Climate and average weather in Luwuk
In Luwuk, the weather is muggy, hot, wet, and mostly cloudy and remarkably steady, with daytime highs holding near hot levels all year. The wettest stretch peaks around April.
Over the course of the year, the temperature in Luwuk typically varies from 21°C to 28°C, and is rarely below 20°C or above 30°C. November is the hottest month of the year, while July is the coldest.
Based on the travel score, the best time of year to visit Luwuk for warm-weather activities is from mid July to late October.
- Hottest
- Nov
- 28°
- Coldest
- Jul
- 21°
- Wettest
- Apr
- 231 mm
- Driest
- Sep
- 51 mm
- Rain / yr
- 1628 mm
- 233 wet days
- Daylight
- 11.9–12.1 h
- shortest–longest
- Elevation
- 17 m
- 1.0°S
- Clearest
- Sep
- 60% cloud
Luwuk 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 mid July to late October.
Temperature through the year
Daily average highs and lows in Luwuk, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
Temperatures in Luwuk stay fairly even through the year, without a distinct hot or cool season. The warmest month is November, with an average high of 28°C and low of 23°C; the coolest is July, with an average low of 21°C and high of 26°C.
Days typically run about 5°C warmer than nights year-round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 28 | 28 | 28 | 27 | 26 | 26 | 26 | 27 | 28 | 28 | 28 |
| Avg low (°C) | 23 | 23 | 23 | 23 | 23 | 22 | 21 | 21 | 21 | 22 | 23 | 23 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 28 | 23 |
| Feb | 28 | 23 |
| Mar | 28 | 23 |
| Apr | 28 | 23 |
| May | 27 | 23 |
| Jun | 26 | 22 |
| Jul | 26 | 21 |
| Aug | 26 | 21 |
| Sep | 27 | 21 |
| Oct | 28 | 22 |
| Nov | 28 | 23 |
| Dec | 28 | 23 |
Average hourly temperature in Luwuk
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 November afternoons, near 28°C, and coldest before dawn in July, near 21°C.
Luwuk weather by month
Every month at a glance. Click a month for its detailed page.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 28° / 23° | 114 | 19.6 | 12 | 4.6 |
| Feb | 28° / 23° | 111 | 17.8 | 12 | 4.5 |
| Mar | 28° / 23° | 179 | 24 | 12 | 4.0 |
| Apr | 28° / 23° | 231 | 26.3 | 12 | 3.8 |
| May | 27° / 23° | 205 | 25.1 | 12 | 4.2 |
| Jun | 26° / 22° | 184 | 22.6 | 11.9 | 4.5 |
| Jul | 26° / 21° | 123 | 18.5 | 12 | 5.3 |
| Aug | 26° / 21° | 74 | 12.4 | 12 | 6.2 |
| Sep | 27° / 21° | 51 | 9 | 12 | 6.5 |
| Oct | 28° / 22° | 74 | 11.5 | 12 | 5.7 |
| Nov | 28° / 23° | 122 | 21.3 | 12 | 4.1 |
| Dec | 28° / 23° | 161 | 24.5 | 12.1 | 3.9 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Luwuk gets about 1628 mm of precipitation a year. On a typical day the chance of rain is very wet, but that rises and falls sharply with the seasons.
The wetter season lasts 4.4 months, from around Feb 28 to Jul 10, peaking in April at about 88% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Sep 16.
April is the wettest month by volume, with 231 mm over about 26 wet days; September is the driest, with 51 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 65 | 63 | 77 | 88 | 81 | 75 | 59 | 40 | 31 | 38 | 70 | 78 |
| Rain days | 20 | 18 | 24 | 26 | 25 | 23 | 19 | 12 | 9 | 12 | 21 | 25 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 65 | 20 |
| Feb | 63 | 18 |
| Mar | 77 | 24 |
| Apr | 88 | 26 |
| May | 81 | 25 |
| Jun | 75 | 23 |
| Jul | 59 | 19 |
| Aug | 40 | 12 |
| Sep | 31 | 9 |
| Oct | 38 | 12 |
| Nov | 70 | 21 |
| Dec | 78 | 25 |
Monthly rainfall
Over a full year, Luwuk collects about 1628 mm of rain across 233 wet days — roughly 136 mm in an average month.
