September weather forecast and climate
Catherine, AL

September, the first month of the autumn, in Catherine, is still a tropical month, with average temperature varying between 88.3°F (31.3°C) and 67.5°F (19.7°C).

Temperature

In September, the average high-temperature is almost the same as in August - a still hot 88.3°F (31.3°C). In Catherine, in September, the average low-temperature is 67.5°F (19.7°C).

Heat index

The average heat index is evaluated at a sweltering 102.9°F (39.4°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. With the 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 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (wind, pregnancy, metabolic differences). 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. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in Catherine, Alabama, is 73%.

Rainfall

In Catherine, it is raining for 15.7 days, with typically 2.44" (62mm) of accumulated precipitation. Throughout the year, in Catherine, there are 171.5 rainfall days, and 35.47" (901mm) of precipitation is accumulated.

Snowfall

April through November are months without snowfall in Catherine.

Daylight

The average length of the day in September is 12.3h.

Sunshine

In September, the average sunshine in Catherine is 8.8h.

UV index

The average daily maximum UV index in Catherine is 6. A UV Index value of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays for the average person.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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 Catherine?

In September, in Catherine, the average high-temperature is 88.3°F (31.3°C), and the average low-temperature is 67.5°F (19.7°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), that calculates temperature value influenced by the moisture in the air, in September is appraised at 102.9°F (39.4°C).

What is the average humidity in September in Catherine?

In Catherine, Alabama, the average relative humidity in September is 73%.

How much does it rain in Catherine in September?

In Catherine, during September, the rain falls for 15.7 days and regularly aggregates up to 2.44" (62mm) of precipitation.

When it does not snow in Catherine?

April through November are months without snowfall in Catherine, Alabama.

How many hours of daylight does Catherine have in September?

In Catherine, the average length of the day in September is 12.3h.

How long on average sun shines in September in Catherine?

In September, the average sunshine in Catherine, Alabama, is 8.8h.

How high is the UV index in September in Catherine?

In Catherine, Alabama, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health threat from unsafe exposure to the Sun's UV rays.
Average temperature in September - Catherine, AL
  • Average high temperature in September: 88.3°F

The warmest month (with the highest average high temperature) is July (93.2°F).
The month with the lowest average high temperature is January (55.9°F).

  • Average low temperature in September: 67.5°F

Months with the highest average low temperature are July and August (72.1°F).
The coldest month (with the lowest average low temperature) is January (38.8°F).

Average pressure in September - Catherine, AL
  • Average pressure in September: 29.99"

The month with the highest atmospheric pressure is January (30.16").
Months with the lowest atmospheric pressure are June and August (29.97").

Average wind speed in September - Catherine, AL
  • Average wind speed in September: 4.8mph

The windiest month (with the highest average wind speed) is February (6.7mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).

Average humidity in September - Catherine, AL
  • Average humidity in September: 73%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (70%).

Average rainfall in September - Catherine, AL
  • Average rainfall in September: 2.44"

The wettest month (with the highest rainfall) is December (3.94").
The driest month (with the least rainfall) is November (1.93").

Average rainfall days in September - Catherine, AL
  • Average rainfall days in September: 15.7 days

The month with the highest number of rainy days is July (22.5 days).
The month with the least rainy days is November (8.3 days).

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

The month with the highest snowfall is March (0.31").
Months with the least snowfall are April, May, June, July, August, September, October and November (0").

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

The month with the highest number of snowfall days is January (0.6 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 - Catherine, AL
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 14.2h).
The month with the shortest days is December (Average daylight: 10.1h).

  • Average sunshine in September: 8.8h

The month with the most sunshine is June (Average sunshine: 10.4h).
The month with the least sunshine is February (Average sunshine: 4.9h).

Average sunshine days in September - Catherine, AL
  • Average sunshine days in September: 12.7 days

Months with the most sunshine days are October and November (20.5 days).
The month with the least sunshine days is July (6.6 days).

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

Months with the highest UV index are June, July and August (UV index 7).
Months with the lowest UV index are January and December (UV index 3).

Average cloud cover in September - Catherine, AL
  • Average cloud cover in September: 32

The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is October (Cloud cover 31).

Average visibility in September - Catherine, AL
  • Average visibility in September: 5mi

Months with the highest visibility are January, February, March, April, June, October and November (6mi).
Months with the lowest visibility are May, July, August, September and December (5mi).