Olongapo climate
Olongapo (Philippines) has a tropical monsoon climate (Köppen Am). The average temperature over the year is 28 °C82 °F, and about 2,850 mm112 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Olongapo climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 3085 | 2374 | 2780 | 150.6 |
| Feb | 3187 | 2475 | 2781 | 170.7 |
| Mar | 3290 | 2577 | 2883 | 220.9 |
| Apr | 3392 | 2780 | 3086 | 411.6 |
| May | 3289 | 2781 | 3085 | 2108.2 |
| Jun | 3086 | 2781 | 2984 | 45518 |
| Jul | 2984 | 2780 | 2882 | 57523 |
| Aug | 2984 | 2780 | 2882 | 67427 |
| Sep | 2984 | 2780 | 2882 | 46518 |
| Oct | 3085 | 2679 | 2882 | 2198.6 |
| Nov | 3085 | 2578 | 2882 | 993.9 |
| Dec | 2985 | 2476 | 2780 | 592.3 |
| Year | 3392 | 2374 | 2882 | 2,850112 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 75% | 52% | 4.6 | 11:20 |
| Feb | 72% | 43% | 5.4 | 11:38 |
| Mar | 69% | 37% | 6.1 | 12:01 |
| Apr | 68% | 34% | 6.7 | 12:27 |
| May | 75% | 62% | 6.0 | 12:49 |
| Jun | 82% | 77% | 5.3 | 12:00 |
| Jul | 85% | 84% | 4.7 | 12:55 |
| Aug | 87% | 88% | 4.3 | 12:37 |
| Sep | 86% | 84% | 4.8 | 12:12 |
| Oct | 82% | 71% | 4.8 | 11:46 |
| Nov | 82% | 62% | 4.5 | 11:25 |
| Dec | 80% | 62% | 4.1 | 11:15 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Olongapo is like
The warmest month is April, with an average high of 33 °C92 °F and a low of 27 °C80 °F. The coldest is January, when highs average 30 °C85 °F and lows 23 °C74 °F. Seasonal differences are small — just 3.3 °C6 °F between the warmest and the coolest month.
It is very wet, receiving about 2,850 mm112 in of precipitation per year. The wettest three-month stretch is July–September, which brings 60% of the annual total. Months with less than 20 mm0.8 in on average: January and February. The wettest month is August (674 mm27 in), the driest is January (15 mm0.6 in).
Relative humidity ranges from 68% in April to 87% in August. The clearest skies (lowest average cloud amount, 34%) are typical of April. Average wind speed near the ground ranges from 9 km/h (6 mph) in May to 14 km/h (9 mph) in December. Daylight lasts from about 11.3 hours in December to 13.0 hours in June.
Best time to visit Olongapo
Based on these averages, the most comfortable months for sightseeing and outdoor activities are December–February: average highs of 29 °C85 °F to 31 °C87 °F with 15 mm0.6 in to 59 mm2.3 in of precipitation per month.
The most challenging month is August, which is very wet (674 mm27 in) and humid (87% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Olongapo
- Wetter months (June–September) — highs 2984 to 30 °C86 °F, lows around 27 °C80 °F, about 542 mm21 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and a good rain jacket or umbrella and quick-drying shoes.
- Drier months (October–May) — highs 2985 to 33 °C92 °F, lows 2374 to 27 °C81 °F, about 85 mm3.4 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water.
How Olongapo compares
Compared with Angeles City, about 48 km to the northeast, Olongapo is on average 1.2 °C2.2 °F warmer and receives a similar amount of precipitation. The difference is largest in December (1.9 °C3.4 °F warmer).
Of the 62 places in the Philippines covered by World Climates, Olongapo is the warmest by annual mean temperature and the 12th wettest by annual precipitation. See all of them on the Philippines climate page.
Places in other countries with the most similar temperature and rainfall pattern (seasons shifted for the other hemisphere where needed): Probolinggo (Indonesia, Aw), Makassar (Ujung Pandang) (Indonesia, Aw) and Pasuruan (Indonesia, Aw).
Nearby places
- Angeles City 48 km · 27 °C80 °F · 2,743 mm108 in
- Malolos 57 km · 27 °C81 °F · 2,743 mm108 in
- Pandi 73 km · 27 °C80 °F · 2,834 mm112 in
- Metro Manila 79 km · 27 °C81 °F · 2,917 mm115 in
- Tarlac City 80 km · 27 °C81 °F · 2,753 mm108 in
- San Jose del Monte 82 km · 27 °C80 °F · 2,834 mm112 in
- Imus 83 km · 28 °C82 °F · 2,612 mm103 in
- Quezon City 85 km · 27 °C80 °F · 2,917 mm115 in
Frequently asked questions
What is the warmest month in Olongapo?
April is the warmest month in Olongapo, with an average high of 33 °C (92 °F) and an average low of 27 °C (80 °F).
What is the coldest month in Olongapo?
January is the coldest month, with an average high of 30 °C (85 °F) and an average low of 23 °C (74 °F).
When does it rain the most in Olongapo?
August is the wettest month with about 674 mm (26.5 in) of precipitation; January is the driest with about 15 mm (0.6 in).
What is the best time to visit Olongapo?
Judging by long-term averages, the most comfortable months are December–February.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 88 m, while Olongapo lies at about 11 m. Temperatures on this page were therefore adjusted by +0.5 °C0.9 °F using the standard lapse rate of 6.5 °C per 1,000 m.