Lihue, HI weather in September
In September, Lihue sees highs around 85°F and lows around 75°F: warm and oppressively humid, with rain on most days. Rain falls on about 16 days. Pack rain gear.
- Normal high
- 85°F
- Normal low
- 75°F
- Wet days
- 16
- 2.2 in total
- Muggy days
- 30
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 85°F | 85°F |
| Normal low | 75°F | 75°F |
| Chance of a wet day | 56% | 53% |
| Sunrise / sunset | 6:20 am / 6:54 pm | 6:28 am / 6:26 pm |
| Daylight | 12.6 h | 12.0 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Hawaii time (no daylight saving)).
A typical September day
- 6 am76°Fdew point 69°F
- 9 am81°Fdew point 70°F
- Noon83°Fdew point 71°F
- 3 pm83°Fdew point 70°F
- 6 pm80°Fdew point 70°F
- 9 pm78°Fdew point 70°F
NOAA hourly normals (local standard time) from Lihue WSO Airport 1020.1 (2 mi away); average wind 13 mph; clear or few clouds in 48% of daytime hours, mostly cloudy or overcast in 27%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F0 of 30
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph15 of 30
- Hot dayshigh 90°F or more0 of 30
- Muggy daysdaily mean dew point 65°F or more30 of 30
- Wet daysat least 0.01 in of rain or melted snow16 of 30
- Notable rainat least 0.10 in5 of 30
- Freezing nightslow 32°F or below0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 2.2 in; a dry September brings about 1.0 in and a wet one about 2.8 in (25th and 75th percentiles). About 1 day brings half an inch or more.
How September varies from year to year
- Warmest September, 1991-20202019: average high 89°F
- Coolest September2018: average high 82°F
- Wettest September1996: 7.8 in
- Driest September2007: 0.4 in
- Highest reading91°F (September 8, 2019)
- Lowest reading66°F (September 22, 2003)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 85°F | 85°F | 84°F |
| Normal low | 75°F | 75°F | 74°F |
| Wet days | 18 | 16 | 17 |
| Comfortable days | 0 | 0 | 0 |
| Daylight | 12.9 h | 12.3 h | 11.6 h |
Highs change by 0°F from August and -1°F into October.
Nearby alternatives in September
- Drier: Honolulu, HI107 mi · high 88°F · 7 wet days
How Lihue ranks in September
- Normal high134th warmest of 378 cities; 6th of 7 in Hawaii
- Wet days365th driest of 378
- Comfortable days342nd most of 342
What to pack for Lihue in September
- Light, breathable clothing – highs near 85°F and about 30 muggy days
- A rain jacket or umbrella – rain on about 16 days
- A swimsuit – about 15 beach days
Heating and cooling
September has 0 heating degree days and 452 cooling degree days (base 65°F), 11% of the year's total heating and cooling demand.
Questions
How hot is Lihue in September?
The normal high is 85°F and the normal low is 75°F. From 1991 to 2020 the hottest September reading was 91°F (most recently on September 8, 2019).
Does it rain a lot in Lihue in September?
About 16 days in September have at least 0.01 in of precipitation, and the normal total is 2.2 in. The wettest September in 1991-2020 was in 1996 (7.9 in); the driest was in 2007 (0.4 in).
Is September a good time to visit Lihue?
September ranks 9th of 12 months on our comfort score for Lihue (49 out of 100). It has almost no comfortable days. The best months are January, February and March.
Where the numbers come from
- Temperature, rain, frost dates, humidity and wind by hour and cloud cover: Lihue WSO Airport 1020.1 (USW00022536), 1.7 mi ENE of the city center, 100 ft (107 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Koloko Rsvr 1137 (USC00514758), 15 mi N of the city center, 490 ft (283 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Lihue Airport (911650-22536), 1.7 mi ENE of the city center, 105 ft (102 ft lower than the city). Hourly observations, 1991-2020.