Lamongan weather in September

In September, Lamongan sees average daytime highs of 30°C and overnight lows near 25°C, with 23 mm of rain across 3.9 wet days and about 12 hours of daylight. It is the 2nd-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 50% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Lamongan's 3rd-clearest and 6th-windiest month. For the whole year in context, see Lamongan's year-round climate.

Daytime high
30°
2nd warmest
Overnight low
25°
3rd coldest
Rainfall
23 mm
3.9 wet days
Daylight
12 hours
5:26 AM – 5:23 PM
Cloud cover
44%
3rd clearest
Wind
11 km/h
6th windiest
Solar energy
6.74 kWh/m²
Travel score
5.9
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical September day in Lamongan reaches about 30°C in the afternoon and slips back to 25°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 31°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13025
23025
33025
43025
53025
63025
73025
83025
93025
103025
113025
123025
133025
143025
153025
163025
173025
183025
193025
203025
213025
223025
233026
243026
253026
263026
273026
283026
293026
303026

How September really feels in Lamongan

Once humidity and wind are folded in, September averages 30 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
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Lamongan weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 26°28529.212.43.0
Feb29° / 26°25026.712.22.9
Mar29° / 26°22228.4123.1
Apr30° / 26°18824.111.83.4
May30° / 26°9515.111.74.6
Jun29° / 26°639.811.65.4
Jul29° / 25°325.311.66.2
Aug29° / 25°92.611.86.5
Sep30° / 25°233.9125.9
Oct30° / 26°7312.612.24.7
Nov30° / 26°16123.612.33.4
Dec29° / 26°25727.712.43.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 32%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17426
27426
37426
47426
57426
67327
77228
87228
97228
107228
117129
127129
137129
147030
156931
166832
176832
186733
196634
206634
216535
226436
236436
246436
256337
266337
276337
286238
296139
306040

Chance of precipitation in September

Any precipitation

Lamongan gets around 23 mm of rain over 3.9 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 14% and peaks near 23% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
111
210
310
410
510
610
711
811
911
1011
1111
1211
1311
1411
1511
1612
1712
1813
1913
2014
2114
2215
2316
2417
2518
2619
2720
2821
2922
3023

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 79% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1019783
2119773
3119773
4119773
5119782
6120772
7120772
8120772
9120772
10120763
11119773
12119773
13118783
14118774
15017794
16017785
17016795
18015796
19014797
20013807
21012808
22011818
23010819
2409829
25098110
26088210
27088111
28088111
29078211
30078211

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over September. Sunrise moves from 5:34 AM to 5:18 AM, and sunset from 5:26 PM to 5:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:345:26
211.95:345:26
311.95:335:26
411.95:335:25
511.95:325:25
611.95:315:25
711.95:315:25
811.95:305:25
911.95:305:25
1011.95:295:25
1111.95:295:24
1211.95:285:24
1311.95:285:24
1411.95:275:24
1512.05:265:24
1612.05:265:23
1712.05:255:23
1812.05:255:23
1912.05:245:23
2012.05:245:23
2112.05:235:23
2212.05:225:22
2312.05:225:22
2412.05:215:22
2512.05:215:22
2612.05:205:22
2712.05:205:22
2812.05:195:22
2912.05:195:21
3012.15:185:21

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.74 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 5.01 kWh/m² to a high of 6.74 kWh/m² in September across the year — September's 6.74 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.5Intense
46.6Intense
56.6Intense
66.6Intense
76.6Intense
86.7Intense
96.7Intense
106.7Intense
116.7Intense
126.7Intense
136.7Intense
146.8Intense
156.8Intense
166.8Intense
176.8Intense
186.8Intense
196.8Intense
206.8Intense
216.8Intense
226.8Intense
236.8Intense
246.8Intense
256.8Intense
266.8Intense
276.8Intense
286.8Intense
296.8Intense
306.8Intense
Planning a trip in September

Hazard calendar for Lamongan

In seasonPeak

None of Lamongan's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Lamongan sits in the South Indian Ocean cyclone belt; the season peaks January–March.

Lamongan's monsoon runs November–April, when most of the year's rain falls.

Cyclone
Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Lamongan?

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

5.9
Sightseeing
3rd-best month of the year
8.0
Beach & pool
3rd-best month of the year

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

What to pack for Lamongan in September

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

In September, Lamongan sees daytime highs around 30°C and nights near 25°C. Pack light clothes and sun protection. About 4 days see rain.

light clothessun protection

Sea temperature near Lamongan 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 at the nearest coast (about 27 km away) is warmest in November 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.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr30Tropical
May30Tropical
Jun29Tropical
Jul29Tropical
Aug28Tropical
Sep29Tropical
Oct29Tropical
Nov30Tropical
Dec30Tropical

UV index in Lamongan 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 Lamongan peaks around March 17 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 16 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeVery highMar 17UV 13Jun 16UV 7
UV index (midday)Level
Jan12Extreme
Feb11Extreme
Mar13Extreme
Apr11Extreme
May9Very high
Jun7High
Jul9Very high
Aug10Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec10Extreme

Air quality in Lamongan in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Lamongan is worst in October — around 41 µg/m³ PM2.5 (poor), about 1.7× the cleanest month (February, 24 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModeratePoorOct 2141 µg/m³Feb 1225 µg/m³
PM2.5 (µg/m³)Level
Jan28Moderate
Feb24Moderate
Mar32Moderate
Apr36Poor
May38Poor
Jun36Poor
Jul32Moderate
Aug29Moderate
Sep33Moderate
Oct41Poor
Nov39Poor
Dec34Moderate
Location & terrain

Where is Lamongan?

Lamongan sits at 7.1°S, 112.4°E, 8 m above sea level, in Indonesia. The nearest listed city is Kebomas, 25 km away.

Topography around Lamongan

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

Within 3 km, the terrain around Lamongan has only modest variations in elevation — a maximum elevation change of 15 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 104 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,306 m.

The land around Lamongan is covered by cropland (69%) and artificial surfaces (24%) within 3 km, cropland (73%) within 16 km, and water (35%), cropland (30%) and trees (24%) within 80 km.

3 km
15 m
16 km
104 m
80 km
3,306 m
treesgrasslandcroplandartificial surfaceswaterwetlandmangroves
September weather nearby: Kebomas 25 km · Gresik 27 km · Paciran 27 km · Babat 28 km · Kamal 34 km · Driyorejo 36 km · Bangkalan 36 km · Krian 37 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 Lamongan (-7.1167°, 112.4167°, elevation 8 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. 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).