Temperatures in January
It's hot in January in Sumatra with an average temperature of 31°C. Temperatures this month range from a low of 30°C to a high of 32°C. At night, you can expect temperatures between 23°C and 24°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Sumatra in January. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of January
The month of January starts in Sumatra with hot temperatures, averaging around 32°C during the day and nights close to 24°C. Plenty of days with a chance of precipitation. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
Mid-January
By mid-January, the average daytime temperature drops to around 31°C, with nights close to 24°C. The chance of precipitation is high during this period. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
End of January
By the end of January, the average daytime temperature in Sumatra will be around 31°C, with nights close to 24°C. There’s a significant chance of many days with precipitation. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
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Precipitation in January
In January, there is an average of 237 mm of precipitation, spread over 21 days. The wind speed is around 2 Bft, mostly coming from the South.
The average precipitation chance this month is 69% per day. Though that seems frequent, there are also a few days with lower precipitation chances.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in January for Sumatra. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Sumatra in January |
UK | ||
|---|---|---|---|
 Average Temperature |
31°C | 8°C | |
 High Temp |
32°C | 9°C | |
| Low Temp |
30°C | 6°C | |
 Total Precipitation |
237 mm | 58 mm | |
| Rainy Days |
21 days | 9 days | |
December
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is January a good time to visit Sumatra?
After some sun? Then January isn’t the best time to be in Sumatra. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Sumatra in January
With 35°C, Sumatra hit the highest temperature in the last 10 years in January 2017. The lowest daytime temperature in this month was 25°C in 2023. The extreme night temperatures ranged from a low of 20°C to a high of 26°C.
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Daily Temperature in January in Sumatra
This chart shows the average daily temperatures, both day and night, for each day in January in Sumatra, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in January in Sumatra
The chart below shows the average daily precipitation in January for Sumatra, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for January, you can expect around 21 days of rain in Sumatra.
Daily UV Index in January in Sumatra
This chart shows the average daily UV index in January in Sumatra, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in January in Sumatra Over the Years
This chart shows the average temperature in January in Sumatra, measured in degrees Celsius, over the past years.
Total Precipitation in January in Sumatra Over the Years
This chart shows the average precipitation in January in Sumatra, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in January for Sumatra
Click on a specific day in January for detailed info on the typical weather on that day in Sumatra. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in January in Sumatra
Have you been to Sumatra in January?
Share your weather experience in January in Sumatra.
Average Weather in Sumatra by Month
Click on a month below to see detailed weather info for Sumatra. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
