How we know: Sources are listed at the end. Weather figures are official 1991–2020 climate normals for each city as reproduced on Wikipedia; the fare commentary is demand-calendar reasoning, not measured averages. Wildly does not publish fare figures in prose; live prices are on the linked route pages.
There is no single best time to visit Europe, because Stockholm in January and Athens in January are different planets. What there is: a predictable demand calendar (summer and Christmas are expensive, the rest is not) and a climate map that tells you which region is pleasant in which month. Put those together and the answer for most trips is May–early June or September–early October, with winter for the Mediterranean cities and summer reserved for the far north. This post is the month-by-month map; for the specific case for shoulder season, see the Europe shoulder season guide.
Europe's climate at a glance
Average daily highs, 1991–2020 normals, for one representative city per region. Full monthly tables are on each city's Wikipedia climate page (see Sources) and in the country posts linked below.
| City (region) | January | April | July | October | Wettest months | |---|---|---|---|---|---| | London (UK & Ireland) | 47°F | 59°F | 75°F | 60°F | Oct–Jan | | Paris (France, Benelux) | 46°F | 62°F | 78°F | 62°F | May, Dec | | Prague (Central Europe) | 39°F | 61°F | 80°F | 58°F | May–Aug | | Stockholm (Scandinavia) | 34°F | 51°F | 74°F | 50°F | Jun–Aug | | Rome (Italy) | 55°F | 68°F | 91°F | 73°F | Oct–Dec | | Lisbon (Iberia) | 59°F | 69°F | 83°F | 73°F | Oct–Jan | | Athens (Greece, E. Med) | 56°F | 70°F | 94°F | 76°F | Nov–Jan |
Three patterns fall out of that table. Northern and central Europe are cold and dark from November to March and get most of their rain in summer showers. The Mediterranean is mild in winter, hot in July–August, and gets its rain from October to January. And the spring and autumn columns are close to each other almost everywhere, which is why the two shoulder seasons behave so similarly.
Month by month
January–February. The quietest months of the year on the continent and the softest period of the year for transatlantic demand outside the Christmas fortnight. Northern capitals are cold with eight hours of daylight; London, Paris and Amsterdam function normally with museum-focused itineraries. Lisbon, Seville, Rome and Athens are mild (highs in the mid-50s to 60°F) and largely tourist-free. Alpine ski resorts are at their peak. See the Portugal, Spain and Italy posts for where winter works best.
March. The turn. Days lengthen fast, the Mediterranean reaches the 60s, and northern Europe is still in coats. Easter moves between late March and late April and is a domestic travel peak wherever it falls. Iceland's aurora season runs until early April (Iceland).
April–May. The first shoulder season. Highs in the 60s across northern and central Europe and the low 70s in the south, everything reopens, and crowds are moderate until late May. Tulip season in the Netherlands, the greenest weeks in Ireland, and the best time for city trips to Paris, Prague and Vienna before summer. Greek island ferries and seasonal flights start up through April and May (Greece).
June–August. Peak season: the warmest weather, the longest days, the biggest crowds and the highest transatlantic fares of the year. Rome and Athens average above 90°F in July, which is why southern city sightseeing is hard work in high summer. This is, however, the only reliable window for Scandinavia, Scotland and Iceland, where summer highs are in the 60s and 70s and the days are nearly endless (Norway). If you are tied to school holidays, the far north is where peak-season money buys the most.
September–early October. The second shoulder season and the strongest all-round window. Summer heat eases in the south while the sea is at its warmest, northern Europe is still mild, and European schools are back so crowds fall sharply after the first week of September. Wine harvest in France, Italy and Portugal; Oktoberfest in Munich runs from mid-September into early October (Germany); the Adriatic in Croatia is still swimmable.
Late October–November. Northern Europe turns grey and wet, with daylight down to nine or ten hours by late November. The Mediterranean holds up better: Lisbon, Seville and Athens are still in the 60s and 70s in October. The weeks between the end of October and US Thanksgiving are one of the quieter periods for transatlantic travel. Christmas markets open in the last week of November across Germany, Austria and the Czech Republic.
December. Two different months. The first three weeks are cold, festive and relatively quiet, with markets open and cities decorated. The Christmas–New Year fortnight is the second demand peak of the year after summer, for flights and hotels alike. Turkey and the Canary Islands are the mild-weather options.
