Horta climate — normals and trends
Horta (Portugal) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 17.6 °C and it receives 857 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 (22.0 °C on average) and the coldest is February (14.6 °C). Rainfall peaks in December.
Horta averages 0 frost days, 0 hot days (≥ 30 °C) and 129 rainy days per year.
Horta 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 25.9 °C (on 23 August 2024) and the coldest 5.8 °C (on 3 March 1991).
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
HortaAzores
- coords
- 38.54°, -28.63°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.6°C
Average daily high
18.3°C
Average daily low
17.0°C
Annual rainfall
857mm
Sunshine / day
10.0h
Mean relative humidity
79%
Average peak wind
33.2km/h
Seasonal range
7.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
129 d/yr
Annual snowfall
0.0 cm
Average feels-like high
17.0 °C
Average feels-like low
14.0 °C
Average peak gust
45.1 km/h
Tropical nights (≥ 20 °C)
80 d/yr
Solar radiation
15.6 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
25.9 °C
23 August 2024
Coldest day
5.8 °C
3 March 1991
Wettest day
91 mm
4 November 1969
Windiest day
102.6 km/h
15 February 1986
Strongest gust
157.3 km/h
15 February 1986
Hottest feels-like
30.4 °C
15 August 2024
Coldest feels-like
-5.0 °C
19 February 1966
Sunniest day
14.1 h
16 June 2020
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 | 18.0 °C | +2.0 °C | 179 mm | +70 mm |
| Feb | 16.6 °C | +1.2 °C | 124 mm | +29 mm |
| Mar | 15.2 °C | -0.2 °C | 86 mm | -8 mm |
| Apr | 15.8 °C | 0.0 °C | 70 mm | +9 mm |
| May | 17.6 °C | +0.6 °C | 70 mm | +16 mm |
| Jun | 19.8 °C | +0.7 °C | 29 mm | -7 mm |
| Jul | 21.7 °C | +0.3 °C | 13 mm | -12 mm |
| Aug | 23.3 °C | +0.7 °C | 34 mm | +1 mm |
| Sep | 22.2 °C | +0.3 °C | 70 mm | +11 mm |
| Oct | 21.3 °C | +1.2 °C | 86 mm | -2 mm |
| Nov | 18.4 °C | +0.2 °C | 65 mm | -31 mm |
| Dec | 17.5 °C | +0.6 °C | 161 mm | +50 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 Horta?
Horta has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 17.6 °C and it receives 857 mm of precipitation per year.
What is the hottest day ever recorded in Horta?
The hottest day measured in Horta between 1940 and 2025 was 23 August 2024, reaching 25.9 °C.
What is the coldest day in Horta?
The coldest day measured in Horta between 1940 and 2025 was 3 March 1991, at 5.8 °C.
Does it snow in Horta?
Almost never: Horta sees virtually no snow, with about 0 frost days per year.
Has the climate of Horta warmed?
Yes: Horta warmed by +0.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Horta?
The wettest day measured in Horta between 1940 and 2025 was 4 November 1969, with 91 mm of rain in 24 hours.
What was the windiest day in Horta?
The windiest day measured in Horta between 1940 and 2025 was 15 February 1986, with winds reaching 102.6 km/h.
What is the warmest month in Horta?
The warmest month in Horta is August (22.0 °C on average); the coldest is February (14.6 °C).
How much does it rain in Horta?
Horta receives on average 857 mm of precipitation per year, spread over about 129 rainy days.
Is it sunny in Horta?
Horta gets on average 10.0 hours of sunshine per day, roughly 3,650 hours per year over 1940-2025.
Are there tropical nights in Horta?
Yes: Horta has on average 80 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Horta?
In Horta, between 1940 and 2025, the highest apparent temperature reached 30.4 °C on 15 August 2024, and the lowest was -5.0 °C on 19 February 1966.
Compare Horta with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Horta