Climate and average weather in Kīhei
In Kīhei, the weather is humid, hot, fairly dry, and mostly clear and remarkably steady, with daytime highs holding near hot levels all year. The wettest stretch peaks around December.
Over the course of the year, the temperature in Kīhei typically varies from 67°F to 84°F, and is rarely below 63°F or above 86°F. August is the hottest month of the year, while February is the coldest.
Based on the travel score, the best time of year to visit Kīhei for warm-weather activities is from early January to late December.
- Hottest
- Aug
- 84°
- Coldest
- Feb
- 67°
- Wettest
- Dec
- 1.8 in
- Driest
- Jun
- 0.3 in
- Rain / yr
- 11.2 in
- 45 wet days
- Daylight
- 10.7–13.3 h
- shortest–longest
- Elevation
- 10 ft
- 20.8°N
- Clearest
- Jan
- 39% cloud
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.
Kīhei weather by month, at a glance
The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.
Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around early January to late December.
Temperature through the year
Daily average highs and lows in Kīhei, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
Temperatures in Kīhei stay fairly even through the year, without a distinct hot or cool season. The warmest month is August, with an average high of 84°F and low of 73°F; the coolest is February, with an average low of 67°F and high of 76°F.
Days typically run about 10°F warmer than nights year-round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 77 | 76 | 77 | 79 | 80 | 82 | 83 | 84 | 84 | 83 | 80 | 78 |
| Avg low (°F) | 67 | 67 | 67 | 69 | 70 | 72 | 73 | 73 | 73 | 72 | 71 | 68 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| Jan | 77 | 67 |
| Feb | 76 | 67 |
| Mar | 77 | 67 |
| Apr | 79 | 69 |
| May | 80 | 70 |
| Jun | 82 | 72 |
| Jul | 83 | 73 |
| Aug | 84 | 73 |
| Sep | 84 | 73 |
| Oct | 83 | 72 |
| Nov | 80 | 71 |
| Dec | 78 | 68 |
Average hourly temperature in Kīhei
A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on August afternoons, near 84°F, and coldest before dawn in February, near 67°F.
Kīhei weather by month
Every month at a glance. Click a month for its detailed page.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 77° / 67° | 1.7 | 5.4 | 10.9 | 8.0 |
| Feb | 76° / 67° | 1.3 | 5 | 11.3 | 7.9 |
| Mar | 77° / 67° | 1.8 | 5.7 | 11.9 | 7.7 |
| Apr | 79° / 69° | 0.8 | 3.6 | 12.5 | 7.7 |
| May | 80° / 70° | 0.6 | 3.9 | 13 | 7.6 |
| Jun | 82° / 72° | 0.3 | 1.8 | 13.2 | 7.5 |
| Jul | 83° / 73° | 0.4 | 2.6 | 13.1 | 6.9 |
| Aug | 84° / 73° | 0.5 | 2.7 | 12.7 | 6.7 |
| Sep | 84° / 73° | 0.4 | 2.7 | 12.1 | 6.7 |
| Oct | 83° / 72° | 0.8 | 3.7 | 11.5 | 7.0 |
| Nov | 80° / 71° | 0.9 | 3.8 | 11 | 7.6 |
| Dec | 78° / 68° | 1.8 | 4.3 | 10.8 | 8.0 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Kīhei gets about 11.2 in of precipitation a year. On a typical day the chance of rain is mostly dry, but that rises and falls sharply with the seasons.
The wetter season lasts 3.8 months, from around Dec 16 to Apr 10, peaking in February at about 20% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jun 16.
December is the wettest month by volume, with 1.8 in over about 4 wet days; June is the driest, with 0.3 in.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 18 | 18 | 18 | 13 | 13 | 6 | 8 | 9 | 9 | 12 | 12 | 14 |
| Rain days | 5 | 5 | 6 | 4 | 4 | 2 | 3 | 3 | 3 | 4 | 4 | 4 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 18 | 5 |
| Feb | 18 | 5 |
| Mar | 18 | 6 |
| Apr | 13 | 4 |
| May | 13 | 4 |
| Jun | 6 | 2 |
| Jul | 8 | 3 |
| Aug | 9 | 3 |
| Sep | 9 | 3 |
| Oct | 12 | 4 |
| Nov | 12 | 4 |
| Dec | 14 | 4 |
Monthly rainfall
Over a full year, Kīhei collects about 11.2 in of rain across 45 wet days — roughly 0.9 in in an average month.