Where to go, by month
- January–March: Lisbon, Seville, Rome, Athens and Istanbul for mild city breaks; the Alps for skiing; London and Paris for museums with no lines.
- April–May: Paris, Amsterdam, Prague, Vienna, the Loire and Tuscany; Ireland and the UK countryside; the Greek islands as they open.
- June–August: Norway's fjords, Sweden, Finland, Iceland, Scotland and the Baltic capitals; the Alps for hiking; the Atlantic coasts of France and Portugal rather than the baking interior.
- September–October: The Mediterranean coast and islands (Greece, Croatia, southern Italy, Spain), wine regions everywhere, Munich for Oktoberfest, and any big city.
- November–December: Christmas markets in Germany, Austria, Czech Republic and Alsace; Lisbon and Andalusia for winter sun; London and Paris in the run-up to Christmas.
How transatlantic fares move through the year
Wildly has live prices, not a historical archive, so this section is about demand, not measured averages. US–Europe demand has two peaks, mid-June through August and the Christmas–New Year fortnight, and two troughs, mid-January through early March and the weeks between Halloween and Thanksgiving. The two shoulder seasons sit in between, with late May and the first week of September closer to peak than the rest of their months because US and European school calendars both turn over then.
A few structural points that hold regardless of year:
- Seasonal nonstops track demand. Many US routes to secondary European cities (Dubrovnik, Split, Prague, Nice, Athens from some hubs) only operate in summer, so the nonstop is available precisely when fares are highest. Off-season you connect through a hub such as London, Paris, Amsterdam, Frankfurt or Lisbon, which is where the year-round competition is.
- Gateway hubs have the most competition. London, Paris, Dublin, Lisbon, Amsterdam and Reykjavik all have multiple US carriers plus the home airline, and Dublin and Lisbon in particular are used as connecting points onward into Europe.
- Book summer earlier than winter. Peak-season inventory on the busiest routes is constrained; off-season inventory is not.
Compare today's prices on a few gateways: JFK to Paris, LAX to London, Boston to Dublin, Chicago to Rome, Miami to Madrid and San Francisco to Barcelona. Then set a price alert with a target based on what the route page shows; Wildly checks the routes you track every day and emails you when the fare drops to your target. For which months are cheapest to fly in general, see best months to fly.
Entry requirements for US citizens
Most of continental Europe is in the Schengen Area, which US passport holders can visit visa-free for up to 90 days in any 180-day period, counted across all Schengen countries together (Wikivoyage, "Travelling around the Schengen Area"). The UK and Ireland are outside Schengen and have their own entry rules and their own clocks. Carry a passport valid beyond your planned departure, and confirm current requirements with the embassy of your first-entry country before you fly, since pre-travel authorization schemes are being introduced.
FAQ
What is the single best month to visit Europe? September, for most itineraries: warm in the south, mild in the north, sea at its warmest, crowds falling after the first week, and transatlantic demand past its summer peak. May is the spring equivalent.
What is the cheapest time to fly to Europe? Demand is lowest from mid-January to early March and from the end of October to the week before Thanksgiving, so that is when published fares are usually softest. Check the route page for your airport rather than relying on a rule, and set an alert.
Is summer ever the right choice? Yes, for Scandinavia, Iceland, Scotland and the Alps, where it is the only reliably warm season. For Rome, Athens and Seville, summer is the hardest time to sightsee.
Where is warm in Europe in winter? Nowhere is beach-warm on the mainland, but Lisbon, the Algarve, Andalusia, Sicily, Malta, Athens and Cyprus are mild (highs in the high 50s to mid-60s). The Canary Islands, politically Spain but off the African coast, are the genuine winter-sun option.
Do US citizens need a visa for Europe? Not for short visits. The Schengen 90-in-180 rule covers most of the continent; the UK and Ireland are separate. Check for any new pre-travel authorization requirement before you go.
Sources
- London climate (Met Office 1991–2020 normals, Heathrow, via Wikipedia)
- Paris climate (Météo-France 1991–2020 normals, Parc Montsouris, via Wikipedia)
- Rome climate (ISPRA/SCIA 1991–2020 normals, Rome Urbe, via Wikipedia)
- Lisbon climate (IPMA 1991–2020 normals, via Wikipedia)
- Athens climate (National Observatory of Athens 1991–2020 normals, via Wikipedia)
- Stockholm climate (SMHI 1991–2020 normals, via Wikipedia)
- Wikivoyage: Travelling around the Schengen Area