September weather forecastAltamira, Mexico
September
Weather in September
The first month of the autumn, September, is still a hot month in Altamira, Mexico, with an average temperature fluctuating between 30.7°C (87.3°F) and 24.8°C (76.6°F).Temperature
Altamira's shift into September is marked by a subtle change to a still hot 30.7°C (87.3°F) from August's 31.8°C (89.2°F) in temperature. Altamira witnesses an average low-temperature of 24.8°C (76.6°F) throughout the month of September.Heat index
Throughout September, the heat index is evaluated at a fiery hot 39°C (102.2°F). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.Research indicates the heat index considers values in shaded locales and with light winds. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'real feel', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.
Humidity
In September, the average relative humidity in Altamira is 76%.Rainfall
The month with the most rainfall in Altamira is September, when the rain falls for 23.3 days and typically aggregates up to 130mm (5.12") of precipitation.Daylight
In September, the average length of the day is 12h and 16min.On the first day of the month, sunrise is at 6:14 am and sunset at 6:48 pm. On the last day of September, in Altamira, sunrise is at 6:23 am and sunset at 6:19 pm CST.
Sunshine
In Altamira, Mexico, the average sunshine in September is 8.8h.UV index
The months with the highest UV index are April through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the ordinary person.Note: A maximum high daily UV index of 7 during September translates into the following directions:
Shield from overexposure. Defense against sun-related harm is required. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Altamira, Mexico
- Average high temperature in September: 30.7°C
The warmest month (with the highest average high temperature) is August (31.8°C).
The month with the lowest average high temperature is January (22.8°C).
- Average low temperature in September: 24.8°C
The month with the highest average low temperature is June (25.9°C).
The coldest month (with the lowest average low temperature) is January (16.8°C).
Average pressure in September
Altamira, Mexico
- Average pressure in September: 1012.5mbar
The month with the highest atmospheric pressure is January (1019.2mbar).
The months with the lowest atmospheric pressure are May and June (1011.7mbar).
Average wind speed in September
Altamira, Mexico
- Average wind speed in September: 12.5km/h
The windiest months (with the highest average wind speed) are April and May (15.6km/h).
The calmest month (with the lowest average wind speed) is September (12.5km/h).
Average humidity in September
Altamira, Mexico
- Average humidity in September: 76%
The month with the highest relative humidity is February (77%).
The months with the lowest relative humidity are January and November (74%).
Average rainfall in September
Altamira, Mexico
- Average rainfall in September: 130mm
The wettest month (with the highest rainfall) is September (130mm).
The driest month (with the least rainfall) is April (7mm).
Average rainfall days in September
Altamira, Mexico
- Average rainfall days in September: 23.3 days
The month with the highest number of rainy days is September (23.3 days).
The month with the least rainy days is April (5.7 days).
Average daylight in September /
Average sunshine in September
Altamira, Mexico
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 13h and 30min).
The month with the shortest days is December (Average daylight: 10h and 48min).
- Average sunshine in September: 8h and 48min
The month with the most sunshine is June (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in September
Altamira, Mexico
- Average sunshine days in September: 5.8 days
The month with the most sunshine days is April (23.5 days).
The month with the least sunshine days is September (5.8 days).
Average UV index in September
Altamira, Mexico
- Average UV index in September: 7
The months with the highest UV index are April, May, June, July, August and September (UV index 7).
The months with the lowest UV index are January, February and December (UV index 5).
Average cloud cover in September
Altamira, Mexico
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in September
Altamira, Mexico
- Average visibility in September: 10km
The months with the highest visibility are January, February, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is March (9km).
