Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
São Francisco do Maranhão starts December with an average high-temperature of a still tropical 33.2°C (91.8°F), a minor shift from November's 34.6°C (94.3°F). São Francisco do Maranhão experiences a nighttime temperature average of 23.8°C (74.8°F) during December.Heat index
The heat index value for December is computed to be a blistering 42°C (107.6°F). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.Know that the heat index computations account for shaded terrains and slight winds. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', gives a temperature feeling by integrating air temperature and humidity. 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. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.
Humidity
In December, the average relative humidity in São Francisco do Maranhão, Brazil, is 64%.Rainfall
In São Francisco do Maranhão, in December, it is raining for 18.5 days, with typically 65mm (2.56") of accumulated precipitation. Throughout the year, there are 157.4 rainfall days, and 636mm (25.04") of precipitation is accumulated.Daylight
With an average of 12h and 30min of daylight, December has the longest days of the year in São Francisco do Maranhão.On the first day of the month, sunrise is at 05:26 and sunset at 17:54. On the last day of December, sunrise is at 05:40 and sunset at 18:09 -03.
Sunshine
The average sunshine in December in São Francisco do Maranhão, Brazil, is 9.1h.UV index
January through August, October through December, with an average maximum UV index of 7, are months with the lowest UV index in São Francisco do Maranhão. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.Note: The maximum UV index of 7 during December leads to these instructions:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Stay sun-safe with clothing that is both closely woven and worn loosely.
Frequently asked questions
How hot does it get in São Francisco do Maranhão in December?
What is the average humidity in December in São Francisco do Maranhão?
How many days does it rain in December in São Francisco do Maranhão?
When are the longest days in São Francisco do Maranhão?
What is the average length of the day in December in São Francisco do Maranhão?
When is the sunrise / sunset in December in São Francisco do Maranhão?
How long on average sun shines in December in São Francisco do Maranhão?
What is the month with the lowest UV index in São Francisco do Maranhão?
What is the UV index reading in December in São Francisco do Maranhão?
Average temperature in December
São Francisco do Maranhão, Brazil
- Average high temperature in December: 33.2°C
The warmest months (with the highest average high temperature) are September and October (36.5°C).
The months with the lowest average high temperature are March and April (31.4°C).
- Average low temperature in December: 23.8°C
The month with the highest average low temperature is October (25°C).
The coldest month (with the lowest average low temperature) is July (21.8°C).
Average pressure in December
São Francisco do Maranhão, Brazil
- Average pressure in December: 1009.7mbar
The month with the highest atmospheric pressure is July (1013.9mbar).
The month with the lowest atmospheric pressure is November (1008.9mbar).
Average wind speed in December
São Francisco do Maranhão, Brazil
- Average wind speed in December: 8.3km/h
The windiest month (with the highest average wind speed) is July (15.9km/h).
The calmest month (with the lowest average wind speed) is March (7.3km/h).
Average humidity in December
São Francisco do Maranhão, Brazil
- Average humidity in December: 64%
The month with the highest relative humidity is March (78%).
The month with the lowest relative humidity is September (39%).
Average rainfall in December
São Francisco do Maranhão, Brazil
- Average rainfall in December: 65mm
The wettest month (with the highest rainfall) is March (137mm).
The driest month (with the least rainfall) is August (0mm).
Average rainfall days in December
São Francisco do Maranhão, Brazil
- Average rainfall days in December: 18.5 days
The month with the highest number of rainy days is March (26.8 days).
The month with the least rainy days is August (0.5 days).
Average daylight in December /
Average sunshine in December
São Francisco do Maranhão, Brazil
- Average daylight in December: 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 48min).
- Average sunshine in December: 9h and 1min
The month with the most sunshine is September (Average sunshine: 9h and 54min).
The month with the least sunshine is April (Average sunshine: 7h and 24min).
Average sunshine days in December
São Francisco do Maranhão, Brazil
- Average sunshine days in December: 11 days
The month with the most sunshine days is August (30.2 days).
The month with the least sunshine days is March (3.1 days).
Average UV index in December
São Francisco do Maranhão, Brazil
- Average UV index in December: 7
The month with the highest UV index is September (UV index 8).
The months with the lowest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 7).
Average cloud cover in December
São Francisco do Maranhão, Brazil
- Average cloud cover in December: 41
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in December
São Francisco do Maranhão, Brazil
- Average visibility in December: 10km
The months with the highest visibility are May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March and April (9km).
São Francisco do Maranhão, Brazil
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