Luxembourg Luxembourg Weather in May — Climate Guide
May in Luxembourg is very-high
Luxembourg Weather in May — Quick Answer
As of 2026- Avg temp
- 18° / 9°
- Rainfall
- 65mm · 13 days
- Crowds
- Busy
As of 2026, Luxembourg in May averages a high of 18°C and low of 9°C with 65mm of rain over about 13 days. Late spring + early summer — daytime 18°C / 64°F, nighttime 9°C / 48°F. Light shirt + jacket layers + walking-comfortable shoes. Old Town café terraces fully open. Long daylight (sunset 21:00+) supports atmospheric evening walks.
May is very-high for Luxembourg.
May is genuinely Luxembourg's sweet-spot month. Daytime 18°C / 64°F + long daylight (sunset 21:00+) + Old Quarter café terraces fully open + Mosel valley vineyards lush green + Bock and Pétrusse Casemates at full operation + Chemin de la Corniche cliff-walks atmospheric.
The canonical 'I want pre-summer-peak crowds + spring weather + atmospheric Old Town' window. Hotel rates climb to high but not yet peak summer level. EU institution + business midweek demand at full year-round rhythm — book 4-5 weeks ahead for Tue-Wed nights; 2-3 weeks for weekends.
Travel score
Spring sweet spot — long daylight + Mosel vineyards lush + Casemates full operating + atmospheric terraces
May Weather at a Glance
May averages 64°F / 18°C highs and 48°F / 9°C lows with 13 rainy days and 65mm of rain. Humidity 70%, UV 5, sunshine 7 hours. Long daylight (sunset 21:00+) returning.
May Travel Advice
Book 4-5 weeks ahead for business midweek; 2-3 weeks for weekends. Mosel valley winery tastings 1-2 weeks ahead. Chemin de la Corniche sunset walks 20:30-21:30 atmospheric.
May Pricing Trends
High pricing: boutique EUR 180-280/night / $194-302, 4-star EUR 240-380 / $260-410, 5-star EUR 320-560 / $346-605. Business midweek (Tue-Wed) +30-50% surge.
Luxembourg May Weather Stats
Avg High
18°C
Avg Low
9°C
Rainy Days
13
65mm total
Sunshine
7h
Daily avg
Humidity
70%
comfortable
UV Index
5
Moderate
Wind
11 km/h
Gusts 25
Sea Temp
11°C
swimming hotel pools
Crowds
Busy
At attractions
May Sunrise & Sunset
Air Quality
PM2.5
15 μg/m³
PM10
26 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
17°C
Nighttime
8°C
Humidity and wind affect how the actual temperature feels.
Wind
11 km/h
Max gust 25 km/h
Activities Recommended for May
May Travel Pros & Cons
Pros
- Year's first full daylight + atmospheric evening Old Town walks
- Mosel valley vineyards lush + winery tastings full schedule
- Café terraces fully open across Place d'Armes + Place Guillaume II
- Bock + Pétrusse Casemates full operating + pleasant temperatures
- Schueberfouer prep + summer concert season begins
Cons
- Hotel rates climbing to high (+30-40% vs April)
- Crowds at meaningful pre-summer increase
- 13 rainy days/month — outdoor planning still needs rain contingency
- Business midweek (Tue-Wed) +30-50% surge
May Events & Festivals
- Peak spring + early summer crowd window opens
- Mosel valley vineyards full canopy + first wine festivals
- Schueberfouer prep + summer concert season begins
- European Court of Justice + EU institutions full operating schedule
Luxembourg in May — Full Picture
May is genuinely Luxembourg's sweet-spot month. Daytime 18°C / 64°F + long daylight (sunset 21:00+) + Old Quarter café terraces fully open + Mosel valley vineyards lush green + Bock and Pétrusse Casemates at full operation + Chemin de la Corniche cliff-walks atmospheric.
