La Unión climate — normals and trends
La Unión has a temperate oceanic climate, averaging 17.5 °C annually with 3,185 mm of rain per year.
Climate normals · ERA5
La UniónAntioquia
- coords
- 5.97°, -75.36°
- period
- 1940–2025 · 86 yrs
The normals for this period
The average of every indicator across the whole window: temperature, water, sky, wind and notable days.
Mean daily temperature
17.5°C
Average daily high
22.9°C
Average daily low
13.6°C
Annual rainfall
3,185mm
Sunshine / day
9.5h
Mean relative humidity
84%
Average peak wind
6.5km/h
Seasonal range
1.0°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
287 d/yr
Annual snowfall
0.0 cm
Average feels-like high
25.2 °C
Average feels-like low
14.2 °C
Average peak gust
27.7 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
18.4 MJ/m²
Has the climate changed?
What the yearly averages say about warming here, and whether the slope is statistically solid.
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.70 · 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).
Climate month by month
How an average year unfolds: when it rains, when it turns hot, when the sun is out.
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
The most extreme days ever measured here, then the year-by-year detail.
Hottest day
30.6 °C
20 August 2015
Coldest day
7.5 °C
4 January 1968
Wettest day
99 mm
5 May 1955
Windiest day
16.6 km/h
15 August 2002
Strongest gust
58.0 km/h
30 July 1972
Hottest feels-like
31.7 °C
22 September 2023
Coldest feels-like
6.3 °C
4 January 1968
Sunniest day
12.0 h
23 June 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and compare it with the normal: warmer, drier, more extreme?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 23.5 °C | +1.2 °C | 110 mm | -79 mm |
| Feb | 22.2 °C | -0.3 °C | 359 mm | +132 mm |
| Mar | 22.9 °C | +0.2 °C | 311 mm | -19 mm |
| Apr | 22.3 °C | -0.4 °C | 489 mm | +79 mm |
| May | 22.4 °C | -0.5 °C | 266 mm | -79 mm |
| Jun | 22.4 °C | -0.9 °C | 166 mm | -2 mm |
| Jul | 24.2 °C | +0.1 °C | 29 mm | -71 mm |
| Aug | 23.0 °C | -1.4 °C | 137 mm | +7 mm |
| Sep | 23.0 °C | -0.6 °C | 205 mm | -17 mm |
| Oct | 21.1 °C | -1.3 °C | 350 mm | -61 mm |
| Nov | 21.2 °C | -0.9 °C | 380 mm | -24 mm |
| Dec | 21.0 °C | -1.2 °C | 282 mm | +31 mm |
The year's extremes
What was the weather like that day?
The weather actually measured on a given date, anywhere in the covered window.
Climate at a glance
What these normals say about the place, in a few sentences, and the notions needed to read them.
La Unión (Colombia) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 17.5 °C and it receives 3,185 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 August (18.1 °C on average) and the coldest is January (17.1 °C). Rainfall peaks in April.
La Unión averages 0 frost days, 0 hot days (≥ 30 °C) and 287 rainy days per year.
La Unión has warmed by +2.5 °C between 1940 and 2025, or +0.30 °C per decade. This trend is statistically significant.
The hottest day of the period reached 30.6 °C (on 20 August 2015) and the coldest 7.5 °C (on 4 January 1968).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Compare La Unión with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around La Unión
Other cities — Colombia
Frequently asked questions
What is the climate of La Unión?
La Unión has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 17.5 °C and it receives 3,185 mm of precipitation per year.
What is the hottest day ever recorded in La Unión?
The hottest day measured in La Unión between 1940 and 2025 was 20 August 2015, reaching 30.6 °C.
What is the coldest day in La Unión?
The coldest day measured in La Unión between 1940 and 2025 was 4 January 1968, at 7.5 °C.
Does it snow in La Unión?
Almost never: La Unión sees virtually no snow, with about 0 frost days per year.
Has the climate of La Unión warmed?
Yes: La Unión warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in La Unión?
The wettest day measured in La Unión between 1940 and 2025 was 5 May 1955, with 99 mm of rain in 24 hours.
What was the windiest day in La Unión?
The windiest day measured in La Unión between 1940 and 2025 was 15 August 2002, with winds reaching 16.6 km/h.
What is the warmest month in La Unión?
The warmest month in La Unión is August (18.1 °C on average); the coldest is January (17.1 °C).
How much does it rain in La Unión?
La Unión receives on average 3,185 mm of precipitation per year, spread over about 287 rainy days.
Is it sunny in La Unión?
La Unión gets on average 9.5 hours of sunshine per day, roughly 3,468 hours per year over 1940-2025.
Are there tropical nights in La Unión?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in La Unión.
What was the most extreme apparent temperature in La Unión?
In La Unión, between 1940 and 2025, the highest apparent temperature reached 31.7 °C on 22 September 2023, and the lowest was 6.3 °C on 4 January 1968.
These forecasts and records come from our own weather API. Developer documentation →