Liberia weather by month

In Monrovia, 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 November 4 and lasts for 5.1 months, ending around April 7. The clearest month is January, when the sky is clear, mostly clear, or partly cloudy 65% of the time on average.

The cloudier part of the year begins around April 8 and lasts for 6.9 months, ending around November 3. The cloudiest month is August, when it is overcast or mostly cloudy 95% 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 Monrovia is typically calm, near 8 km/h, and varies moderately with the seasons.

The windier part of the year lasts 3.8 months, from around Jun 7 to Sep 29. The windiest month is August, averaging about 12 km/h (light breeze).

The calmer part of the year runs from around Sep 30 to Jun 6, with December the calmest month at about 6 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.

Monrovia receives about 4.7 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 3.9 and 5.5 kWh/m².

The brighter stretch of the year lasts 5.2 months, from around Dec 15 to May 22. The brightest month is March, averaging about 5.4 kWh/m² (bright).

The dimmest month is August, down near 3.9 kWh/m² — roughly 28% less than the March peak.