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
Weather in September
Temperature
The arrival of September marks a slight shift to an average high-temperature of a still moderately hot 84.9°F (29.4°C) from August's 85.5°F (29.7°C). Nights in Old Man Bay during September maintain a steady temperature, averaging at a still moderately hot 83.3°F (28.5°C).Heat index
September's heat index is evaluated at a hot 93.2°F (34°C). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.Data suggests that the heat index is set for environments in shade and with a light wind. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Humidity
With an average relative humidity of 74%, September is the least humid month.Rainfall
In September, in Old Man Bay, the rain falls for 19.9 days. Throughout September, 3.19" (81mm) of precipitation is accumulated. In Old Man Bay, during the entire year, the rain falls for 241.1 days and collects up to 33.62" (854mm) of precipitation.Daylight
In Old Man Bay, the average length of the day in September is 12h and 14min.On the first day of September in Old Man Bay, sunrise is at 06:09 and sunset at 18:39. On the last day of the month, sunrise is at 06:15 and sunset at 18:13 EST.
Sunshine
The average sunshine in September in Old Man Bay, Cayman Islands, is 9h.UV index
The months with the highest UV index are February through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 7 in September converts into the following recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in Old Man Bay in September?
What is the least humid month in Old Man Bay?
What is the average humidity in September in Old Man Bay?
How many days does it rain in September in Old Man Bay?
How many hours of daylight does Old Man Bay have in September?
When is the sunrise / sunset in September in Old Man Bay?
How long on average sun shines in September in Old Man Bay?
What is the month with the highest UV index in Old Man Bay?
What is the UV index intensity in September in Old Man Bay?
Average temperature in September
Old Man Bay, Cayman Islands
- Average high temperature in September: 84.9°F
The warmest month (with the highest average high temperature) is August (85.5°F).
The month with the lowest average high temperature is February (79.2°F).
- Average low temperature in September: 83.3°F
The month with the highest average low temperature is August (83.5°F).
The coldest month (with the lowest average low temperature) is March (76.8°F).
Average pressure in September
Old Man Bay, Cayman Islands
- Average pressure in September: 29.9"Hg
The month with the highest atmospheric pressure is January (30.01"Hg).
The month with the lowest atmospheric pressure is October (29.88"Hg).
Average wind speed in September
Old Man Bay, Cayman Islands
- Average wind speed in September: 10.7mph
The windiest month (with the highest average wind speed) is December (16.4mph).
The calmest month (with the lowest average wind speed) is September (10.7mph).
Average humidity in September
Old Man Bay, Cayman Islands
- Average humidity in September: 74%
The month with the highest relative humidity is June (79%).
The month with the lowest relative humidity is September (74%).
Average rainfall in September
Old Man Bay, Cayman Islands
- Average rainfall in September: 3.19"
The wettest month (with the highest rainfall) is October (6.26").
The driest month (with the least rainfall) is March (0.94").
Average rainfall days in September
Old Man Bay, Cayman Islands
- Average rainfall days in September: 19.9 days
The month with the highest number of rainy days is October (26.5 days).
The month with the least rainy days is March (16 days).
Average daylight in September /
Average sunshine in September
Old Man Bay, Cayman Islands
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 13h and 18min).
The month with the shortest days is December (Average daylight: 11h and 0min).
- Average sunshine in September: 9h and 0min
The months with the most sunshine are May and July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in September
Old Man Bay, Cayman Islands
- Average sunshine days in September: 7.4 days
The month with the most sunshine days is March (9.3 days).
The month with the least sunshine days is November (2.5 days).
Average UV index in September
Old Man Bay, Cayman Islands
- Average UV index in September: 7
The months with the highest UV index are February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The month with the lowest UV index is January (UV index 6).
Average cloud cover in September
Old Man Bay, Cayman Islands
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 41).
The month with the least cloud cover is April (Cloud cover 28).
Average visibility in September
Old Man Bay, Cayman Islands
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Old Man Bay, Cayman Islands
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