San Ildefonso climate — normals and trends
San Ildefonso (Philippines) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 26.6 °C and it receives 2,008 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is May (28.5 °C on average) and the coldest is January (24.9 °C). Rainfall peaks in July.
San Ildefonso averages 0 frost days, 210 hot days (≥ 30 °C) and 188 rainy days per year.
San Ildefonso has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The hottest day of the period reached 37.2 °C (on 10 May 1979) and the coldest 16.4 °C (on 13 January 1971).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
San IldefonsoCentral Luzon
- coords
- 15.08°, 120.94°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.6°C
Average daily high
30.4°C
Average daily low
23.6°C
Annual rainfall
2,008mm
Sunshine / day
10.1h
Mean relative humidity
80%
Average peak wind
14.6km/h
Seasonal range
3.6°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
210 d/yr
Rainy days (≥ 1 mm)
188 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.2 °C
Average feels-like low
27.4 °C
Average peak gust
35.0 km/h
Tropical nights (≥ 20 °C)
358 d/yr
Solar radiation
18.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.68 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
37.2 °C
10 May 1979
Coldest day
16.4 °C
13 January 1971
Wettest day
198 mm
4 November 1967
Windiest day
64.9 km/h
26 December 1947
Strongest gust
119.5 km/h
14 November 1977
Hottest feels-like
44.7 °C
6 May 2020
Coldest feels-like
15.8 °C
10 January 1971
Sunniest day
12.3 h
5 June 1968
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 29.3 °C | +0.7 °C | 134 mm | +104 mm |
| Feb | 29.4 °C | -0.1 °C | 122 mm | +98 mm |
| Mar | 31.1 °C | 0.0 °C | 32 mm | +3 mm |
| Apr | 34.3 °C | +1.5 °C | 14 mm | -23 mm |
| May | 33.5 °C | +0.7 °C | 145 mm | -13 mm |
| Jun | 31.3 °C | +0.1 °C | 423 mm | +143 mm |
| Jul | 29.3 °C | -0.8 °C | 441 mm | +77 mm |
| Aug | 31.0 °C | +1.3 °C | 431 mm | +83 mm |
| Sep | 29.4 °C | -0.6 °C | 428 mm | +116 mm |
| Oct | 30.7 °C | +0.6 °C | 296 mm | +77 mm |
| Nov | 30.3 °C | +0.6 °C | 268 mm | +153 mm |
| Dec | 29.8 °C | +1.0 °C | 203 mm | +112 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of San Ildefonso?
San Ildefonso has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 26.6 °C and it receives 2,008 mm of precipitation per year.
What is the hottest day ever recorded in San Ildefonso?
The hottest day measured in San Ildefonso between 1940 and 2025 was 10 May 1979, reaching 37.2 °C.
What is the coldest day in San Ildefonso?
The coldest day measured in San Ildefonso between 1940 and 2025 was 13 January 1971, at 16.4 °C.
Does it snow in San Ildefonso?
Almost never: San Ildefonso sees virtually no snow, with about 0 frost days per year.
Has the climate of San Ildefonso warmed?
Yes: San Ildefonso warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in San Ildefonso?
The wettest day measured in San Ildefonso between 1940 and 2025 was 4 November 1967, with 198 mm of rain in 24 hours.
What was the windiest day in San Ildefonso?
The windiest day measured in San Ildefonso between 1940 and 2025 was 26 December 1947, with winds reaching 64.9 km/h.
What is the warmest month in San Ildefonso?
The warmest month in San Ildefonso is May (28.5 °C on average); the coldest is January (24.9 °C).
How much does it rain in San Ildefonso?
San Ildefonso receives on average 2,008 mm of precipitation per year, spread over about 188 rainy days.
Is it sunny in San Ildefonso?
San Ildefonso gets on average 10.1 hours of sunshine per day, roughly 3,687 hours per year over 1940-2025.
Are there tropical nights in San Ildefonso?
Yes: San Ildefonso has on average 358 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in San Ildefonso?
In San Ildefonso, between 1940 and 2025, the highest apparent temperature reached 44.7 °C on 6 May 2020, and the lowest was 15.8 °C on 10 January 1971.
Compare San Ildefonso with another city
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Nearby cities
The climate around San Ildefonso