Siegen, Germany — Weather in May 2027

Climate Overview

Siegen, Germany in May has mild conditions, with highs averaging 17.5°C (64°F) and noticeably cooler mornings. Rain falls on about 12 days this month.

This month falls at the end of Spring.

Daily highs in May gradually rise from around 15°C (59°F) at the start to 20°C (67°F) by month's end.

May sees fairly even rainfall, totalling about 83 mm across the month.

Expect around 10.1h of sunshine at the start of May, increasing to 11.7h by the end.

The warmest days tend to fall around the 31th, averaging 20.1°C (68°F).

Compared to April, this month is about 4°C warmer with 0 fewer rainy days. Temperatures will rise further into June.

Monthly May Averages

Temperature

18°C / 9°C

Feels Like

16°C / 7°C

Rain

12 days · 81 mm

Sunshine

10.8h / day

Humidity

74% — Humid

Wind

16 km/h

Wind Direction

NNE (12°)

Gusts

36 km/h

Daylight

15.6 h

Cloud Cover

63%

Clear Sky Days

3.1

UV Index

5.7 — High

Dew Point

9°C — Dry

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 05:40

Daylight 15.5h

Sunset 21:11

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.

2 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	4°C / -1°C	0°C / -5°C	17days (124 mm) Wet	2.8h Poor	91% Very Muggy	1 Low	Poor	View Details
February	6°C / 0°C	2°C / -4°C	14days (93 mm) Wet	4.9h Fair	86% Very Muggy	1.6 Low	Poor	View Details
March	9°C / 2°C	6°C / -2°C	14days (84 mm) Wet	7h Good	80% Humid	3.4 Moderate	Poor	View Details
April	13°C / 4°C	11°C / 1°C	12days (64 mm) Wet	9.6h Good	75% Muggy	4.3 Moderate	Fair	View Details
May best	18°C / 9°C	16°C / 7°C	12days (81 mm) Wet	10.8h Excellent	74% Muggy	5.7 High	Good	View Details
June best	22°C / 13°C	22°C / 12°C	12days (82 mm) Wet	11.6h Excellent	74% Muggy	6.3 High	Excellent	View Details
July best	22°C / 14°C	22°C / 14°C	13days (79 mm) Wet	11.3h Excellent	73% Muggy	5.9 High	Excellent	View Details
August best	23°C / 15°C	23°C / 14°C	13days (70 mm) Wet	10.5h Excellent	75% Muggy	5.5 High	Excellent	View Details
September best	19°C / 11°C	18°C / 10°C	11days (77 mm) Wet	8.5h Good	79% Humid	4.1 Moderate	Good	View Details
October	14°C / 8°C	12°C / 6°C	14days (88 mm) Wet	5.1h Fair	87% Very Muggy	2.3 Moderate	Fair	View Details
November	8°C / 3°C	5°C / 0°C	15days (77 mm) Wet	3.5h Poor	91% Very Muggy	1.2 Low	Poor	View Details
December	5°C / 1°C	2°C / -2°C	15days (106 mm) Wet	2.1h Poor	93% Very Muggy	0.8 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 jacketComfortable walking shoes

Frequently Asked Questions

Expand all

Is May a good time to visit Siegen?

May is typically good for visiting Siegen, with average highs of 18°C (64°F) and around 12 rainy days. Siegen, Germany in May has mild conditions, with highs averaging 17.5°C (64°F) and noticeably cooler mornings. Rain fall

Does it rain a lot in Siegen in May?

Siegen typically sees around 12 rainy days in May with 81 mm (3.2 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Siegen in May?

Nights in Siegen during May are cool at around 9°C (47°F). Bring a jacket or sweater for evenings.

What should I pack for Siegen in May?

With highs of 18°C (64°F) and lows of 9°C (47°F) in May, we recommend: Layered clothing, Light jacket, Umbrella, Waterproof jacket, Comfortable walking shoes. Comfortable walking shoes are essential.

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

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

What is the UV index in Siegen in May?

The average UV index in Siegen 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 Siegen in May?

Siegen gets approximately 16 hours of daylight per day in May, with around 11 hours of sunshine.

Does it snow in Siegen in May?

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

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