It doesn’t fall evenly. December is the wettest month with 1.8 in, while June is the driest at just 0.3 in. The three wettest months alone bring about 47% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (in) | 1.7 | 1.3 | 1.8 | 0.8 | 0.6 | 0.3 | 0.4 | 0.5 | 0.4 | 0.8 | 0.9 | 1.8 |
| Rain days | 5 | 5 | 6 | 4 | 4 | 2 | 3 | 3 | 3 | 4 | 4 | 4 |
| Rainfall (in) | Rain days | |
|---|---|---|
| Jan | 1.7 | 5 |
| Feb | 1.3 | 5 |
| Mar | 1.8 | 6 |
| Apr | 0.8 | 4 |
| May | 0.6 | 4 |
| Jun | 0.3 | 2 |
| Jul | 0.4 | 3 |
| Aug | 0.5 | 3 |
| Sep | 0.4 | 3 |
| Oct | 0.8 | 4 |
| Nov | 0.9 | 4 |
| Dec | 1.8 | 4 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Kīhei, the average share of the sky covered by clouds shows moderate seasonal variation over the course of the year.
The clearer part of the year begins around July 6 and lasts for 2.8 months, ending around September 27. The clearest month is August, when the sky is clear, mostly clear, or partly cloudy 79% of the time on average.
The cloudier part of the year begins around February 23 and lasts for 3.1 months, ending around May 26. The cloudiest month is March, when it is overcast or mostly cloudy 35% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 79 | 75 | 65 | 65 | 68 | 73 | 75 | 79 | 77 | 66 | 69 | 74 |
| Cloudier (%) | 21 | 25 | 35 | 35 | 32 | 27 | 25 | 21 | 23 | 34 | 31 | 26 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 79 | 21 |
| Feb | 75 | 25 |
| Mar | 65 | 35 |
| Apr | 65 | 35 |
| May | 68 | 32 |
| Jun | 73 | 27 |
| Jul | 75 | 25 |
| Aug | 79 | 21 |
| Sep | 77 | 23 |
| Oct | 66 | 34 |
| Nov | 69 | 31 |
| Dec | 74 | 26 |
Daylight, sunrise and sunset
Hours of daylight through the year, with sunrise and sunset times.
The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around June 16, brings about 13 h 18 min of light; the shortest, around December 15, only 10 h 42 min — a swing of roughly 2 h 36 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 10.9 | 11.3 | 11.9 | 12.5 | 13.0 | 13.2 | 13.1 | 12.7 | 12.1 | 11.5 | 11.0 | 10.8 |
| Sunrise (AM) | 7:09 | 7:02 | 6:40 | 6:12 | 5:52 | 5:48 | 5:57 | 6:08 | 6:17 | 6:25 | 6:41 | 7:00 |
| Sunset (PM) | 6:01 | 6:19 | 6:31 | 6:40 | 6:52 | 7:04 | 7:06 | 6:51 | 6:24 | 5:56 | 5:41 | 5:44 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 10.9 | 7:09 | 6:01 |
| Feb | 11.3 | 7:02 | 6:19 |
| Mar | 11.9 | 6:40 | 6:31 |
| Apr | 12.5 | 6:12 | 6:40 |
| May | 13.0 | 5:52 | 6:52 |
| Jun | 13.2 | 5:48 | 7:04 |
| Jul | 13.1 | 5:57 | 7:06 |
| Aug | 12.7 | 6:08 | 6:51 |
| Sep | 12.1 | 6:17 | 6:24 |
| Oct | 11.5 | 6:25 | 5:56 |
| Nov | 11.0 | 6:41 | 5:41 |
| Dec | 10.8 | 7:00 | 5:44 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Kīhei averages about 14 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 11 and 18 days.
The sunnier stretch runs 2.9 months, from around Dec 1 to Feb 27. The sunniest month is January, with roughly 18 sunny days (bright).