It doesn’t fall evenly. April is the wettest month with 231 mm, while September is the driest at just 51 mm. The three wettest months alone bring about 38% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 114 | 111 | 179 | 231 | 205 | 184 | 123 | 74 | 51 | 74 | 122 | 161 |
| Rain days | 20 | 18 | 24 | 26 | 25 | 23 | 19 | 12 | 9 | 12 | 21 | 25 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 114 | 20 |
| Feb | 111 | 18 |
| Mar | 179 | 24 |
| Apr | 231 | 26 |
| May | 205 | 25 |
| Jun | 184 | 23 |
| Jul | 123 | 19 |
| Aug | 74 | 12 |
| Sep | 51 | 9 |
| Oct | 74 | 12 |
| Nov | 122 | 21 |
| Dec | 161 | 25 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Luwuk, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.
The clearer part of the year begins around May 14 and lasts for 5.9 months, ending around November 10. The clearest month is September, when the sky is clear, mostly clear, or partly cloudy 46% of the time on average.
The cloudier part of the year begins around November 11 and lasts for 6.0 months, ending around May 13. The cloudiest month is December, when it is overcast or mostly cloudy 92% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 9 | 11 | 13 | 15 | 23 | 26 | 31 | 39 | 46 | 36 | 20 | 8 |
| Cloudier (%) | 91 | 89 | 87 | 85 | 77 | 74 | 69 | 61 | 54 | 64 | 80 | 92 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 9 | 91 |
| Feb | 11 | 89 |
| Mar | 13 | 87 |
| Apr | 15 | 85 |
| May | 23 | 77 |
| Jun | 26 | 74 |
| Jul | 31 | 69 |
| Aug | 39 | 61 |
| Sep | 46 | 54 |
| Oct | 36 | 64 |
| Nov | 20 | 80 |
| Dec | 8 | 92 |
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. Close to the equator, Luwuk barely changes through the year: days stay near 12 h 06 min of light in every season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.9 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.1 |
| Sunrise (AM) | 5:57 | 6:03 | 5:58 | 5:50 | 5:46 | 5:51 | 5:56 | 5:54 | 5:43 | 5:33 | 5:33 | 5:43 |
| Sunset (PM) | 6:00 | 6:04 | 5:59 | 5:48 | 5:44 | 5:47 | 5:53 | 5:52 | 5:43 | 5:35 | 5:35 | 5:47 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 12.0 | 5:57 | 6:00 |
| Feb | 12.0 | 6:03 | 6:04 |
| Mar | 12.0 | 5:58 | 5:59 |
| Apr | 12.0 | 5:50 | 5:48 |
| May | 12.0 | 5:46 | 5:44 |
| Jun | 11.9 | 5:51 | 5:47 |
| Jul | 12.0 | 5:56 | 5:53 |
| Aug | 12.0 | 5:54 | 5:52 |
| Sep | 12.0 | 5:43 | 5:43 |
| Oct | 12.0 | 5:33 | 5:35 |
| Nov | 12.0 | 5:33 | 5:35 |
| Dec | 12.1 | 5:43 | 5:47 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Luwuk averages about 3 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 0 and 8 days.
The sunnier stretch runs 4.3 months, from around Jul 7 to Nov 14. The sunniest month is September, with roughly 8 sunny days (gloomy).
The greyest month is December, down near 1 sunny days — about 93% fewer than the September peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 1 | 1 | 1 | 1 | 3 | 3 | 4 | 6 | 7 | 6 | 3 | 1 |
| Sky | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy |
| Sunny days | Sky | |
|---|---|---|
| Jan | 1 | Gloomy |
| Feb | 1 | Gloomy |
| Mar | 1 | Gloomy |
| Apr | 1 | Gloomy |
| May | 3 | Gloomy |
| Jun | 3 | Gloomy |
| Jul | 4 | Gloomy |
| Aug | 6 | Gloomy |
| Sep | 7 | Gloomy |
| Oct | 6 | Gloomy |
| Nov | 3 | Gloomy |
| Dec | 1 | Gloomy |
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.
