Basel, Switzerland — Weather in May 2027

Climate Overview

Basel, Switzerland in May has mild conditions, with highs averaging 18.8°C (66°F) and noticeably cooler mornings. Rain falls on about 17 days this month, totalling around 129 mm.

This month falls at the end of Spring.

Daily highs in May gradually rise from around 17°C (62°F) at the start to 21°C (70°F) by month's end.

May sees fairly even rainfall, totalling about 129 mm across the month.

Expect around 9.1h of sunshine at the start of May, increasing to 11.7h by the end.

The warmest days tend to fall around the 29th, averaging 21.5°C (71°F).

Compared to April, this month is about 3°C warmer with 4 more rainy days. Temperatures will rise further into June.

Monthly May Averages

Temperature

19°C / 9°C

Feels Like

18°C / 7°C

Rain

17 days · 129 mm

Sunshine

10.1h / day

Humidity

75% — Humid

Wind

12 km/h

Wind Direction

WNW (290°)

Gusts

31 km/h

Daylight

15.1 h

Cloud Cover

66%

Clear Sky Days

2.8

UV Index

5.5 — High

Dew Point

10°C — Dry

Moon Phase

Waxing Gibbous · 66%

Snow Days

1 days · 0.5 cm

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 05:54

Daylight 15.1h

Sunset 21:01

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	6°C / -1°C	3°C / -5°C	15days (109 mm) Wet	4.7h Fair	83% Humid	1.5 Low	Poor	View Details
February	9°C / 0°C	6°C / -4°C	12days (73 mm) Wet	6.1h Fair	79% Humid	2.2 Moderate	Poor	View Details
March	12°C / 2°C	9°C / -1°C	13days (76 mm) Wet	8.1h Good	75% Muggy	3.6 Moderate	Poor	View Details
April	16°C / 5°C	14°C / 2°C	13days (89 mm) Wet	9.9h Good	73% Muggy	4.7 Moderate	Fair	View Details
May	19°C / 9°C	18°C / 7°C	17days (129 mm) Wet	10.1h Excellent	75% Muggy	5.5 High	Good	View Details
June best	24°C / 14°C	25°C / 14°C	16days (130 mm) Wet	11.7h Excellent	72% Muggy	6.5 High	Excellent	View Details
July best	26°C / 16°C	27°C / 16°C	14days (109 mm) Wet	12.1h Excellent	66% Muggy	6.4 High	Excellent	View Details
August best	26°C / 16°C	27°C / 16°C	13days (109 mm) Wet	10.7h Excellent	69% Muggy	5.7 High	Excellent	View Details
September best	22°C / 12°C	21°C / 11°C	12days (87 mm) Wet	9h Good	74% Muggy	4.3 Moderate	Excellent	View Details
October best	17°C / 7°C	16°C / 6°C	13days (89 mm) Wet	6.6h Fair	82% Humid	2.7 Moderate	Good	View Details
November	10°C / 2°C	8°C / -1°C	14days (98 mm) Wet	5.1h Fair	85% Humid	1.6 Low	Poor	View Details
December	7°C / 0°C	4°C / -4°C	14days (95 mm) Wet	4.2h Fair	86% Very Muggy	1.2 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

Warm evening layerUmbrellaWaterproof jacketWaterproof shoes

Frequently Asked Questions

Expand all

Is May a good time to visit Basel?

May is typically good for visiting Basel, with average highs of 19°C (66°F) and around 17 rainy days. Basel, Switzerland in May has mild conditions, with highs averaging 18.8°C (66°F) and noticeably cooler mornings. Rain f

Does it rain a lot in Basel in May?

Basel typically sees around 17 rainy days in May with 129 mm (5.1 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Basel in May?

Nights in Basel during May are cool at around 9°C (48°F). Bring a jacket or sweater for evenings.

What should I pack for Basel in May?

With highs of 19°C (66°F) and lows of 9°C (48°F) in May, we recommend: Warm evening layer, Umbrella, Waterproof jacket, Waterproof shoes. Comfortable walking shoes are essential.

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

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

What is the UV index in Basel in May?

The average UV index in Basel 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 Basel in May?

Basel gets approximately 15 hours of daylight per day in May, with around 10 hours of sunshine.

Does it snow in Basel in May?

Yes, Basel typically sees around 1 snow days in May with roughly 1 cm (0 in) of snowfall.

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