September weather forecastJoanna, Guyana
September
Weather in September
The first month of the autumn, September, is also a hot month in Joanna, Guyana, with temperature in the range of an average low of 25.9°C (78.6°F) and an average high of 30.8°C (87.4°F).Temperature
Joanna's September weather reaches an average high of 30.8°C (87.4°F) and an average low of 25.9°C (78.6°F), making it the warmest month.Heat index
September's average heat index is computed to be a torrid 39°C (102.2°F). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.Data suggests that the heat index is set for environments in shade and with a light wind. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', embodies the combination of air temperature and moisture content to illustrate perceived heat. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. 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.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Overheating and potential dehydration arise when body heat gain eclipses its release capability.
Humidity
September is the least humid month, 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. Throughout the year, there are 312.6 rainfall days, and 2298mm (90.47") of precipitation is accumulated.Daylight
The average length of the day in September 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
With an average of 9.3h of sunshine, September has the most sunshine of the year.UV index
January, February, April, June through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the average person.Note: A maximum high daily UV index of 7 during September translates into the following directions:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Joanna, Guyana
- Average high temperature in September: 30.8°C
The warmest month (with the highest average high temperature) is September (30.8°C).
The months with the lowest average high temperature are January and February (28°C).
- Average low temperature in September: 25.9°C
The months with the highest average low temperature are September and October (25.9°C).
The coldest months (with the lowest average low temperature) are January, February and July (24.8°C).
Average pressure in September
Joanna, Guyana
- Average pressure in September: 1011.4mbar
The month with the highest atmospheric pressure is June (1012.9mbar).
The month with the lowest atmospheric pressure is November (1009.4mbar).
Average wind speed in September
Joanna, Guyana
- Average wind speed in September: 13.6km/h
The windiest month (with the highest average wind speed) is March (16.7km/h).
The calmest month (with the lowest average wind speed) is July (11.3km/h).
Average humidity in September
Joanna, Guyana
- Average humidity in September: 76%
The month with the highest relative humidity is June (82%).
The month with the lowest relative humidity is September (76%).
Average rainfall in September
Joanna, Guyana
- Average rainfall in September: 141mm
The wettest month (with the highest rainfall) is June (314mm).
The driest month (with the least rainfall) is March (97mm).
Average rainfall days in September
Joanna, Guyana
- Average rainfall days in September: 24.5 days
The month with the highest number of rainy days is July (29.9 days).
The month with the least rainy days is October (23.5 days).
Average daylight in September /
Average sunshine in September
Joanna, 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 48min).
- Average sunshine in September: 9h and 18min
The month with the most sunshine is September (Average sunshine: 9h and 18min).
The month with the least sunshine is April (Average sunshine: 7h and 0min).
Average sunshine days in September
Joanna, Guyana
- Average sunshine days in September: 3.4 days
The month with the most sunshine days is October (5 days).
The month with the least sunshine days is July (0.3 days).
Average UV index in September
Joanna, Guyana
- Average UV index in September: 7
The months with the highest UV index are January, February, April, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are March and May (UV index 6).
Average cloud cover in September
Joanna, Guyana
- Average cloud cover in September: 24
The months with the most cloud cover are February and April (Cloud cover 49).
The month with the least cloud cover is September (Cloud cover 24).
Average visibility in September
Joanna, Guyana
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, September, October and December (10km).
The months with the lowest visibility are May, June, July, August and November (9km).
