Rosales climate — normals and trends
Rosales (Philippines) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 25.5 °C and it receives 2,317 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 April (27.3 °C on average) and the coldest is January (23.8 °C). Rainfall peaks in July.
Rosales averages 0 frost days, 202 hot days (≥ 30 °C) and 208 rainy days per year.
Rosales has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The hottest day of the period reached 38.5 °C (on 10 May 1979) and the coldest 13.0 °C (on 24 January 1978).
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
RosalesIlocos
- coords
- 15.89°, 120.63°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.5°C
Average daily high
30.2°C
Average daily low
21.7°C
Annual rainfall
2,317mm
Sunshine / day
9.9h
Mean relative humidity
79%
Average peak wind
9.1km/h
Seasonal range
3.5°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
202 d/yr
Rainy days (≥ 1 mm)
208 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.2 °C
Average feels-like low
24.9 °C
Average peak gust
30.0 km/h
Tropical nights (≥ 20 °C)
305 d/yr
Solar radiation
18.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.64 · 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
38.5 °C
10 May 1979
Coldest day
13.0 °C
24 January 1978
Wettest day
350 mm
25 May 1976
Windiest day
54.1 km/h
4 November 1967
Strongest gust
153.4 km/h
4 November 1967
Hottest feels-like
43.3 °C
9 May 2010
Coldest feels-like
12.6 °C
10 January 1971
Sunniest day
12.4 h
2 July 1967
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 | 29.6 °C | +0.6 °C | 58 mm | +33 mm |
| Feb | 30.7 °C | +0.6 °C | 59 mm | +34 mm |
| Mar | 32.6 °C | +1.0 °C | 83 mm | +40 mm |
| Apr | 33.8 °C | +1.0 °C | 50 mm | -20 mm |
| May | 33.5 °C | +1.1 °C | 260 mm | +78 mm |
| Jun | 30.7 °C | 0.0 °C | 391 mm | +82 mm |
| Jul | 28.5 °C | -1.0 °C | 767 mm | +320 mm |
| Aug | 29.9 °C | +1.0 °C | 505 mm | +88 mm |
| Sep | 29.1 °C | 0.0 °C | 562 mm | +208 mm |
| Oct | 30.6 °C | +0.9 °C | 553 mm | +286 mm |
| Nov | 30.2 °C | +0.4 °C | 325 mm | +205 mm |
| Dec | 29.8 °C | +0.7 °C | 107 mm | +49 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 Rosales?
Rosales has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 25.5 °C and it receives 2,317 mm of precipitation per year.
What is the hottest day ever recorded in Rosales?
The hottest day measured in Rosales between 1940 and 2025 was 10 May 1979, reaching 38.5 °C.
What is the coldest day in Rosales?
The coldest day measured in Rosales between 1940 and 2025 was 24 January 1978, at 13.0 °C.
Does it snow in Rosales?
Almost never: Rosales sees virtually no snow, with about 0 frost days per year.
Has the climate of Rosales warmed?
Yes: Rosales warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Rosales?
The wettest day measured in Rosales between 1940 and 2025 was 25 May 1976, with 350 mm of rain in 24 hours.
What was the windiest day in Rosales?
The windiest day measured in Rosales between 1940 and 2025 was 4 November 1967, with winds reaching 54.1 km/h.
What is the warmest month in Rosales?
The warmest month in Rosales is April (27.3 °C on average); the coldest is January (23.8 °C).
How much does it rain in Rosales?
Rosales receives on average 2,317 mm of precipitation per year, spread over about 208 rainy days.
Is it sunny in Rosales?
Rosales gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.
Are there tropical nights in Rosales?
Yes: Rosales has on average 305 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Rosales?
In Rosales, between 1940 and 2025, the highest apparent temperature reached 43.3 °C on 9 May 2010, and the lowest was 12.6 °C on 10 January 1971.
Compare Rosales with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Rosales