Lyss, Switzerland — Weather in May 2027

Climate Overview

Lyss, Switzerland in May has mild conditions, with highs averaging 18°C (64°F) and noticeably cooler mornings. Rain falls on about 17 days this month, totalling around 134 mm.

This month falls at the end of Spring.

Daily highs in May gradually rise from around 16°C (60°F) at the start to 20°C (69°F) by month's end.

May sees fairly even rainfall, totalling about 133 mm across the month.

Expect around 9.3h of sunshine at the start of May, increasing to 11.8h by the end.

The warmest days tend to fall around the 29th, averaging 20.5°C (69°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

18°C / 9°C

Feels Like

17°C / 8°C

Rain

17 days · 134 mm

Sunshine

10.4h / day

Humidity

76% — Humid

Wind

12 km/h

Wind Direction

NW (313°)

Gusts

32 km/h

Daylight

15.1 h

Cloud Cover

68%

Clear Sky Days

2.1

UV Index

5.6 — High

Dew Point

9°C — Dry

Moon Phase

Waxing Gibbous · 66%

Snow Days

1 days · 0.6 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 05:57

Daylight 15.1h

Sunset 21:00

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	5°C / -1°C	2°C / -4°C	15days (107 mm) Wet	5.2h Fair	84% Humid	1.6 Low	Poor	View Details
February	9°C / 0°C	6°C / -3°C	12days (73 mm) Wet	6.6h Fair	79% Humid	2.3 Moderate	Poor	View Details
March	11°C / 2°C	9°C / -1°C	13days (78 mm) Wet	8.4h Good	75% Muggy	3.7 Moderate	Poor	View Details
April	15°C / 5°C	13°C / 3°C	13days (85 mm) Wet	10.3h Excellent	72% Muggy	5.1 High	Fair	View Details
May	18°C / 9°C	17°C / 8°C	17days (134 mm) Wet	10.4h Excellent	76% Humid	5.6 High	Good	View Details
June best	23°C / 14°C	24°C / 14°C	15days (108 mm) Wet	11.9h Excellent	74% Muggy	6.7 High	Excellent	View Details
July best	25°C / 16°C	26°C / 17°C	15days (115 mm) Wet	12.2h Excellent	71% Muggy	6.6 High	Excellent	View Details
August best	25°C / 16°C	26°C / 17°C	12days (105 mm) Wet	11.1h Excellent	73% Muggy	5.8 High	Excellent	View Details
September best	21°C / 13°C	20°C / 12°C	11days (88 mm) Wet	9.1h Good	78% Humid	4.4 Moderate	Excellent	View Details
October best	16°C / 8°C	15°C / 7°C	12days (91 mm) Wet	7.2h Good	82% Humid	2.9 Moderate	Good	View Details
November	10°C / 3°C	7°C / 1°C	14days (99 mm) Wet	5.6h Fair	86% Very Muggy	1.8 Low	Poor	View Details
December	6°C / 0°C	4°C / -3°C	14days (102 mm) Wet	4.7h Fair	87% Very Muggy	1.3 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

Warm evening layerUmbrellaWaterproof jacketWaterproof shoes

Frequently Asked Questions

Expand all

Is May a good time to visit Lyss?

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

Does it rain a lot in Lyss in May?

Lyss typically sees around 17 rainy days in May with 134 mm (5.3 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Lyss in May?

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

What should I pack for Lyss in May?

With highs of 18°C (64°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 Lyss?

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

What is the UV index in Lyss in May?

The average UV index in Lyss 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 Lyss in May?

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

Does it snow in Lyss in May?

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

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