North Sumatra Weather in January

Average temperatures, rainfall, sunshine and the best places to visit in North Sumatra, Indonesia in January.

Planning a getaway to North Sumatra, Indonesia this January and curious about the weather you should prepare for? Discover all the vital details you need on this page, solving your puzzle:

What to Expect in North Sumatra in January

North Sumatra, Indonesia is a region in Indonesia. January in North Sumatra generally has temperatures that range from warm to very warm, with heavy precipitation.

Temperatures

During the day temperatures vary from warm in Tuk Tuk at 26°C (79°F) to very warm in Medan at 32°C (90°F). At night it cools down to 23°C (73°F) in Medan and 19°C (66°F) in Tuk Tuk. These night and day temperatures are average and some days may be even warmer. So be prepared and dress for the heat.

For a closer look at conditions across North Sumatra, Indonesia, refer to the map below.

Precipitation

In January, precipitation varies across different areas. From heavy rainfall in Timbanglawang with an average of 189 mm (7.4 in) to heavy rainfall in Pematangsiantar with 234 mm (9.2 in).

Average sunshine

Sunshine is moderately available across various locations. In Medan, you can expect around 127 hours of sunlight in January, which gives a pleasant combination of sun and shade. For those who want maximum sunshine, our weather planner can point you toward the sunniest places on Earth.

Explore North Sumatra by month

Best Places to Visit in North Sumatra in January

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across North Sumatra.

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in North Sumatra

What is the weather like in January for some of the most popular destinations in North Sumatra, Indonesia?

Temperature range in North Sumatra (January)

Precipitation variation in North Sumatra (January)

Medan

In January Medan generally has very high temperatures with maximum daytime temperatures around 32°C (90°F), minimum nighttime temperatures around 23°C (73°F) and heavy monthly rainfall. So on average the conditions are poor that month.

December
January
February
Max temperature
31°C (88°F)
32°C (90°F)
32°C (90°F)
Min temperature
23°C (73°F)
23°C (73°F)
23°C (73°F)
Monthly sun hours
98 hours
127 hours
142 hours
Monthly rainfall
334 mm (13 in)
221 mm (8.7 in)
177 mm (7 in)
Monthly rainy days
15 days
11 days
7 days
Weather conditions

Rantauprapat

In January Rantauprapat generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 23°C (73°F) and heavy monthly rainfall. So on average the conditions are poor that month.

December
January
February
Max temperature
31°C (88°F)
31°C (88°F)
32°C (90°F)
Min temperature
23°C (73°F)
23°C (73°F)
23°C (73°F)
Monthly rainfall
314 mm (12 in)
226 mm (8.9 in)
196 mm (7.7 in)
Monthly rainy days
18 days
14 days
12 days
Weather conditions

Tuk Tuk

In January Tuk Tuk generally has high temperatures with maximum daytime temperatures around 26°C (79°F), minimum nighttime temperatures around 19°C (66°F) and heavy monthly rainfall. So on average the conditions are tolerable that month.

December
January
February
Max temperature
26°C (79°F)
26°C (79°F)
27°C (81°F)
Min temperature
19°C (66°F)
19°C (66°F)
19°C (66°F)
Monthly rainfall
274 mm (11 in)
199 mm (7.8 in)
171 mm (6.7 in)
Monthly rainy days
18 days
14 days
11 days
Weather conditions

Berastagi

In January Berastagi generally has high temperatures with maximum daytime temperatures around 27°C (81°F), minimum nighttime temperatures around 18°C (64°F) and heavy monthly rainfall. So on average the conditions are unpleasant that month.

December
January
February
Max temperature
26°C (79°F)
27°C (81°F)
27°C (81°F)
Min temperature
18°C (64°F)
18°C (64°F)
18°C (64°F)
Monthly sun hours
98 hours
127 hours
142 hours
Monthly rainfall
337 mm (13 in)
233 mm (9.2 in)
212 mm (8.3 in)
Monthly rainy days
18 days
13 days
10 days
Weather conditions

Parapat

In January Parapat generally has high temperatures with maximum daytime temperatures around 27°C (81°F), minimum nighttime temperatures around 19°C (66°F) and heavy monthly rainfall. So on average the conditions are unpleasant that month.

December
January
February
Max temperature
26°C (79°F)
27°C (81°F)
27°C (81°F)
Min temperature
20°C (68°F)
19°C (66°F)
20°C (68°F)
Monthly rainfall
295 mm (12 in)
218 mm (8.6 in)
189 mm (7.4 in)
Monthly rainy days
19 days
14 days
11 days
Weather conditions

Is your destination not in the list? Have a look at all destinations in North Sumatra, in Indonesia.

In our records: Indonesia January extremes

Notable January records observed across cities in Indonesia in our climate database (1976 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • From our sources, the wettest January day in Indonesia brought 389 mm (15 in) in Manado on January 27, 2023.

Popular cities in January

Day & night temperatures, rainfall and average weather in North Sumatra in January.

City Weather Day temp Night temp Rainfall
Medan 32°C (90°F) 23°C (73°F) 221 mm (8.7 in)
Rantauprapat 31°C (88°F) 23°C (73°F) 226 mm (8.9 in)
Tuk Tuk 26°C (79°F) 19°C (66°F) 199 mm (7.8 in)
Berastagi 27°C (81°F) 18°C (64°F) 233 mm (9.2 in)
Parapat 27°C (81°F) 19°C (66°F) 218 mm (8.6 in)
Pematangsiantar 29°C (84°F) 21°C (70°F) 234 mm (9.2 in)

North Sumatra weather in January: frequently asked questions

What is the weather like in North Sumatra, Indonesia in January?

North Sumatra, Indonesia typically experiences poor weather in January, part of the season. Daytime highs in Medan average around 32°C (90°F), and temperatures drop to about 23°C (73°F) at night.

What is the average temperature in North Sumatra, Indonesia in January?

Medan averages a daytime maximum of 32°C (90°F) in January, with overnight lows close to 23°C (73°F).

Does North Sumatra, Indonesia get a lot of rain in January?

Rainfall in North Sumatra, Indonesia peaks during January. Medan averages roughly 221 mm (8.7 in), so frequent and sometimes heavy showers are the norm.

Is January a Good Time to Visit North Sumatra, Indonesia?

In our opinion, January may not be the ideal time to visit North Sumatra, Indonesia due to the typically poor weather in Medan.

Generally speaking, February provides unpleasant weather in Medan.

Interested in more climate information?

We have much more information about the climate in North Sumatra.

Weather and climate has detailed information for every country in the world. Are you going to Indonesia? Get detailed historical weather averages for many cities in Indonesia.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.