Alcobaça climate — normals and trends
Alcobaça (Portugal) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 15.4 °C and it receives 696 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 (20.4 °C on average) and the coldest is January (10.4 °C). Rainfall peaks in November.
Alcobaça averages 0 frost days, 11 hot days (≥ 30 °C) and 99 rainy days per year.
Alcobaça has warmed by +1.0 °C between 1940 and 2025, or +0.12 °C per decade. This trend is statistically significant.
The hottest day of the period reached 41.7 °C (on 21 July 1941) and the coldest -1.6 °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
AlcobaçaLeiria District
- coords
- 39.55°, -8.98°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.4°C
Average daily high
19.0°C
Average daily low
12.3°C
Annual rainfall
696mm
Sunshine / day
10.4h
Mean relative humidity
78%
Average peak wind
21.7km/h
Seasonal range
10.0°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
11 d/yr
Rainy days (≥ 1 mm)
99 d/yr
Annual snowfall
0.2 cm
Average feels-like high
17.8 °C
Average feels-like low
10.5 °C
Average peak gust
40.6 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
+1.0 °C
since 1940
+0.1 °C per decade · r² = 0.33 · 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
41.7 °C
21 July 1941
Coldest day
-1.6 °C
11 February 1956
Wettest day
80 mm
13 November 2025
Windiest day
68.8 km/h
15 February 1941
Strongest gust
125.3 km/h
19 January 2013
Hottest feels-like
42.2 °C
21 July 1941
Coldest feels-like
-7.1 °C
11 February 1956
Snowiest day
4.8 cm
13 January 1945
Sunniest day
14.8 h
16 June 1940
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 | 15.1 °C | +1.9 °C | 156 mm | +69 mm |
| Feb | 15.7 °C | +1.6 °C | 53 mm | -25 mm |
| Mar | 15.6 °C | -0.5 °C | 198 mm | +121 mm |
| Apr | 18.9 °C | +1.4 °C | 138 mm | +73 mm |
| May | 21.1 °C | +1.4 °C | 40 mm | -15 mm |
| Jun | 25.2 °C | +2.5 °C | 8 mm | -15 mm |
| Jul | 26.2 °C | +1.5 °C | 5 mm | -2 mm |
| Aug | 26.4 °C | +1.3 °C | 2 mm | -7 mm |
| Sep | 23.7 °C | -0.2 °C | 26 mm | -9 mm |
| Oct | 22.7 °C | +2.0 °C | 68 mm | -11 mm |
| Nov | 16.7 °C | +0.3 °C | 239 mm | +147 mm |
| Dec | 14.2 °C | +0.4 °C | 150 mm | +60 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 Alcobaça?
Alcobaça has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 15.4 °C and it receives 696 mm of precipitation per year.
What is the hottest day ever recorded in Alcobaça?
The hottest day measured in Alcobaça between 1940 and 2025 was 21 July 1941, reaching 41.7 °C.
What is the coldest day in Alcobaça?
The coldest day measured in Alcobaça between 1940 and 2025 was 11 February 1956, at -1.6 °C.
Does it snow in Alcobaça?
Almost never: Alcobaça sees virtually no snow, with about 0 frost days per year.
Has the climate of Alcobaça warmed?
Yes: Alcobaça warmed by +1.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Alcobaça?
The wettest day measured in Alcobaça between 1940 and 2025 was 13 November 2025, with 80 mm of rain in 24 hours.
What was the windiest day in Alcobaça?
The windiest day measured in Alcobaça between 1940 and 2025 was 15 February 1941, with winds reaching 68.8 km/h.
What is the warmest month in Alcobaça?
The warmest month in Alcobaça is August (20.4 °C on average); the coldest is January (10.4 °C).
How much does it rain in Alcobaça?
Alcobaça receives on average 696 mm of precipitation per year, spread over about 99 rainy days.
Is it sunny in Alcobaça?
Alcobaça 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 Alcobaça?
The heaviest 24-hour snowfall measured in Alcobaça between 1940 and 2025 was 13 January 1945, with 4.8 cm.
Are there tropical nights in Alcobaça?
Yes: Alcobaça has on average 3 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Alcobaça?
In Alcobaça, between 1940 and 2025, the highest apparent temperature reached 42.2 °C on 21 July 1941, and the lowest was -7.1 °C on 11 February 1956.
Compare Alcobaça with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Alcobaça