Calle Blancos climate — normals and trends
Calle Blancos (Costa Rica) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 18.0 °C and it receives 3,113 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 May (18.8 °C on average) and the coldest is January (16.8 °C). Rainfall peaks in October.
Calle Blancos averages 0 frost days, 0 hot days (≥ 30 °C) and 281 rainy days per year.
Calle Blancos 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 28.5 °C (on 12 April 1949) and the coldest 8.9 °C (on 28 December 1976).
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
Calle BlancosSan José
- coords
- 9.95°, -84.07°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
18.0°C
Average daily high
22.2°C
Average daily low
15.1°C
Annual rainfall
3,113mm
Sunshine / day
8.9h
Mean relative humidity
87%
Average peak wind
8.6km/h
Seasonal range
2.0°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
281 d/yr
Annual snowfall
0.0 cm
Average feels-like high
24.4 °C
Average feels-like low
15.7 °C
Average peak gust
35.0 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
16.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.51 · 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
28.5 °C
12 April 1949
Coldest day
8.9 °C
28 December 1976
Wettest day
242 mm
8 November 1967
Windiest day
24.2 km/h
11 February 1949
Strongest gust
76.3 km/h
11 February 1949
Hottest feels-like
33.7 °C
28 April 2015
Coldest feels-like
6.4 °C
27 February 1944
Sunniest day
12.6 h
15 June 1959
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 21.4 °C | +0.4 °C | 109 mm | +8 mm |
| Feb | 21.9 °C | +0.3 °C | 52 mm | -26 mm |
| Mar | 23.3 °C | +0.5 °C | 39 mm | -29 mm |
| Apr | 22.7 °C | -0.8 °C | 136 mm | +35 mm |
| May | 23.5 °C | +0.5 °C | 182 mm | -144 mm |
| Jun | 22.6 °C | +0.1 °C | 407 mm | +15 mm |
| Jul | 23.3 °C | +1.2 °C | 212 mm | -114 mm |
| Aug | 23.4 °C | +1.0 °C | 204 mm | -128 mm |
| Sep | 23.2 °C | +0.7 °C | 382 mm | -27 mm |
| Oct | 22.8 °C | +0.8 °C | 462 mm | -0 mm |
| Nov | 22.5 °C | +1.1 °C | 244 mm | -88 mm |
| Dec | 22.0 °C | +1.0 °C | 144 mm | -41 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 Calle Blancos?
Calle Blancos has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 18.0 °C and it receives 3,113 mm of precipitation per year.
What is the hottest day ever recorded in Calle Blancos?
The hottest day measured in Calle Blancos between 1940 and 2025 was 12 April 1949, reaching 28.5 °C.
What is the coldest day in Calle Blancos?
The coldest day measured in Calle Blancos between 1940 and 2025 was 28 December 1976, at 8.9 °C.
Does it snow in Calle Blancos?
Almost never: Calle Blancos sees virtually no snow, with about 0 frost days per year.
Has the climate of Calle Blancos warmed?
Yes: Calle Blancos warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Calle Blancos?
The wettest day measured in Calle Blancos between 1940 and 2025 was 8 November 1967, with 242 mm of rain in 24 hours.
What was the windiest day in Calle Blancos?
The windiest day measured in Calle Blancos between 1940 and 2025 was 11 February 1949, with winds reaching 24.2 km/h.
What is the warmest month in Calle Blancos?
The warmest month in Calle Blancos is May (18.8 °C on average); the coldest is January (16.8 °C).
How much does it rain in Calle Blancos?
Calle Blancos receives on average 3,113 mm of precipitation per year, spread over about 281 rainy days.
Is it sunny in Calle Blancos?
Calle Blancos gets on average 8.9 hours of sunshine per day, roughly 3,249 hours per year over 1940-2025.
Are there tropical nights in Calle Blancos?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Calle Blancos.
What was the most extreme apparent temperature in Calle Blancos?
In Calle Blancos, between 1940 and 2025, the highest apparent temperature reached 33.7 °C on 28 April 2015, and the lowest was 6.4 °C on 27 February 1944.
Compare Calle Blancos with another city
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Nearby cities
The climate around Calle Blancos