Georgetown month by month, at a glance
Hover each month for the summary. Click to pin it.
Temperature decides nothing here. There is less than two degrees between the coolest and warmest months on average, and the whole year moves between around 21 at night and around 33 by day. What changes the trip is water.
01 Two dry seasons, not one
Most tropical destinations have one dry block and one wet one. Georgetown has two of each. The heavy rain arrives from May to July and returns in December and January; in between there are two dry windows of different lengths.
The first runs February to April, with March the driest month of the year: 113.7 millimetres over eleven rainy days. The second is shorter and runs September to October, with 149.5 and 135 millimetres respectively.
The gap with the wet season is huge. June, the wettest month, gathers 357.5 millimetres; more than three times March. And July, with 297.8 millimetres, spreads them over twenty-three days: it rains practically every day.
Key moments at a glance
113.7 mm over eleven days and nearly 200 hours of sun.
135 mm over just ten rainy days, with plenty of sun and plenty of heat.
357.5 mm and 139 hours of sun, the year's minimum.
Twenty-three rainy days out of thirty-one.
02 The two windows are not the same
February and March are the coolest at night: minima drop to 21.1 and 21.4 degrees, which in a climate like this you notice when sleeping and when walking early.
September and October, by contrast, are the hottest months of the year, with highs of 33 degrees, and — along with August, which reaches 218.7 hours — the sunniest. Long, clear days, but heavy at midday.
If you plan to walk a lot around the centre, the first window is more comfortable. If light matters to you for photographing the timber architecture, the second is better: more hours of sun and less closed sky.
03 How it actually rains here
Even in the wet months, rain rarely lasts all day. It usually arrives in intense, fairly short downpours, with the sky clearing afterwards. The problem is not being stuck indoors: it is what happens in the street meanwhile.
The city lies below the level of high tide and drains by gravity, so a heavy shower that coincides with high tide leaves water on roads and pavements for a few hours, until the gates can open.
That asks for two simple things: footwear you can afford to get wet, and not hanging the day's plan on a single time slot. In the rainy season it is worth always having an indoor alternative.
Do not pick a month by temperature: it is always the same heat here. Pick it by rainy days.
04 If you are heading inland
Almost everyone who reaches the city also makes a trip into the interior, and much of that travel is by light aircraft. In the dry months there are more days of predictable flying and fewer weather cancellations.
On the other hand, the country's great waterfalls run with far more volume at the end of the rainy season. It is the classic trade-off: more spectacle with more risk of the day closing in, or less volume with better odds.
If you had to keep only one recommendation: March for the greatest number of dry days and cool nights; October if you prefer light and are not put off by heat.
05 In short
Go between February and April or between September and October. Avoid May to July and the December–January block. And do not expect the seasons to show on the thermometer: here the season is measured in millimetres.
