Grenada weather by month

In Saint George's, 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 25 and lasts for 4.3 months, ending around April 5. The clearest month is January, when the sky is clear, mostly clear, or partly cloudy 85% of the time on average.

The cloudier part of the year begins around August 1 and lasts for 3.8 months, ending around November 24. The cloudiest month is October, when it is overcast or mostly cloudy 56% 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 Saint George's is typically breezy, near 26 km/h, and varies moderately with the seasons.

The windier part of the year lasts 7.2 months, from around Dec 5 to Jul 11. The windiest month is February, averaging about 29 km/h (breezy).

The calmer part of the year runs from around Jul 12 to Dec 4, with September the calmest month at about 21 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.

Saint George's receives about 5.8 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 4.9 and 6.6 kWh/m².

The brighter stretch of the year lasts 7.3 months, from around Feb 11 to Sep 19. The brightest month is April, averaging about 6.5 kWh/m² (intense).

The dimmest month is November, down near 5.0 kWh/m² — roughly 24% less than the April peak.