Lahewa weather in September

In September, Lahewa sees average daytime highs of 28°C and overnight lows near 26°C, with 298 mm of rain across 23.1 wet days and about 12 hours of daylight. It is the 9th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 1% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 hours at the start of September to 12 hours by month's end. Set against the rest of the year, September is Lahewa's 10th-clearest and 3rd-windiest month. For the whole year in context, see Lahewa's year-round climate.

Daytime high
28°
9th warmest
Overnight low
26°
4th coldest
Rainfall
298 mm
23.1 wet days
Daylight
12 hours
6:25 AM – 6:26 PM
Cloud cover
89%
10th clearest
Wind
9 km/h
3rd windiest
Solar energy
5.02 kWh/m²
Travel score
4.1
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical September day in Lahewa reaches about 28°C in the afternoon and slips back to 26°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, September runs on par with August and on par with October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12826
22826
32826
42826
52826
62826
72826
82826
92826
102826
112826
122826
132826
142826
152826
162826
172826
182826
192826
202826
212826
222826
232826
242826
252826
262826
272826
282826
292826
302826

How September really feels in Lahewa

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Lahewa weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 26°22823.611.94.0
Feb28° / 26°18519.3124.1
Mar29° / 26°24525.6123.6
Apr28° / 26°28225.9123.4
May29° / 27°23720.912.14.0
Jun29° / 27°19917.312.14.4
Jul28° / 26°24519.312.14.4
Aug28° / 26°29322.5124.1
Sep28° / 26°29823.1124.1
Oct28° / 26°40725.9123.8
Nov27° / 26°48527.411.93.5
Dec28° / 26°35026.611.93.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 1% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 6% of September, with mostly cloudy or overcast conditions the remaining 93%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1793
2793
3892
4892
5892
6892
7892
8892
9892
10892
11892
12892
13892
14892
15892
16892
17892
18892
19892
20793
21793
22694
23694
24595
25595
26595
27694
28694
29694
30694

Chance of precipitation in September

Any precipitation

Lahewa gets around 298 mm of rain over 23.1 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 77% and peaks near 80% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
177
277
377
477
577
677
777
877
976
1076
1176
1275
1375
1475
1575
1675
1775
1875
1975
2076
2176
2276
2377
2477
2578
2678
2779
2879
2980
3080

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 93% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
1937
2937
3937
4937
5937
6937
7937
8937
9937
10937
11937
12937
13937
14937
15937
16937
17937
18937
19937
20937
21937
22937
23937
24937
25937
26937
27937
28937
29937
30937

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
3010calm

Sunrise & sunset in September

DaylightNight

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

Days grow by about 0 minutes over September. Sunrise moves from 6:30 AM to 6:21 AM, and sunset from 6:32 PM to 6:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:306:32
212.06:306:31
312.06:306:31
412.06:296:31
512.06:296:30
612.06:296:30
712.06:286:30
812.06:286:29
912.06:286:29
1012.06:276:28
1112.06:276:28
1212.06:276:28
1312.06:266:27
1412.06:266:27
1512.06:266:26
1612.06:256:26
1712.06:256:25
1812.06:256:25
1912.06:246:25
2012.06:246:24
2112.06:246:24
2212.06:236:23
2312.06:236:23
2412.06:236:23
2512.06:226:22
2612.06:226:22
2712.06:226:21
2812.06:226:21
2912.06:216:21
3012.06:216:20

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.02 kWh/m².

For context, solar energy here swings from a low near 4.15 kWh/m² to a high of 5.6 kWh/m² in February across the year — September's 5.02 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.1Bright
125.1Bright
135.1Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
Planning a trip in September

Is September a good time to visit Lahewa?

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

4.1
Sightseeing
3rd-best month of the year
4.4
Beach & pool
7th-best month of the year

September is a reasonable time to visit Lahewa for sightseeing.

What to pack for Lahewa in September

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

In September, Lahewa sees daytime highs around 28°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.

light clothesrain gearsun protection

Sea temperature near Lahewa in September

The nearest coast averages about 29°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in May at about 30°C and coldest in November near 29°C.

The water stays above 20°C all year — warm enough for a swim any month.

28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb30Tropical
Mar30Tropical
Apr30Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Lahewa in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Lahewa peaks around February 19 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 19UV 14Jul 11UV 11
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar14Extreme
Apr13Extreme
May12Extreme
Jun11Extreme
Jul11Extreme
Aug12Extreme
Sep14Extreme
Oct14Extreme
Nov12Extreme
Dec12Extreme
Location & terrain

Where is Lahewa?

Lahewa sits at 1.4°N, 97.2°E, 5 m above sea level, in Indonesia. The nearest listed city is Gunungsitoli, 51 km away.

Topography around Lahewa

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Lahewa.

Within 3 km, the terrain around Lahewa has only modest variations in elevation — a maximum elevation change of 76 m around an average of 31 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 177 m; within 80 km, large variations in elevation — a maximum elevation change of 842 m.

The land around Lahewa is covered by trees (81%) within 3 km, water (68%) and trees (30%) within 16 km, and water (80%) and trees (20%) within 80 km.

3 km
76 m
16 km
177 m
80 km
842 m
treesgrasslandartificial surfaceswatermangroves
September weather nearby: Gunungsitoli 51 km · Teluk Dalam 116 km · Singkil 121 km · Barus 153 km · Subulussalam 162 km · Sibolga 183 km · Sidikalang 197 km · Tarutung 211 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
Muslim 87%Protestant 8%Roman Catholic 3%Hindu 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 Lahewa (1.3943°, 97.1675°, elevation 5 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).