Iwanuma Weather in December
Average highs run from 12°C on December 1 to 7°C on December 31, and lows from 8°C to 4°C. Normal precipitation for the month is 71 mm over about 12 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
- 9°C
- Average low
- 6°C
- Precipitation
- 71 mm
- Reanalysis high
- 20°CDec 5, 2004
- Reanalysis low
- -1°CDec 27, 2002
- Daylight
- 9 h 43 min to 9 h 33 min
- Cloud cover
- 64%
- Humidity
- 78%
- Dew point
- 4°C
- Wind
- 24.1 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 | 12°C | 8°C | 17°C 2014 | 3°C 2012 | 38% |
| Dec 2 | 11°C | 7°C | 17°C 2019 | 3°C 1997 | 38% |
| Dec 3 | 11°C | 7°C | 18°C 2010 | 2°C 1997 | 37% |
| Dec 4 | 11°C | 7°C | 17°C 2018 | 4°C 1998 | 38% |
| Dec 5 | 11°C | 7°C | 20°C 2004 | 4°C 2014 | 38% |
| Dec 6 | 11°C | 7°C | 15°C 2010 | 3°C 2000 | 38% |
| Dec 7 | 10°C | 7°C | 15°C 1992 | 3°C 2000 | 40% |
| Dec 8 | 10°C | 6°C | 16°C 1992 | 3°C 2002 | 40% |
| Dec 9 | 10°C | 6°C | 14°C 1999 | 3°C 2002 | 40% |
| Dec 10 | 10°C | 6°C | 15°C 2004 | 2°C 2002 | 41% |
| Dec 11 | 10°C | 6°C | 18°C 2015 | 2°C 2002 | 42% |
| Dec 12 | 9°C | 6°C | 14°C 2009 | 2°C 2000 | 42% |
| Dec 13 | 9°C | 6°C | 15°C 2010 | 2°C 2005 | 41% |
| Dec 14 | 9°C | 6°C | 14°C 2010 | 2°C 2014 | 40% |
| Dec 15 | 9°C | 5°C | 13°C 2015 | 2°C 2014 | 40% |
| Dec 16 | 9°C | 5°C | 14°C 1998 | 0°C 1994 | 42% |
| Dec 17 | 9°C | 5°C | 15°C 1996 | 1°C 2014 | 41% |
| Dec 18 | 9°C | 5°C | 16°C 1996 | 1°C 2005 | 41% |
| Dec 19 | 9°C | 5°C | 14°C 2000 | -1°C 2005 | 42% |
| Dec 20 | 9°C | 5°C | 14°C 1997 | 2°C 2020 | 43% |
| Dec 21 | 8°C | 5°C | 13°C 2008 | 1°C 2009 | 43% |
| Dec 22 | 8°C | 5°C | 16°C 2016 | 2°C 1993 | 42% |
| Dec 23 | 8°C | 5°C | 17°C 2016 | 0°C 1993 | 43% |
| Dec 24 | 8°C | 5°C | 14°C 1991 | 1°C 2012 | 43% |
| Dec 25 | 8°C | 5°C | 13°C 1996 | 0°C 1995 | 42% |
| Dec 26 | 8°C | 4°C | 15°C 2006 | 0°C 2012 | 43% |
| Dec 27 | 8°C | 4°C | 15°C 2006 | -1°C 2002 | 43% |
| Dec 28 | 8°C | 4°C | 12°C 2007 | 1°C 2005 | 43% |
| Dec 29 | 8°C | 4°C | 15°C 2007 | 2°C 2002 | 44% |
| Dec 30 | 7°C | 4°C | 12°C 2012 | 1°C 2020 | 44% |
| Dec 31 | 7°C | 4°C | 12°C 2019 | 0°C 2020 | 44% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+9).
- December 1
- sunrise 6:34 AM, sunset 4:17 PM
- December 31
- sunrise 6:53 AM, sunset 4:26 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.