Aioi Weather in December
Average highs run from 11°C on December 1 to 7°C on December 31, and lows from 3°C to 0°C. Normal precipitation for the month is 99 mm over about 16 wet days.
December day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
December at a glance
- Average high
- 8°C
- Average low
- 1°C
- Precipitation
- 99 mm
- Reanalysis high
- 21°CDec 4, 2018
- Reanalysis low
- -4°CDec 22, 2005
- Daylight
- 10 h 00 min to 9 h 52 min
- Cloud cover
- 81%
- Humidity
- 86%
- Dew point
- 2°C
- Wind
- 13.3 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Reanalysis high | Reanalysis low | Chance wet |
|---|---|---|---|---|---|
| Dec 1 | 11°C | 3°C | 15°C 1994 | -2°C 1996 | 47% |
| Dec 2 | 11°C | 3°C | 16°C 2010 | -1°C 1997 | 48% |
| Dec 3 | 11°C | 3°C | 17°C 2010 | -1°C 1996 | 48% |
| Dec 4 | 11°C | 3°C | 21°C 2018 | -1°C 2006 | 49% |
| Dec 5 | 10°C | 3°C | 20°C 2004 | -2°C 2005 | 50% |
| Dec 6 | 10°C | 3°C | 17°C 2003 | -3°C 2012 | 50% |
| Dec 7 | 10°C | 2°C | 16°C 1997 | -3°C 2008 | 52% |
| Dec 8 | 10°C | 2°C | 14°C 1992 | -2°C 2012 | 53% |
| Dec 9 | 9°C | 2°C | 14°C 2000 | -1°C 2012 | 53% |
| Dec 10 | 9°C | 2°C | 15°C 2004 | -2°C 1997 | 54% |
| Dec 11 | 9°C | 2°C | 17°C 2015 | -3°C 1997 | 54% |
| Dec 12 | 9°C | 2°C | 14°C 1994 | -2°C 2017 | 53% |
| Dec 13 | 8°C | 1°C | 14°C 2001 | -2°C 2012 | 53% |
| Dec 14 | 8°C | 1°C | 13°C 2015 | -3°C 2005 | 54% |
| Dec 15 | 8°C | 1°C | 15°C 2012 | -3°C 2005 | 53% |
| Dec 16 | 8°C | 1°C | 14°C 2002 | -3°C 1994 | 54% |
| Dec 17 | 8°C | 1°C | 16°C 1991 | -3°C 2014 | 53% |
| Dec 18 | 8°C | 1°C | 13°C 2004 | -4°C 2005 | 54% |
| Dec 19 | 8°C | 1°C | 14°C 1998 | -4°C 2014 | 55% |
| Dec 20 | 8°C | 1°C | 15°C 2004 | -2°C 1994 | 55% |
| Dec 21 | 8°C | 1°C | 15°C 2008 | -3°C 2005 | 55% |
| Dec 22 | 8°C | 1°C | 16°C 2016 | -4°C 2005 | 55% |
| Dec 23 | 7°C | 1°C | 15°C 1991 | -2°C 2012 | 55% |
| Dec 24 | 7°C | 1°C | 15°C 1991 | -4°C 2012 | 56% |
| Dec 25 | 7°C | 1°C | 13°C 2003 | -4°C 2012 | 55% |
| Dec 26 | 7°C | 0°C | 12°C 1993 | -3°C 2012 | 54% |
| Dec 27 | 7°C | 0°C | 13°C 2016 | -4°C 1995 | 54% |
| Dec 28 | 7°C | 0°C | 13°C 2007 | -3°C 1995 | 55% |
| Dec 29 | 7°C | 0°C | 13°C 2007 | -3°C 2013 | 54% |
| Dec 30 | 7°C | 0°C | 12°C 2019 | -2°C 2013 | 55% |
| Dec 31 | 7°C | 0°C | 13°C 1996 | -4°C 1995 | 55% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+9).
- December 1
- sunrise 6:51 AM, sunset 4:51 PM
- December 31
- sunrise 7:09 AM, sunset 5:01 PM
Other months
Sources
Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.