September weather forecastRio Bravo, Guatemala
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Rio Bravo, Guatemala, with an average temperature varying between 19.4°C (66.9°F) and 28.5°C (83.3°F).Temperature
Rio Bravo witnesses the coldest weather in September, with temperatures averaging a high of 28.5°C (83.3°F) and a low of 19.4°C (66.9°F).Heat index
The heat index for September is estimated at a tropical 33°C (91.4°F). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.Heat index values are typically calculated for conditions of shade and a light breeze. 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 'feels like', joins air temperature with relative humidity to produce a temperature perception for humans. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Humidity
September and October, with an average relative humidity of 79%, are the most humid months.Rainfall
In Rio Bravo, during September, the rain falls for 27.5 days and regularly aggregates up to 209mm (8.23") of precipitation. In Rio Bravo, during the entire year, the rain falls for 222.8 days and collects up to 1491mm (58.7") of precipitation.Daylight
In September, the average length of the day in Rio Bravo is 12h and 13min.On the first day of the month, sunrise is at 05:53 and sunset at 18:16. On the last day of September, in Rio Bravo, sunrise is at 05:54 and sunset at 17:55 CST.
Sunshine
The average sunshine in September is 10.4h.UV index
The months with the highest UV index in Rio Bravo are January through December, with an average maximum UV index of 6. The months with the lowest UV index in Rio Bravo are January through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index, 6 during September, leads to the following recommendations:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rio Bravo, Guatemala
- Average high temperature in September: 28.5°C
The warmest month (with the highest average high temperature) is March (31.5°C).
The month with the lowest average high temperature is September (28.5°C).
- Average low temperature in September: 19.4°C
The month with the highest average low temperature is May (20.5°C).
The coldest month (with the lowest average low temperature) is December (17.6°C).
Average pressure in September
Rio Bravo, Guatemala
- Average pressure in September: 1012.4mbar
The month with the highest atmospheric pressure is January (1014.5mbar).
The month with the lowest atmospheric pressure is October (1012.2mbar).
Average wind speed in September
Rio Bravo, Guatemala
- Average wind speed in September: 5.2km/h
The windiest month (with the highest average wind speed) is March (6.6km/h).
The calmest month (with the lowest average wind speed) is May (5.1km/h).
Average humidity in September
Rio Bravo, Guatemala
- Average humidity in September: 79%
The months with the highest relative humidity are September and October (79%).
The months with the lowest relative humidity are January, February and March (59%).
Average rainfall in September
Rio Bravo, Guatemala
- Average rainfall in September: 209mm
The wettest month (with the highest rainfall) is May (274mm).
The driest months (with the least rainfall) are January and February (7mm).
Average rainfall days in September
Rio Bravo, Guatemala
- Average rainfall days in September: 27.5 days
The month with the highest number of rainy days is September (27.5 days).
The month with the least rainy days is January (4.8 days).
Average daylight in September /
Average sunshine in September
Rio Bravo, Guatemala
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 13h and 0min).
The month with the shortest days is December (Average daylight: 11h and 18min).
- Average sunshine in September: 10h and 24min
The months with the most sunshine are April and July (Average sunshine: 11h and 12min).
The month with the least sunshine is November (Average sunshine: 7h and 24min).
Average sunshine days in September
Rio Bravo, Guatemala
- Average sunshine days in September: 1.5 days
The month with the most sunshine days is January (24.4 days).
The month with the least sunshine days is September (1.5 days).
Average UV index in September
Rio Bravo, Guatemala
- Average UV index in September: 6
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).
Average cloud cover in September
Rio Bravo, Guatemala
- Average cloud cover in September: 36
The month with the most cloud cover is June (Cloud cover 38).
The month with the least cloud cover is January (Cloud cover 12).
Average visibility in September
Rio Bravo, Guatemala
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April and December (10km).
The months with the lowest visibility are May, June, July, August, September, October and November (9km).
