Singapore today: Cloudy start, Woodlands rain at midday, 31°C high

90% rain chance at 09:00; Woodlands rain at 12:00

At 06:00, Central, Changi, Jurong West, Sengkang and Woodlands are all forecast to be cloudy with a 10% chance of rain. At 09:00 the chance rises to 90% in all five areas, though hourly rainfall is forecast at 0.0 mm.

Woodlands has the only rain in the hourly forecast: 1.0 mm at 12:00 and 1.0 mm at 15:00, each with a 90% chance, within a daily total of 4 mm. At 18:00 the chance falls to 10% with sunny skies.

At 12:00, Central, Jurong West and Sengkang are cloudy with a 90% chance and 0.0 mm, while Changi is sunny with a 10% chance. An umbrella is an optional precaution.

Highs of 30-31°C; severe heatstroke caution in four areas

Daily highs are forecast at 31°C in Central, Jurong West, Sengkang and Woodlands and 30°C in Changi, with lows of 26°C in Central, Changi, Jurong West and Woodlands and 27°C in Sengkang. Temperatures at 06:00 range from 26°C to 27°C.

The heatstroke index (WBGT) is at severe caution in Central, Jurong West, Sengkang and Woodlands, and at caution in Changi. The activity index is poor in Central, Jurong West, Sengkang and Woodlands and slightly poor in Changi.

Central is forecast at 31°C at 12:00 and 15:00, then 29°C at 18:00.

Moderately polluted air; driving index excellent to good

The daily air quality category is moderately polluted in Central, Changi, Jurong West, Sengkang and Woodlands. At 09:00 the hourly reading is lightly polluted in all five areas, and at 18:00 it is lightly polluted again.

At 12:00, air quality is moderately polluted in Central, Changi, Sengkang and Woodlands, while Jurong West is lightly polluted. At 15:00 it is moderately polluted in all five areas.

The driving index is excellent in Central, Changi, Jurong West and Sengkang, and good in Woodlands.