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 sea temperature 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
Weather in January
Temperature
The temperatures reach their highest averages in January, with highs of 27.3°C (81.1°F) and lows of 20.9°C (69.6°F).Heat index
January's average heat index is evaluated at a hot 31°C (87.8°F). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', measures the perceived warmth when incorporating the humidity present in the air. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
Humidity
The average relative humidity in January in São José is 84%.Rainfall
In January, in São José, the rain falls for 20.8 days. Throughout January, 101mm (3.98") of precipitation is accumulated. Throughout the year, there are 202.2 rainfall days, and 904mm (35.59") of precipitation is accumulated.Sea temperature
January and February, with an average sea temperature of 25.8°C (78.4°F), are months with the warmest seawater in São José.Note: Water temperatures between 25°C (77°F) and 29°C (84.2°F) are regarded as very warm, ensuring all water activities are pleasurable for extended periods without feeling uneasy.
Daylight
In São José, the average length of the day in January is 13h and 39min.On the first day of the month, sunrise is at 05:22 and sunset at 19:13. On the last day of January, sunrise is at 05:46 and sunset at 19:09 -03.
Sunshine
In January, the average sunshine in São José is 7.5h.UV index
January through March and December, with an average maximum UV index of 6, are months with the highest UV index in São José. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 6 during January translates into the following recommendations:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. To cut down UV radiation exposure by about half, sport a wide-brim hat. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the hottest in São José?
What are the temperatures in São José in January?
What is the average humidity in January in São José?
How many days does it rain in January in São José?
When is the sea warmest in São José?
What is the water temperature in January in São José?
How many hours of daylight does São José have in January?
What time are sunrise and sunset in January in São José?
How long on average sun shines in January in São José?
What are the months with the highest UV index in São José?
What is the UV index reading in January in São José?
Average temperature in January
São José, Brazil
- Average high temperature in January: 27.3°C
The warmest month (with the highest average high temperature) is January (27.3°C).
The month with the lowest average high temperature is July (19.1°C).
- Average low temperature in January: 20.9°C
The month with the highest average low temperature is February (21.1°C).
The coldest month (with the lowest average low temperature) is July (13.1°C).
Average pressure in January
São José, Brazil
- Average pressure in January: 1012.8mbar
The month with the highest atmospheric pressure is July (1020.2mbar).
The month with the lowest atmospheric pressure is December (1012.2mbar).
Average wind speed in January
São José, Brazil
- Average wind speed in January: 10.7km/h
The windiest month (with the highest average wind speed) is November (11.8km/h).
The calmest month (with the lowest average wind speed) is March (10km/h).
Average humidity in January
São José, Brazil
- Average humidity in January: 84%
The month with the highest relative humidity is October (85%).
The months with the lowest relative humidity are March, April, June, August, November and December (83%).
Average rainfall in January
São José, Brazil
- Average rainfall in January: 101mm
The wettest month (with the highest rainfall) is February (104mm).
The driest months (with the least rainfall) are August and November (57mm).
Average rainfall days in January
São José, Brazil
- Average rainfall days in January: 20.8 days
The months with the highest number of rainy days are January and March (20.8 days).
The month with the least rainy days is June (12.3 days).
Average sea temperature in January
São José, Brazil
- Average sea temperature in January: 25.8°C
The best months for swimming (with the highest average sea temperature) are January and February (25.8°C).
The coldest month (with the lowest average sea temperature) is July (18.6°C).
Average daylight in January /
Average sunshine in January
São José, Brazil
- Average daylight in January: 13h and 4min
The month with the longest days is December (Average daylight: 13h and 54min).
The month with the shortest days is June (Average daylight: 10h and 24min).
- Average sunshine in January: 7h and 3min
The months with the most sunshine are February and April (Average sunshine: 7h and 42min).
The month with the least sunshine is October (Average sunshine: 6h and 42min).
Average sunshine days in January
São José, Brazil
- Average sunshine days in January: 8.7 days
The month with the most sunshine days is June (15.2 days).
The month with the least sunshine days is February (6.3 days).
Average UV index in January
São José, Brazil
- Average UV index in January: 6
The months with the highest UV index are January, February, March and December (UV index 6).
The months with the lowest UV index are July and September (UV index 4).
Average cloud cover in January
São José, Brazil
- Average cloud cover in January: 49
The month with the most cloud cover is October (Cloud cover 53).
The month with the least cloud cover is June (Cloud cover 37).
Average visibility in January
São José, Brazil
- Average visibility in January: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
São José, Brazil
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