December weather forecastOkayama, Japan
December weather forecast for Okayama, Japan: December brings in the cold wave in Okayama, seeing temperatures drop further to 11.6°C (52.9°F) from the preceding month. In Okayama, in December, during 15 rainfall days, 31mm (1.22") of precipitation is typically accumulated.
December
Weather in December
December brings in the cold wave in Okayama, seeing temperatures drop further to 11.6°C (52.9°F) from the preceding month. A sharp decrease in rainfall to 31mm (1.22") signals the onset of the city's winter season. The second shortest daylight hours of the year means more time to enjoy the illuminations of holiday lights against the nighttime sky. Despite the increasing cold, the city does not lose any of its vibrancy with bustling holiday festivities. As the year comes to a close, Okayama provides enchanting winter scenery, setting the stage for the arrival of a new year with renewed hopes.Temperature
In Okayama, the average high-temperature in December drops from a comfortable 16.8°C (62.2°F) in November to a fresh 11.6°C (52.9°F). An average low-temperature of 3.3°C (37.9°F) is noted during the month of December.Humidity
The average relative humidity in December is 67%.Rainfall
December is the month with the least rainfall. Rain falls for 15 days and accumulates 31mm (1.22") of precipitation.Snowfall
In Okayama, snow does not fall in April through December.Sea temperature
In December, the average sea temperature is 17.1°C (62.8°F).Note: Swimming is not a pleasurable activity for the majority in water at 17.1°C (62.8°F). Breathing control gets harder as the water temperature dips from 21°C (69.8°F) to 15°C (59°F).
Daylight
With an average of 9h and 54min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 06:53 and sunset at 16:53. On the last day of the month, sunrise is at 07:11 and sunset at 17:03 JST.
Sunshine
The average sunshine in December in Okayama is 5.1h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: A maximum UV index of 2 in December translates into the following recommendations:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Okayama, Japan
- Average high temperature in December: 11.6°C
The warmest month (with the highest average high temperature) is August (32.7°C).
The month with the lowest average high temperature is January (9°C).
- Average low temperature in December: 3.3°C
The month with the highest average low temperature is August (24.7°C).
The coldest month (with the lowest average low temperature) is January (1.1°C).
Average humidity in December
Okayama, Japan
- Average humidity in December: 67%
The month with the highest relative humidity is July (73%).
The month with the lowest relative humidity is April (60%).
Average rainfall in December
Okayama, Japan
- Average rainfall in December: 31mm
The wettest month (with the highest rainfall) is June (171.5mm).
The driest month (with the least rainfall) is December (31mm).
Average rainfall days in December
Okayama, Japan
- Average rainfall days in December: 15 days
The months with the highest number of rainy days are January and March (18 days).
The month with the least rainy days is August (13 days).
Average snowfall in December
Okayama, Japan
- Average snowfall in December: 0mm
The months with the highest snowfall are January, February and March (10mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).
Average sea temperature in December
Okayama, Japan
- Average sea temperature in December: 17.1°C
The best month for swimming (with the highest average sea temperature) is August (27.2°C).
The coldest month (with the lowest average sea temperature) is February (13.3°C).
Average daylight in December /
Average sunshine in December
Okayama, Japan
- Average daylight in December: 9h and 54min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 5h and 6min
The month with the most sunshine is August (Average sunshine: 6h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average UV index in December
Okayama, Japan
- Average UV index in December: 2
The month with the highest UV index is July (UV index 11).
The month with the lowest UV index is December (UV index 2).
