Iwamizawa Weather in May
Average highs run from 13°C on May 1 to 18°C on May 31, and lows from 3°C to 8°C. Normal precipitation for the month is 87 mm over about 12 wet days.
May day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
May at a glance
- Average high
- 16°C
- Average low
- 5°C
- Precipitation
- 87 mm
- Reanalysis high
- 29°CMay 27, 2019
- Reanalysis low
- -3°CMay 8, 2013
- Daylight
- 14 h 07 min to 15 h 08 min
- Cloud cover
- 71%
- Humidity
- 82%
- Dew point
- 7°C
- Wind
- 15.5 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 |
|---|---|---|---|---|---|
| May 1 | 13°C | 3°C | 19°C 2008 | -3°C 2016 | 39% |
| May 2 | 13°C | 3°C | 22°C 2008 | -1°C 2001 | 38% |
| May 3 | 13°C | 3°C | 23°C 2020 | -2°C 2006 | 38% |
| May 4 | 13°C | 3°C | 21°C 2019 | -3°C 1991 | 39% |
| May 5 | 14°C | 3°C | 21°C 2019 | 0°C 1992 | 38% |
| May 6 | 14°C | 3°C | 21°C 1991 | -1°C 2005 | 39% |
| May 7 | 14°C | 4°C | 20°C 1991 | -3°C 2013 | 39% |
| May 8 | 14°C | 4°C | 19°C 2009 | -3°C 2013 | 40% |
| May 9 | 14°C | 4°C | 20°C 2002 | -1°C 2008 | 42% |
| May 10 | 15°C | 4°C | 18°C 1991 | -3°C 2008 | 41% |
| May 11 | 15°C | 4°C | 24°C 2014 | -1°C 2008 | 41% |
| May 12 | 15°C | 4°C | 21°C 2014 | 0°C 2005 | 40% |
| May 13 | 15°C | 5°C | 20°C 2001 | 0°C 2008 | 40% |
| May 14 | 15°C | 5°C | 22°C 2001 | 0°C 2008 | 39% |
| May 15 | 15°C | 5°C | 22°C 2001 | -2°C 2009 | 37% |
| May 16 | 16°C | 5°C | 24°C 1998 | 0°C 1996 | 37% |
| May 17 | 16°C | 6°C | 20°C 2006 | -1°C 1996 | 37% |
| May 18 | 16°C | 6°C | 23°C 2006 | 1°C 1996 | 37% |
| May 19 | 16°C | 6°C | 21°C 2000 | 2°C 1994 | 36% |
| May 20 | 16°C | 6°C | 23°C 2017 | 2°C 1994 | 37% |
| May 21 | 17°C | 6°C | 23°C 2009 | 2°C 2020 | 36% |
| May 22 | 17°C | 7°C | 25°C 2016 | 2°C 2020 | 35% |
| May 23 | 17°C | 7°C | 23°C 2016 | 3°C 2014 | 33% |
| May 24 | 17°C | 7°C | 23°C 1994 | 3°C 2006 | 33% |
| May 25 | 18°C | 7°C | 24°C 1994 | 2°C 2006 | 33% |
| May 26 | 18°C | 7°C | 27°C 2019 | 3°C 2002 | 33% |
| May 27 | 18°C | 7°C | 29°C 2019 | 4°C 1993 | 33% |
| May 28 | 18°C | 8°C | 22°C 2013 | 2°C 1993 | 34% |
| May 29 | 18°C | 8°C | 23°C 2003 | 2°C 2010 | 34% |
| May 30 | 18°C | 8°C | 25°C 2020 | 3°C 2011 | 34% |
| May 31 | 18°C | 8°C | 24°C 2020 | 0°C 2011 | 33% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+9).
- May 1
- sunrise 4:27 AM, sunset 6:34 PM
- May 31
- sunrise 3:57 AM, sunset 7:05 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.