Eiras climate — normals and trends
Eiras (Portugal) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 14.9 °C and it receives 930 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 July (21.1 °C on average) and the coldest is January (9.0 °C). Rainfall peaks in December.
Eiras averages 5 frost days, 26 hot days (≥ 30 °C) and 106 rainy days per year.
Eiras has warmed by +1.2 °C between 1940 and 2025, or +0.14 °C per decade. This trend is statistically significant.
The number of frost days there went from about 9 to 1 per year over the period.
The hottest day of the period reached 41.5 °C (on 1 August 2003) and the coldest -5.1 °C (on 11 January 1941).
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
EirasCoimbra District
- coords
- 40.25°, -8.42°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.9°C
Average daily high
20.0°C
Average daily low
10.5°C
Annual rainfall
930mm
Sunshine / day
10.0h
Mean relative humidity
76%
Average peak wind
17.2km/h
Seasonal range
12.1°C
Frost days (< 0 °C)
5 d/yr
Hot days (≥ 30 °C)
26 d/yr
Rainy days (≥ 1 mm)
106 d/yr
Annual snowfall
0.1 cm
Average feels-like high
19.2 °C
Average feels-like low
9.1 °C
Average peak gust
36.4 km/h
Tropical nights (≥ 20 °C)
3 d/yr
Solar radiation
16.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.1 °C per decade · r² = 0.31 · 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
41.5 °C
1 August 2003
Coldest day
-5.1 °C
11 January 1941
Wettest day
88 mm
13 November 2025
Windiest day
54.7 km/h
30 December 1981
Strongest gust
120.6 km/h
30 December 1981
Hottest feels-like
42.9 °C
14 June 1981
Coldest feels-like
-9.5 °C
11 January 1941
Snowiest day
7.7 cm
23 February 1956
Sunniest day
14.9 h
14 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 | +2.0 °C | 222 mm | +105 mm |
| Feb | 16.0 °C | +1.6 °C | 57 mm | -53 mm |
| Mar | 16.5 °C | -0.3 °C | 188 mm | +86 mm |
| Apr | 19.6 °C | +1.2 °C | 171 mm | +82 mm |
| May | 22.4 °C | +1.4 °C | 64 mm | -10 mm |
| Jun | 27.6 °C | +3.0 °C | 5 mm | -26 mm |
| Jul | 29.5 °C | +2.1 °C | 4 mm | -6 mm |
| Aug | 29.3 °C | +1.7 °C | 2 mm | -11 mm |
| Sep | 25.2 °C | -0.4 °C | 40 mm | -6 mm |
| Oct | 23.8 °C | +2.5 °C | 132 mm | +29 mm |
| Nov | 16.6 °C | +0.3 °C | 297 mm | +181 mm |
| Dec | 14.1 °C | +0.5 °C | 168 mm | +48 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 Eiras?
Eiras has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 14.9 °C and it receives 930 mm of precipitation per year.
What is the hottest day ever recorded in Eiras?
The hottest day measured in Eiras between 1940 and 2025 was 1 August 2003, reaching 41.5 °C.
What is the coldest day in Eiras?
The coldest day measured in Eiras between 1940 and 2025 was 11 January 1941, at -5.1 °C.
Does it snow in Eiras?
Almost never: Eiras sees virtually no snow, with about 5 frost days per year.
Has the climate of Eiras warmed?
Yes: Eiras warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Eiras?
The wettest day measured in Eiras between 1940 and 2025 was 13 November 2025, with 88 mm of rain in 24 hours.
What was the windiest day in Eiras?
The windiest day measured in Eiras between 1940 and 2025 was 30 December 1981, with winds reaching 54.7 km/h.
What is the warmest month in Eiras?
The warmest month in Eiras is July (21.1 °C on average); the coldest is January (9.0 °C).
How much does it rain in Eiras?
Eiras receives on average 930 mm of precipitation per year, spread over about 106 rainy days.
Is it sunny in Eiras?
Eiras gets on average 10.0 hours of sunshine per day, roughly 3,650 hours per year over 1940-2025.
What is the biggest single-day snowfall in Eiras?
The heaviest 24-hour snowfall measured in Eiras between 1940 and 2025 was 23 February 1956, with 7.7 cm.
Are there tropical nights in Eiras?
Yes: Eiras has on average 3 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Eiras?
In Eiras, between 1940 and 2025, the highest apparent temperature reached 42.9 °C on 14 June 1981, and the lowest was -9.5 °C on 11 January 1941.
Compare Eiras with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Eiras