Hawaii County Weather in September
Average highs run from 57°F on September 1 to 57°F on September 30, and lows from 41°F to 40°F. Normal precipitation for the month is 0.67 in over about 5 wet days.
September day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 57°F
- Average low
- 41°F
- Precipitation
- 0.67 in
- Record high
- 67°FSep 27, 2009
- Record low
- 33°FSep 2, 2011
- Chance of a freeze
- 0%
- Daylight
- 12 h 30 min to 11 h 58 min
- Cloud cover
- 55%
- Humidity
- 80%
- Dew point
- 61°F
- Wind
- 5.4 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Sep 1 | 57°F | 41°F | 65°F 2009 | 37°F 2007 | 18% |
| Sep 2 | 57°F | 41°F | 64°F 2013 | 33°F 2011 | 17% |
| Sep 3 | 57°F | 41°F | 66°F 2021 | 35°F 2011 | 17% |
| Sep 4 | 57°F | 41°F | 61°F 2008 | 39°F 2018 | 17% |
| Sep 5 | 57°F | 41°F | 61°F 2014 | 37°F 2006 | 17% |
| Sep 6 | 57°F | 41°F | 62°F 2020 | 35°F 2007 | 17% |
| Sep 7 | 57°F | 41°F | 66°F 2024 | 36°F 2007 | 17% |
| Sep 8 | 57°F | 41°F | 63°F 2009 | 34°F 2012 | 17% |
| Sep 9 | 57°F | 41°F | 62°F 2009 | 35°F 2007 | 17% |
| Sep 10 | 56°F | 41°F | 63°F 2010 | 34°F 2007 | 17% |
| Sep 11 | 56°F | 41°F | 62°F 2023 | 36°F 2022 | 17% |
| Sep 12 | 56°F | 41°F | 64°F 2025 | 36°F 2008 | 17% |
| Sep 13 | 56°F | 41°F | 64°F 2023 | 37°F 2011 | 17% |
| Sep 14 | 56°F | 41°F | 64°F 2010 | 37°F 2018 | 16% |
| Sep 15 | 56°F | 41°F | 62°F 2010 | 37°F 2011 | 16% |
| Sep 16 | 56°F | 41°F | 64°F 2010 | 36°F 2011 | 16% |
| Sep 17 | 56°F | 41°F | 65°F 2010 | 38°F 2015 | 16% |
| Sep 18 | 56°F | 41°F | 66°F 2021 | 36°F 2007 | 16% |
| Sep 19 | 56°F | 41°F | 62°F 2006 | 35°F 2007 | 16% |
| Sep 20 | 57°F | 41°F | 61°F 2013 | 36°F 2008 | 16% |
| Sep 21 | 57°F | 41°F | 65°F 2013 | 38°F 2008 | 16% |
| Sep 22 | 57°F | 41°F | 63°F 2018 | 37°F 2008 | 16% |
| Sep 23 | 57°F | 41°F | 66°F 2021 | 35°F 2024 | 16% |
| Sep 24 | 57°F | 41°F | 65°F 2021 | 35°F 2017 | 16% |
| Sep 25 | 57°F | 41°F | 61°F 2023 | 37°F 2006 | 16% |
| Sep 26 | 57°F | 41°F | 65°F 2023 | 37°F 2017 | 16% |
| Sep 27 | 57°F | 40°F | 67°F 2009 | 37°F 2016 | 16% |
| Sep 28 | 57°F | 40°F | 63°F 2013 | 37°F 2016 | 16% |
| Sep 29 | 57°F | 40°F | 61°F 2024 | 36°F 2016 | 16% |
| Sep 30 | 57°F | 40°F | 63°F 2024 | 34°F 2010 | 16% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (HST).
- September 1
- sunrise 6:07 AM, sunset 6:37 PM
- September 30
- sunrise 6:13 AM, sunset 6:11 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00021514 (Mauna Loa 5 Nne), public domain. Records: NOAA GHCN-Daily, station USW00021514, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: 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.