Hernani, Spain — Weather in May 2027

Climate Overview

Hernani, Spain in May has mild conditions, with highs averaging 17.9°C (64°F) and noticeably cooler mornings. Rain falls on about 17 days this month, totalling around 110 mm. Sea temperature stays cool at 16.7°C (62°F).

This month falls at the end of Spring.

Daily highs in May gradually rise from around 17°C (62°F) at the start to 20°C (68°F) by month's end.

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

Expect around 10.7h of sunshine at the start of May, increasing to 11.6h by the end.

Wind speeds ease off through the month, from 18 km/h (11 mph) to 14 km/h (9 mph).

The warmest days tend to fall around the 30th, averaging 20.2°C (68°F).

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

Monthly May Averages

Temperature

18°C / 12°C

Feels Like

18°C / 11°C

Rain

17 days · 110 mm

Sunshine

10.7h / day

Humidity

80% — Very Humid

Wind

17 km/h

Wind Direction

NW (314°)

Gusts

35 km/h

Daylight

14.7 h

Cloud Cover

68%

Clear Sky Days

1.6

UV Index

6.3 — High

Sea Temperature

17°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 06:46

Daylight 14.7h

Sunset 21:26

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	11°C / 6°C	8°C / 3°C	16days (164 mm) Wet	5.6h Fair	80% Humid	1.9 Low	Poor	View Details
February	13°C / 7°C	10°C / 4°C	14days (123 mm) Wet	7h Good	78% Humid	2.8 Moderate	Fair	View Details
March	14°C / 8°C	11°C / 5°C	17days (127 mm) Wet	8.5h Good	75% Muggy	4.2 Moderate	Fair	View Details
April	16°C / 10°C	14°C / 7°C	15days (105 mm) Wet	9.7h Good	76% Humid	5.6 High	Good	View Details
May	18°C / 12°C	18°C / 11°C	17days (110 mm) Wet	10.7h Excellent	80% Humid	6.3 High	Good	View Details
June best	21°C / 16°C	23°C / 16°C	15days (121 mm) Wet	10.6h Excellent	83% Humid	6.5 High	Excellent	View Details
July best	23°C / 17°C	25°C / 18°C	13days (68 mm) Wet	11.2h Excellent	81% Humid	6.6 High	Excellent	View Details
August best	24°C / 18°C	26°C / 19°C	12days (91 mm) Wet	10.8h Excellent	81% Humid	6.1 High	Excellent	View Details
September best	22°C / 16°C	23°C / 16°C	13days (115 mm) Wet	9.6h Good	79% Humid	4.9 Moderate	Excellent	View Details
October	20°C / 14°C	19°C / 13°C	12days (126 mm) Wet	7.7h Good	78% Humid	3.5 Moderate	Good	View Details
November	15°C / 10°C	13°C / 7°C	17days (189 mm) Wet	6.1h Fair	79% Humid	2.1 Moderate	Wet	View Details
December	13°C / 8°C	10°C / 5°C	15days (160 mm) Wet	5.6h Fair	80% Humid	1.6 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 Hernani?

May is typically good for visiting Hernani, with average highs of 18°C (64°F) and around 17 rainy days. Hernani, Spain in May has mild conditions, with highs averaging 17.9°C (64°F) and noticeably cooler mornings. Rain falls

Does it rain a lot in Hernani in May?

Hernani typically sees around 17 rainy days in May with 110 mm (4.3 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Hernani in May?

Nights in Hernani during May are cool at around 12°C (54°F). Bring a jacket or sweater for evenings.

What should I pack for Hernani in May?

With highs of 18°C (64°F) and lows of 12°C (54°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 Hernani?

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

What is the UV index in Hernani in May?

The average UV index in Hernani 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 Hernani in May?

Hernani gets approximately 15 hours of daylight per day in May, with around 11 hours of sunshine.

Does it snow in Hernani in May?

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

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