Juanjuí climate — normals and trends
Juanjuí (Peru) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 24.2 °C and it receives 1,982 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 September (24.9 °C on average) and the coldest is July (23.4 °C). Rainfall peaks in March.
Juanjuí averages 0 frost days, 127 hot days (≥ 30 °C) and 240 rainy days per year.
Juanjuí has warmed by +2.2 °C between 1940 and 2025, or +0.25 °C per decade. This trend is statistically significant.
The hottest day of the period reached 37.9 °C (on 19 October 2024) and the coldest 13.5 °C (on 2 August 1955).
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
JuanjuíSan Martín Department
- coords
- -7.18°, -76.73°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
24.2°C
Average daily high
28.9°C
Average daily low
20.6°C
Annual rainfall
1,982mm
Sunshine / day
10.0h
Mean relative humidity
84%
Average peak wind
5.4km/h
Seasonal range
1.5°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
127 d/yr
Rainy days (≥ 1 mm)
240 d/yr
Annual snowfall
0.0 cm
Average feels-like high
34.1 °C
Average feels-like low
24.0 °C
Average peak gust
21.8 km/h
Tropical nights (≥ 20 °C)
270 d/yr
Solar radiation
18.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.2 °C
since 1940
+0.3 °C per decade · r² = 0.71 · 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
37.9 °C
19 October 2024
Coldest day
13.5 °C
2 August 1955
Wettest day
156 mm
6 February 1971
Windiest day
13.6 km/h
10 September 2008
Strongest gust
44.6 km/h
4 January 1942
Hottest feels-like
43.8 °C
7 October 2023
Coldest feels-like
13.9 °C
2 August 1955
Sunniest day
12.3 h
27 January 1955
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 | 29.4 °C | +0.4 °C | 233 mm | +10 mm |
| Feb | 28.7 °C | 0.0 °C | 302 mm | +69 mm |
| Mar | 28.8 °C | +0.2 °C | 306 mm | +59 mm |
| Apr | 29.4 °C | +0.8 °C | 174 mm | -16 mm |
| May | 29.3 °C | +0.9 °C | 151 mm | +16 mm |
| Jun | 29.1 °C | +1.1 °C | 81 mm | +1 mm |
| Jul | 28.9 °C | +0.7 °C | 70 mm | +11 mm |
| Aug | 30.7 °C | +1.2 °C | 67 mm | +4 mm |
| Sep | 31.4 °C | +1.1 °C | 72 mm | -24 mm |
| Oct | 30.7 °C | +0.9 °C | 142 mm | -40 mm |
| Nov | 30.3 °C | +1.2 °C | 221 mm | -16 mm |
| Dec | 30.6 °C | +1.6 °C | 188 mm | -48 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 Juanjuí?
Juanjuí has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 24.2 °C and it receives 1,982 mm of precipitation per year.
What is the hottest day ever recorded in Juanjuí?
The hottest day measured in Juanjuí between 1940 and 2025 was 19 October 2024, reaching 37.9 °C.
What is the coldest day in Juanjuí?
The coldest day measured in Juanjuí between 1940 and 2025 was 2 August 1955, at 13.5 °C.
Does it snow in Juanjuí?
Almost never: Juanjuí sees virtually no snow, with about 0 frost days per year.
Has the climate of Juanjuí warmed?
Yes: Juanjuí warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Juanjuí?
The wettest day measured in Juanjuí between 1940 and 2025 was 6 February 1971, with 156 mm of rain in 24 hours.
What was the windiest day in Juanjuí?
The windiest day measured in Juanjuí between 1940 and 2025 was 10 September 2008, with winds reaching 13.6 km/h.
What is the warmest month in Juanjuí?
The warmest month in Juanjuí is September (24.9 °C on average); the coldest is July (23.4 °C).
How much does it rain in Juanjuí?
Juanjuí receives on average 1,982 mm of precipitation per year, spread over about 240 rainy days.
Is it sunny in Juanjuí?
Juanjuí gets on average 10.0 hours of sunshine per day, roughly 3,650 hours per year over 1940-2025.
Are there tropical nights in Juanjuí?
Yes: Juanjuí has on average 270 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Juanjuí?
In Juanjuí, between 1940 and 2025, the highest apparent temperature reached 43.8 °C on 7 October 2023, and the lowest was 13.9 °C on 2 August 1955.
Compare Juanjuí with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Juanjuí