Yauco climate — normals and trends
Yauco (Puerto Rico) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 25.1 °C and it receives 782 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 July (26.5 °C on average) and the coldest is January (23.8 °C). Rainfall peaks in September.
Yauco averages 0 frost days, 15 hot days (≥ 30 °C) and 157 rainy days per year.
Yauco has warmed by +1.0 °C between 1940 and 2025, or +0.12 °C per decade. This trend is statistically significant.
The hottest day of the period reached 32.2 °C (on 10 July 2007) and the coldest 17.6 °C (on 8 January 1956).
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
YaucoYauco
- coords
- 18.03°, -66.85°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.1°C
Average daily high
27.7°C
Average daily low
23.2°C
Annual rainfall
782mm
Sunshine / day
11.4h
Mean relative humidity
78%
Average peak wind
19.3km/h
Seasonal range
2.7°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
15 d/yr
Rainy days (≥ 1 mm)
157 d/yr
Annual snowfall
0.0 cm
Average feels-like high
30.7 °C
Average feels-like low
25.3 °C
Average peak gust
37.7 km/h
Tropical nights (≥ 20 °C)
361 d/yr
Solar radiation
21.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.0 °C
since 1940
+0.1 °C per decade · r² = 0.60 · 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
32.2 °C
10 July 2007
Coldest day
17.6 °C
8 January 1956
Wettest day
208 mm
20 September 2017
Windiest day
73.7 km/h
20 September 2017
Strongest gust
139.0 km/h
20 September 2017
Hottest feels-like
38.3 °C
19 August 2010
Coldest feels-like
15.6 °C
16 January 2000
Sunniest day
13.0 h
4 June 1940
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 | 27.9 °C | +1.2 °C | 12 mm | -5 mm |
| Feb | 27.8 °C | +1.1 °C | 22 mm | -1 mm |
| Mar | 26.9 °C | 0.0 °C | 67 mm | +34 mm |
| Apr | 27.5 °C | +0.4 °C | 133 mm | +70 mm |
| May | 27.8 °C | +0.3 °C | 156 mm | +52 mm |
| Jun | 28.5 °C | +0.1 °C | 23 mm | -38 mm |
| Jul | 28.9 °C | -0.1 °C | 52 mm | -9 mm |
| Aug | 28.8 °C | -0.2 °C | 118 mm | +29 mm |
| Sep | 28.6 °C | +0.1 °C | 163 mm | +42 mm |
| Oct | 28.5 °C | +0.5 °C | 107 mm | -7 mm |
| Nov | 28.4 °C | +0.9 °C | 40 mm | -31 mm |
| Dec | 27.7 °C | +0.6 °C | 15 mm | -9 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 Yauco?
Yauco has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 25.1 °C and it receives 782 mm of precipitation per year.
What is the hottest day ever recorded in Yauco?
The hottest day measured in Yauco between 1940 and 2025 was 10 July 2007, reaching 32.2 °C.
What is the coldest day in Yauco?
The coldest day measured in Yauco between 1940 and 2025 was 8 January 1956, at 17.6 °C.
Does it snow in Yauco?
Almost never: Yauco sees virtually no snow, with about 0 frost days per year.
Has the climate of Yauco warmed?
Yes: Yauco warmed by +1.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Yauco?
The wettest day measured in Yauco between 1940 and 2025 was 20 September 2017, with 208 mm of rain in 24 hours.
What was the windiest day in Yauco?
The windiest day measured in Yauco between 1940 and 2025 was 20 September 2017, with winds reaching 73.7 km/h.
What is the warmest month in Yauco?
The warmest month in Yauco is July (26.5 °C on average); the coldest is January (23.8 °C).
How much does it rain in Yauco?
Yauco receives on average 782 mm of precipitation per year, spread over about 157 rainy days.
Is it sunny in Yauco?
Yauco gets on average 11.4 hours of sunshine per day, roughly 4,161 hours per year over 1940-2025.
Are there tropical nights in Yauco?
Yes: Yauco has on average 361 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Yauco?
In Yauco, between 1940 and 2025, the highest apparent temperature reached 38.3 °C on 19 August 2010, and the lowest was 15.6 °C on 16 January 2000.
Compare Yauco with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Yauco