledonia, Guyana

Average daylight in September: 12h and 12min

The month with the longest days is June (Average daylight: 12h and 30min).
The month with the shortest days is December (Average daylight: 11h and 42min).

Average sunshine in September: 9h and 0min

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 6h and 0min).

Average sunshine days in September
Caledonia, Guyana

Average sunshine days in September: 6.2 days

The month with the most sunshine days is August (8.5 days).
The month with the least sunshine days is December (0.3 days).

Average UV index in September
Caledonia, Guyana

Average UV index in September: 7

The months with the highest UV index are March, April, July, August, September, October and November (UV index 7).
The months with the lowest UV index are January, February, May, June and December (UV index 6).