December weather forecastPetacalco, Mexico
December
Weather in December
December, the first month of the winter in Petacalco, is still a hot month, with temperature in the range of an average low of 22.5°C (72.5°F) and an average high of 30.4°C (86.7°F).Temperature
Petacalco signifies an average high-temperature of a still tropical 30.4°C (86.7°F) in December, closely mirroring the 31°C (87.8°F) of November. Throughout December, Petacalco records an average temperature of 22.5°C (72.5°F) at night.Heat index
Throughout December, the heat index is estimated at a sweltering 36°C (96.8°F). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.Realize that the values for the heat index are set for shaded places and light winds. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', reflects the blend of air temperature and relative humidity to give a temperature impression. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.
Humidity
In Petacalco, the average relative humidity in December is 68%.Rainfall
In December, the rain falls for 2 days. Throughout December, 3mm (0.12") of precipitation is accumulated. Throughout the year, there are 78.8 rainfall days, and 363mm (14.29") of precipitation is accumulated.Daylight
December has the shortest days of the year, with an average of 11h and 6min of daylight.On the first day of December, sunrise is at 7:03 am and sunset at 6:11 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 6:24 pm CST.
Sunshine
The average sunshine in December is 9.9h.UV index
The months with the highest UV index in Petacalco are January through December, with an average maximum UV index of 7. 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 risk from unsafe exposure to UV radiation for average individuals.Note: A typical high UV index of 7 in December suggests the following recommendations:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Petacalco, Mexico
- Average high temperature in December: 30.4°C
The warmest month (with the highest average high temperature) is August (31.8°C).
The month with the lowest average high temperature is February (29.8°C).
- Average low temperature in December: 22.5°C
The month with the highest average low temperature is June (24.8°C).
The coldest months (with the lowest average low temperature) are February and March (21.6°C).
Average pressure in December
Petacalco, Mexico
- Average pressure in December: 1013.1mbar
The month with the highest atmospheric pressure is January (1013.7mbar).
The month with the lowest atmospheric pressure is May (1010.8mbar).
Average wind speed in December
Petacalco, Mexico
- Average wind speed in December: 7.5km/h
The windiest month (with the highest average wind speed) is January (8.4km/h).
The calmest month (with the lowest average wind speed) is November (7.4km/h).
Average humidity in December
Petacalco, Mexico
- Average humidity in December: 68%
The month with the highest relative humidity is October (78%).
The months with the lowest relative humidity are January and March (64%).
Average rainfall in December
Petacalco, Mexico
- Average rainfall in December: 3mm
The wettest month (with the highest rainfall) is August (89mm).
The driest month (with the least rainfall) is April (0mm).
Average rainfall days in December
Petacalco, Mexico
- Average rainfall days in December: 2 days
The month with the highest number of rainy days is September (14.5 days).
The month with the least rainy days is March (1.2 days).
Average daylight in December /
Average sunshine in December
Petacalco, Mexico
- Average daylight in December: 11h and 6min
The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 6min).
- Average sunshine in December: 9h and 54min
The month with the most sunshine is April (Average sunshine: 10h and 0min).
The month with the least sunshine is September (Average sunshine: 9h and 0min).
Average sunshine days in December
Petacalco, Mexico
- Average sunshine days in December: 28.1 days
The month with the most sunshine days is March (30.1 days).
The month with the least sunshine days is September (12.1 days).
Average UV index in December
Petacalco, Mexico
- Average UV index in December: 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 December
Petacalco, Mexico
- Average cloud cover in December: 9
The month with the most cloud cover is September (Cloud cover 32).
The month with the least cloud cover is April (Cloud cover 6).
Average visibility in December
Petacalco, Mexico
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
