September weather forecast
Carlsbad, NM

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Weather in September

The arrival of September in Carlsbad marks the beginning of the fall season, bringing a dramatic shift in weather. The city's temperatures begin to decrease, moving from 67.5°F (19.7°C) in the morning to 85.6°F (29.8°C) by afternoon, signaling the gradual retreat of summer. September brings a balance of fading summer warmth and the initial whispers of fall, resulting in the city's quintessential autumn weather. The transitional climate provides a calm and soothing ambiance, making September one of the most pleasant months to be in Carlsbad.

Temperature

September indicates a minor shift in the average high-temperature, from August's tropical 93.7°F (34.3°C) to a moderately hot 85.6°F (29.8°C). In Carlsbad, the September nights cool down to an average low of 67.5°F (19.7°C).

Heat index

The heat index in September is appraised at a tropical 86°F (30°C). Long-standing exposure coupled with ongoing activity could result in exhaustion, possibly causing heat cramps.
It is essential to grasp that the heat index's numbers are for shade and light wind settings. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'feels like', binds temperature metrics with humidity values to give a sense of the actual warmth. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.

Humidity

The average relative humidity in September is 47%.

Rainfall

September is the month with the most rainfall. Rain falls for 12.2 days and accumulates 1.85" (47mm) of precipitation.

Snowfall

April through October are months without snowfall in Carlsbad.

Daylight

The average length of the day in September is 12h and 21min.
On the first day of the month, sunrise is at 6:32 am and sunset at 7:20 pm. On the last day of September, sunrise is at 6:50 am and sunset at 6:42 pm MDT.

Sunshine

In September, the average sunshine in Carlsbad is 10.4h.

UV index

The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Updated: Feb 13, 2024 | Published by: Weather U.S. | About Us / Weather Forecasting / Data Sources

Frequently asked questions

How hot is September in Carlsbad?

During September, Carlsbad experiences an average high-temperature of 85.6°F (29.8°C) and a low-temperature of 67.5°F (19.7°C). In September, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, is appraised at 86°F (30°C).

What is the average humidity in September in Carlsbad?

The average relative humidity in September in Carlsbad, New Mexico, is 47%.

What is the rainiest month in Carlsbad?

September is the month with the most rainfall. Rain falls for 12.2 days and accumulates 1.85" (47mm) of precipitation.

How many days does it rain in September in Carlsbad?

In Carlsbad, New Mexico, during September, the rain falls for 12.2 days and regularly aggregates up to 1.85" (47mm) of precipitation.

When it does not snow in Carlsbad?

April through October are months without snowfall in Carlsbad.

How many hours of daylight does Carlsbad have in September?

In September, the average day length in Carlsbad, New Mexico, is 12h and 21min.

When are sunrise and sunset in September in Carlsbad?

On the first day of September in Carlsbad, New Mexico, sunrise is at 6:32 am and sunset at 7:20 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:42 pm MDT.

How long on average sun shines in September in Carlsbad?

The average sunshine duration in September in Carlsbad is 10.4h.

What is the UV index intensity in September in Carlsbad?

In Carlsbad, New Mexico, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Carlsbad, NM

Average temperature in September - Carlsbad, NM
  • Average high temperature in September: 85.6°F

The warmest month (with the highest average high temperature) is June (95°F).
The month with the lowest average high temperature is December (56.3°F).

  • Average low temperature in September: 67.5°F

The months with the highest average low temperature are July and August (74.8°F).
The coldest month (with the lowest average low temperature) is January (37.2°F).

Average pressure in September
Carlsbad, NM

Average pressure in September - Carlsbad, NM
  • Average pressure in September: 29.95"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).

Average wind speed in September
Carlsbad, NM

Average wind speed in September - Carlsbad, NM
  • Average wind speed in September: 9mph

The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest months (with the lowest average wind speed) are January and December (8.4mph).

Average humidity in September
Carlsbad, NM

Average humidity in September - Carlsbad, NM
  • Average humidity in September: 47%

The month with the highest relative humidity is December (48%).
The month with the lowest relative humidity is April (26%).

Average rainfall in September
Carlsbad, NM

Average rainfall in September - Carlsbad, NM
  • Average rainfall in September: 1.85"

The wettest month (with the highest rainfall) is September (1.85").
The driest month (with the least rainfall) is February (0.16").

Average rainfall days in September
Carlsbad, NM

Average rainfall days in September - Carlsbad, NM
  • Average rainfall days in September: 12.2 days

The month with the highest number of rainy days is July (12.3 days).
The month with the least rainy days is February (2.4 days).

Average snowfall in September
Carlsbad, NM

Average snowfall in September - Carlsbad, NM
  • Average snowfall in September: 0"

The month with the highest snowfall is December (0.67").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Carlsbad, NM

Average snowfall days in September - Carlsbad, NM
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (1.9 days).
The 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
Carlsbad, NM

Average daylight in September / Average sunshine in September - Carlsbad, NM
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).

  • Average sunshine in September: 10h and 2min

The month with the most sunshine is June (Average sunshine: 12h and 0min).
The months with the least sunshine are February and December (Average sunshine: 7h and 6min).

Average sunshine days in September
Carlsbad, NM

Average sunshine days in September - Carlsbad, NM
  • Average sunshine days in September: 14.8 days

The month with the most sunshine days is January (26.7 days).
The month with the least sunshine days is August (14.3 days).

Average UV index in September
Carlsbad, NM

Average UV index in September - Carlsbad, NM
  • Average UV index in September: 6

The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

Average cloud cover in September
Carlsbad, NM

Average cloud cover in September - Carlsbad, NM
  • Average cloud cover in September: 19

The months with the most cloud cover are September and December (Cloud cover 19).
The month with the least cloud cover is June (Cloud cover 11).

Average visibility in September
Carlsbad, NM

Average visibility in September - Carlsbad, NM
  • Average visibility in September: 6mi

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

Carlsbad, New Mexico, USA

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