The greyest month is May, down near 12 sunny days — about 33% fewer than the January peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 18 | 15 | 13 | 12 | 12 | 12 | 13 | 15 | 14 | 13 | 14 | 17 |
| Sky | Bright | Bright | Mixed | Mixed | Mixed | Mixed | Mixed | Bright | Mixed | Mixed | Mixed | Bright |
| Sunny days | Sky | |
|---|---|---|
| Jan | 18 | Bright |
| Feb | 15 | Bright |
| Mar | 13 | Mixed |
| Apr | 12 | Mixed |
| May | 12 | Mixed |
| Jun | 12 | Mixed |
| Jul | 13 | Mixed |
| Aug | 15 | Bright |
| Sep | 14 | Mixed |
| Oct | 13 | Mixed |
| Nov | 14 | Mixed |
| Dec | 17 | Bright |
Humidity comfort
Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.
Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.
In Kīhei, how humid it feels changes dramatically over the year.
The more humid part of the year lasts 6.9 months, from around May 9 to December 4. The muggiest month is June, when the air feels humid, muggy or worse about 100% of the time.
The most comfortable stretch runs from around December 5 to May 8, and February is the most comfortable month — the air is dry or comfortable 37% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 4 | 9 | 5 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Comfortable (%) | 25 | 28 | 25 | 17 | 8 | 0 | 0 | 0 | 0 | 0 | 5 | 14 |
| Humid (%) | 56 | 48 | 54 | 66 | 64 | 54 | 31 | 21 | 24 | 30 | 44 | 60 |
| Muggy (%) | 15 | 15 | 16 | 15 | 28 | 46 | 65 | 69 | 68 | 65 | 48 | 25 |
| Oppressive (%) | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 10 | 8 | 6 | 3 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| Jan | 4 | 25 | 56 | 15 | 0 |
| Feb | 9 | 28 | 48 | 15 | 0 |
| Mar | 5 | 25 | 54 | 16 | 0 |
| Apr | 1 | 17 | 66 | 15 | 0 |
| May | 0 | 8 | 64 | 28 | 0 |
| Jun | 0 | 0 | 54 | 46 | 0 |
| Jul | 0 | 0 | 31 | 65 | 4 |
| Aug | 0 | 0 | 21 | 69 | 10 |
| Sep | 0 | 0 | 24 | 68 | 8 |
| Oct | 0 | 0 | 30 | 65 | 6 |
| Nov | 0 | 5 | 44 | 48 | 3 |
| Dec | 1 | 14 | 60 | 25 | 0 |
Wind
Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.
This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.
Wind in Kīhei is steady company: average speeds sit near 6 mph — calm — in every month of the year, with no meaningful windy or calm season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 6 | 6 | 7 | 7 | 6 | 6 | 6 | 6 | 5 | 5 | 6 | 6 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (mph) | Feels | |
|---|---|---|
| Jan | 6 | calm |
| Feb | 6 | calm |
| Mar | 7 | calm |
| Apr | 7 | calm |
| May | 6 | calm |
| Jun | 6 | calm |
| Jul | 6 | calm |
| Aug | 6 | calm |
| Sep | 5 | calm |
| Oct | 5 | calm |
| Nov | 6 | calm |
| Dec | 6 | calm |
Hazard calendar for Kīhei
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Kīhei sits in the eastern Pacific hurricane zone; the season peaks August–September.
Best time to visit Kīhei
To characterize how pleasant the weather is in Kīhei throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around late December, Kīhei is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.
Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.
The travel score favors clear, rainless days with daytime highs between 64°F and 82°F. Based on this score, Kīhei suits general outdoor tourist activities for most of the year, with a peak score in the second week of January.
The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel score (0–10) | 8.0 | 7.9 | 7.7 | 7.7 | 7.6 | 7.5 | 6.9 | 6.7 | 6.7 | 7.0 | 7.6 | 7.9 |
| Rating | ideal | ideal | ideal | ideal | ideal | good | good | good | good | good | ideal | ideal |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 8.0 | ideal |
| Feb | 7.9 | ideal |
| Mar | 7.7 | ideal |
| Apr | 7.7 | ideal |
| May | 7.6 | ideal |
| Jun | 7.5 | good |
| Jul | 6.9 | good |
| Aug | 6.7 | good |
| Sep | 6.7 | good |
| Oct | 7.0 | good |
| Nov | 7.6 | ideal |
| Dec | 7.9 | ideal |
The beach/pool score favors clear, rainless days with daytime highs between 75°F and 93°F. Based on this score, Kīhei suits hot-weather activities for most of the year, with a peak score in the third week of August.
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
What to pack for Kīhei, by month
Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.
Kīhei packs about the same all year — highs hold near 84°F. Across the year the things worth having are light clothes and sun protection.
