Karatsu Weather in September
Average highs run from 28°C on September 1 to 24°C on September 30, and lows from 24°C to 20°C. Normal precipitation for the month is 186 mm over about 12 wet days.
September day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
September at a glance
- Average high
- 26°C
- Average low
- 22°C
- Precipitation
- 186 mm
- Reanalysis high
- 33°CSep 4, 2010
- Reanalysis low
- 16°CSep 28, 1992
- Daylight
- 12 h 52 min to 11 h 54 min
- Cloud cover
- 67%
- Humidity
- 81%
- Dew point
- 20°C
- Wind
- 16.2 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 |
|---|---|---|---|---|---|
| Sep 1 | 28°C | 24°C | 32°C 2005 | 21°C 2019 | 54% |
| Sep 2 | 28°C | 24°C | 31°C 2018 | 22°C 1991 | 53% |
| Sep 3 | 28°C | 24°C | 32°C 2010 | 21°C 2013 | 52% |
| Sep 4 | 28°C | 24°C | 33°C 2010 | 20°C 1993 | 51% |
| Sep 5 | 28°C | 24°C | 30°C 2003 | 19°C 1993 | 51% |
| Sep 6 | 28°C | 23°C | 30°C 2007 | 20°C 1993 | 50% |
| Sep 7 | 28°C | 23°C | 32°C 2003 | 21°C 1993 | 49% |
| Sep 8 | 28°C | 23°C | 31°C 2006 | 21°C 1993 | 50% |
| Sep 9 | 27°C | 23°C | 31°C 2019 | 21°C 1993 | 49% |
| Sep 10 | 27°C | 23°C | 32°C 2019 | 20°C 2015 | 49% |
| Sep 11 | 27°C | 23°C | 31°C 2011 | 19°C 1993 | 47% |
| Sep 12 | 27°C | 23°C | 30°C 2003 | 19°C 1992 | 44% |
| Sep 13 | 27°C | 23°C | 30°C 2013 | 19°C 2015 | 43% |
| Sep 14 | 27°C | 22°C | 31°C 2011 | 19°C 2015 | 42% |
| Sep 15 | 27°C | 22°C | 31°C 2011 | 20°C 2015 | 41% |
| Sep 16 | 26°C | 22°C | 29°C 1993 | 20°C 2009 | 41% |
| Sep 17 | 26°C | 22°C | 30°C 2011 | 19°C 2013 | 41% |
| Sep 18 | 26°C | 22°C | 31°C 2007 | 18°C 1995 | 40% |
| Sep 19 | 26°C | 21°C | 31°C 2007 | 17°C 1995 | 38% |
| Sep 20 | 26°C | 21°C | 31°C 1998 | 18°C 1995 | 37% |
| Sep 21 | 26°C | 21°C | 31°C 2007 | 18°C 1995 | 36% |
| Sep 22 | 25°C | 21°C | 30°C 2007 | 17°C 2001 | 37% |
| Sep 23 | 25°C | 21°C | 28°C 2013 | 16°C 2001 | 37% |
| Sep 24 | 25°C | 21°C | 28°C 2013 | 18°C 2011 | 37% |
| Sep 25 | 25°C | 21°C | 28°C 2008 | 18°C 1994 | 36% |
| Sep 26 | 25°C | 20°C | 31°C 2016 | 18°C 1994 | 35% |
| Sep 27 | 25°C | 20°C | 29°C 2016 | 17°C 1993 | 35% |
| Sep 28 | 24°C | 20°C | 28°C 2019 | 16°C 1992 | 34% |
| Sep 29 | 24°C | 20°C | 27°C 1999 | 18°C 1995 | 33% |
| Sep 30 | 24°C | 20°C | 29°C 2005 | 17°C 2003 | 32% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+9).
- September 1
- sunrise 5:54 AM, sunset 6:46 PM
- September 30
- sunrise 6:13 AM, sunset 6:07 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.