Macao weather by month

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

The clearer part of the year begins around September 5 and lasts for 5.1 months, ending around February 6. The clearest month is October, when the sky is clear, mostly clear, or partly cloudy 69% of the time on average.

The cloudier part of the year begins around February 7 and lasts for 6.9 months, ending around September 4. The cloudiest month is June, when it is overcast or mostly cloudy 81% 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 Macau is typically light breeze, near 15 km/h, and varies little with the seasons.

The windier part of the year lasts 5.6 months, from around Oct 26 to Apr 12. The windiest month is December, averaging about 16 km/h (light breeze).

The calmer part of the year runs from around Jul 25 to Oct 25, with August the calmest month at about 13 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.

Macau receives about 4.4 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 3.3 and 5.6 kWh/m².

The brighter stretch of the year lasts 6.8 months, from around Apr 6 to Oct 30. The brightest month is July, averaging about 5.5 kWh/m² (bright).

The dimmest month is January, down near 3.4 kWh/m² — roughly 38% less than the July peak.