Irosin in Winter
In winter (December, January and February), Irosin sees average daytime highs around 28°C and overnight lows near 24°C, with 527 mm of rain over about 60 wet days across the season. It is the coldest season of the year and the 3rd-wettest season.
Across winter, daytime highs hold fairly steady around 28°C. The sky is clear or mostly clear about 16% of the time across winter, and the air most often feels oppressive.
Winter is Irosin's best season of the year to visit on our travel score. Irosin has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Irosin's year-round climate.
- Avg daytime high
- 28°C
- coldest season of the year
- Avg overnight low
- 24°C
- Rainfall
- 527 mm
- 60 wet days
- Avg wind
- 18 km/h
- Travel score
- 4.6
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Irosin in Winter
Across winter, daytime highs hold fairly steady around 28°C.
A typical winter day in Irosin reaches about 28°C and drops to 24°C overnight. The warmest of the three months is December, the coolest February.
How winter really feels in Irosin
Once humidity and wind are folded in, winter brings about 24 days that feel above 32°C and 0 that feel at or below 0°C.
The story in winter is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Irosin weather by month
How the three winter months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 28° / 24° | 172 | 20.4 | 11.3 | 4.8 |
| Feb | 28° / 24° | 107 | 15.7 | 11.6 | 5.0 |
| Mar | 29° / 24° | 90 | 15.6 | 11.9 | 4.9 |
| Apr | 30° / 25° | 59 | 12.2 | 12.3 | 4.7 |
| May | 31° / 26° | 128 | 18.8 | 12.6 | 3.6 |
| Jun | 31° / 26° | 191 | 24.4 | 12.7 | 2.9 |
| Jul | 30° / 25° | 284 | 27.6 | 12.7 | 2.8 |
| Aug | 30° / 26° | 222 | 25.2 | 12.4 | 3.1 |
| Sep | 30° / 25° | 248 | 26 | 12.1 | 2.9 |
| Oct | 30° / 25° | 218 | 26.3 | 11.7 | 3.1 |
| Nov | 29° / 25° | 188 | 24.2 | 11.4 | 3.5 |
| Dec | 28° / 25° | 248 | 23.5 | 11.3 | 4.0 |
Cloud cover in Winter
The sky is clear or mostly clear about 16% of the time across winter.
Chance of precipitation in Winter
Irosin gets around 527 mm of rain over 60 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 18 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 11 h 18 min in early December to 11 h 42 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 4.5 kWh/m².
Hazard calendar for Irosin
In winter, Irosin overlaps its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Irosin sits in the Pacific typhoon belt; the season peaks July–October.
Is winter a good time to visit Irosin?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a reasonable time to visit Irosin for sightseeing.
What to pack for Irosin in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Irosin sees daytime highs around 28°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 60 days see rain.
Sea temperature near Irosin in Winter
The nearest coast averages about 27°C across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 13 km away) is warmest in June at about 29°C and coldest in February near 26°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 26 | 27 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 27 |
| Comfort | Warm | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 26 | Warm |
| Mar | 27 | Warm |
| Apr | 28 | Warm |
| May | 29 | Tropical |
| Jun | 29 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 28 | Tropical |
| Dec | 27 | Warm |
UV index in Irosin in Winter
Clear-sky midday UV across winter averages around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Irosin peaks around April 16 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 9 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 10 | 12 | 13 | 14 | 13 | 13 | 12 | 13 | 13 | 11 | 10 | 9 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Extreme |
| Feb | 12 | Extreme |
| Mar | 13 | Extreme |
| Apr | 14 | Extreme |
| May | 13 | Extreme |
| Jun | 13 | Extreme |
| Jul | 12 | Extreme |
| Aug | 13 | Extreme |
| Sep | 13 | Extreme |
| Oct | 11 | Extreme |
| Nov | 10 | Very high |
| Dec | 9 | Very high |
Air quality in Irosin in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in Irosin is worst in July — around 20 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (April, 9 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 14 | 17 | 11 | 9 | 11 | 16 | 20 | 17 | 18 | 17 | 12 | 12 |
| Level | Moderate | Moderate | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 14 | Moderate |
| Feb | 17 | Moderate |
| Mar | 11 | Good |
| Apr | 9 | Good |
| May | 11 | Good |
| Jun | 16 | Moderate |
| Jul | 20 | Moderate |
| Aug | 17 | Moderate |
| Sep | 18 | Moderate |
| Oct | 17 | Moderate |
| Nov | 12 | Good |
| Dec | 12 | Good |
Where is Irosin?
Irosin sits at 12.7°N, 124.0°E, 33 m above sea level, in Philippines. The nearest listed city is Bulan, 17 km away.
Topography around Irosin
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Irosin.
Within 3 km, the terrain around Irosin has significant variations in elevation — a maximum elevation change of 390 m around an average of 99 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,544 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,412 m.
The land around Irosin is covered by trees (69%) and cropland (27%) within 3 km, trees (77%) within 16 km, and water (63%) and trees (33%) within 80 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
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 Irosin (12.7001°, 124.0322°, elevation 33 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.