Sintra climate — normals and trends
Sintra (Portugal) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 15.8 °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 (18.7 °C on average) and the coldest is February (12.9 °C). Rainfall peaks in December.
Sintra averages 0 frost days, 0 hot days (≥ 30 °C) and 84 rainy days per year.
Sintra has warmed by +0.5 °C between 1940 and 2025, or +0.06 °C per decade. This trend is statistically significant.
The hottest day of the period reached 29.0 °C (on 21 July 1941) and the coldest 2.1 °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
SintraLisbon District
- coords
- 38.80°, -9.38°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.8°C
Average daily high
16.5°C
Average daily low
15.0°C
Annual rainfall
634mm
Sunshine / day
10.6h
Mean relative humidity
82%
Average peak wind
30.9km/h
Seasonal range
5.8°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
84 d/yr
Annual snowfall
0.0 cm
Average feels-like high
15.3 °C
Average feels-like low
11.8 °C
Average peak gust
41.9 km/h
Tropical nights (≥ 20 °C)
2 d/yr
Solar radiation
17.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.5 °C
since 1940
+0.1 °C per decade · r² = 0.15 · 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
29.0 °C
21 July 1941
Coldest day
2.1 °C
11 February 1956
Wettest day
85 mm
14 September 2021
Windiest day
88.0 km/h
15 February 1941
Strongest gust
128.2 km/h
15 February 1941
Hottest feels-like
31.1 °C
21 July 1941
Coldest feels-like
-5.8 °C
11 February 1956
Snowiest day
2.0 cm
13 January 1945
Sunniest day
14.7 h
13 June 2024
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 | 15.5 °C | +1.5 °C | 131 mm | +41 mm |
| Feb | 14.7 °C | +0.8 °C | 67 mm | -13 mm |
| Mar | 14.6 °C | +0.2 °C | 190 mm | +121 mm |
| Apr | 16.2 °C | +1.1 °C | 104 mm | +53 mm |
| May | 16.7 °C | +0.5 °C | 35 mm | -2 mm |
| Jun | 18.3 °C | +0.6 °C | 2 mm | -8 mm |
| Jul | 18.9 °C | +0.2 °C | 0 mm | -2 mm |
| Aug | 19.2 °C | 0.0 °C | 0 mm | -4 mm |
| Sep | 18.6 °C | -0.6 °C | 13 mm | -11 mm |
| Oct | 18.6 °C | +0.2 °C | 48 mm | -21 mm |
| Nov | 17.1 °C | +0.6 °C | 228 mm | +131 mm |
| Dec | 15.1 °C | +0.2 °C | 178 mm | +78 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 Sintra?
Sintra has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 15.8 °C and it receives 634 mm of precipitation per year.
What is the hottest day ever recorded in Sintra?
The hottest day measured in Sintra between 1940 and 2025 was 21 July 1941, reaching 29.0 °C.
What is the coldest day in Sintra?
The coldest day measured in Sintra between 1940 and 2025 was 11 February 1956, at 2.1 °C.
Does it snow in Sintra?
Almost never: Sintra sees virtually no snow, with about 0 frost days per year.
Has the climate of Sintra warmed?
Yes: Sintra warmed by +0.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sintra?
The wettest day measured in Sintra between 1940 and 2025 was 14 September 2021, with 85 mm of rain in 24 hours.
What was the windiest day in Sintra?
The windiest day measured in Sintra between 1940 and 2025 was 15 February 1941, with winds reaching 88.0 km/h.
What is the warmest month in Sintra?
The warmest month in Sintra is August (18.7 °C on average); the coldest is February (12.9 °C).
How much does it rain in Sintra?
Sintra receives on average 634 mm of precipitation per year, spread over about 84 rainy days.
Is it sunny in Sintra?
Sintra gets on average 10.6 hours of sunshine per day, roughly 3,869 hours per year over 1940-2025.
What is the biggest single-day snowfall in Sintra?
The heaviest 24-hour snowfall measured in Sintra between 1940 and 2025 was 13 January 1945, with 2.0 cm.
Are there tropical nights in Sintra?
Yes: Sintra has on average 2 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sintra?
In Sintra, between 1940 and 2025, the highest apparent temperature reached 31.1 °C on 21 July 1941, and the lowest was -5.8 °C on 11 February 1956.
Compare Sintra with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sintra