Luwuk is humid all year round — on a typical day the air feels at least humid, and there is no real dry season to wait for.
The stickiest month is January, when it feels muggy, oppressive or miserable about 100% of the time. Even in September, the mildest month, the air is dry or comfortable only 3% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| Comfortable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 0 | 0 |
| Humid (%) | 0 | 1 | 0 | 0 | 0 | 0 | 2 | 7 | 14 | 11 | 2 | 0 |
| Muggy (%) | 24 | 29 | 19 | 7 | 13 | 39 | 71 | 79 | 63 | 47 | 29 | 13 |
| Oppressive (%) | 76 | 70 | 81 | 93 | 87 | 60 | 27 | 13 | 19 | 40 | 69 | 87 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| Jan | 0 | 0 | 0 | 24 | 76 |
| Feb | 0 | 0 | 1 | 29 | 70 |
| Mar | 0 | 0 | 0 | 19 | 81 |
| Apr | 0 | 0 | 0 | 7 | 93 |
| May | 0 | 0 | 0 | 13 | 87 |
| Jun | 0 | 0 | 0 | 39 | 60 |
| Jul | 0 | 0 | 2 | 71 | 27 |
| Aug | 0 | 0 | 7 | 79 | 13 |
| Sep | 1 | 2 | 14 | 63 | 19 |
| Oct | 0 | 2 | 11 | 47 | 40 |
| Nov | 0 | 0 | 2 | 29 | 69 |
| Dec | 0 | 0 | 0 | 13 | 87 |
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.
Across the year, average wind speed in Luwuk is typically calm, near 7 km/h, and varies moderately with the seasons.
The windier part of the year lasts 4.9 months, from around May 19 to Oct 13. The windiest month is August, averaging about 12 km/h (calm).
The calmer part of the year runs from around Oct 14 to May 18, with November the calmest month at about 5 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 6 | 6 | 5 | 5 | 7 | 9 | 11 | 12 | 10 | 7 | 5 | 5 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 6 | calm |
| Feb | 6 | calm |
| Mar | 5 | calm |
| Apr | 5 | calm |
| May | 7 | calm |
| Jun | 9 | calm |
| Jul | 11 | calm |
| Aug | 12 | calm |
| Sep | 10 | calm |
| Oct | 7 | calm |
| Nov | 5 | calm |
| Dec | 5 | calm |
Best time to visit Luwuk
To characterize how pleasant the weather is in Luwuk throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around mid October, Luwuk 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 18°C and 28°C. Based on this score, the best time of year to visit Luwuk for general outdoor tourist activities is from mid July to late October, with a peak score in the first week of September.
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) | 4.5 | 4.5 | 4.0 | 3.8 | 4.1 | 4.5 | 5.3 | 6.2 | 6.5 | 5.7 | 4.1 | 3.9 |
| Rating | fair | fair | fair | fair | fair | fair | fair | good | good | good | fair | fair |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 4.5 | fair |
| Feb | 4.5 | fair |
| Mar | 4.0 | fair |
| Apr | 3.8 | fair |
| May | 4.1 | fair |
| Jun | 4.5 | fair |
| Jul | 5.3 | fair |
| Aug | 6.2 | good |
| Sep | 6.5 | good |
| Oct | 5.7 | good |
| Nov | 4.1 | fair |
| Dec | 3.9 | fair |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Luwuk for hot-weather activities is from late July to early November, with a peak score in the last week of September.
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 Luwuk, 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.
Luwuk packs about the same all year — highs hold near 28°C. Across the year the things worth having are light clothes, rain gear and sun protection.
In November, Luwuk sees daytime highs around 28°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.
