December weather forecastSumoto, Japan
December
Weather in December
December, the first month of the winter in Sumoto, is also a fresh month, with an average temperature fluctuating between 11.9°C (53.4°F) and 8.9°C (48°F).Temperature
The arrival of December signals a subtle shift in temperature, down from a refreshing 16.8°C (62.2°F) in November to a fresh 11.9°C (53.4°F). Sumoto experiences an average nighttime temperature of 8.9°C (48°F) in December, reflecting a minor difference from the day's peak.Humidity
In December, the average relative humidity is 69%.Rainfall
In Sumoto, in December, during 19.2 rainfall days, 70mm (2.76") of precipitation is typically accumulated. In Sumoto, during the entire year, the rain falls for 195.3 days and collects up to 1230mm (48.43") of precipitation.Snowfall
March through December are months without snowfall in Sumoto.Sea temperature
In Sumoto, the average seawater temperature in December is 19.3°C (66.7°F).Note: In water of 19.3°C (66.7°F), the majority of people do not enjoy swimming. Breathing becomes increasingly hard to manage as the temperature drops from 21°C (69.8°F) to 15°C (59°F).
Daylight
The month with the shortest days in Sumoto is December, with an average of 9h and 54min of daylight.On the first day of the month, sunrise is at 06:48 and sunset at 16:50. On the last day of December, in Sumoto, sunrise is at 07:06 and sunset at 17:00 JST.
Sunshine
In December, the average sunshine in Sumoto, Japan, is 5.4h.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The average daily UV index of 3 in December transforms into the following instructions:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sumoto, Japan
- Average high temperature in December: 11.9°C
The warmest month (with the highest average high temperature) is August (29.2°C).
The month with the lowest average high temperature is January (9.7°C).
- Average low temperature in December: 8.9°C
The month with the highest average low temperature is August (26.1°C).
The coldest month (with the lowest average low temperature) is January (6.4°C).
Average pressure in December
Sumoto, Japan
- Average pressure in December: 1019.6mbar
The months with the highest atmospheric pressure are January and February (1019.9mbar).
The month with the lowest atmospheric pressure is June (1008.7mbar).
Average wind speed in December
Sumoto, Japan
- Average wind speed in December: 23.3km/h
The windiest month (with the highest average wind speed) is January (23.6km/h).
The calmest month (with the lowest average wind speed) is June (12.5km/h).
Average humidity in December
Sumoto, Japan
- Average humidity in December: 69%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is January (67%).
Average rainfall in December
Sumoto, Japan
- Average rainfall in December: 70mm
The wettest month (with the highest rainfall) is July (190mm).
The driest month (with the least rainfall) is January (44mm).
Average rainfall days in December
Sumoto, Japan
- Average rainfall days in December: 19.2 days
The month with the highest number of rainy days is July (20.7 days).
The months with the least rainy days are February and May (13.2 days).
Average snowfall in December
Sumoto, Japan
- Average snowfall in December: 0mm
The month with the highest snowfall is February (9mm).
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in December
Sumoto, Japan
- Average snowfall days in December: 0.3 days
The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature in December
Sumoto, Japan
- Average sea temperature in December: 19.3°C
The best month for swimming (with the highest average sea temperature) is August (27.8°C).
The coldest month (with the lowest average sea temperature) is February (15.7°C).
Average daylight in December /
Average sunshine in December
Sumoto, 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 24min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The months with the least sunshine are January and February (Average sunshine: 5h and 18min).
Average sunshine days in December
Sumoto, Japan
- Average sunshine days in December: 7.8 days
The month with the most sunshine days is May (16.1 days).
The months with the least sunshine days are August and December (7.8 days).
Average UV index in December
Sumoto, Japan
- Average UV index in December: 3
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in December
Sumoto, Japan
- Average cloud cover in December: 43
The months with the most cloud cover are January and February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Sumoto, Japan
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (10km).
The month with the lowest visibility is July (9km).
