Yby Yaú climate — normals and trends
Yby Yaú (Paraguay) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 23.3 °C and it receives 1,626 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 January (26.5 °C on average) and the coldest is July (19.1 °C). Rainfall peaks in October.
Yby Yaú averages 0 frost days, 165 hot days (≥ 30 °C) and 146 rainy days per year.
Yby Yaú has warmed by +1.1 °C between 1940 and 2025, or +0.13 °C per decade. This trend is statistically significant.
The hottest day of the period reached 42.8 °C (on 25 November 1942) and the coldest -0.2 °C (on 19 July 1992).
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
Yby YaúConcepción
- coords
- -22.97°, -56.54°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
23.3°C
Average daily high
28.7°C
Average daily low
19.1°C
Annual rainfall
1,626mm
Sunshine / day
9.6h
Mean relative humidity
73%
Average peak wind
13.4km/h
Seasonal range
7.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
165 d/yr
Rainy days (≥ 1 mm)
146 d/yr
Annual snowfall
0.0 cm
Average feels-like high
31.4 °C
Average feels-like low
20.2 °C
Average peak gust
33.1 km/h
Tropical nights (≥ 20 °C)
191 d/yr
Solar radiation
17.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.26 · 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
42.8 °C
25 November 1942
Coldest day
-0.2 °C
19 July 1992
Wettest day
161 mm
12 December 1964
Windiest day
39.5 km/h
15 September 1956
Strongest gust
97.2 km/h
13 June 1997
Hottest feels-like
44.7 °C
12 December 1963
Coldest feels-like
-3.8 °C
18 July 1975
Sunniest day
13.4 h
3 January 1945
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 | 35.0 °C | +3.4 °C | 38 mm | -145 mm |
| Feb | 34.2 °C | +3.1 °C | 65 mm | -92 mm |
| Mar | 32.1 °C | +1.5 °C | 105 mm | -27 mm |
| Apr | 27.0 °C | -1.6 °C | 234 mm | +122 mm |
| May | 28.0 °C | +2.5 °C | 65 mm | -65 mm |
| Jun | 23.0 °C | -1.2 °C | 112 mm | +9 mm |
| Jul | 26.3 °C | +1.5 °C | 29 mm | -49 mm |
| Aug | 26.9 °C | -0.2 °C | 110 mm | +30 mm |
| Sep | 31.5 °C | +2.8 °C | 60 mm | -58 mm |
| Oct | 29.7 °C | -0.2 °C | 208 mm | +25 mm |
| Nov | 30.9 °C | +0.2 °C | 225 mm | +60 mm |
| Dec | 31.4 °C | +0.1 °C | 207 mm | +23 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 Yby Yaú?
Yby Yaú has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 23.3 °C and it receives 1,626 mm of precipitation per year.
What is the hottest day ever recorded in Yby Yaú?
The hottest day measured in Yby Yaú between 1940 and 2025 was 25 November 1942, reaching 42.8 °C.
What is the coldest day in Yby Yaú?
The coldest day measured in Yby Yaú between 1940 and 2025 was 19 July 1992, at -0.2 °C.
Does it snow in Yby Yaú?
Almost never: Yby Yaú sees virtually no snow, with about 0 frost days per year.
Has the climate of Yby Yaú warmed?
Yes: Yby Yaú warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Yby Yaú?
The wettest day measured in Yby Yaú between 1940 and 2025 was 12 December 1964, with 161 mm of rain in 24 hours.
What was the windiest day in Yby Yaú?
The windiest day measured in Yby Yaú between 1940 and 2025 was 15 September 1956, with winds reaching 39.5 km/h.
What is the warmest month in Yby Yaú?
The warmest month in Yby Yaú is January (26.5 °C on average); the coldest is July (19.1 °C).
How much does it rain in Yby Yaú?
Yby Yaú receives on average 1,626 mm of precipitation per year, spread over about 146 rainy days.
Is it sunny in Yby Yaú?
Yby Yaú gets on average 9.6 hours of sunshine per day, roughly 3,504 hours per year over 1940-2025.
Are there tropical nights in Yby Yaú?
Yes: Yby Yaú has on average 191 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Yby Yaú?
In Yby Yaú, between 1940 and 2025, the highest apparent temperature reached 44.7 °C on 12 December 1963, and the lowest was -3.8 °C on 18 July 1975.
Compare Yby Yaú with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Yby Yaú