Western Europe in September: Weather, Crowds & What to Expect
Climate Map for September
Average temperature across Western Europe in September.
Country Weather in September
| Country | High | Low | Rain | UV | Feels |
|---|---|---|---|---|---|
| France | 21° | 12° | 54 mm | moderate | Cool |
| Netherlands | 19° | 11° | 86 mm | moderate | Cool |
| Belgium | 20° | 11° | 64 mm | moderate | Cool |
| Luxembourg | 19° | 10° | 67 mm | moderate | Cool |
| Monaco | 23° | 17° | 76 mm | high | Mild |
Representative figures from each country's largest city. High / low are average daily temperatures (°C); “Feels” allows for humidity.
The British Isles (United Kingdom & Ireland)
Early autumn in September delivers comfortable conditions: temperatures generally fall to the mid-teens and Atlantic rainbands become more frequent, especially in the west. Vineyards in southern England and garden walks in Ireland are pleasant and many popular attractions quieten after the summer rush, making city breaks around London or Dublin enjoyable. Keep a lightweight waterproof and check weather before long coastal walks; shoulder-season rates return for many hotels.
The Low Countries & Northern France (Netherlands, Belgium, Luxembourg, Northern France)
A crispness returns in September with daytime temperatures easing to around 15-20°C and foliage beginning to show autumn colours in parks like Luxembourg Gardens. Rain increases again as Atlantic systems pick up; this is an attractive shoulder season for quieter streets, wine harvest events in northern Burgundy (just south of the region) and pleasant cycling. Pack layers and expect variable weather-sunny mornings can turn rainy by afternoon.
Paris & Central France (Paris, Loire Valley, Burgundy, Champagne)
September cools pleasantly to comfortable daytime temperatures (15-22°C) and is one of the best months for wine-related travel as harvest activity begins in Bordeaux and Burgundy. Parisian streets return to normal after summer holidays and cultural calendars restart, making it an excellent time for museums and exhibitions. Evenings are cooler-bring a jacket-and occasional early autumn rain is possible.
The Alps (French, Swiss & Italian Alps)
Early autumn in September brings crisp mornings, clear skies and diminishing crowds; daytime temperatures fall to about 10-18°C in valleys while higher ridges get early snow. Lifts start closing by mid-to-late month in many areas but low-elevation trekking remains excellent; this is a favourite time for photographers chasing clear mountain light. Check seasonal lift schedules and hut closures before setting routes.
Mediterranean Coast & Islands (French Riviera, Liguria & Catalonia; Corsica & Balearics)
September offers continued warmth with daytime temperatures often still in the low-to-mid 20s and sea conditions calming, making it one of the best months for combining beach time with cultural sightseeing in towns like Nice, Genoa and Palma. Harvest festivals and late-season seafood events enliven many ports, and shoulder-season rates improve. Bring a mix of summer clothes and a light jacket for cooler coastal nights.
Atlantic France & Northern Iberia (Brittany, Bordeaux, Basque Country, Galicia & Northern Portugal)
September is widely regarded as one of the best months: warm sea temperatures persist while daytime highs ease to 18-24°C and crowds thin after summer. Harvest activity starts in wine regions and seafood festivals continue along the coast; this is an ideal month for surfing, vineyard visits and coastal drives. Carry a light jacket for cooler mornings and check local ferry timetables as some services reduce frequency.
Iberian Interior & Southern Spain & Portugal (Madrid, Andalusia, Extremadura, Algarve)
September starts to cool gradually: coastal highs commonly 24-29°C and inland temperatures fall into the mid-20s, while sea temperatures stay warm for swimming. Harvest activities begin in wine regions and cultural life resumes after summer holidays, making it a fine month for food and wine tourism. Evenings are comfortable, and shoulder-season advantages include lower prices and fewer crowds.