January weather forecastPiti, GU
January
Weather in January
Weather in Piti, Guam, begins the new year with moderate high temperatures. Minor variations in weather are noticeable from December, mainly a slight rise in temperature and less rainfall. Relatively, January is a tad cooler than February, which brings about a subtle shift in climates. Piti's January weather manifests itself through a gentle touch of sunlight and gentle sea breezes, which add to the charm of the island city. The average wind speed in January, significantly reaching 15.8mph (25.4km/h), complements the balmy weather.Temperature
The start of January sees the average high-temperature at a still moderately hot 82°F (27.8°C), showing little difference from December's 83.5°F (28.6°C). Piti sees a minor drop to an average minimum temperature of 80.6°F (27°C) during the night in the month of January.Heat index
In January, the heat index is appraised at a hot 87.8°F (31°C). Persisting in activity during long-term exposure might induce weariness, with subsequent heat cramps.Understand that the heat index values take into account shaded locations and mild winds. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Humidity
January, March through May, October through December, with an average relative humidity of 78%, are the most humid months.Rainfall
In Piti, in January, it is raining for 21.3 days, with typically 2.83" (72mm) of accumulated precipitation. Throughout the year, there are 288.5 rainfall days, and 60.08" (1526mm) of precipitation is accumulated.Ocean temperature
In Piti, in January, the average water temperature is 82.9°F (28.3°C).Note: Between the temperatures of 77°F (25°C) and 84.2°F (29°C), water is considered very warm, providing pleasure in water activities without discomfort over lengthy periods.
Daylight
The average length of the day in January is 11h and 26min.On the first day of the month, sunrise is at 6:43 am and sunset at 6:04 pm. On the last day of January, sunrise is at 6:48 am and sunset at 6:20 pm ChST.
Sunshine
In Piti, the average sunshine in January is 7.6h.UV index
The months with the highest UV index in Piti are January through August, October through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 7 during January leads to these advisories:
Inhibit overexposure. Warding off sun damage is of utmost importance. 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. Opt for tightly woven and loose clothing to enhance protection from the Sun. Attention! The combination of sand and water reflections enhances UV ray intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Piti, GU
- Average high temperature in January: 82°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 January: 80.6°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).
Average pressure in January
Piti, GU
- Average pressure in January: 29.86"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).
Average wind speed in January
Piti, GU
- Average wind speed in January: 15.8mph
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).
Average humidity in January
Piti, GU
- Average humidity in January: 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%).
Average rainfall in January
Piti, GU
- Average rainfall in January: 2.83"
The wettest month (with the highest rainfall) is September (10.28").
The driest month (with the least rainfall) is March (1.81").
Average rainfall days in January
Piti, GU
- Average rainfall days in January: 21.3 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).
Average sea temperature in January
Piti, GU
- Average sea temperature in January: 82.9°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).
Average daylight in January /
Average sunshine in January
Piti, GU
- Average daylight in January: 11h and 24min
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 January: 7h and 36min
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).
Average sunshine days in January
Piti, GU
- Average sunshine days in January: 5.4 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).
Average UV index in January
Piti, GU
- Average UV index in January: 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).
Average cloud cover in January
Piti, GU
- Average cloud cover in January: 46
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).
Average visibility in January
Piti, GU
- Average visibility in January: 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).
