Olhão climate — normals and trends
Olhão (Portugal) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 17.4 °C and it receives 480 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 (22.7 °C on average) and the coldest is January (13.0 °C). Rainfall peaks in December.
Olhão averages 0 frost days, 1 hot days (≥ 30 °C) and 59 rainy days per year.
Olhão has warmed by +0.8 °C between 1940 and 2025, or +0.09 °C per decade. This trend is statistically significant.
The hottest day of the period reached 33.5 °C (on 25 July 2022) and the coldest 3.1 °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
OlhãoFaro District
- coords
- 37.03°, -7.84°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.4°C
Average daily high
19.1°C
Average daily low
15.7°C
Annual rainfall
480mm
Sunshine / day
10.9h
Mean relative humidity
74%
Average peak wind
25.3km/h
Seasonal range
9.7°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
59 d/yr
Annual snowfall
0.0 cm
Average feels-like high
18.7 °C
Average feels-like low
13.6 °C
Average peak gust
35.9 km/h
Tropical nights (≥ 20 °C)
61 d/yr
Solar radiation
18.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.8 °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
33.5 °C
25 July 2022
Coldest day
3.1 °C
11 February 1956
Wettest day
68 mm
9 November 1983
Windiest day
77.2 km/h
15 February 1941
Strongest gust
129.2 km/h
23 December 2009
Hottest feels-like
36.1 °C
4 August 2017
Coldest feels-like
-4.7 °C
11 February 1956
Snowiest day
0.8 cm
2 February 1954
Sunniest day
14.5 h
20 June 2025
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 | 15.9 °C | +1.4 °C | 110 mm | +46 mm |
| Feb | 15.5 °C | +0.7 °C | 45 mm | -11 mm |
| Mar | 15.6 °C | -0.3 °C | 147 mm | +91 mm |
| Apr | 17.8 °C | +0.7 °C | 50 mm | +13 mm |
| May | 20.2 °C | +1.0 °C | 19 mm | -3 mm |
| Jun | 24.5 °C | +2.6 °C | 0 mm | -6 mm |
| Jul | 24.8 °C | +0.4 °C | 0 mm | -1 mm |
| Aug | 25.8 °C | +1.2 °C | 0 mm | -2 mm |
| Sep | 23.2 °C | +0.3 °C | 1 mm | -15 mm |
| Oct | 21.9 °C | +1.4 °C | 35 mm | -25 mm |
| Nov | 18.2 °C | +0.6 °C | 82 mm | +5 mm |
| Dec | 15.3 °C | -0.1 °C | 131 mm | +47 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 Olhão?
Olhão has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 17.4 °C and it receives 480 mm of precipitation per year.
What is the hottest day ever recorded in Olhão?
The hottest day measured in Olhão between 1940 and 2025 was 25 July 2022, reaching 33.5 °C.
What is the coldest day in Olhão?
The coldest day measured in Olhão between 1940 and 2025 was 11 February 1956, at 3.1 °C.
Does it snow in Olhão?
Almost never: Olhão sees virtually no snow, with about 0 frost days per year.
Has the climate of Olhão warmed?
Yes: Olhão warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Olhão?
The wettest day measured in Olhão between 1940 and 2025 was 9 November 1983, with 68 mm of rain in 24 hours.
What was the windiest day in Olhão?
The windiest day measured in Olhão between 1940 and 2025 was 15 February 1941, with winds reaching 77.2 km/h.
What is the warmest month in Olhão?
The warmest month in Olhão is August (22.7 °C on average); the coldest is January (13.0 °C).
How much does it rain in Olhão?
Olhão receives on average 480 mm of precipitation per year, spread over about 59 rainy days.
Is it sunny in Olhão?
Olhão gets on average 10.9 hours of sunshine per day, roughly 3,979 hours per year over 1940-2025.
What is the biggest single-day snowfall in Olhão?
The heaviest 24-hour snowfall measured in Olhão between 1940 and 2025 was 2 February 1954, with 0.8 cm.
Are there tropical nights in Olhão?
Yes: Olhão has on average 61 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Olhão?
In Olhão, between 1940 and 2025, the highest apparent temperature reached 36.1 °C on 4 August 2017, and the lowest was -4.7 °C on 11 February 1956.
Compare Olhão with another city
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Nearby cities
The climate around Olhão