Belen climate — normals and trends
Belen (Argentina) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 17.1 °C and it receives 718 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 (22.4 °C on average) and the coldest is July (11.0 °C). Rainfall peaks in January.
Belen averages 3 frost days, 39 hot days (≥ 30 °C) and 102 rainy days per year.
Belen has warmed by +2.0 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.
The number of frost days there went from about 2 to 4 per year over the period.
The hottest day of the period reached 39.6 °C (on 18 December 1975) and the coldest -9.6 °C (on 19 July 2010).
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
BelenCatamarca
- coords
- -27.65°, -67.03°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.1°C
Average daily high
22.8°C
Average daily low
12.0°C
Annual rainfall
718mm
Sunshine / day
11.0h
Mean relative humidity
58%
Average peak wind
10.1km/h
Seasonal range
11.4°C
Frost days (< 0 °C)
3 d/yr
Hot days (≥ 30 °C)
39 d/yr
Rainy days (≥ 1 mm)
102 d/yr
Annual snowfall
3.0 cm
Average feels-like high
22.7 °C
Average feels-like low
11.0 °C
Average peak gust
27.3 km/h
Tropical nights (≥ 20 °C)
10 d/yr
Solar radiation
20.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.56 · 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
39.6 °C
18 December 1975
Coldest day
-9.6 °C
19 July 2010
Wettest day
92 mm
18 November 1943
Windiest day
33.8 km/h
1 December 1974
Strongest gust
74.9 km/h
19 November 2015
Hottest feels-like
41.3 °C
27 January 1998
Coldest feels-like
-14.9 °C
19 July 2010
Snowiest day
13.9 cm
31 August 2005
Sunniest day
13.5 h
27 November 2025
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 | 31.3 °C | +3.7 °C | 22 mm | -95 mm |
| Feb | 33.4 °C | +7.1 °C | 35 mm | -73 mm |
| Mar | 26.3 °C | +1.5 °C | 70 mm | -26 mm |
| Apr | 22.5 °C | +0.3 °C | 7 mm | -46 mm |
| May | 22.0 °C | +2.4 °C | 7 mm | -22 mm |
| Jun | 16.8 °C | -0.7 °C | 21 mm | +4 mm |
| Jul | 18.6 °C | +1.2 °C | 8 mm | -10 mm |
| Aug | 19.3 °C | 0.0 °C | 34 mm | +12 mm |
| Sep | 24.3 °C | +3.1 °C | 2 mm | -37 mm |
| Oct | 25.9 °C | +2.0 °C | 22 mm | -36 mm |
| Nov | 29.0 °C | +3.0 °C | 8 mm | -71 mm |
| Dec | 29.0 °C | +1.3 °C | 103 mm | +20 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 Belen?
Belen has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.1 °C and it receives 718 mm of precipitation per year.
What is the hottest day ever recorded in Belen?
The hottest day measured in Belen between 1940 and 2025 was 18 December 1975, reaching 39.6 °C.
What is the coldest day in Belen?
The coldest day measured in Belen between 1940 and 2025 was 19 July 2010, at -9.6 °C.
Does it snow in Belen?
Yes. Belen gets on average 3.0 cm of snow per year and has around 3 frost days.
Has the climate of Belen warmed?
Yes: Belen warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Belen?
The wettest day measured in Belen between 1940 and 2025 was 18 November 1943, with 92 mm of rain in 24 hours.
What was the windiest day in Belen?
The windiest day measured in Belen between 1940 and 2025 was 1 December 1974, with winds reaching 33.8 km/h.
What is the warmest month in Belen?
The warmest month in Belen is January (22.4 °C on average); the coldest is July (11.0 °C).
How much does it rain in Belen?
Belen receives on average 718 mm of precipitation per year, spread over about 102 rainy days.
Is it sunny in Belen?
Belen gets on average 11.0 hours of sunshine per day, roughly 4,015 hours per year over 1940-2025.
What is the biggest single-day snowfall in Belen?
The heaviest 24-hour snowfall measured in Belen between 1940 and 2025 was 31 August 2005, with 13.9 cm.
Are there tropical nights in Belen?
Yes: Belen has on average 10 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Belen?
In Belen, between 1940 and 2025, the highest apparent temperature reached 41.3 °C on 27 January 1998, and the lowest was -14.9 °C on 19 July 2010.
Compare Belen with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Belen