Monthly climate guide

Andorra la Vella weather in September

Expect mild weather in Andorra la Vella in September: afternoons reach about 19°C (66°F), while nights drop to around 7°C (45°F). Around 49 mm of rain falls over the month (fairly dry), and skies are a mix of sun and cloud. Daytime highs are 4°C cooler than August and 5°C warmer than October.

What stands out in September

Temperatures are falling — expect highs around 5°C lower by October.
September is Andorra la Vella's third warmest month.
In Andorra la Vella, September is early autumn.
Evenings cool off sharply: the daily range is around 12°C, so pack a layer.

Avg high

19°C

66°F

Avg low

7°C

45°F

Rainfall

49 mm

fairly dry

Humidity

70%

relative

Sky

51%

cloud · a mix of sun and cloud

Live Andorra la Vella forecast Where else to go in September

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Andorra la Vella weather by month

Low → high °C Rain (mm)

Show the monthly averages as a table

Average monthly climate in Andorra la Vella
Month	Avg high	Avg low	Rain	Humidity	Cloud cover
January	3°C / 37°F	-5°C / 23°F	64 mm	84%	62%
February	3°C / 37°F	-6°C / 22°F	59 mm	83%	64%
March	6°C / 44°F	-3°C / 27°F	65 mm	80%	64%
April	11°C / 51°F	0°C / 32°F	77 mm	78%	65%
May	14°C / 57°F	3°C / 38°F	78 mm	76%	65%
June	19°C / 66°F	8°C / 46°F	59 mm	71%	59%
July	23°C / 73°F	10°C / 50°F	55 mm	65%	48%
August	23°C / 74°F	10°C / 51°F	46 mm	64%	47%
September	19°C / 66°F	7°C / 45°F	49 mm	70%	51%
October	14°C / 58°F	4°C / 38°F	70 mm	77%	54%
November	7°C / 45°F	-1°C / 30°F	82 mm	85%	61%
December	4°C / 39°F	-3°C / 26°F	53 mm	82%	60%

What to pack for September

A warm sweater or fleece for layering
A mid-weight jacket
An extra layer — evenings are noticeably cooler than afternoons
A small travel umbrella, just in case

Full season-by-season packing guide →

Is September a good time to visit Andorra la Vella?

Compare the months in the chart above to find your ideal window.

Best time to visit Andorra la Vella →

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Andorra la Vella weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/andorra/andorra-la-vella/september

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Andorra la Vella in September: quick answers

Is September a good time to visit Andorra la Vella?

Yes. September is one of the best months for Andorra la Vella, with highs around 19°C and about 49 mm of rain.

How warm is Andorra la Vella in September?

Average highs are about 19°C (66°F) and average lows about 7°C (45°F), based on 10 years of daily data.

Does it rain a lot in Andorra la Vella in September?

Andorra la Vella typically gets around 49 mm of rain in September — fairly dry.

Figures are long-term averages for the area around Andorra la Vella (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.