VacationSelector
Titanic Belfast, Belfast
BelfastTitanic Belfast
The cathedral facade, Siena
SienaThe cathedral facade

Photos: Belfast by Nico Kaiser, CC BY 2.0, cropped; Siena by Raimond Spekking, CC BY-SA 4.0, cropped.

Belfast or Siena?

Our verdict in twelve categories, each scored against the same fixed benchmark cities, and the climate month by month, so you can choose for your trip.

Choose Belfast for

  • nightlife
  • families
  • live music and the arts

What lies behind each score is written up on Belfast’s own page.

Choose Siena for

  • wellness
  • day trips
  • culture and sights

What lies behind each score is written up on Siena’s own page.

Scoreboard

Twelve categories on one fixed scale from 0 to 100. The shaded stretch is the gap between the two.

Beaches & swimming. Belfast 20, Siena 14: Belfast leads by 6 points.
Food & drink. Belfast 50, Siena 62: Siena leads by 12 points.
Culture & sights. Belfast 55, Siena 78: Siena leads by 23 points.
Nightlife. Belfast 50, Siena 27: Belfast leads by 23 points.
Nature & outdoors. Belfast 74, Siena 65: Belfast leads by 9 points.
Day trips. Belfast 66, Siena 94: Siena leads by 28 points.
Good for families. Belfast 58, Siena 38: Belfast leads by 20 points.
Getting around. Belfast 62, Siena 60: Belfast leads by 2 points.
Shopping & style. Belfast 45, Siena 35: Belfast leads by 10 points.
Affordability. Belfast 48, Siena 42: Belfast leads by 6 points.
Live music & performing arts. Belfast 55, Siena 36: Belfast leads by 19 points.
Wellness & relaxation. Belfast 25, Siena 55: Siena leads by 30 points.
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What lies behind each score is written up on the two cities’ own pages: Belfast and Siena.

Your match

Pick a travel style or drag the sliders, and both match scores follow your weighting.

Too close to call, level with your weighting

Belfast
51match

Wins on nightlife and families with your weighting.

Siena
51match

Wins on wellness and day trips with your weighting.

What matters to you?

When should you go?

Pick your month. The climate figures are measured averages, not a forecast.

Belfast in July

19 °Cdaytime high
12 °Cnight-time low
74 mmrain in the month
5 hsunshine a day
12 °Csea
17 hdaylight a day

Siena in July

31 °Cdaytime high
17 °Cnight-time low
27 mmrain in the month
No recordsunshine a day
No seasea
15 hdaylight a day

Daytime high, °C

0°10°20°30°40°JFMAMJJASOND

Rainfall in the month, mm

050100150JFMAMJJASOND
BelfastSiena

Where the figures come from

Siena's temperatures are measured 45 km from the centre, at Arezzo.

Siena has no rain gauge within 25 km of the centre, so its rainfall comes from a gridded climate dataset read at the city rather than from a gauge further away.

Temperature and rainfall are climate normals, averaged over the years shown. Belfast: 1991-2020 normals, Belfast / Aldergrove Airport (19.4 km from centre). Siena: 2006-2017 (rainfall 1991-2020) normals, Arezzo (45 km from centre).

Before you go

MeasureBelfastSiena
Official languageEnglishItalian
CurrencyPound Sterling (GBP)Euro (EUR)
SocketsG230 V, 50 HzCFL230 V, 50 Hz
Driving sideLeftRight
Time zoneUTC, UTC+1 in summerUTC+1, UTC+2 in summer
Emergency number112 or 999112
Elevation3 m322 m
Main airportGeorge Best Belfast City Airport (BHD)4 km from centre25 non-stop destinationsFlorence Airport, Peretola (FLR)55 km from centre46 non-stop destinations
Public holidays this year10 days13 days

By the numbers

MeasureBelfastSiena
City population345,00652,812
People per km²3,000446
Museums within 10 km830
UNESCO World Heritage sites within 50 km15
Swim season, months above 21 °CNone-

Where else could you go?

Every comparison below shares a destination with this one, so you can follow Belfast or Siena somewhere new.

Browse every destination

Sources

Structured data from Wikidata (CC0). Weather data by Meteostat. Meteorological data provided by NOAA, DWD and others. Rainfall where no rain gauge is within 25 km is from the TerraClimate 1991-2020 climatology (Abatzoglou et al. 2018, Scientific Data), read at the city. Sea surface temperature from NOAA OISST v2.1, NOAA Physical Sciences Laboratory. Airport data from OurAirports (public domain). Public holidays from Nager.Date (MIT). Exchange rates via Frankfurter, based on European Central Bank reference rates. Non-stop route lists from the "Airlines and destinations" tables on English Wikipedia airport articles, by Wikipedia contributors, reused under CC BY-SA 4.0. Currency from the ISO 4217 register maintained by SIX, cross-checked against country data from GeoNames (CC BY 4.0). Price level from World Bank open data (PPP conversion factor for private consumption and official exchange rate), CC BY 4.0. Time zones from GeoNames (CC BY 4.0); clock offsets computed from the IANA time zone database. Tourism statistics from Eurostat, © European Union, reused under CC BY 4.0. Daylight hours computed from each destination's latitude using the NOAA solar position algorithm.

Category scores are our editorial verdict under rubric v3, each placed against the same fixed benchmark cities; the climate figures are measured. How the scores are set. Snapshot generated 2026-10-31. Daily budgets are estimates from country price levels.