Sea temperature near Luwuk
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 13 km away) is warmest in April at about 30°C and coldest in August near 28°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 28 | 29 | 29 | 30 | 30 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 30 | Tropical |
| Feb | 30 | Tropical |
| Mar | 30 | Tropical |
| Apr | 30 | Tropical |
| May | 30 | Tropical |
| Jun | 29 | Tropical |
| Jul | 29 | Tropical |
| Aug | 28 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 30 | Tropical |
| Dec | 30 | Tropical |
UV index (midday) in Luwuk 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 Luwuk peaks around February 19 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 11 (extreme).
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) | 15 | 16 | 15 | 14 | 13 | 11 | 11 | 13 | 14 | 14 | 13 | 12 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 16 | Extreme |
| Mar | 15 | Extreme |
| Apr | 14 | Extreme |
| May | 13 | Extreme |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 13 | Extreme |
| Sep | 14 | Extreme |
| Oct | 14 | Extreme |
| Nov | 13 | Extreme |
| Dec | 12 | Extreme |
Average hourly UV index in Luwuk
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 February the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 7 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) | 8.5 | 8.5 | 8.5 | 8 | 8 | 7.5 | 7.5 | 8 | 8 | 8 | 8 | 8 |
| UV ≥ 6 (h/day) | 6.5 | 7 | 6.5 | 6.5 | 6.5 | 5.5 | 5.5 | 6 | 6.5 | 6.5 | 6 | 6 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 8.5 | 6.5 |
| Feb | 8.5 | 7 |
| Mar | 8.5 | 6.5 |
| Apr | 8 | 6.5 |
| May | 8 | 6.5 |
| Jun | 7.5 | 5.5 |
| Jul | 7.5 | 5.5 |
| Aug | 8 | 6 |
| Sep | 8 | 6.5 |
| Oct | 8 | 6.5 |
| Nov | 8 | 6 |
| Dec | 8 | 6 |
Growing season
Luwuk 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 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Luwuk banks about 5,389 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around December.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 478 | 432 | 475 | 453 | 456 | 423 | 420 | 420 | 426 | 464 | 463 | 479 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 478 |
| Feb | 432 |
| Mar | 475 |
| Apr | 453 |
| May | 456 |
| Jun | 423 |
| Jul | 420 |
| Aug | 420 |
| Sep | 426 |
| Oct | 464 |
| Nov | 463 |
| Dec | 479 |
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.
Luwuk receives about 5.2 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 4.3 and 6.1 kWh/m².
The brighter stretch of the year lasts 3.4 months, from around Aug 16 to Nov 28. The brightest month is October, averaging about 6.0 kWh/m² (intense).
The dimmest month is June, down near 4.4 kWh/m² — roughly 27% less than the October peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.2 | 5.4 | 5.4 | 5.0 | 4.7 | 4.4 | 4.6 | 5.2 | 6.0 | 6.0 | 5.5 | 5.0 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Intense | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 5.2 | Bright |
| Feb | 5.4 | Bright |
| Mar | 5.4 | Bright |
| Apr | 5.0 | Bright |
| May | 4.7 | Bright |
| Jun | 4.4 | Bright |
| Jul | 4.6 | Bright |
| Aug | 5.2 | Bright |
| Sep | 6.0 | Bright |
| Oct | 6.0 | Intense |
| Nov | 5.5 | Bright |
| Dec | 5.0 | Bright |
Where is Luwuk?
Luwuk sits at 1.0°S, 122.8°E, 17 m above sea level, in Indonesia. The nearest listed city is Gorontalo, 168 km away.
Topography around Luwuk
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Luwuk.
Within 3 km, the terrain around Luwuk has significant variations in elevation — a maximum elevation change of 523 m around an average of 189 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,495 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,513 m.
The land around Luwuk is covered by trees (50%) and water (28%) within 3 km, trees (62%) and water (32%) within 16 km, and water (56%) and trees (42%) within 80 km.
Indonesia travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 29% of US
- price level, 2025
- GDP per capita
- $5,060
- 2025
- Happiness
- 5.6 / 10
- World Happiness, 2025
- Safe drinking water
- 30%
- of population, 2024
- Homicide rate
- 0.3
- per 100k, 2022
- Road deaths
- 11.3
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 471
- 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 Luwuk (-0.9516°, 122.7875°, elevation 17 m), 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. 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).