Onís, Spain — Weather in August 2026

Climate Overview

Onís, Spain in August has warm conditions, with highs averaging 22.4°C (72°F). Rain falls on about 11 days this month. Sea temperature averages 21.1°C (70°F).

This month falls at the end of Summer.

Temperatures remain fairly steady throughout August, with daily highs around 22°C (72°F).

August sees fairly even rainfall, totalling about 77 mm across the month.

Expect around 11.9h of sunshine at the start of August, decreasing to 10.7h by the end.

The warmest days tend to fall around the 22th, averaging 23.2°C (74°F).

Monthly August Averages

Temperature

22°C / 17°C

Feels Like

25°C / 18°C

Rain

11 days · 77 mm

Sunshine

11.4h / day

Humidity

85% — Very Humid

Wind

15 km/h

Wind Direction

NNE (19°)

Gusts

30 km/h

Daylight

13.9 h

Cloud Cover

59%

Clear Sky Days

2.9

UV Index

6.1 — High

Sea Temperature

21°C

Dew Point

17°C — Humid

Moon Phase

Waxing Crescent · 3%

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 07:26

Daylight 14h

Sunset 21:26

What to Expect

Daytime temperatures around 22°C (72°F) are ideal for full-day outdoor exploration.

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

1 of the last 5 yearly records were warmer than this month's 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

Dress in layers — a mix of long sleeves, light sweaters, and a versatile jacket works best for changeable conditions.

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

Packing List

UmbrellaWaterproof jacketSunscreen (SPF 30+)SunglassesComfortable walking shoes

Frequently Asked Questions

Expand all

Is August a good time to visit Onís?

August is typically excellent for visiting Onís, with average highs of 22°C (72°F) and around 11 rainy days. Onís, Spain in August has warm conditions, with highs averaging 22.4°C (72°F). Rain falls on about 11 days this month. S

Does it rain a lot in Onís in August?

Onís typically sees around 11 rainy days in August with 77 mm (3 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Onís in August?

Evenings in Onís during August are mild at 17°C (63°F). A light cardigan is usually enough.

What should I pack for Onís in August?

With highs of 22°C (72°F) and lows of 17°C (63°F) in August, we recommend: Umbrella, Waterproof jacket, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. Comfortable walking shoes are essential.

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

Yes, August offers some of the best weather conditions in Onís with comfortable temperatures and lower chances of rain.

What is the UV index in Onís in August?

The average UV index in Onís during August is 6 (high). Wear sunscreen SPF 30+, a hat, and sunglasses. Limit direct sun exposure between 10 AM and 4 PM.

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

Onís gets approximately 14 hours of daylight per day in August, with around 11 hours of sunshine.

Does it snow in Onís in August?

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

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