Weather in Sumatra, Indonesia in January

So you're interested in going to Sumatra, Indonesia in January

January is a hot and rainy time for sunbathing in Sumatra. January is an excellent month for swimming in Sumatra with very warm sea temperatures. Consider visiting Sumatra in the months of February, March, August, September, for the best beach weather. Also consider one of our other suggestions for January.

Temperature in Sumatra in January

The average maximum temperature in Sumatra in January is 29°. The average maximum temperature is 30° in the previous month and 30° in the next month.

The average temperature in Sumatra in January is 27°. The average temperature ranges is 27° in the previous month and 27° in the next month.

The average minimum temperature in Sumatra in January is 23°. The minimum temperature is 23° in the previous month and 23° in the next month.

Sunshine in Sumatra in January

The average day light hours per day in Sumatra in January are 12.3 and there are 6.9 hours of sunshine per day on average during January making it a quite sunny month with some cloud cover.

The ultraviolet index in Sumatra in January is typically 14.3 during January. An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in Sumatra in January

The average sea water temperature in Sumatra in January is 28.1° which is very warm and ideal for relaxing and swimming for the whole day.

Rainfall in Sumatra in January

The average total rainfall in Sumatra in January is 9.9cm and on average there are 16.5 rainy days in January making it a wet time to visit the beach.

Humidity in Sumatra in January

The maximum dew point (an indicator of humidity) in Sumatra in January is 24° which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning. The dew point is 25° in the previous month and 24° in the next month.

The average maximum relative humidity in Sumatra in January is typically 93.1%. The maximum relative humidity is 97% in the previous month and 94.3% in the next month.

The average relative humidity in Sumatra in January is typically 81.9%. The average relative humidity is 87.6% in the previous month and 80.6% in the next month.

Wind Speed in Sumatra in January

The average maximum wind speed in Sumatra in January is typically 24kmh. The average maximum wind speed is 20kmh in the previous month and 25kmh in the next month.

The average wind speed in Sumatra in January is typically 11kmh. The average wind speed is 6kmh in the previous month and 9kmh in the next month.

The average wind direction in Sumatra in January is from the North.

Monthly Averages

Suggested Beaches in January

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