September Weather in Carlsbad

Last updated: March 2, 2024

The weather in Carlsbad, United States, during September is characterized by an average temperature of 25°C (78°F). Highs can soar to 37°C (99°F), while lows may dip to 13°C (55°F). Typically, the humidity level in Carlsbad throughout September hovers around 67%.

13°C (55°F)

Minimum temperature

25°C (78°F)

Average temperature

37°C (99°F)

Maximum temperature

67%

Humidity

Precipitation and Sunshine hours

In September, Carlsbad averages 73 mm (2.9 inches) of rainfall, typically over the course of 6 rainy days. The month enjoys an average of 12 hours 18 minutes of daylight, with the sun shining for approximately 9 hours 40 minutes each day. Additionally, there is a 74% probability of sunny days during this period.

73 mm (2.9 inches)

Precipitation

6 rainy days

Rainy days

9 hours 40 minutes

Sunshine hours

74%

Chance of sun

UV Index

In September, the UV Index in Carlsbad reaches a maximum of 11, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 10 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00
UVI	0	1	2	4	6	9	11	11	9	7	4	2	1
Exposure	Low			Moderate	High	VeryHigh	Extreme		VeryHigh	High	Moderate	Low
Time to burn	45 min			30 min	25 min	15 min	10 min		15 min	25 min	30 min	45 min