Singapore is a city-state located in Southeast Asia, consisting of a small group of islands just off the southern tip of the Malaysian peninsula. Highly urbanized and densely populated as it is, very little is left of its original tropical rainforest. So if you want to go for a hike, possibilities are limited to day-hikes in one of the remaining nature reserves and parks of Singapore.
First and foremost is the small Bukit Timah Nature Reserve, home to Singapore's highest hill, Bukit Timah Hill (163 m! Some Singapore skyscrapers are higher...), and to a few of the last remaining pockets of primary lowland dipterocarp forest in Singapore. The much larger Central Catchment Nature Reserve is right next to it, and contains Singapore's main fresh water reservoirs. All primary forests here were cleared in the past, so it is now mostly covered in secondary and virgin forests. Hiking trails of varying lengths have been set out in both reserves, leading along well constructed and equally well maintained paths, including stairways, boardwalks and a suspension bridge through the forest canopy. Lots of plants and animals along the way, including long-tailed macaques and amazing butterflies.
On the southcoast you can hike in the Labrador Nature Reserve along the Labrador Nature & Coastal Walk, through the Berlayer Creek mangroves and along the small hill of Bukit Chermin. Or follow trails in the Sungei Buloh Wetland Reserve in the northwest to spot mudskippers and water snakes. From Changi Point Ferry Terminal you can catch a boat to the island of Pulau Ubin and take a pleasant 2 hour walk along the Pulau Ubin Tree Trail.
Singapore has a hot tropical rainforest climate with yearround high humidity and frequent rainfall. November and December are wettest, April and May are hottest.