Passi weather in September

In September, Passi sees average daytime highs of 31°C and overnight lows near 25°C, with 239 mm of rain across 27.5 wet days and about 12.1 hours of daylight. It is the 4th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 3% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 12 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Passi's 10th-clearest and 9th-windiest month. For the whole year in context, see Passi's year-round climate.

Daytime high
31°
4th warmest
Overnight low
25°
7th coldest
Rainfall
239 mm
27.5 wet days
Daylight
12 h 06 min
5:42 AM – 5:46 PM
Cloud cover
86%
10th clearest
Wind
10 km/h
9th windiest
Solar energy
4.66 kWh/m²
Travel score
2.5
out of 10

Passi is city of the Philippines in the province of Iloilo.

Density
170/km²
people per km²
Founded
1766

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 31°C through the month.

A typical September day in Passi reaches about 31°C in the afternoon and slips back to 25°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 33°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)
13125
23125
33125
43125
53125
63125
73125
83125
93125
103125
113125
123125
133125
143125
153125
163125
173125
183125
193125
203125
213125
223125
233125
243125
253125
263125
273125
283125
293125
303125

How September really feels in Passi

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
10 feel dangerously hot (≥ 39°C)
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.

Passi weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 24°12118.611.44.2
Feb30° / 24°9614.411.64.4
Mar31° / 25°9015.211.94.0
Apr33° / 25°7213.212.23.5
May33° / 26°13122.812.52.6
Jun32° / 25°18926.612.62.4
Jul31° / 25°25027.912.62.5
Aug31° / 25°20427.212.42.6
Sep31° / 25°23927.512.12.5
Oct31° / 25°23527.511.82.6
Nov30° / 25°17724.911.53.0
Dec30° / 25°20824.911.43.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 9% of September, with mostly cloudy or overcast conditions the remaining 88%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11288
21288
31288
41288
51387
61387
71387
81387
91387
101288
111288
121288
131288
141189
151189
161189
171288
181288
191288
201288
211288
221288
231288
241288
251288
261288
271288
281288
291288
301288

Chance of precipitation in September

Any precipitation

Passi gets around 239 mm of rain over 27.5 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 91% and peaks near 93% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
189
290
390
490
591
691
792
892
992
1092
1193
1293
1392
1492
1592
1692
1792
1891
1991
2091
2191
2291
2391
2491
2591
2691
2792
2892
2992
3092

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable band about 99% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
10100
20100
30100
40100
50100
6199
7199
8199
9199
10199
11199
12199
13199
14199
15199
16199
17199
18298
19298
20298
21298
22298
23298
24298
25298
26298
27199
28199
29199
30199

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 9 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
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

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

Days shrink by about 18 minutes over September. Sunrise moves from 5:43 AM to 5:41 AM, and sunset from 5:56 PM to 5:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.25:435:56
212.25:435:55
312.25:435:54
412.25:435:54
512.25:435:53
612.25:425:52
712.25:425:52
812.15:425:51
912.15:425:50
1012.15:425:50
1112.15:425:49
1212.15:425:48
1312.15:425:48
1412.15:425:47
1512.15:425:46
1612.15:425:46
1712.15:425:45
1812.05:425:44
1912.05:425:44
2012.05:425:43
2112.05:425:42
2212.05:425:41
2312.05:425:41
2412.05:425:40
2512.05:415:39
2612.05:415:39
2711.95:415:38
2811.95:415:37
2911.95:415:37
3011.95:415:36

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.66 kWh/m².

For context, solar energy here swings from a low near 3.97 kWh/m² to a high of 6.17 kWh/m² in April across the year — September's 4.66 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.7Bright
104.7Bright
114.7Bright
124.7Bright
134.7Bright
144.7Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.6Bright
204.6Bright
214.6Bright
224.6Bright
234.6Bright
244.6Bright
254.6Bright
264.6Bright
274.6Bright
284.6Bright
294.5Bright
304.5Bright
Planning a trip in September

Hazard calendar for Passi

In seasonPeak

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

Passi sits in the Pacific typhoon belt; the season peaks July–October.

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

Is September a good time to visit Passi?

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

2.5
Sightseeing
10th-best month of the year
3.7
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Passi.

What to pack for Passi in September

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

In September, Passi sees daytime highs around 31°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 28 days see rain.

light clothesrain gearsun protection

Sea temperature near Passi 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 36 km away) is warmest in May at about 30°C and coldest in February near 27°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
Jan27Warm
Feb27Warm
Mar28Warm
Apr29Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Tropical

UV index in Passi in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Passi peaks around April 9 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 11 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highApr 9UV 14Dec 11UV 9
UV index (midday)Level
Jan11Extreme
Feb13Extreme
Mar14Extreme
Apr14Extreme
May12Extreme
Jun13Extreme
Jul12Extreme
Aug13Extreme
Sep13Extreme
Oct11Extreme
Nov10Very high
Dec9Very high

Air quality in Passi 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 Passi is worst in September — around 17 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateSep 1717 µg/m³Feb 1912 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb12Good
Mar12Good
Apr13Moderate
May15Moderate
Jun15Moderate
Jul16Moderate
Aug16Moderate
Sep17Moderate
Oct16Moderate
Nov13Moderate
Dec12Moderate
Location & terrain

Where is Passi?

Passi sits at 11.1°N, 122.6°E, 42 m above sea level, in Philippines. The nearest listed city is Enrique B. Magalona, 45 km away.

Topography around Passi

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

Within 3 km, the terrain around Passi has only modest variations in elevation — a maximum elevation change of 161 m around an average of 53 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 570 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,035 m.

The land around Passi is covered by trees (57%) and cropland (23%) within 3 km, trees (73%) within 16 km, and trees (47%) and water (38%) within 80 km.

3 km
161 m
16 km
570 m
80 km
2,035 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Enrique B. Magalona 45 km · Iloilo 46 km · Victorias 52 km · Binonga 53 km · Talisay 54 km · Roxas City 54 km · Manapla 55 km · Bacolod City 59 km

Philippines travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B / C
230 V · 60 Hz
Prices
≈ 33% of US
price level, 2025
GDP per capita
$4,171
2025
Happiness
6.2 / 10
World Happiness, 2025
Safe drinking water
48%
of population, 2024
Homicide rate
4.3
per 100k, 2023
Road deaths
12
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
High
EF EPI 569
Religion
Roman Catholic 79%other 8%Muslim 6%other Christian 4%

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 Passi (11.1078°, 122.6419°, elevation 42 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).