September weather forecast and climate
Opelika, AL

Weather in September

September, the first month of the autumn, in Opelika, is still a hot month, with temperature in the range of an average high of 86°F (30°C) and an average low of 66.7°F (19.3°C).

Temperature

In Opelika, the average high-temperature is relatively the same as in August - a still hot 86°F (30°C). The average low-temperature, in Opelika, is 66.7°F (19.3°C).

Heat index

In September, the average heat index is estimated at a sweltering 95.9°F (35.5°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. 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', 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 (clothing, wind, 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. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. 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 September is 72%.

Rainfall

The month with the least rainfall is September when the rain falls for 14.1 days and typically collects 2.01" (51mm) of precipitation.

Snowfall

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

Daylight

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

Sunshine

In Opelika, the average sunshine is 8.6h.

UV index

In Opelika, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health hazard from the exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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.
[Resources]

FAQ

What is the temperature in September in Opelika?

In Opelika, Alabama, in September, the average high-temperature is 86°F (30°C), and the average low-temperature is 66.7°F (19.3°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), that factores the actual air temperature with the relative humidity, in September is evaluated at 95.9°F (35.5°C).

What is the average humidity in September in Opelika?

In Opelika, Alabama, the average relative humidity in September is 72%.

How many days does it rain in September in Opelika?

In Opelika, during September, the rain falls for 14.1 days and regularly aggregates up to 2.01" (51mm) of precipitation.

What is the driest month in Opelika?

September is the month with the least rainfall. Rain falls for 14.1 days and accumulates 2.01" (51mm) of precipitation.

When it does not snow in Opelika?

In Opelika, Alabama, snow does not fall in April through November.

What is the average length of the day in September in Opelika?

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

How long on average sun shines in September in Opelika?

The average sunshine in September in Opelika, Alabama, is 8.6h.

What is the UV index intensity in September in Opelika?

The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health threat from unsafe exposure to the Sun's UV rays.

Average temperature in September
Opelika, AL

Average temperature in September - Opelika, AL
  • Average high temperature in September: 86°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (54.1°F).

  • Average low temperature in September: 66.7°F

Months with the highest average low temperature are July and August (71.2°F).
The coldest month (with the lowest average low temperature) is January (37.4°F).

[Resources]

Average pressure in September
Opelika, AL

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

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.98").

[Resources]

Average wind speed in September
Opelika, AL

Average wind speed in September - Opelika, AL
  • Average wind speed in September: 5.2mph

The windiest month (with the highest average wind speed) is January (7.7mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).

[Resources]

Average humidity in September
Opelika, AL

Average humidity in September - Opelika, AL
  • Average humidity in September: 72%

The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is October (70%).

[Resources]

Average rainfall in September
Opelika, AL

Average rainfall in September - Opelika, AL
  • Average rainfall in September: 2.01"

The wettest months (with the highest rainfall) are August and December (4.06").
The driest month (with the least rainfall) is September (2.01").

[Resources]

Average rainfall days in September
Opelika, AL

Average rainfall days in September - Opelika, AL
  • Average rainfall days in September: 14.1 days

The month with the highest number of rainy days is July (22.5 days).
The month with the least rainy days is November (7.8 days).

[Resources]

Average snowfall in September
Opelika, AL

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

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

[Resources]

Average snowfall days in September
Opelika, AL

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

The month with the highest number of snowfall days is January (0.8 days).
Months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

[Resources]

Average daylight in September /
Average sunshine in September
Opelika, AL

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

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in September: 8.6h

The month with the most sunshine is June (Average sunshine: 10.7h).
The month with the least sunshine is February (Average sunshine: 5.1h).

[Resources]

Average sunshine days in September
Opelika, AL

Average sunshine days in September - Opelika, AL
  • Average sunshine days in September: 14 days

Months with the most sunshine days are October and November (20.5 days).
The month with the least sunshine days is July (6.5 days).

[Resources]

Average UV index in September
Opelika, AL

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

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

[Resources]

Average cloud cover in September
Opelika, AL

Average cloud cover in September - Opelika, AL
  • Average cloud cover in September: 31

The month with the most cloud cover is December (Cloud cover 45).
The month with the least cloud cover is October (Cloud cover 30).

[Resources]

Average visibility in September
Opelika, AL

Average visibility in September - Opelika, 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).

[Resources]