Vigan weather in September

In September, Vigan sees average daytime highs of 28°C and overnight lows near 25°C, with 411 mm of rain across 27.6 wet days and about 12.1 hours of daylight. It is the 9th-warmest and 3rd-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 6% 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 Vigan's 10th-clearest and 10th-windiest month. For the whole year in context, see Vigan's year-round climate.

Daytime high
28°
9th warmest
Overnight low
25°
8th coldest
Rainfall
411 mm
27.6 wet days
Daylight
12 h 06 min
5:50 AM – 5:56 PM
Cloud cover
83%
10th clearest
Wind
9 km/h
10th windiest
Solar energy
4.88 kWh/m²
Travel score
3.3
out of 10

Vigan is city of the Philippines and capital of the province of Ilocos Sur.

Density
1,933/km²
people per km²
Founded
1572

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 Vigan reaches about 28°C in the afternoon and slips back to 25°C overnight — a 4°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)
12825
22825
32825
42825
52825
62825
72825
82825
92825
102825
112825
122825
132825
142825
152825
162825
172825
182825
192825
202825
212825
222825
232825
242925
252925
262925
272925
282925
292924
302924

How September really feels in Vigan

Once humidity and wind are folded in, September averages 6 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
6
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.

Vigan weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 22°163.111.17.7
Feb28° / 22°16311.47.7
Mar29° / 23°235.611.96.7
Apr29° / 25°491212.45.4
May29° / 25°20322.912.83.7
Jun29° / 25°36727.2133.1
Jul29° / 25°59029.212.93.1
Aug28° / 25°61728.812.63.2
Sep28° / 25°41127.612.13.3
Oct29° / 24°24019.511.64.3
Nov29° / 24°9312.811.25.2
Dec28° / 23°457.4116.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 6% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 11% of September, with mostly cloudy or overcast conditions the remaining 83%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11288
21288
31288
41288
51288
61288
71288
81288
91387
101387
111387
121486
131486
141486
151585
161684
171783
181882
191882
201882
212080
222080
232278
242377
252476
262476
272575
282575
292773
302872

Chance of precipitation in September

Any precipitation

Vigan gets around 411 mm of rain over 27.6 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 91% and peaks near 95% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
192
293
393
493
593
693
793
894
994
1094
1194
1294
1395
1495
1594
1694
1794
1893
1992
2092
2191
2291
2390
2489
2588
2687
2786
2885
2984
3083

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 82% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
107921
207921
308020
408020
508020
608020
708020
808119
908119
1008119
1108119
1208119
1308119
1408218
1518118
1618118
1718217
1818217
1918217
2018316
2118316
2218316
2318316
2418316
2518415
2618415
2728315
2828414
2928414
3028513

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 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

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 5:48 AM to 5:52 AM, and sunset from 6:09 PM to 5:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:486:09
212.35:486:08
312.35:486:07
412.35:486:06
512.35:486:05
612.35:486:04
712.25:496:04
812.25:496:03
912.25:496:02
1012.25:496:01
1112.25:496:00
1212.25:495:59
1312.15:495:58
1412.15:505:57
1512.15:505:57
1612.15:505:56
1712.15:505:55
1812.15:505:54
1912.05:505:53
2012.05:505:52
2112.05:515:51
2212.05:515:50
2312.05:515:50
2412.05:515:49
2511.95:515:48
2611.95:515:47
2711.95:515:46
2811.95:525:45
2911.95:525:44
3011.95:525:44

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.88 kWh/m².

For context, solar energy here swings from a low near 4.29 kWh/m² to a high of 6.68 kWh/m² in April across the year — September's 4.88 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.9Bright
204.9Bright
214.9Bright
224.9Bright
234.9Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
Planning a trip in September

Hazard calendar for Vigan

In seasonPeak

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

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

Vigan's monsoon runs June–September, 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 Vigan?

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

3.3
Sightseeing
9th-best month of the year
3.9
Beach & pool
10th-best month of the year

September is a weaker month for outdoor sightseeing in Vigan.

What to pack for Vigan in September

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

In September, Vigan sees daytime highs around 28°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 Vigan 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
Mar28Warm
Apr29Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Tropical

UV index in Vigan 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 Vigan peaks around August 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highAug 16UV 13Dec 14UV 8
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar12Extreme
Apr12Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct10Extreme
Nov8Very high
Dec8Very high

Air quality in Vigan 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 Vigan is worst in March — around 16 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (December, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMar 2416 µg/m³Dec 159 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Moderate
Mar16Moderate
Apr16Moderate
May11Good
Jun10Good
Jul9Good
Aug10Good
Sep10Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Vigan?

Vigan sits at 17.6°N, 120.4°E, 19 m above sea level, in Philippines. The nearest listed city is Bantay, 1.0 km away.

Topography around Vigan

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

Within 3 km, the terrain around Vigan has only modest variations in elevation — a maximum elevation change of 45 m around an average of 9 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,097 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,557 m.

The land around Vigan is covered by cropland (44%), trees (31%) and artificial surfaces (21%) within 3 km, water (50%) and trees (29%) within 16 km, and trees (49%) and water (38%) within 80 km.

3 km
45 m
16 km
1,097 m
80 km
2,557 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Bantay 1.0 km · Bangued 27 km · Batac City 57 km · Santa Maria 70 km · San Nicolas 70 km · Tagudin 71 km · Laoag 73 km · Bontoc 83 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 Vigan (17.5747°, 120.3869°, elevation 19 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).