Caldas da Rainha climate — normals and trends
Caldas da Rainha (Portugal) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 15.7 °C and it receives 634 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 (19.8 °C on average) and the coldest is January (11.8 °C). Rainfall peaks in November.
Caldas da Rainha averages 0 frost days, 1 hot days (≥ 30 °C) and 95 rainy days per year.
Caldas da Rainha has warmed by +0.9 °C between 1940 and 2025, or +0.10 °C per decade. This trend is statistically significant.
The hottest day of the period reached 37.6 °C (on 21 July 1941) and the coldest 1.0 °C (on 11 February 1956).
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
Caldas da RainhaLeiria District
- coords
- 39.40°, -9.14°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.7°C
Average daily high
17.9°C
Average daily low
13.9°C
Annual rainfall
634mm
Sunshine / day
10.4h
Mean relative humidity
80%
Average peak wind
25.4km/h
Seasonal range
8.0°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
95 d/yr
Annual snowfall
0.1 cm
Average feels-like high
16.6 °C
Average feels-like low
11.5 °C
Average peak gust
40.3 km/h
Tropical nights (≥ 20 °C)
3 d/yr
Solar radiation
17.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.9 °C
since 1940
+0.1 °C per decade · r² = 0.29 · 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
37.6 °C
21 July 1941
Coldest day
1.0 °C
11 February 1956
Wettest day
63 mm
13 November 2025
Windiest day
80.4 km/h
15 February 1941
Strongest gust
126.0 km/h
19 January 2013
Hottest feels-like
38.7 °C
21 July 1941
Coldest feels-like
-5.6 °C
11 February 1956
Snowiest day
5.0 cm
13 January 1945
Sunniest day
14.8 h
16 June 1941
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 | 15.2 °C | +1.7 °C | 143 mm | +60 mm |
| Feb | 15.3 °C | +1.3 °C | 49 mm | -23 mm |
| Mar | 15.1 °C | -0.3 °C | 191 mm | +125 mm |
| Apr | 17.8 °C | +1.4 °C | 113 mm | +58 mm |
| May | 19.3 °C | +1.2 °C | 30 mm | -14 mm |
| Jun | 22.1 °C | +1.6 °C | 6 mm | -11 mm |
| Jul | 22.9 °C | +0.9 °C | 5 mm | -1 mm |
| Aug | 23.0 °C | +0.7 °C | 3 mm | -5 mm |
| Sep | 21.4 °C | -0.3 °C | 26 mm | -4 mm |
| Oct | 20.9 °C | +1.3 °C | 67 mm | -6 mm |
| Nov | 16.9 °C | +0.5 °C | 228 mm | +137 mm |
| Dec | 14.5 °C | +0.2 °C | 156 mm | +69 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 Caldas da Rainha?
Caldas da Rainha has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 15.7 °C and it receives 634 mm of precipitation per year.
What is the hottest day ever recorded in Caldas da Rainha?
The hottest day measured in Caldas da Rainha between 1940 and 2025 was 21 July 1941, reaching 37.6 °C.
What is the coldest day in Caldas da Rainha?
The coldest day measured in Caldas da Rainha between 1940 and 2025 was 11 February 1956, at 1.0 °C.
Does it snow in Caldas da Rainha?
Almost never: Caldas da Rainha sees virtually no snow, with about 0 frost days per year.
Has the climate of Caldas da Rainha warmed?
Yes: Caldas da Rainha warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Caldas da Rainha?
The wettest day measured in Caldas da Rainha between 1940 and 2025 was 13 November 2025, with 63 mm of rain in 24 hours.
What was the windiest day in Caldas da Rainha?
The windiest day measured in Caldas da Rainha between 1940 and 2025 was 15 February 1941, with winds reaching 80.4 km/h.
What is the warmest month in Caldas da Rainha?
The warmest month in Caldas da Rainha is August (19.8 °C on average); the coldest is January (11.8 °C).
How much does it rain in Caldas da Rainha?
Caldas da Rainha receives on average 634 mm of precipitation per year, spread over about 95 rainy days.
Is it sunny in Caldas da Rainha?
Caldas da Rainha gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.
What is the biggest single-day snowfall in Caldas da Rainha?
The heaviest 24-hour snowfall measured in Caldas da Rainha between 1940 and 2025 was 13 January 1945, with 5.0 cm.
Are there tropical nights in Caldas da Rainha?
Yes: Caldas da Rainha has on average 3 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Caldas da Rainha?
In Caldas da Rainha, between 1940 and 2025, the highest apparent temperature reached 38.7 °C on 21 July 1941, and the lowest was -5.6 °C on 11 February 1956.
Compare Caldas da Rainha with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Caldas da Rainha