Situated 1 degree north of the Equator, Singapore doesn't have distinct seasons. Its climate is tropical (warm but humid), and afternoon thunderstorms are a frequent occurrence. As a result, it's a good place to visit any time of year but if possible try base your visit around 1 of the many festivals and events:
Thaipusam, February: a Hindu festival during which people pray, fast and mortificate their flesh to prove their religious devotion.
Singapore Fringe Festival, February: 2 weeks of music, theatre, dance and art exhibitions, with events running concurrently at the Arts Museum.
Singapore Arts Festival, May-June: a month-long annual event, displaying contemporary arts with an Asian influence, and amazing dance displays.
Singapore Food Festival, July: a month-long celebration of the country's best dishes.
The Great Sale, June & July: an 8-week shopathon around the city, with discounts of up to 70% in the department stores.
National days (exact dates may vary):
1 Jan: New Year's Day
1 Feb: Thaipusam
18-19 Feb: Chinese New Year
6 April: Good Friday
1 May: Labour Day
31 May: Vesak Day
9 Aug: National Independence Day
13 Oct: Hari Raya Puasa
8 Nov: Deepavali
20 Dec: Hari Raya Haji
25 Dec: Christmas Day
For more generic info try visitsingapore.com, or for a listing of current events try AngloInfo.
NB, please do not rely solely on this information for your travel planning.
From the UK: carriers include Singapore Airlines, British Airways and Qantas.
From Europe: try Singapore Airlines, Air France,
Lufthansa, Swiss International Airlines and KLM.
From the USA: with Singapore Airlines and Northwest Airlines.
FROM THE AIRPORT: Most visitors will take the Mass Rapid Transit (MRT) metro network, which takes you straight to City Hall Station in half an hour with a cross-platform change at Tanah Merah Station. Alternatively, you can take an airport bus or a taxi.
Consider buying a Singapore Tourist Pass which covers all public transport for your chosen duration.
BY METRO: Singapore has an efficient and inexpensive metro called MRT, which is an easy way to get around the city and has a Smartcard ticketing system.
BY BUS: Buses are usually air-conditioned, but be prepared to wait in the heat and humidity, and remember they get very busy in the rush hours. You must also have the exact change.
BY TAXI: Taxis are plentiful, cheap and safe.
BY BICYCLE: Dockless bikes are widely available - you can pick one up, cycle around and drop it where you like, paying through the relevant company app.