Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
January
Weather in January
Temperature
The yearly lowest temperatures occur in January, February and July, averaging a high-temperature of 30.1°C (86.2°F).Heat index
The heat index in January is calculated to be a torrid 37°C (98.6°F). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.When referencing the heat index, its values are suitable for shady environments and light breezes. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.
Humidity
In Sidoarjo, Indonesia, the average relative humidity in January is 78%.Rainfall
In Sidoarjo, in January, it is raining for 27 days, with typically 172mm (6.77") of accumulated precipitation. Throughout the year, in Sidoarjo, there are 188.4 rainfall days, and 840mm (33.07") of precipitation is accumulated.Daylight
The average length of the day in January is 12h and 30min.On the first day of January, sunrise is at 05:15 and sunset at 17:48. On the last day of the month, sunrise is at 05:29 and sunset at 17:55 WIB.
Sunshine
With an average of 8.1h of sunshine, January has the least sunshine of the year in Sidoarjo.UV index
The months with the highest UV index are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In January, a regular UV index of 7 translates into these guidelines:
Guard against overexposure. Protection from sun-induced harm is essential. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
How hot does it get in January?
What is the average humidity in January?
How many days does it rain in January?
How many hours of daylight does Sidoarjo have in January?
When is the sunrise / sunset in January?
What is the month with the least sunshine?
How many hours of sunshine does Sidoarjo have in January?
What are the months with the highest UV index?
What is the month with the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Sidoarjo, Indonesia
- Average high temperature in January: 30.1°C
The warmest month (with the highest average high temperature) is October (32.9°C).
The months with the lowest average high temperature are January, February and July (30.1°C).
- Average low temperature in January: 25.3°C
The month with the highest average low temperature is November (26.5°C).
The coldest month (with the lowest average low temperature) is August (24.2°C).
Average pressure in January
Sidoarjo, Indonesia
- Average pressure in January: 1009mbar
The month with the highest atmospheric pressure is August (1011.4mbar).
The month with the lowest atmospheric pressure is December (1008.7mbar).
Average wind speed in January
Sidoarjo, Indonesia
- Average wind speed in January: 9.6km/h
The windiest month (with the highest average wind speed) is August (9.9km/h).
The calmest month (with the lowest average wind speed) is April (6.3km/h).
Average humidity in January
Sidoarjo, Indonesia
- Average humidity in January: 78%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is October (63%).
Average rainfall in January
Sidoarjo, Indonesia
- Average rainfall in January: 172mm
The wettest month (with the highest rainfall) is February (179mm).
The driest month (with the least rainfall) is August (4mm).
Average rainfall days in January
Sidoarjo, Indonesia
- Average rainfall days in January: 27 days
The month with the highest number of rainy days is January (27 days).
The month with the least rainy days is August (3.7 days).
Average daylight in January /
Average sunshine in January
Sidoarjo, Indonesia
- Average daylight in January: 12h and 3min
The month with the longest days is December (Average daylight: 12h and 30min).
The month with the shortest days is June (Average daylight: 11h and 42min).
- Average sunshine in January: 8h and 1min
The months with the most sunshine are August, September and October (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 8h and 6min).
Average sunshine days in January
Sidoarjo, Indonesia
- Average sunshine days in January: 3.1 days
The month with the most sunshine days is August (26 days).
The month with the least sunshine days is February (2.8 days).
Average UV index in January
Sidoarjo, 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).
Average cloud cover in January
Sidoarjo, Indonesia
- Average cloud cover in January: 44
The month with the most cloud cover is January (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 11).
Average visibility in January
Sidoarjo, Indonesia
- Average visibility in January: 9km
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January and February (9km).
