September weather - Autumn 2024

Weather in September
Frequently asked questions
Average temperature in September
Average pressure in September
Average wind speed in September
Average humidity in September
Average rainfall in September
Average rainfall days in September
Average sea temperature in September
Average daylight in September
Average sunshine in September
Average sunshine days in September
Average UV index in September
Average cloud cover in September
Average visibility in September

The Roman amphitheater in Cartagena, Spain, with more buildings and distant mountains in the background

Weather in September

With the arrival of September, Cartagena sees the first signs of autumn as a gentle reprieve starts to temper the peak summer heat. The monthly temperature range declines from the summer heights, oscillating between 22.7°C (72.9°F) and 26°C (78.8°F). However, rainfall begins to ramp up, totaling 37mm (1.46") over about 6.5 days, indicating the most rain-soaked month in the year. The sea remains warm at about 24.4°C (75.9°F), a vestige of the blazing summer. September sits at the crossroads of seasons, depicting a blend of summer's lingering heat and autumn's cooling touch.

Temperature

September's arrival shows an average high-temperature of a still moderately hot 26°C (78.8°F), hardly different from the previous month. In Cartagena, the month of September brings a consistent average low-temperature of 22.7°C (72.9°F), slightly cooler than its daytime highs.

Humidity

In Cartagena, the average relative humidity in September is 70%.

Rainfall

The month with the most rainfall in Cartagena, Spain, is September, when the rain falls for 6.5 days and typically aggregates up to 37mm (1.46") of precipitation.

Sea temperature

In Cartagena, the average seawater temperature in September is 24.4°C (75.9°F).
Note: Every individual's cold threshold differs, but factors like today's sunshine, wind, and temperature can tip the scales for a delightful swim in 24.4°C (75.9°F) waters. For reference, Olympians swim in waters of 25°C (77°F) to 28°C (82.4°F).

Daylight

In September, the average length of the day in Cartagena is 12h and 25min.
On the first day of the month, sunrise is at 07:34 and sunset at 20:33. On the last day of September, sunrise is at 07:59 and sunset at 19:48 CEST.

Sunshine

In September, the average sunshine in Cartagena is 9.4h.

UV index

In September, the average daily maximum UV index in Cartagena is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 6 in September transforms into the following instructions:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Opt for tightly woven and loose clothing to enhance protection from the Sun. Caution! The mirror effect of sand and water ups the UV radiation strength.

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Frequently asked questions

What is the temperature in September in Cartagena?

September temperatures vary between a high-temperature of 26°C (78.8°F) and a low-temperature of 22.7°C (72.9°F). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is appraised at 31°C (87.8°F).

What is the average humidity in September in Cartagena?

The average relative humidity in September is 70%.

What is the rainiest month in Cartagena?

September is the month with the most rainfall. Rain falls for 6.5 days and accumulates 37mm (1.46") of precipitation.

How much does it rain in Cartagena in September?

In Cartagena, Spain, during September, the rain falls for 6.5 days and regularly aggregates up to 37mm (1.46") of precipitation.

What is the water temperature in September in Cartagena?

In Cartagena, Spain, in September, the average water temperature is 24.4°C (75.9°F). For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 24.4°C (75.9°F).

How many hours of daylight does Cartagena have in September?

The average day length in September is 12h and 25min.

When is the sunrise / sunset in September in Cartagena?

On the first day of September in Cartagena, sunrise is at 07:34 and sunset at 20:33. On the last day of the month, sunrise is at 07:59 and sunset at 19:48 CEST.

How many hours of sunshine does Cartagena have in September?

In Cartagena, the average sunshine duration in September is 9.4h.

How high is the UV index in September in Cartagena?

In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health threat from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

28.2°C 82.8°F

26°C 78.8°F

23.2°C 73.8°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

14.5km/h 9mph

14.3km/h 8.9mph

13.7km/h 8.5mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

3.3

6.5

6.8

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

25.7

22.5

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Cartagena, Spain

Average high temperature in September: 26°C

The warmest month (with the highest average high temperature) is August (28.2°C).
The month with the lowest average high temperature is January (15.2°C).

Average low temperature in September: 22.7°C

The month with the highest average low temperature is August (24.5°C).
The coldest month (with the lowest average low temperature) is February (11.2°C).

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Average pressure in September
Cartagena, Spain

Average pressure in September: 1016.4mbar

The month with the highest atmospheric pressure is December (1022mbar).
The month with the lowest atmospheric pressure is April (1014.9mbar).

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Average wind speed in September
Cartagena, Spain

Average wind speed in September: 13.6km/h

The windiest month (with the highest average wind speed) is February (17.4km/h).
The calmest month (with the lowest average wind speed) is October (12.3km/h).

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Average humidity in September
Cartagena, Spain

Average humidity in September: 70%

The month with the highest relative humidity is August (72%).
The month with the lowest relative humidity is November (65%).

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Average rainfall in September
Cartagena, Spain

Average rainfall in September: 37mm

The wettest month (with the highest rainfall) is September (37mm).
The driest month (with the least rainfall) is July (3mm).

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Average rainfall days in September
Cartagena, Spain

Average rainfall days in September: 6.5 days

The month with the highest number of rainy days is March (8.4 days).
The month with the least rainy days is July (2.3 days).

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Average sea temperature in September
Cartagena, Spain

Average sea temperature in September: 24.4°C

The best month for swimming (with the highest average sea temperature) is August (25.9°C).
The coldest month (with the lowest average sea temperature) is February (14.3°C).

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Average daylight in September /
Average sunshine in September
Cartagena, Spain

Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

Average sunshine in September: 9h and 2min

The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

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Average sunshine days in September
Cartagena, Spain

Average sunshine days in September: 22.5 days

The month with the most sunshine days is July (27.9 days).
The month with the least sunshine days is April (20.7 days).

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Average UV index in September
Cartagena, Spain

Average UV index in September: 6

The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 4).

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Average cloud cover in September
Cartagena, Spain

Average cloud cover in September: 18

The months with the most cloud cover are March, April and December (Cloud cover 26).
The month with the least cloud cover is July (Cloud cover 9).

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Average visibility in September
Cartagena, Spain

Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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September weather forecast
Cartagena, Spain

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