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
In Sixaola, the average temperatures in September are the highest, with a peak at 30°C (86°F) and a low of 24.9°C (76.8°F).Heat index
The heat index value during September is computed to be a very hot 35°C (95°F). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.Heat index evaluations are typically in the context of light winds and shaded environments. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.
Humidity
The least humid month is September, with an average relative humidity of 69%.Rainfall
In September, the rain falls for 18.1 days. Throughout September, 54mm (2.13") of precipitation is accumulated. In Sixaola, during the entire year, the rain falls for 197.8 days and collects up to 826mm (32.52") of precipitation.Daylight
The average length of the day in September is 12h and 10min.On the first day of September, sunrise is at 05:21 and sunset at 17:39. On the last day of the month, sunrise is at 05:18 and sunset at 17:21 CST.
Sunshine
The month with the most sunshine is September, with an average of 9.3h of sunshine.UV index
The months with the highest UV index are March through November, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The daily maximum UV index of 7 in September interprets into the following advice:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the hottest?
How hot is September?
What is the least humid month?
What is the average humidity in September?
How many days does it rain in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
What month has the most sunshine?
How many hours of sunshine does Sixaola have in September?
When is the highest UV index?
What is the UV index intensity in September?
Average temperature in September
Sixaola, Costa Rica
- Average high temperature in September: 30°C
The warmest month (with the highest average high temperature) is September (30°C).
The month with the lowest average high temperature is January (27.2°C).
- Average low temperature in September: 24.9°C
The month with the highest average low temperature is September (24.9°C).
The coldest month (with the lowest average low temperature) is February (22°C).
Average pressure in September
Sixaola, Costa Rica
- Average pressure in September: 1011.1mbar
The month with the highest atmospheric pressure is January (1012.7mbar).
The month with the lowest atmospheric pressure is October (1010.8mbar).
Average wind speed in September
Sixaola, Costa Rica
- Average wind speed in September: 6.2km/h
The windiest month (with the highest average wind speed) is December (9.8km/h).
The calmest months (with the lowest average wind speed) are September and October (6.2km/h).
Average humidity in September
Sixaola, Costa Rica
- Average humidity in September: 69%
The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is September (69%).
Average rainfall in September
Sixaola, Costa Rica
- Average rainfall in September: 54mm
The wettest month (with the highest rainfall) is July (120mm).
The driest month (with the least rainfall) is March (28mm).
Average rainfall days in September
Sixaola, Costa Rica
- Average rainfall days in September: 18.1 days
The month with the highest number of rainy days is July (22.3 days).
The month with the least rainy days is January (10.6 days).
Average daylight in September /
Average sunshine in September
Sixaola, Costa Rica
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 12h and 42min).
The month with the shortest days is December (Average daylight: 11h and 36min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is September (Average sunshine: 9h and 18min).
The months with the least sunshine are July and December (Average sunshine: 8h and 18min).
Average sunshine days in September
Sixaola, Costa Rica
- Average sunshine days in September: 8.4 days
The month with the most sunshine days is January (17.7 days).
The month with the least sunshine days is July (5.5 days).
Average UV index in September
Sixaola, Costa Rica
- Average UV index in September: 7
The months with the highest UV index are March, April, May, June, July, August, September, October and November (UV index 7).
The months with the lowest UV index are January, February and December (UV index 6).
Average cloud cover in September
Sixaola, Costa Rica
- Average cloud cover in September: 27
The month with the most cloud cover is July (Cloud cover 39).
The month with the least cloud cover is September (Cloud cover 27).
Average visibility in September
Sixaola, Costa Rica
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
