Aso climate

Aso Weather in September

NASA POWER reanalysis for the half-degree grid cell around Aso, 1991-2020; a grid cell is an area average and can differ from a thermometer in town by several degrees

Average highs run from 27°C on September 1 to 23°C on September 30, and lows from 19°C to 14°C. Normal precipitation for the month is 216 mm over about 15 wet days.

September day by day

The normal high and low for each date, in °C.

Normal daily high and low temperature at Aso, in °C, with the record for each date.010203040151015202530
  • Normal low
  • Normal high
  • Reanalysis extreme high
  • Reanalysis extreme low

September at a glance

Average high
25°C
Average low
17°C
Precipitation
216 mm
Reanalysis high
32°CSep 2, 2010
Reanalysis low
7°CSep 29, 1997
Daylight
12 h 51 min to 11 h 53 min
Cloud cover
69%
Humidity
86%
Dew point
18°C
Wind
9.0 km/h

Every day of the month

A wet day has at least 1 mm of precipitation in the reanalysis.

DateNormal highNormal lowReanalysis highReanalysis lowChance wet
Sep 127°C19°C32°C 199416°C 201761%
Sep 227°C19°C32°C 201015°C 201759%
Sep 327°C19°C32°C 199215°C 201758%
Sep 427°C19°C30°C 201015°C 201357%
Sep 527°C19°C31°C 200314°C 201356%
Sep 627°C19°C31°C 200715°C 201155%
Sep 727°C19°C30°C 200315°C 199354%
Sep 827°C18°C31°C 200315°C 201154%
Sep 926°C18°C31°C 201914°C 200953%
Sep 1026°C18°C32°C 201912°C 200953%
Sep 1126°C18°C30°C 201912°C 199551%
Sep 1226°C18°C30°C 200511°C 199549%
Sep 1326°C18°C31°C 201313°C 201548%
Sep 1426°C17°C29°C 201813°C 201546%
Sep 1525°C17°C29°C 199813°C 200945%
Sep 1625°C17°C29°C 201611°C 200945%
Sep 1725°C17°C29°C 200510°C 201346%
Sep 1825°C17°C29°C 200710°C 200044%
Sep 1925°C16°C29°C 200710°C 200044%
Sep 2024°C16°C29°C 199911°C 202044%
Sep 2124°C16°C29°C 200710°C 202043%
Sep 2224°C16°C30°C 200510°C 201144%
Sep 2324°C16°C28°C 19988°C 200144%
Sep 2424°C15°C28°C 20159°C 201143%
Sep 2524°C15°C27°C 20098°C 199442%
Sep 2623°C15°C28°C 199810°C 199341%
Sep 2723°C15°C29°C 20079°C 199340%
Sep 2823°C15°C28°C 20098°C 199740%
Sep 2923°C14°C27°C 20197°C 199739%
Sep 3023°C14°C29°C 20199°C 200338%

Chance of rain

The chance of at least 1 mm of precipitation in the reanalysis on each date at Aso, in percent.0204060801102030
  • Chance of a wet day

Sunrise and sunset

Times for 2026, local time (GMT+9).

September 1
sunrise 5:50 AM, sunset 6:41 PM
September 30
sunrise 6:09 AM, sunset 6:02 PM

Every day of September: sun and moon

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.