September weather forecastCarlsbad, NM
September
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
The shift from August to September includes a small decrease in the average high-temperature, from a tropical 93.7°F (34.3°C) to a moderately hot 85.6°F (29.8°C). Carlsbad, in September, experiences an average temperature of 67.5°F (19.7°C) at night.Heat index
In September, the average heat index is estimated at a hot 86°F (30°C). Prolonged exposure combined with continuous activity could lead to exhaustion, and possibly heat cramps.Research indicates the heat index considers values in shaded locales and with light winds. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is an estimation of the warmth sensation when considering humidity levels. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
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.Daylight
In Carlsbad, 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
The average sunshine in September is 10.4h.UV index
In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 6 in September translates into these instructions:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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: 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: 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: 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: 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: 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: 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: 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: 12h and 24min
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 24min
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: 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: 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: 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: 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).
