How warm is it in Llanes in September?

Daytime highs averaged 22.2 °C, night-time lows 16.5 °C. The highest value of the past 10 years was 30.5 °C (18 Sep 2025), the lowest 11.3 °C (28 Sep 2020).

How often does it rain in Llanes in September?

On average there were 12.9 rain days (at least 1 mm) with 77.6 mm of precipitation in total.

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Llanes weather in September: temperature & rain

Photo: Tomas.senabre · CC BY-SA 2.5 es

🇪🇸 Weather in Llanes in September

This is what the weather in Llanes (Asturias, Spain) was like in September over the years 2017–2026.

Key facts at a glance

Prevailing weather: Light rain

Avg. daytime high

22.2 °C

20.3 °C – 24.8 °C

Avg. night-time low

16.5 °C

15.0 °C – 18.4 °C

Avg. rain days in period

12.9

43 % of days · ≥ 1.0 mm

Avg. precipitation in period

77.6 mm

38.9 mm – 125 mm

Avg. cloud cover

70 %

This data source has no sunshine hours – average cloud cover is shown instead.

Avg. sea temperature

–

Sea temperature unavailable for today (daily limit).

Extremes: Highest temperature 30.5 °C (18 Sep 2025) · Lowest temperature 11.3 °C (28 Sep 2020) · Avg. daily peak wind 20 km/h

Weather mix of all days

18Sunny
78Partly cloudy
53Cloudy
82Light rain
47Rain

Summary

On average 22.2 °C during the day and 16.5 °C at night.
On average 12.9 rain days (Rain day = at least 1.0 mm of precipitation) with 77.6 mm of precipitation in total.
Prevailing weather: Light rain.
Warmest year: 2023 (avg. 24.8 °C), coolest: 2017 (avg. 20.3 °C).
Wettest year: 2024 (125 mm), driest: 2018 (38.9 mm).
Extremes: 30.5 °C on 18 Sep 2025 and 11.3 °C on 28 Sep 2020.

Overall values from all 10 years. How is this calculated?

Temperatures per year

Average over your travel period

Precipitation & rain days

Year by year

2026
Avg. max24.3°Avg. min17.7°
Rain days
8 Rain days
Precipitation
53.5 mm
Avg. cloud cover
–
Sea temperature
–
Max 30.4 °C · Min 15.4 °C
2025
Avg. max22.0°Avg. min16.0°
Rain days
12 Rain days
Precipitation
76.8 mm
Avg. cloud cover
76 % cloudy
Sea temperature
–
Max 30.5 °C · Min 12.8 °C
2024
Avg. max20.3°Avg. min15.0°
Rain days
18 Rain days
Precipitation
125 mm
Avg. cloud cover
74 % cloudy
Sea temperature
–
Max 25.9 °C · Min 12.7 °C
2023
Avg. max24.8°Avg. min18.4°
Rain days
16 Rain days
Precipitation
87.4 mm
Avg. cloud cover
72 % cloudy
Sea temperature
–
Max 30.1 °C · Min 14.5 °C
2022
Avg. max22.1°Avg. min16.8°
Rain days
12 Rain days
Precipitation
97.4 mm
Avg. cloud cover
74 % cloudy
Sea temperature
–
Max 29.5 °C · Min 13.6 °C
2021
Avg. max21.9°Avg. min16.7°
Rain days
19 Rain days
Precipitation
75.6 mm
Avg. cloud cover
78 % cloudy
Sea temperature
–
Max 28.7 °C · Min 14.1 °C
2020
Avg. max22.0°Avg. min16.5°
Rain days
11 Rain days
Precipitation
94.3 mm
Avg. cloud cover
61 % cloudy
Sea temperature
–
Max 30.4 °C · Min 11.3 °C
2019
Avg. max21.5°Avg. min16.1°
Rain days
11 Rain days
Precipitation
44.3 mm
Avg. cloud cover
64 % cloudy
Sea temperature
–
Max 26.4 °C · Min 14.0 °C
2018
Avg. max22.3°Avg. min16.8°
Rain days
5 Rain days
Precipitation
38.9 mm
Avg. cloud cover
58 % cloudy
Sea temperature
–
Max 27.2 °C · Min 13.0 °C
2017
Avg. max20.3°Avg. min15.3°
Rain days
17 Rain days
Precipitation
82.6 mm
Avg. cloud cover
73 % cloudy
Sea temperature
–
Max 25.9 °C · Min 12.5 °C

Frequently asked questions

How warm is it in Llanes in September?: Daytime highs averaged 22.2 °C, night-time lows 16.5 °C. The highest value of the past 10 years was 30.5 °C (18 Sep 2025), the lowest 11.3 °C (28 Sep 2020).
How often does it rain in Llanes in September?: On average there were 12.9 rain days (at least 1 mm) with 77.6 mm of precipitation in total.

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Data sources

Weather data: Data obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program
Reanalysis (weather model constrained by observations) on a coarse grid of about 50 km. Values represent a large area and can differ from local conditions, especially on islands, coasts and in mountains. Snow depth is the model value for the grid cell, not the depth on the slopes. No sunshine duration.
Reanalysis (weather model constrained by observations)
Reanalysis values represent a grid cell (approx. 25–50 km) and may differ from local measurements on coasts, islands and in mountains.
Sea temperature: MUR SST data were provided by JPL under support by NASA MEaSUREs program; accessed via NOAA CoastWatch ERDDAP
Daily multi-scale ultra-high resolution (≈ 1 km) analysis of satellite measurements (infrared, microwave) and in-situ data. Represents the foundation temperature below the daily warm surface layer. (Satellite and in-situ analysis)
Place search: Natural Earth (public domain) · GeoNames (CC BY 4.0) / OpenStreetMap (ODbL)