December weather forecastMazatlán, Mexico
December
Weather in December
Rounding off the year, December in Mazatlán witnesses a decline in temperature and rainfall levels to 25.5°C (77.9°F) and 11mm (0.43") over 3.7 days, thus resuming the initial January-based weather trend. The city displays a steady consistency in its weather conditions throughout the year with warm and sunny days characterizing the months. With a drop in sea temperatures to 23.7°C (74.7°F), December offers chiller beach days than earlier months. With a drop in rainfall and a dip in temperature, December marks the end of the cycle, preparing to start anew come January. Weather conditions towards the year-end make Mazatlán a lovely place to ring in the New Year's Eve celebrations.Temperature
Mazatlán marks the onset of December with an average high-temperature of a still moderately hot 25.5°C (77.9°F), a subtle shift from November's 28.3°C (82.9°F). Mazatlán encounters a steady low-temperature average of 20.3°C (68.5°F) throughout the month of December.Humidity
In December, the average relative humidity in Mazatlán, Mexico, is 63%.Rainfall
In Mazatlán, in December, during 3.7 rainfall days, 11mm (0.43") of precipitation is typically accumulated. In Mazatlán, during the entire year, the rain falls for 113.9 days and collects up to 454mm (17.87") of precipitation.Sea temperature
In Mazatlán, the average seawater temperature in December is 23.7°C (74.7°F).Note: For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 23.7°C (74.7°F).
Daylight
December has the shortest days of the year in Mazatlán, with an average of 10h and 42min of daylight.On the first day of December in Mazatlán, sunrise is at 6:30 am and sunset at 5:19 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 5:31 pm MST.
Sunshine
The average sunshine in December is 7.4h.UV index
The months with the lowest UV index are January through April, November and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The average daily UV index of 6 in December transforms into the following instructions:
Guard against overexposure. Protection from sun-induced harm is essential. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat. Be wary! Reflections from sand and water make UV radiation more intense.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Mazatlán, Mexico
- Average high temperature in December: 25.5°C
The warmest month (with the highest average high temperature) is August (30.9°C).
The month with the lowest average high temperature is February (25.1°C).
- Average low temperature in December: 20.3°C
The months with the highest average low temperature are July and August (26.9°C).
The coldest months (with the lowest average low temperature) are January and February (19.4°C).
Average pressure in December
Mazatlán, Mexico
- Average pressure in December: 1014.8mbar
The month with the highest atmospheric pressure is January (1015.4mbar).
The month with the lowest atmospheric pressure is September (1011.2mbar).
Average wind speed in December
Mazatlán, Mexico
- Average wind speed in December: 10.9km/h
The windiest month (with the highest average wind speed) is February (11.7km/h).
The calmest month (with the lowest average wind speed) is July (10.5km/h).
Average humidity in December
Mazatlán, Mexico
- Average humidity in December: 63%
The month with the highest relative humidity is September (77%).
The months with the lowest relative humidity are January and March (60%).
Average rainfall in December
Mazatlán, Mexico
- Average rainfall in December: 11mm
The wettest month (with the highest rainfall) is September (121mm).
The driest month (with the least rainfall) is April (0mm).
Average rainfall days in December
Mazatlán, Mexico
- Average rainfall days in December: 3.7 days
The month with the highest number of rainy days is August (25.3 days).
The month with the least rainy days is April (0.6 days).
Average sea temperature in December
Mazatlán, Mexico
- Average sea temperature in December: 23.7°C
The best month for swimming (with the highest average sea temperature) is August (30.6°C).
The coldest month (with the lowest average sea temperature) is February (21.6°C).
Average daylight in December /
Average sunshine in December
Mazatlán, Mexico
- Average daylight in December: 10h and 42min
The month with the longest days is June (Average daylight: 13h and 30min).
The month with the shortest days is December (Average daylight: 10h and 42min).
- Average sunshine in December: 7h and 24min
The month with the most sunshine is May (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 7h and 18min).
Average sunshine days in December
Mazatlán, Mexico
- Average sunshine days in December: 26.4 days
The month with the most sunshine days is April (29.3 days).
The month with the least sunshine days is August (1.9 days).
Average UV index in December
Mazatlán, Mexico
- Average UV index in December: 6
The months with the highest UV index are May, June, July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, November and December (UV index 6).
Average cloud cover in December
Mazatlán, Mexico
- Average cloud cover in December: 14
The month with the most cloud cover is August (Cloud cover 33).
The month with the least cloud cover is May (Cloud cover 10).
Average visibility in December
Mazatlán, 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).
