Kīhei weather in September

In September, Kīhei sees average daytime highs of 84°F and overnight lows near 73°F, with 0.4 in of rain across 2.7 wet days and about 12.1 hours of daylight. It is the 1st-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 84°F through the month. The sky is clear or mostly clear about 46% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 24 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Kīhei's 5th-clearest and 12th-windiest month. For the whole year in context, see Kīhei's year-round climate.

Daytime high
84°
1st warmest
Overnight low
73°
11th coldest
Rainfall
0.4 in
2.7 wet days
Daylight
12 h 06 min
6:17 AM – 6:24 PM
Cloud cover
44%
5th clearest
Wind
5 mph
12th windiest
Solar energy
6.01 kWh/m²
Travel score
6.7
out of 10

Kīhei is census designated place in Maui County, Hawaii, United States.

Density
691/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 84°F through the month.

A typical September day in Kīhei reaches about 84°F in the afternoon and slips back to 73°F overnight — a 11°F spread between the day's warmth and the night's chill. On most days the high lands between 82°F and 86°F. Set against its neighbours, September runs on par with August and on par with October.

65°70°75°80°85°151015202530
Avg high (°F)Avg low (°F)
18473
28473
38473
48473
58473
68473
78473
88473
98473
108473
118473
128473
138473
148473
158473
168473
178473
188473
198473
208473
218473
228473
238473
248473
258473
268473
278473
288373
298373
308373

Kīhei weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan77° / 67°1.75.410.98.0
Feb76° / 67°1.3511.37.9
Mar77° / 67°1.85.711.97.7
Apr79° / 69°0.83.612.57.7
May80° / 70°0.63.9137.6
Jun82° / 72°0.31.813.27.5
Jul83° / 73°0.42.613.16.9
Aug84° / 73°0.52.712.76.7
Sep84° / 73°0.42.712.16.7
Oct83° / 72°0.83.711.57.0
Nov80° / 71°0.93.8117.6
Dec78° / 68°1.84.310.88.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 31% of September, with mostly cloudy or overcast conditions the remaining 23%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17723
27822
37822
47921
57921
67921
77921
87921
97921
107921
117921
128020
138020
147921
157921
167921
177921
187921
197723
207723
217723
227624
237624
247525
257327
267327
277228
287129
297129
307030

Chance of precipitation in September

Any precipitation

Kīhei gets around 0.4 in of rain over 2.7 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 9% and peaks near 10% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
19
29
39
49
59
69
79
89
99
109
119
129
139
149
159
169
179
189
199
209
219
229
239
249
2510
2610
2710
2810
2910
3010

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the muggy band about 68% of days. Sticky, muggy-or-worse air turns up on roughly 76% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
1236611
2236611
3246511
4246511
5246511
6246610
7246610
8246610
9246610
1024679
1123689
1223689
1323698
1423698
1523698
1623698
1723698
1823698
1923698
2023707
2124697
2224697
2324697
2424697
2525687
2625687
2725696
2826686
2926686
3026686

Wind in September

Winds average 5 mph in September, the calmest month.

Across September, daily wind ranges from about 5 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 24 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over September. Sunrise moves from 6:13 AM to 6:20 AM, and sunset from 6:38 PM to 6:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:136:38
212.46:136:37
312.46:136:36
412.46:146:35
512.36:146:34
612.36:146:33
712.36:146:32
812.36:156:31
912.36:156:30
1012.26:156:29
1112.26:156:29
1212.26:166:28
1312.26:166:27
1412.26:166:26
1512.16:166:25
1612.16:176:24
1712.16:176:23
1812.16:176:22
1912.16:176:21
2012.06:186:20
2112.06:186:19
2212.06:186:18
2312.06:186:17
2412.06:196:16
2511.96:196:15
2611.96:196:14
2711.96:196:13
2811.96:206:12
2911.96:206:11
3011.86:206:10

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.01 kWh/m².

For context, solar energy here swings from a low near 4.12 kWh/m² to a high of 6.68 kWh/m² in June across the year — September's 6.01 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.2Intense
46.2Intense
56.2Intense
66.2Intense
76.2Intense
86.2Intense
96.1Intense
106.1Intense
116.1Intense
126.1Intense
136.0Intense
146.0Intense
156.0Intense
166.0Bright
176.0Bright
185.9Bright
195.9Bright
205.9Bright
215.9Bright
225.9Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in September

Hazard calendar for Kīhei

In seasonPeak

In September, Kīhei sits inside its pacific hurricane season. The full year is below, with each hazard's peak months called out.

Kīhei sits in the eastern Pacific hurricane zone; the season peaks August–September.

Pacific hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Kīhei?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.7
Sightseeing
11th-best month of the year
8.4
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Kīhei for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Kīhei in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Kīhei sees daytime highs around 84°F and nights near 73°F. Pack light clothes and sun protection.

light clothessun protection

Sea temperature near Kīhei in September

The nearest coast averages about 80°F in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 9 mi away) is warmest in September at about 80°F and coldest in February near 75°F.

The water stays above 68°F all year — warm enough for a swim any month.

74°76°78°80°82°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmcomfortable to swim
Sea temperature (°F)Comfort
Jan76Warm
Feb75Warm
Mar75Warm
Apr76Warm
May77Warm
Jun78Warm
Jul78Warm
Aug80Warm
Sep80Warm
Oct80Warm
Nov79Warm
Dec77Warm

UV index in Kīhei in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Kīhei peaks around July 22 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 6 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highHighJul 22UV 12Dec 17UV 6
UV index (midday)Level
Jan7High
Feb9Very high
Mar11Extreme
Apr13Extreme
May10Extreme
Jun11Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct10Very high
Nov7High
Dec6High
Location & terrain

Where is Kīhei?

Kīhei sits at 20.8°N, 156.4°W, 10 ft above sea level, in United States. The nearest listed city is Kahului, 8.7 mi away.

Topography around Kīhei

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Kīhei.

Within 2 miles, the terrain around Kīhei has only modest variations in elevation — a maximum elevation change of 528 ft around an average of 151 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 7,051 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 9,977 ft.

The land around Kīhei is covered by grassland (52%) and water (22%) within 2 miles, grassland (53%) and water (30%) within 10 miles, and water (83%) within 50 miles.

2 miles
528 ft
10 miles
7,051 ft
50 miles
9,977 ft
treesshrubsgrasslandartificial surfacesbare terrainwater
September weather nearby: Kahului 8.7 mi · Wailuku 9.3 mi · Lahaina 17 mi · Hawai‘i Kai 89 mi · East Honolulu 89 mi · Niu Valley 91 mi · Kuliouou - Kalani Iki 91 mi · Kaimukī 94 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Kīhei (20.7646°, -156.4458°, elevation 10 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).