Bicol Region

Irosin, Philippines Climate

NASA POWER reanalysis for the half-degree grid cell around Irosin, 1991-2020; a grid cell is an area average and can differ from a thermometer in town by several degrees

The warmest month is May, with an average high of 31°C; the coldest is February, with an average low of 24°C. A normal year brings 2625 mm of precipitation.

Temperature through the year

The normal daily high and low. The line marks today.

Normal daily high and low temperature at Irosin through the year, in °C, with the record for each date.2022.52527.53032.535JanFebMarAprMayJunJulAugSepOctNovDec
  • Normal low
  • Normal high
  • Reanalysis extreme high
  • Reanalysis extreme low

Normals for Sep 25

Normal high
29°C
Normal low
27°C
Reanalysis high
31°Cin 2004
Reanalysis low
25°Cin 2000
Chance of a wet day
83%
Daylight
12 h 05 min

Month by month

Averages for 1991-2020. Wet days have at least 1 mm of precipitation in the reanalysis. Each month links to its own page.

MonthAvg highAvg lowWarmestColdestPrecipitationWet days
January28°C24°C30°C (2020)22°C (2014)267 mm21.7
February28°C24°C30°C (1998)22°C (1992)167 mm17.0
March29°C25°C31°C (1998)22°C (2002)149 mm18.6
April30°C26°C33°C (1998)23°C (2011)93 mm15.0
May31°C27°C34°C (2015)25°C (1993)149 mm18.6
June30°C27°C34°C (1998)25°C (1991)186 mm24.0
July29°C27°C33°C (2016)25°C (1994)236 mm27.9
August29°C27°C32°C (2010)24°C (2014)183 mm21.7
September29°C27°C32°C (1998)25°C (1993)222 mm24.0
October29°C26°C32°C (1999)25°C (2004)260 mm27.9
November29°C26°C31°C (1998)24°C (1992)294 mm27.0
December28°C25°C30°C (2017)22°C (1996)419 mm27.9
Year29°C26°C2625 mm271

Precipitation

Rain and melted snow together. The chance of a wet day is the share of days with at least 1 mm of precipitation in the reanalysis.

2625 mm in a normal year, most in December.

Chance of a wet day

The chance of at least 1 mm of precipitation in the reanalysis on each date at Irosin, in percent.020406080100JanFebMarAprMayJunJulAugSepOctNovDec
  • Chance of a wet day

Humidity and comfort

NASA POWER reanalysis, 1991-2020, for the grid cell around Irosin.

The muggiest month is January, when 100 percent of days are muggy or worse, with a mean dew point of 18°C or more.

MonthDew pointHumidityDryComfortableHumidMuggyOppressiveMiserable
January23°C86%0%0%0%9%65%26%
February23°C84%0%0%0%11%72%17%
March23°C83%0%0%0%5%69%26%
April24°C81%0%0%0%0%53%47%
May25°C80%0%0%0%0%18%82%
June25°C81%0%0%0%0%10%90%
July25°C83%0%0%0%0%10%90%
August25°C84%0%0%0%0%11%89%
September25°C84%0%0%0%0%9%91%
October25°C84%0%0%0%0%17%83%
November25°C86%0%0%0%0%19%81%
December24°C87%0%0%0%2%32%66%

Comfort is judged by the day's mean dew point: dry below 13°C, comfortable to 16°C, humid to 18°C, muggy to 21°C, oppressive to 24°C, miserable above.

Clouds

Average share of the sky covered, from satellite (CERES and GEWEX SRB) by way of NASA POWER, 1991-2020.

The clearest month is April, with the sky 47 percent covered on average; the cloudiest is August, at 80 percent.

Wind

The mean wind speed over the whole day, from the MERRA-2 reanalysis by way of NASA POWER. Gusts run well above it.

The windiest month is January, averaging 19.1 km/h at 10 meters (33 feet) above the ground.

Daylight and sunshine

The longest day is Jun 15, with 12 h 53 min of daylight; the shortest is Dec 19, with 11 h 22 min.

Hours of daylight at Irosin through the year.0510152025JanFebMarAprMayJunJulAugSepOctNovDec
  • Day length

Solar energy

Average daily sunshine reaching the ground on a flat surface, in kilowatt-hours per square meter, clouds included.

Sunrise and sunset calendar

Month pages

The weather in Irosin in each month, day by day.

What this means

A normal is the average of the thirty years 1991 to 2020, the period the World Meteorological Organization and NOAA use for comparison. It is an average, not a forecast: most days depart from it, and some by a long way.

Where no station record is within reach, the extremes shown are the highest and lowest the reanalysis produced for the date in 1991-2020, not measured records.

Cloud, humidity, wind and sunshine come from a reanalysis: a weather model run over the past with every observation fed in, averaged over a grid cell about 50 km across. It is consistent everywhere on Earth; it smooths local detail such as a lake shore or a valley.

More for this place

Nearby

Sources

Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.