September weather forecastUmán, Mexico

September

Weather in September

September, the first month of the autumn in Umán, is also a hot month, with an average temperature fluctuating between 23.3°C (73.9°F) and 33.6°C (92.5°F).

Temperature

In September, Umán notes an average high-temperature of a tropical 33.6°C (92.5°F), hardly different from the preceding month. During September, Umán sees a mean low-temperature of 23.3°C (73.9°F).

Heat index

September's heat index is appraised at a blazing hot 49°C (120.2°F). Keep on guard: Heat exhaustion and heat cramps are probable. Heatstroke is a possible danger with ongoing physical activity.
It is essential to grasp that the heat index's numbers are for shade and light wind settings. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. 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.
Evaporating sweat, thanks to perspiration, acts as a natural air conditioner for the human body. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

The months with the highest humidity are September and October, with an average relative humidity of 78%.

Rainfall

In September, in Umán, the rain falls for 20.4 days. Throughout September, 70mm (2.76") of precipitation is accumulated. In Umán, during the entire year, the rain falls for 167.3 days and collects up to 536mm (21.1") of precipitation.

Daylight

In September, the average length of the day in Umán, Mexico, is 12h and 15min.
On the first day of the month, sunrise is at 5:42 am and sunset at 6:14 pm. On the last day of September, in Umán, sunrise is at 5:49 am and sunset at 5:47 pm CST.

Sunshine

The average sunshine in September is 9.4h.

UV index

The months with the highest UV index are February through October, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 7 translates into the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Always opt for UVA and UVB-resistant sunglasses on radiant days.

Updated: Feb 9, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

September temperatures in Umán, Mexico, vary between a high-temperature of 33.6°C (92.5°F) and a low-temperature of 23.3°C (73.9°F). The average heat index (a.k.a. 'feels like', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in September is appraised at 49°C (120.2°F).

September and October, with an average relative humidity of 78%, are most humid months.

In Umán, Mexico, the average relative humidity in September is 78%.

In Umán, in September, it is raining for 20.4 days, with typically 70mm (2.76") of accumulated precipitation.

The average day length in September in Umán is 12h and 15min.

In September, on the first day of the month, sunrise is at 5:42 am and sunset at 6:14 pm. On the last day of the month, in Umán, Mexico, sunrise is at 5:49 am and sunset at 5:47 pm CST.

In Umán, Mexico, the average sunshine duration in September is 9.4h.

February through October, with an average maximum UV index of 7, are months with the highest UV index in Umán, Mexico.

In Umán, the average daily maximum UV index in September is 7. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

35°C

33.6°C

31.5°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

12.6km/h

11.2km/h

12.4km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

12.2

8.8

8.5

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Umán, Mexico

Average high temperature in September: 33.6°C

The warmest month (with the highest average high temperature) is May (35.4°C).
The month with the lowest average high temperature is January (28.1°C).

Average low temperature in September: 23.3°C

The month with the highest average low temperature is June (24.3°C).
The coldest month (with the lowest average low temperature) is January (18.6°C).

Average pressure in September
Umán, Mexico

Average pressure in September: 1011.9mbar

The month with the highest atmospheric pressure is January (1017.6mbar).
The month with the lowest atmospheric pressure is September (1011.9mbar).

Average wind speed in September
Umán, Mexico

Average wind speed in September: 10.6km/h

The windiest month (with the highest average wind speed) is March (16.1km/h).
The calmest month (with the lowest average wind speed) is September (10.6km/h).

Average humidity in September
Umán, Mexico

Average humidity in September: 78%

The months with the highest relative humidity are September and October (78%).
The months with the lowest relative humidity are April and May (63%).

Average rainfall in September
Umán, Mexico

Average rainfall in September: 70mm

The wettest month (with the highest rainfall) is June (99mm).
The driest months (with the least rainfall) are February and March (12mm).

Average rainfall days in September
Umán, Mexico

Average rainfall days in September: 20.4 days

The month with the highest number of rainy days is September (20.4 days).
The months with the least rainy days are February and March (7.2 days).

Average daylight in September /
Average sunshine in September
Umán, Mexico

Average daylight in September: 12h and 18min

The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).

Average sunshine in September: 9h and 24min

The month with the most sunshine is May (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).

Average sunshine days in September
Umán, Mexico

Average sunshine days in September: 8.8 days

The month with the most sunshine days is March (21.8 days).
The month with the least sunshine days is October (8.5 days).

Average UV index in September
Umán, Mexico

Average UV index in September: 7

The months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 7).
The months with the lowest UV index are January, November and December (UV index 6).