September weather forecast
Joanna, Guyana

The first month of the autumn, September, is also a hot month in Joanna, Guyana, with temperature in the range of an average high of 30.8°C (87.4°F) and an average low of 25.9°C (78.6°F).

Temperature

September, recording an average high temperature of 30.8°C (87.4°F) and a low temperature of 25.9°C (78.6°F), is Joanna's warmest month.

Heat index

In September, the average heat index is estimated at a fiery hot 39°C (102.2°F). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.
Data suggests that the heat index is set for environments in shade and with a light wind. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'feels like', unifies temperature and humidity readings to offer a comprehensive feel of warmth. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. When body heat isn't effectively managed, risks of dehydration and overheating amplify.

Humidity

September is the least humid month in Joanna, with an average relative humidity of 76%.

Rainfall

In September, the rain falls for 24.5 days. Throughout September, 141mm (5.55") of precipitation is accumulated. In Joanna, Guyana, during the entire year, the rain falls for 312.6 days and collects up to 2298mm (90.47") of precipitation.

Daylight

In September, the average length of the day in Joanna is 12h and 9min.
On the first day of September, sunrise is at 05:42 and sunset at 17:55. On the last day of the month, sunrise is at 05:36 and sunset at 17:40 -04.

Sunshine

September has the most sunshine of the year in Joanna, with an average of 9.3h of sunshine.

UV index

The months with the highest UV index are January, February, April, June through December, 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 the ordinary person.
Note: The maximum daily UV index of 7 in September converts into the following recommendations:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.