Onís, Spain — Weather in December 2026

Climate Overview

Onís, Spain in December has mild conditions, with highs averaging 13.3°C (56°F) and noticeably cooler mornings. Rain falls on about 15 days this month, totalling around 159 mm. Sea temperature stays cool at 15.1°C (59°F).

This month falls at the beginning of Winter.

Temperatures remain fairly steady throughout December, with daily highs around 13°C (55°F).

Rainfall is heaviest during the first third of the month, while the last third tends to be drier.

The warmest days tend to fall around the 23th, averaging 14.1°C (57°F).

Compared to November, this month is about 2°C cooler with 1 fewer rainy days.

Monthly December Averages

Temperature

13°C / 7°C

Feels Like

11°C / 5°C

Rain

15 days · 159 mm

Sunshine

5.8h / day

Humidity

82% — Very Humid

Wind

17 km/h

Wind Direction

SSW (204°)

Gusts

39 km/h

Daylight

9 h

Cloud Cover

68%

Clear Sky Days

3.1

UV Index

1.8 — Low

Sea Temperature

15°C

Dew Point

7°C — Dry

Moon Phase

Waxing Crescent · 31%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

HighLow

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 08:47

Daylight 9h

Sunset 17:46

What to Expect

Keep afternoons flexible as tropical showers are common — they typically clear within an hour.

Wet weather can spread across much of the day, so it is best to keep outdoor plans flexible.

Recent yearly records for December have stayed close to the long-run average.

Compare Months

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January	12°C / 6°C	9°C / 3°C	15days (144 mm) Wet	6.2h Fair	81% Humid	2.1 Moderate	Poor	View Details
February	13°C / 6°C	11°C / 3°C	13days (118 mm) Wet	7.5h Good	81% Humid	2.8 Moderate	Fair	View Details
March	14°C / 7°C	12°C / 4°C	16days (121 mm) Wet	9.3h Good	80% Humid	4.3 Moderate	Fair	View Details
April	15°C / 9°C	14°C / 7°C	14days (105 mm) Wet	10.5h Excellent	81% Humid	5.7 High	Good	View Details
May	17°C / 11°C	18°C / 10°C	15days (104 mm) Wet	11.6h Excellent	83% Humid	6.4 High	Good	View Details
June best	20°C / 15°C	21°C / 14°C	15days (124 mm) Wet	11.4h Excellent	86% Very Muggy	6.3 High	Good	View Details
July best	22°C / 16°C	24°C / 17°C	12days (65 mm) Wet	12.1h Excellent	85% Humid	6.8 High	Excellent	View Details
August best	22°C / 17°C	25°C / 18°C	11days (77 mm) Wet	11.4h Excellent	85% Humid	6.1 High	Excellent	View Details
September best	21°C / 15°C	22°C / 15°C	14days (126 mm) Wet	10h Excellent	84% Humid	5 Moderate	Excellent	View Details
October best	19°C / 13°C	19°C / 12°C	13days (124 mm) Wet	8.3h Good	82% Humid	3.6 Moderate	Good	View Details
November	15°C / 9°C	13°C / 7°C	16days (186 mm) Wet	6.8h Fair	82% Humid	2.2 Moderate	Wet	View Details
December	13°C / 7°C	11°C / 5°C	15days (159 mm) Wet	5.8h Fair	82% Humid	1.8 Low	Poor	View Details

What to Wear

Bundle up with a warm coat, scarf, and closed-toe shoes. Thermal layers underneath give flexibility between indoors and outdoors.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

Layered clothingLight jacketUmbrellaWaterproof jacketWaterproof shoes

Frequently Asked Questions

Expand all

Is December a good time to visit Onís?

December is typically poor for visiting Onís, with average highs of 13°C (56°F) and around 15 rainy days. Onís, Spain in December has mild conditions, with highs averaging 13.3°C (56°F) and noticeably cooler mornings. Rain fal

Does it rain a lot in Onís in December?

Onís typically sees around 15 rainy days in December with 159 mm (6.3 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Onís in December?

Nights in Onís during December are cool at around 7°C (45°F). Bring a jacket or sweater for evenings.

What should I pack for Onís in December?

With highs of 13°C (56°F) and lows of 7°C (45°F) in December, we recommend: Layered clothing, Light jacket, Umbrella, Waterproof jacket, Waterproof shoes. Comfortable walking shoes are essential.

Is December among the best months weather-wise in Onís?

December is not the most favourable month weather-wise in Onís. Consider visiting during months with milder temperatures or less rainfall for a better experience.

What is the UV index in Onís in December?

The average UV index in Onís during December is 2 (low). No special sun protection is needed.

How many hours of daylight are there in Onís in December?

Onís gets approximately 9 hours of daylight per day in December, with around 6 hours of sunshine.

Does it snow in Onís in December?

Snow is uncommon in Onís during December based on 10-year climate averages.

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