The canonical 'I want pre-summer-peak crowds + spring weather + atmospheric Old Town' window. Hotel rates climb to high but not yet peak summer level. EU institution + business midweek demand at full year-round rhythm — book 4-5 weeks ahead for Tue-Wed nights; 2-3 weeks for weekends.
Mosel valley wineries hit full spring rhythm — vineyard walks + winemaker dinners + Crémant tastings. Caves St. Martin in Remich + Domaine Alice Hartmann in Wormeldange + Bernard-Massard in Grevenmacher all run weekend tastings + 5-7 wine vertical flights. Bus 175 (free under Luxembourg's policy) covers the valley.
What to Wear & What to Pack
Late spring + early summer — daytime 18°C / 64°F, nighttime 9°C / 48°F. Light shirt + jacket layers + walking-comfortable shoes. Old Town café terraces fully open. Long daylight (sunset 21:00+) supports atmospheric evening walks.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
Current14°C
5.7°C
13.3/mo
Summer (Jun·Jul·Aug)
23.3°C
13.3°C
12.3/mo
Autumn (Sep·Oct·Nov)
14°C
7°C
13.7/mo
Winter (Dec·Jan·Feb)
5°C
-0.3°C
16.3/mo
Luxembourg Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 4° | -1° | 17d·80mm | 1.5h | 85% | 1 | Quiet | Low season | |
| 6° | 0° | 15d·65mm | 2.5h | 80% | 2 | Quiet | Low season | |
| 10° | 3° | 14d·65mm | 4h | 75% | 3 | Quiet | Shoulder | |
| 14° | 5° | 13d·60mm | 5.5h | 70% | 4 | Moderate | Shoulder | |
| May (Best) | 18° | 9° | 13d·65mm | 7h | 70% | 5 | Busy | Peak |
| June (Best) | 22° | 12° | 13d·75mm | 8h | 70% | 6 | Busy | Peak |
| July (Best) | 24° | 14° | 12d·75mm | 8h | 70% | 7 | Busy | Peak |
| August (Best) | 24° | 14° | 12d·75mm | 7.5h | 70% | 6 | Busy | Peak |
| September (Best) | 20° | 11° | 12d·70mm | 6h | 75% | 4 | Busy | Peak |
| 14° | 7° | 13d·70mm | 4h | 80% | 2 | Moderate | Shoulder | |
| 8° | 3° | 16d·80mm | 2h | 85% | 1 | Quiet | Shoulder | |
| 5° | 0° | 17d·85mm | 1.5h | 85% | 1 | Busy | Peak |
View Other Months
Luxembourg May Hotel Picks
Frequently Asked Questions
Is May a good time to visit Luxembourg?
Luxembourg in May is very-high. Tourist crowds are busy and flight/hotel prices are peak.
What's the average temperature in Luxembourg in May?
Luxembourg May averages a high of 18°C and a low of 9°C.
Does it rain much in Luxembourg in May?
Luxembourg May averages 65mm of rainfall over about 13 rainy days.
What should I wear in Luxembourg in May?
Late spring + early summer — daytime 18°C / 64°F, nighttime 9°C / 48°F. Light shirt + jacket layers + walking-comfortable shoes. Old Town café terraces fully open. Long daylight (sunset 21:00+) supports atmospheric evening walks.
What time are sunrise and sunset in Luxembourg in May?
Luxembourg May sunrise is 05:30 and sunset is 21:00, with 15h 30min of daylight.
What's the air quality like in Luxembourg in May?
Luxembourg May air quality (AQI) averages 42, rated Good. PM2.5 averages 15μg/m³.
What activities are recommended in Luxembourg in May?
In May, Luxembourg is great for Bock + Pétrusse Casemates + UNESCO Old Town walking, Atmospheric evening Chemin de la Corniche walks (sunset 21:00+), Mosel valley winery weekend tastings.
Is May peak season in Luxembourg?
Luxembourg May crowds are busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Luxembourg
View Other Months
Planning a May trip to Luxembourg?
You've checked the weather — next come the budget and the route.
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.