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 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
Throughout September, the heat index is evaluated at a life-threatening hot 48°C (118.4°F). Attention: Heat exhaustion and heat cramps are quite likely. Heatstroke becomes a risk with continued exertion.Consider that heat index readings are for situations in the shade and light wind. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', determines the feeling of heat when you account for the relative humidity. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.
Humidity
The months with the lowest humidity are September and October, with an average relative humidity of 78%.Rainfall
The month with the least rainfall is September, when the rain falls for 21 days and typically collects 55mm (2.17") of precipitation.Daylight
In Charlestown, the average length of the day in September is 12h and 10min.On the first day of September in Charlestown, sunrise is at 05:45 and sunset at 17:59. On the last day of the month, sunrise is at 05:40 and sunset at 17:44 -04.
Sunshine
The average sunshine in September is 9h.UV index
The months with the highest UV index in Charlestown are March, April, July through November, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, a daily UV index of 7 turns into the following recommendations:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the hottest time of year in Charlestown?
How hot is it in Charlestown in September?
What are the least humid months in Charlestown?
What is the average humidity in September in Charlestown?
What is the driest month in Charlestown?
How much does it rain in Charlestown in September?
How many hours of daylight does Charlestown have in September?
When are sunrise and sunset in September in Charlestown?
How long on average sun shines in September in Charlestown?
What is the month with the highest UV index in Charlestown?
How high is the UV index in September in Charlestown?
Average temperature in September
Charlestown, 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
Charlestown, 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
Charlestown, 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
Charlestown, 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
Charlestown, 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
Charlestown, 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
Charlestown, Guyana
- Average daylight in September: 12h and 1min
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
Charlestown, 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
Charlestown, 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).
Average cloud cover in September
Charlestown, Guyana
- Average cloud cover in September: 31
The month with the most cloud cover is May (Cloud cover 55).
The month with the least cloud cover is September (Cloud cover 31).
Average visibility in September
Charlestown, Guyana
- Average visibility in September: 8km
The months with the highest visibility are March and April (9km).
The months with the lowest visibility are June and July (7km).
