Onís, Spain — Weather in May 2027

Climate Overview

Onís, Spain in May has mild conditions, with highs averaging 17.3°C (63°F) and noticeably cooler mornings. Rain falls on about 15 days this month, totalling around 104 mm. Sea temperature stays cool at 15.7°C (60°F).

This month falls at the end of Spring.

Daily highs in May gradually rise from around 16°C (62°F) at the start to 19°C (67°F) by month's end.

May sees fairly even rainfall, totalling about 104 mm across the month.

Expect around 11.4h of sunshine at the start of May, increasing to 12.4h by the end.

The warmest days tend to fall around the 30th, averaging 19.8°C (68°F).

Compared to April, this month is about 2°C warmer with 1 more rainy days. Temperatures will rise further into June.

Monthly May Averages

Temperature

17°C / 11°C

Feels Like

18°C / 10°C

Rain

15 days · 104 mm

Sunshine

11.6h / day

Humidity

83% — Very Humid

Wind

16 km/h

Wind Direction

N (9°)

Gusts

32 km/h

Daylight

14.7 h

Cloud Cover

67%

Clear Sky Days

2.2

UV Index

6.4 — High

Sea Temperature

16°C

Dew Point

12°C — Comfortable

Moon Phase

Waxing Gibbous · 66%

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 06:57

Daylight 14.7h

Sunset 21:38

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.

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

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 May a good time to visit Onís?

May is typically good for visiting Onís, with average highs of 17°C (63°F) and around 15 rainy days. Onís, Spain in May has mild conditions, with highs averaging 17.3°C (63°F) and noticeably cooler mornings. Rain falls on

Does it rain a lot in Onís in May?

Onís typically sees around 15 rainy days in May with 104 mm (4.1 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Onís in May?

Nights in Onís during May are cool at around 11°C (53°F). Bring a jacket or sweater for evenings.

What should I pack for Onís in May?

With highs of 17°C (63°F) and lows of 11°C (53°F) in May, we recommend: Layered clothing, Light jacket, Umbrella, Waterproof jacket, Waterproof shoes. Comfortable walking shoes are essential.

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

May 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 May?

The average UV index in Onís during May 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 May?

Onís gets approximately 15 hours of daylight per day in May, with around 12 hours of sunshine.

Does it snow in Onís in May?

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

Last updated: