December weather forecast
Santa Rita, GU

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Weather in December

As the calendar turns to December, Santa Rita rounds off the year with continued warm temperatures and a further drop in rainfall to 2.99" (76mm). The rarity of tropical landscapes under warm winter sun remains a sight to behold. Shorter days pervade December yet the city continues to bathe under sufficient day sunlight. December in Santa Rita serves as a gentle reminder of the warmth and vibrancy Guam maintains all year round.

Temperature

The transition into December in Santa Rita is marked with an average high-temperature of a still warm 83.5°F (28.6°C), showing an insignificant shift from November's 84.2°F (29°C). During December, Santa Rita's temperature shows a minor deviation from daytime highs, falling to a steady low-temperature average of 82°F (27.8°C).

Heat index

The heat index value during December is appraised at a tropical 91.4°F (33°C). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
Heat index determinations are made taking into account the shade and light air movements. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', melds the effects of warmth and moisture to generate a feeling of heat. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.

Humidity

January, March through May, October through December, with an average relative humidity of 78%, are the most humid months.

Rainfall

In Santa Rita, in December, during 22.8 rainfall days, 2.99" (76mm) of precipitation is typically accumulated. In Santa Rita, Guam, during the entire year, the rain falls for 288.5 days and collects up to 60.08" (1526mm) of precipitation.

Ocean temperature

In Santa Rita, in December, the average water temperature is 83.1°F (28.4°C).
Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) provides warmth and pleasure, making water activities enjoyable for lengthened periods without feeling uncomfortable.

Daylight

With an average of 11h and 24min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 6:28 am and sunset at 5:52 pm. On the last day of December, in Santa Rita, sunrise is at 6:43 am and sunset at 6:04 pm ChST.

Sunshine

In December, the average sunshine in Santa Rita is 6.5h.

UV index

January through August, October through December, with an average maximum UV index of 7, are months with the highest UV index in Santa Rita. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: An average maximum UV index of 7 in December leads to these recommendations:
Deter overexposure. Protecting against the sun's effects is essential. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Stay vigilant! UV rays get a boost in intensity due to sand and water reflections.
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Frequently asked questions

How hot is it in Santa Rita in December?

The high-temperature in Santa Rita, Guam, during December is 83.5°F (28.6°C) and the low-temperature is 82°F (27.8°C). In December, the average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, is appraised at 91.4°F (33°C).

What are the most humid months in Santa Rita?

January, March through May, October through December, with an average relative humidity of 78%, are most humid months in Santa Rita, Guam.

What is the average humidity in December in Santa Rita?

In December, the average relative humidity is 78%.

How much does it rain in Santa Rita in December?

In December, the rain falls for 22.8 days. Throughout December, 2.99" (76mm) of precipitation is accumulated.

How warm is the water in December in Santa Rita?

In December, the average ocean temperature in Santa Rita, Guam, is 83.1°F (28.4°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the month with the shortest days in Santa Rita?

The month with the shortest days is December, with an average of 11h and 24min of daylight.

How many hours of daylight does Santa Rita have in December?

In Santa Rita, Guam, the average day length in December is 11h and 22min.

What time are sunrise and sunset in December in Santa Rita?

In December, on the first day of the month, sunrise is at 6:28 am and sunset at 5:52 pm. On the last day of the month, in Santa Rita, Guam, sunrise is at 6:43 am and sunset at 6:04 pm ChST.

How many hours of sunshine does Santa Rita have in December?

The average sunshine duration in December in Santa Rita is 6.5h.

What is the month with the highest UV index in Santa Rita?

January through August, October through December, with an average maximum UV index of 7, are months with the highest UV index in Santa Rita.

How high is the UV index in December in Santa Rita?

In December, the average daily maximum UV index in Santa Rita is 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to Sun's UV rays.

Average temperature in December
Santa Rita, GU

Average temperature in December - Santa Rita, GU
  • Average high temperature in December: 83.5°F

The warmest months (with the highest average high temperature) are July and August (84.7°F).
The month with the lowest average high temperature is February (81.7°F).

  • Average low temperature in December: 82°F

The month with the highest average low temperature is June (83.3°F).
The coldest month (with the lowest average low temperature) is February (79.7°F).

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Average pressure in December
Santa Rita, GU

Average pressure in December - Santa Rita, GU
  • Average pressure in December: 29.83"Hg

The month with the highest atmospheric pressure is February (29.88"Hg).
The months with the lowest atmospheric pressure are August, September and October (29.79"Hg).

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Average wind speed in December
Santa Rita, GU

Average wind speed in December - Santa Rita, GU
  • Average wind speed in December: 15.7mph

The windiest month (with the highest average wind speed) is February (16.3mph).
The calmest month (with the lowest average wind speed) is August (9.6mph).

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Average humidity in December
Santa Rita, GU

Average humidity in December - Santa Rita, GU
  • Average humidity in December: 78%

The months with the highest relative humidity are January, March, April, May, October, November and December (78%).
The month with the lowest relative humidity is August (76%).

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Average rainfall in December
Santa Rita, GU

Average rainfall in December - Santa Rita, GU
  • Average rainfall in December: 2.99"

The wettest month (with the highest rainfall) is September (10.28").
The driest month (with the least rainfall) is March (1.81").

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Average rainfall days in December
Santa Rita, GU

Average rainfall days in December - Santa Rita, GU
  • Average rainfall days in December: 22.8 days

The months with the highest number of rainy days are July and August (28.9 days).
The month with the least rainy days is February (17.5 days).

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Average sea temperature in December
Santa Rita, GU

Average sea temperature in December - Santa Rita, GU
  • Average sea temperature in December: 83.2°F

The best month for swimming (with the highest average sea temperature) is August (85.4°F).
The coldest month (with the lowest average sea temperature) is February (82°F).

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Average daylight in December /
Average sunshine in December
Santa Rita, GU

Average daylight in December / Average sunshine in December - Santa Rita, GU
  • Average daylight in December: 11h and 2min

The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 24min).

  • Average sunshine in December: 6h and 3min

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is November (Average sunshine: 6h and 18min).

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Average sunshine days in December
Santa Rita, GU

Average sunshine days in December - Santa Rita, GU
  • Average sunshine days in December: 4.7 days

The month with the most sunshine days is March (6.6 days).
The month with the least sunshine days is September (1.1 days).

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Average UV index in December
Santa Rita, GU

Average UV index in December - Santa Rita, GU
  • Average UV index in December: 7

The months with the highest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 7).
The month with the lowest UV index is September (UV index 6).

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Average cloud cover in December
Santa Rita, GU

Average cloud cover in December - Santa Rita, GU
  • Average cloud cover in December: 44

The months with the most cloud cover are January, August and October (Cloud cover 46).
The months with the least cloud cover are May and June (Cloud cover 39).

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Average visibility in December
Santa Rita, GU

Average visibility in December - Santa Rita, GU
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Santa Rita, Guam, USA

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