Nauru weather by month

In Yaren, 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 6 and lasts for 6.8 months, ending around November 29. The clearest month is September, when the sky is clear, mostly clear, or partly cloudy 58% of the time on average.

The cloudier part of the year begins around November 30 and lasts for 5.2 months, ending around May 5. The cloudiest month is January, when it is overcast or mostly cloudy 68% 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 Yaren is typically light breeze, near 16 km/h, and varies little with the seasons.

The windier part of the year lasts 4.9 months, from around Dec 1 to Apr 28. The windiest month is February, averaging about 18 km/h (light breeze).

The calmer part of the year runs from around Apr 29 to Nov 30, with July the calmest month at about 14 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.

Yaren receives about 5.9 kWh/m² a day of solar energy — bright — and it stays remarkably steady, holding between 5.5 and 6.4 kWh/m² all year. For solar panels, output here is a flat line, not a seasonal wave.