January weather forecast
Cayenne, French Guiana

Following the virtue of being the initial month of the year, January in Cayenne, French Guiana, manifests the onset of the wet season. Precipitation rates are high as the atmosphere fills with thunderstorms and steady showers. However, the weather avoids remaining monotonously rainy as the sun reveals itself for some hours per day. Beachgoers and swimmers still find delight in the sea, thanks to its warmth despite the frequent rain. Significantly, rainfall reaches 451mm (17.76") in January, highlighting its robust beginning to the year's wet season.

Temperature

Cayenne's temperature records reveal January as the coldest month, marked by average highs of 29.1°C (84.4°F) and lows of 23.3°C (73.9°F).

Rainfall

In Cayenne, French Guiana, in January, it is raining for 23.6 days, with typically 451mm (17.76") of accumulated precipitation. In Cayenne, during the entire year, the rain falls for 221.1 days and collects up to 3516mm (138.43") of precipitation.

Sea temperature

In January, the average sea temperature in Cayenne is 27.6°C (81.7°F).
Note: Water temperatures between 25°C (77°F) and 29°C (84.2°F) are regarded as highly pleasant, making all water activities enjoyable without any discomfort over long durations.

Daylight

In January, the average length of the day is 11h and 52min.
On the first day of January, sunrise is at 06:37 and sunset at 18:28. On the last day of the month, sunrise is at 06:45 and sunset at 18:40 -03.

Sunshine

The month with the least sunshine is January, with an average of 3h of sunshine.

UV index

January through June, August through November, with an average maximum UV index of 12, are months with the highest UV index in Cayenne. A UV Index estimate of 11, and higher, represents an excessive health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: In January, the maximum UV index of 12 transforms into these recommendations:
Utilize all necessary safety measures, unprotected skin could suffer burns instantly. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Experience reduced UV exposure by about half when donning a wide-brim hat. Applying and reapplying a broad-spectrum sunscreen with a minimum SPF 30 after every two hours, outdoor workout, or swim is recommended. Watch out! Reflections from sand and water can surge UV radiation exposure.