January weather forecast
Sinaboi, Indonesia

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Weather in January

January, like December, is another tropical winter month in Sinaboi, Indonesia, with temperature in the range of an average high of 30.9°C (87.6°F) and an average low of 24.6°C (76.3°F).

Temperature

Sinaboi's January showcases an average high-temperature of a still hot 30.9°C (87.6°F), hardly distinct from December's 30.5°C (86.9°F). Sinaboi's average low-temperature in January is measured at a warm 24.6°C (76.3°F).

Heat index

During January, the heat index is estimated at an extremely hot 40°C (104°F). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
Always consider that heat index estimations are for light winds and places in the shade. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'feels like', ties air temperature with relative humidity to produce the perceived temperature sensation. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In January, the average relative humidity in Sinaboi, Indonesia, is 78%.

Rainfall

In Sinaboi, during January, the rain falls for 25.2 days and regularly aggregates up to 151mm (5.94") of precipitation. In Sinaboi, during the entire year, the rain falls for 276 days and collects up to 1334mm (52.52") of precipitation.

Snowfall

In Sinaboi, snow does not fall in January through August, October through December.

Daylight

In Sinaboi, Indonesia, the average length of the day in January is 12h and 1min.
On the first day of January, sunrise is at 06:19 and sunset at 18:19. On the last day of the month, sunrise is at 06:28 and sunset at 18:30 WIB.

Sunshine

In January, the average sunshine in Sinaboi is 8.1h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in Sinaboi, Indonesia. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index of 7 in January converts into the following recommendations:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Resources | Updated: Feb 19, 2024 | Published by: Weather Atlas

Frequently asked questions

How hot is it in Sinaboi in January?

The average high-temperature, in January, in Sinaboi, is 30.9°C (87.6°F), while the average low-temperature is 24.6°C (76.3°F). In January, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is estimated at 40°C (104°F).

What is the average humidity in January in Sinaboi?

The average relative humidity in January is 78%.

How much does it rain in Sinaboi in January?

In Sinaboi, in January, during 25.2 rainfall days, 151mm (5.94") of precipitation is typically accumulated.

When it does not snow in Sinaboi?

January through August, October through December are months without snowfall.

How many hours of daylight does Sinaboi have in January?

In January, the average day length is 12h and 1min.

When are sunrise and sunset in January in Sinaboi?

In January, on the first day of the month, sunrise is at 06:19 and sunset at 18:19. On the last day of the month, sunrise is at 06:28 and sunset at 18:30 WIB.

How long on average sun shines in January in Sinaboi?

The average sunshine duration in January in Sinaboi, Indonesia, is 8.1h.

What are the months with the highest UV index in Sinaboi?

January through December, with an average maximum UV index of 7, are months with the highest UV index in Sinaboi.

When is the lowest UV index in Sinaboi?

January through December, with an average maximum UV index of 7, are months with the lowest UV index in Sinaboi, Indonesia.

What is the UV index intensity in January in Sinaboi?

The average daily maximum UV index in January is 7. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in January
Sinaboi, Indonesia

Average temperature in January - Sinaboi, Indonesia
  • Average high temperature in January: 30.9°C

The warmest months (with the highest average high temperature) are April, May, August and October (32°C).
The month with the lowest average high temperature is December (30.5°C).

  • Average low temperature in January: 24.6°C

The month with the highest average low temperature is May (26.2°C).
The coldest months (with the lowest average low temperature) are January and February (24.6°C).

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Average pressure in January
Sinaboi, Indonesia

Average pressure in January - Sinaboi, Indonesia
  • Average pressure in January: 1010.4mbar

The month with the highest atmospheric pressure is January (1010.4mbar).
The month with the lowest atmospheric pressure is May (1008.7mbar).

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Average wind speed in January
Sinaboi, Indonesia

Average wind speed in January - Sinaboi, Indonesia
  • Average wind speed in January: 6.4km/h

The windiest months (with the highest average wind speed) are July and August (7.7km/h).
The calmest month (with the lowest average wind speed) is December (6.1km/h).

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Average humidity in January
Sinaboi, Indonesia

Average humidity in January - Sinaboi, Indonesia
  • Average humidity in January: 78%

The month with the highest relative humidity is December (79%).
The months with the lowest relative humidity are August and September (71%).

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Average rainfall in January
Sinaboi, Indonesia

Average rainfall in January - Sinaboi, Indonesia
  • Average rainfall in January: 151mm

The wettest month (with the highest rainfall) is December (198mm).
The driest month (with the least rainfall) is July (52mm).

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Average rainfall days in January
Sinaboi, Indonesia

Average rainfall days in January - Sinaboi, Indonesia
  • Average rainfall days in January: 25.2 days

The month with the highest number of rainy days is November (27.3 days).
The month with the least rainy days is June (16.8 days).

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Average snowfall in January
Sinaboi, Indonesia

Average snowfall in January - Sinaboi, Indonesia
  • Average snowfall in January: 0mm

The month with the highest snowfall is September (2mm).
The months with the least snowfall are January, February, March, April, May, June, July, August, October, November and December (0mm).

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Average snowfall days in January
Sinaboi, Indonesia

Average snowfall days in January - Sinaboi, Indonesia
  • Average snowfall days in January: 0 days

The month with the highest number of snowfall days is September (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, October, November and December (0 days).

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Average daylight in January /
Average sunshine in January
Sinaboi, Indonesia

Average daylight in January / Average sunshine in January - Sinaboi, Indonesia
  • Average daylight in January: 12h and 0min

The month with the longest days is June (Average daylight: 12h and 12min).
The month with the shortest days is December (Average daylight: 12h and 0min).

  • Average sunshine in January: 8h and 1min

The months with the most sunshine are June and July (Average sunshine: 9h and 0min).
The month with the least sunshine is December (Average sunshine: 7h and 36min).

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Average sunshine days in January
Sinaboi, Indonesia

Average sunshine days in January - Sinaboi, Indonesia
  • Average sunshine days in January: 5 days

The month with the most sunshine days is June (11.3 days).
The month with the least sunshine days is November (2.4 days).

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Average UV index in January
Sinaboi, Indonesia

Average UV index in January - Sinaboi, Indonesia
  • Average UV index in January: 7

The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).

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Average cloud cover in January
Sinaboi, Indonesia

Average cloud cover in January - Sinaboi, Indonesia
  • Average cloud cover in January: 44

The month with the most cloud cover is November (Cloud cover 50).
The months with the least cloud cover are June and July (Cloud cover 32).

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Average visibility in January
Sinaboi, Indonesia

Average visibility in January - Sinaboi, Indonesia
  • Average visibility in January: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and December (10km).
The month with the lowest visibility is November (9km).

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Sinaboi, Indonesia

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