January weather forecastJava, São Tomé and Príncipe
January
Weather in January
January ushers in the new year with humid weather in Java, São Tomé and Príncipe. This month sees a high relative humidity of 77%, making it a challenging time for those not accustomed to tropical weather. The weather also has the tendency to be windy, with wind speeds reaching as high as 11.7km/h (7.3mph). The frequent rains contribute to the high humidity levels and promote a lush green landscape. The climate in January is similar to that of the preceding month, but is slightly drier.Temperature
Java, São Tomé and Príncipe, records an average high-temperature of a still warm 28°C (82.4°F) in January, closely mirroring the climate of the previous month. Java observes a consistent average low-temperature of 27°C (80.6°F) throughout January nights.Heat index
In January, the heat index is evaluated at a hot 32°C (89.6°F). Exhaustion might be the outcome of enduring exposure and continuous activity, with a risk of heat cramps.Consider that heat index readings are for situations in the shade and light wind. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', offers an insight into how hot it feels when we factor in moisture content. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Humidity
In Java, the average relative humidity in January is 77%.Rainfall
In Java, during January, the rain falls for 27.1 days and regularly aggregates up to 130mm (5.12") of precipitation. Throughout the year, there are 241.7 rainfall days, and 1287mm (50.67") of precipitation is accumulated.Daylight
In January, the average length of the day in Java is 12h and 7min.On the first day of January in Java, sunrise is at 05:33 and sunset at 17:39. On the last day of the month, sunrise is at 05:43 and sunset at 17:49 GMT.
Sunshine
In January, the average sunshine in Java is 8.3h.UV index
January through May, October through December, with an average maximum UV index of 7, are months with the highest UV index in Java, São Tomé and Príncipe. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 7 in January converts into the following recommendations:
Ward off overexposure. Defence against solar harm is crucial. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Java, São Tomé and Príncipe
- Average high temperature in January: 28°C
The warmest month (with the highest average high temperature) is March (28.8°C).
The month with the lowest average high temperature is July (24.5°C).
- Average low temperature in January: 27°C
The month with the highest average low temperature is March (27.5°C).
The coldest month (with the lowest average low temperature) is July (23°C).
Average pressure in January
Java, São Tomé and Príncipe
- Average pressure in January: 1010.7mbar
The month with the highest atmospheric pressure is July (1014.3mbar).
The month with the lowest atmospheric pressure is February (1009.8mbar).
Average wind speed in January
Java, São Tomé and Príncipe
- Average wind speed in January: 11.1km/h
The windiest month (with the highest average wind speed) is July (17.7km/h).
The calmest month (with the lowest average wind speed) is December (10.8km/h).
Average humidity in January
Java, São Tomé and Príncipe
- Average humidity in January: 77%
The months with the highest relative humidity are August, September and October (83%).
The month with the lowest relative humidity is March (76%).
Average rainfall in January
Java, São Tomé and Príncipe
- Average rainfall in January: 130mm
The wettest month (with the highest rainfall) is November (224mm).
The driest month (with the least rainfall) is July (9mm).
Average rainfall days in January
Java, São Tomé and Príncipe
- Average rainfall days in January: 27.1 days
The month with the highest number of rainy days is December (28.6 days).
The month with the least rainy days is June (7.3 days).
Average daylight in January /
Average sunshine in January
Java, São Tomé and Príncipe
- Average daylight in January: 12h and 6min
The month with the longest days is June (Average daylight: 12h and 6min).
The month with the shortest days is November (Average daylight: 12h and 6min).
- Average sunshine in January: 8h and 18min
The month with the most sunshine is February (Average sunshine: 8h and 36min).
The month with the least sunshine is August (Average sunshine: 5h and 0min).
Average sunshine days in January
Java, São Tomé and Príncipe
- Average sunshine days in January: 3.1 days
The month with the most sunshine days is June (16.4 days).
The month with the least sunshine days is December (1.5 days).
Average UV index in January
Java, São Tomé and Príncipe
- Average UV index in January: 7
The months with the highest UV index are January, February, March, April, May, October, November and December (UV index 7).
The month with the lowest UV index is July (UV index 5).
Average cloud cover in January
Java, São Tomé and Príncipe
- Average cloud cover in January: 38
The month with the most cloud cover is August (Cloud cover 65).
The month with the least cloud cover is February (Cloud cover 37).
Average visibility in January
Java, São Tomé and Príncipe
- Average visibility in January: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September and December (10km).
The months with the lowest visibility are October and November (9km).
