December weather forecastSan Luis, Guatemala
December
Weather in December
The first month of the winter, December, is still a warm month in San Luis, Guatemala, with temperature in the range of an average low of 17°C (62.6°F) and an average high of 25.6°C (78.1°F).Temperature
San Luis's entry into December measures an average high-temperature of a still moderately hot 25.6°C (78.1°F), closely parallel to the preceding month. Throughout the month of December, the nighttime temperature dips to an average of 17°C (62.6°F).Humidity
In December, the average relative humidity in San Luis is 88%.Rainfall
In San Luis, in December, it is raining for 18.4 days, with typically 50mm (1.97") of accumulated precipitation. Throughout the year, there are 260.2 rainfall days, and 1135mm (44.69") of precipitation is accumulated.Daylight
December has the shortest days of the year, with an average of 11h and 12min of daylight.On the first day of the month, sunrise is at 06:10 and sunset at 17:24. On the last day of December, in San Luis, sunrise is at 06:25 and sunset at 17:36 CST.
Sunshine
The average sunshine in December in San Luis is 4.8h.UV index
The months with the lowest UV index are January, October through December, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 5 in December translates into these instructions:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
San Luis, Guatemala
- Average high temperature in December: 25.6°C
The warmest month (with the highest average high temperature) is April (32.8°C).
The month with the lowest average high temperature is January (25.4°C).
- Average low temperature in December: 17°C
The month with the highest average low temperature is June (21.5°C).
The coldest month (with the lowest average low temperature) is January (16.3°C).
Average pressure in December
San Luis, Guatemala
- Average pressure in December: 1016.4mbar
The month with the highest atmospheric pressure is January (1017.4mbar).
The month with the lowest atmospheric pressure is September (1012mbar).
Average wind speed in December
San Luis, Guatemala
- Average wind speed in December: 4.4km/h
The windiest month (with the highest average wind speed) is April (6.3km/h).
The calmest month (with the lowest average wind speed) is October (4.2km/h).
Average humidity in December
San Luis, Guatemala
- Average humidity in December: 88%
The month with the highest relative humidity is November (89%).
The month with the lowest relative humidity is April (74%).
Average rainfall in December
San Luis, Guatemala
- Average rainfall in December: 50mm
The wettest month (with the highest rainfall) is October (171mm).
The driest month (with the least rainfall) is February (33mm).
Average rainfall days in December
San Luis, Guatemala
- Average rainfall days in December: 18.4 days
The month with the highest number of rainy days is September (27.9 days).
The month with the least rainy days is February (14.9 days).
Average daylight in December /
Average sunshine in December
San Luis, Guatemala
- Average daylight in December: 11h and 12min
The month with the longest days is June (Average daylight: 13h and 6min).
The month with the shortest days is December (Average daylight: 11h and 12min).
- Average sunshine in December: 4h and 48min
The month with the most sunshine is April (Average sunshine: 9h and 42min).
The months with the least sunshine are January and November (Average sunshine: 4h and 24min).
Average sunshine days in December
San Luis, Guatemala
- Average sunshine days in December: 9.1 days
The month with the most sunshine days is March (11.7 days).
The month with the least sunshine days is September (1.4 days).
Average UV index in December
San Luis, Guatemala
- Average UV index in December: 5
The months with the highest UV index are March, April and June (UV index 7).
The months with the lowest UV index are January, October, November and December (UV index 5).
Average cloud cover in December
San Luis, Guatemala
- Average cloud cover in December: 67
The month with the most cloud cover is November (Cloud cover 71).
The month with the least cloud cover is April (Cloud cover 42).
Average visibility in December
San Luis, Guatemala
- Average visibility in December: 6km
The month with the highest visibility is April (8km).
The months with the lowest visibility are January, February, September, October, November and December (6km).
