Singapore weather by month

In Singapore, the average share of the sky covered by clouds shows moderate seasonal variation over the course of the year.

The clearer part of the year begins around May 15 and lasts for 4.4 months, ending around September 25. The clearest month is July, when the sky is clear, mostly clear, or partly cloudy 31% of the time on average.

The cloudier part of the year begins around September 26 and lasts for 4.5 months, ending around February 8. The cloudiest month is December, when it is overcast or mostly cloudy 91% of the time.

This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.

Across the year, average wind speed in Singapore is typically light breeze, near 14 km/h, and varies moderately with the seasons.

The windier part of the year lasts 3.3 months, from around Dec 3 to Mar 11. The windiest month is January, averaging about 18 km/h (light breeze).

The calmer part of the year runs from around Mar 12 to Jun 18, with April the calmest month at about 10 km/h.

Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.

Singapore receives about 5.0 kWh/m² a day of solar energy — bright — and it stays remarkably steady, holding between 4.3 and 5.7 kWh/m² all year. For solar panels, output here is a flat line, not a seasonal wave.