September weather forecast and climate
Cardiff, AL

September, the first month of the autumn, in Cardiff, is still a warm month, with temperature in the range of an average high of 85.1°F (29.5°C) and an average low of 65.8°F (18.8°C).

Temperature

In September, the average high-temperature is relatively the same as in August - a warm 85.1°F (29.5°C). In Cardiff, the average low-temperature is 65.8°F (18.8°C).

Heat index

The average heat index is estimated at a tropical 93.4°F (34.1°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'apparent temperature', or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like activity, metabolic differences, clothing, and differences in body mass, height, and shape affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

Months with the lowest humidity are September and October, with an average relative humidity of 71%.

Rainfall

In Cardiff, it is raining for 14.5 days, with typically 2.48" (63mm) of accumulated precipitation. Throughout the year, in Cardiff, there are 173.7 rainfall days, and 40" (1016mm) of precipitation is accumulated.

Snowfall

In Cardiff snow does not fall in April through October.

Daylight

In September, the average length of the day is 12.4h.

Sunshine

In Cardiff, the average sunshine is 8.9h.

UV index

The average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Cardiff?

In Cardiff, in September, the average high-temperature is 85.1°F (29.5°C), and the average low-temperature is 65.8°F (18.8°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), that represents influence of the relative humidity to air temperaure, in September is appraised at 93.4°F (34.1°C).

What is the least humid month in Cardiff?

Months with the lowest humidity in Cardiff are September and October, with an average relative humidity of 71%.

What is the average humidity in September in Cardiff?

In September, the average relative humidity in Cardiff is 71%.

How much does it rain in Cardiff in September?

In Cardiff, Alabama, in September, it is raining for 14.5 days, with typically 2.48" (63mm) of accumulated precipitation.

When it does not snow in Cardiff?

In Cardiff snow does not fall in April through October.

How many hours of daylight does Cardiff have in September?

In Cardiff, the average length of the day in September is 12.4h.

How many hours of sunshine does Cardiff have in September?

In September, the average sunshine in Cardiff, Alabama, is 8.9h.

What is the UV index reading in September in Cardiff?

In Cardiff, Alabama, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in September - Cardiff, AL
  • Average high temperature in September: 85.1°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (50.9°F).

  • Average low temperature in September: 65.8°F

The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (35.2°F).

Average pressure in September - Cardiff, AL
  • Average pressure in September: 30.01"

The month with the highest atmospheric pressure is January (30.17").
Months with the lowest atmospheric pressure are June and August (29.98").

Average wind speed in September - Cardiff, AL
  • Average wind speed in September: 4.9mph

The windiest months (with the highest average wind speed) are February and March (7.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).

Average humidity in September - Cardiff, AL
  • Average humidity in September: 71%

The month with the highest relative humidity is December (79%).
Months with the lowest relative humidity are September and October (71%).

Average rainfall in September - Cardiff, AL
  • Average rainfall in September: 2.48"

The wettest month (with the highest rainfall) is December (4.17").
The driest month (with the least rainfall) is October (2.24").

Average rainfall days in September - Cardiff, AL
  • Average rainfall days in September: 14.5 days

The month with the highest number of rainy days is July (21.1 days).
The month with the least rainy days is November (9.6 days).

Average snowfall in September - Cardiff, AL
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.79").
Months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September - Cardiff, AL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (1.4 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in September / Average sunshine in September - Cardiff, AL
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in September: 8.9h

The month with the most sunshine is June (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.7h).

Average sunshine days in September - Cardiff, AL
  • Average sunshine days in September: 13 days

The month with the most sunshine days is October (19.8 days).
The month with the least sunshine days is July (7.5 days).

Average UV index in September - Cardiff, AL
  • Average UV index in September: 6

The month with the highest UV index is August (UV index 7).
The month with the lowest UV index is December (UV index 2).

Average cloud cover in September - Cardiff, AL
  • Average cloud cover in September: 30

The month with the most cloud cover is February (Cloud cover 49).
Months with the least cloud cover are June and September (Cloud cover 30).

Average visibility in September - Cardiff, AL
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).