In August, Kīhei sees daytime highs around 84°F and nights near 73°F. Pack light clothes and sun protection.
Sea temperature near Kīhei
Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.
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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 76 | 75 | 75 | 76 | 77 | 78 | 78 | 80 | 80 | 80 | 79 | 77 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 76 | Warm |
| Feb | 75 | Warm |
| Mar | 75 | Warm |
| Apr | 76 | Warm |
| May | 77 | Warm |
| Jun | 78 | Warm |
| Jul | 78 | Warm |
| Aug | 80 | Warm |
| Sep | 80 | Warm |
| Oct | 80 | Warm |
| Nov | 79 | Warm |
| Dec | 77 | Warm |
UV index (midday) in Kīhei by month
Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.
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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 7 | 9 | 11 | 13 | 10 | 11 | 12 | 12 | 12 | 10 | 7 | 6 |
| Level | High | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | High | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 7 | High |
| Feb | 9 | Very high |
| Mar | 11 | Extreme |
| Apr | 13 | Extreme |
| May | 10 | Extreme |
| Jun | 11 | Extreme |
| Jul | 12 | Extreme |
| Aug | 12 | Extreme |
| Sep | 12 | Extreme |
| Oct | 10 | Very high |
| Nov | 7 | High |
| Dec | 6 | High |
Average hourly UV index in Kīhei
Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.
The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
UV falls off far faster than brightness as the sun drops, so even in April the burn window is concentrated in the middle of the day: about 8 hours a day reach index 3 (protection recommended), and 6 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV ≥ 3 (h/day) | 6 | 6.5 | 7.5 | 8 | 8 | 8.5 | 8.5 | 8.5 | 8 | 7 | 6 | 5.5 |
| UV ≥ 6 (h/day) | 2.5 | 4.5 | 5.5 | 6 | 5.5 | 6 | 6.5 | 6.5 | 6 | 5 | 3 | 1 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 6 | 2.5 |
| Feb | 6.5 | 4.5 |
| Mar | 7.5 | 5.5 |
| Apr | 8 | 6 |
| May | 8 | 5.5 |
| Jun | 8.5 | 6 |
| Jul | 8.5 | 6.5 |
| Aug | 8.5 | 6.5 |
| Sep | 8 | 6 |
| Oct | 7 | 5 |
| Nov | 6 | 3 |
| Dec | 5.5 | 1 |
Growing season
Kīhei is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Frost nights | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 100 | 0 |
| Feb | 100 | 0 |
| Mar | 100 | 0 |
| Apr | 100 | 0 |
| May | 100 | 0 |
| Jun | 100 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 100 | 0 |
| Oct | 100 | 0 |
| Nov | 100 | 0 |
| Dec | 100 | 0 |
Growing degree days
Growing degree days tally heat above 50°F: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Kīhei banks about 9,197 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around August.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°F·days) | 672 | 602 | 687 | 707 | 781 | 809 | 866 | 888 | 854 | 854 | 760 | 716 |
| Growing degree days (°F·days) | |
|---|---|
| Jan | 672 |
| Feb | 602 |
| Mar | 687 |
| Apr | 707 |
| May | 781 |
| Jun | 809 |
| Jul | 866 |
| Aug | 888 |
| Sep | 854 |
| Oct | 854 |
| Nov | 760 |
| Dec | 716 |
Solar energy
Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.
Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.
Kīhei receives about 5.6 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 4.0 and 6.7 kWh/m².
The brighter stretch of the year lasts 6.6 months, from around Mar 17 to Oct 2. The brightest month is June, averaging about 6.7 kWh/m² (intense).
The dimmest month is December, down near 4.1 kWh/m² — roughly 39% less than the June peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.3 | 5.0 | 5.6 | 6.3 | 6.6 | 6.7 | 6.6 | 6.4 | 6.0 | 5.2 | 4.4 | 4.1 |
| Level | Bright | Bright | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 4.3 | Bright |
| Feb | 5.0 | Bright |
| Mar | 5.6 | Bright |
| Apr | 6.3 | Intense |
| May | 6.6 | Intense |
| Jun | 6.7 | Intense |
| Jul | 6.6 | Intense |
| Aug | 6.4 | Intense |
| Sep | 6.0 | Intense |
| Oct | 5.2 | Bright |
| Nov | 4.4 | Bright |
| Dec | 4.1 | Bright |
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.
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
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).