Calatagan weather in September

In September, Calatagan sees average daytime highs of 28°C and overnight lows near 26°C, with 314 mm of rain across 25.6 wet days and about 12.1 hours of daylight. It is the 8th-warmest and 2nd-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 5% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 18 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Calatagan's 10th-clearest and 10th-windiest month. For the whole year in context, see Calatagan's year-round climate.

Daytime high
28°
8th warmest
Overnight low
26°
7th coldest
Rainfall
314 mm
25.6 wet days
Daylight
12 h 06 min
5:50 AM – 5:54 PM
Cloud cover
86%
10th clearest
Wind
14 km/h
10th windiest
Solar energy
4.9 kWh/m²
Travel score
3.8
out of 10

Calatagan is municipality of the Philippines in the province of Batangas.

Density
144/km²
people per km²
Founded
1912

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 28°C through the month.

A typical September day in Calatagan 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.

24°26°28°30°32°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 Calatagan

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.

Calatagan weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 25°223.811.37.4
Feb27° / 24°212.711.57.6
Mar28° / 25°242.811.97.3
Apr29° / 26°183.212.36.5
May29° / 27°10914.612.64.8
Jun29° / 27°22022.412.83.8
Jul28° / 26°37526.512.73.6
Aug28° / 26°29225.612.53.9
Sep28° / 26°31425.612.13.8
Oct28° / 26°1812011.74.5
Nov28° / 26°8910.411.45.8
Dec28° / 25°1279.211.26.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 5% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 7% of September, with mostly cloudy or overcast conditions the remaining 88%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11387
21387
31387
41387
51288
61288
71288
81189
91189
101189
111189
121090
13991
14991
15991
16991
17991
181090
191090
201189
211189
221288
231387
241387
251585
261585
271783
281783
291981
301981

Chance of precipitation in September

Any precipitation

Calatagan gets around 314 mm of rain over 25.6 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 85% and peaks near 89% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
181
281
381
481
582
683
784
884
985
1086
1187
1288
1388
1489
1589
1689
1789
1889
1988
2088
2187
2287
2386
2485
2584
2683
2782
2881
2981
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 52% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
14654
24753
34852
44951
54951
65050
75149
85149
95149
105248
115248
125248
135248
145248
155248
165347
175347
185347
195347
205248
215248
225347
235347
245446
255446
265545
275545
285644
295644
305743

Wind in September

Winds average 14 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 18 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 24 minutes over September. Sunrise moves from 5:49 AM to 5:50 AM, and sunset from 6:05 PM to 5:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:496:05
212.35:496:05
312.25:496:04
412.25:496:03
512.25:496:02
612.25:496:02
712.25:496:01
812.25:496:00
912.25:495:59
1012.25:495:59
1112.15:495:58
1212.15:495:57
1312.15:495:56
1412.15:495:56
1512.15:495:55
1612.15:505:54
1712.15:505:53
1812.05:505:53
1912.05:505:52
2012.05:505:51
2112.05:505:50
2212.05:505:49
2312.05:505:49
2412.05:505:48
2512.05:505:47
2611.95:505:46
2711.95:505:46
2811.95:505:45
2911.95:505:44
3011.95:505:44

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.9 kWh/m².

For context, solar energy here swings from a low near 4.28 kWh/m² to a high of 6.81 kWh/m² in April across the year — September's 4.9 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
104.9Bright
114.9Bright
124.9Bright
134.9Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
Planning a trip in September

Hazard calendar for Calatagan

In seasonPeak

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

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

Calatagan's monsoon runs June–October, when most of the year's rain falls.

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

Is September a good time to visit Calatagan?

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

3.8
Sightseeing
10th-best month of the year
4.1
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Calatagan.

What to pack for Calatagan in September

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

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

light clothesrain gearsun protection

Sea temperature near Calatagan 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 June 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
Mar27Warm
Apr28Tropical
May30Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec28Warm

UV index in Calatagan 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 Calatagan peaks around August 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 22 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 highAug 18UV 14Nov 22UV 9
UV index (midday)Level
Jan10Very high
Feb11Extreme
Mar12Extreme
Apr13Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug14Extreme
Sep13Extreme
Oct11Extreme
Nov9Very high
Dec9Very high

Air quality in Calatagan 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 Calatagan is worst in April — around 15 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateGoodApr 1215 µg/m³Jun 1711 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb11Good
Mar14Moderate
Apr15Moderate
May13Moderate
Jun11Good
Jul12Moderate
Aug13Moderate
Sep12Good
Oct12Good
Nov11Good
Dec12Good
Location & terrain

Where is Calatagan?

Calatagan sits at 13.8°N, 120.6°E, 13 m above sea level, in Philippines. The nearest listed city is Balayan, 16 km away.

Topography around Calatagan

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

Within 3 km, the terrain around Calatagan has only modest variations in elevation — a maximum elevation change of 68 m around an average of 9 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 338 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,539 m.

The land around Calatagan is covered by water (40%) and trees (31%) within 3 km, water (80%) within 16 km, and water (60%) and trees (30%) within 80 km.

3 km
68 m
16 km
338 m
80 km
2,539 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Balayan 16 km · Calaca 23 km · Nasugbu 26 km · Taal 32 km · Bauan 41 km · San Pascual 42 km · General Emilio Aguinaldo 43 km · Tagaytay 44 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 Calatagan (13.8322°, 120.6322°, elevation 13 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).