Arganil climate — normals and trends
Arganil (Portugal) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 13.6 °C and it receives 1,064 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 (20.9 °C on average) and the coldest is January (7.0 °C). Rainfall peaks in December.
Arganil averages 13 frost days, 25 hot days (≥ 30 °C) and 112 rainy days per year.
Arganil has warmed by +1.2 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.
The number of frost days there went from about 20 to 6 per year over the period.
The hottest day of the period reached 39.4 °C (on 23 July 1945) and the coldest -7.5 °C (on 4 February 1963).
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
ArganilCoimbra District
- coords
- 40.22°, -8.05°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
13.6°C
Average daily high
18.6°C
Average daily low
9.1°C
Annual rainfall
1,064mm
Sunshine / day
9.8h
Mean relative humidity
75%
Average peak wind
15.0km/h
Seasonal range
13.9°C
Frost days (< 0 °C)
13 d/yr
Hot days (≥ 30 °C)
25 d/yr
Rainy days (≥ 1 mm)
112 d/yr
Annual snowfall
1.7 cm
Average feels-like high
17.6 °C
Average feels-like low
7.5 °C
Average peak gust
35.6 km/h
Tropical nights (≥ 20 °C)
3 d/yr
Solar radiation
15.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.2 °C per decade · r² = 0.18 · 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
39.4 °C
23 July 1945
Coldest day
-7.5 °C
4 February 1963
Wettest day
88 mm
24 November 2006
Windiest day
48.6 km/h
30 December 1981
Strongest gust
128.9 km/h
30 December 1981
Hottest feels-like
40.6 °C
29 June 2025
Coldest feels-like
-11.4 °C
4 February 1963
Snowiest day
21.6 cm
23 February 1956
Sunniest day
14.9 h
14 June 1940
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 | 13.0 °C | +2.0 °C | 261 mm | +130 mm |
| Feb | 14.1 °C | +1.7 °C | 59 mm | -62 mm |
| Mar | 14.5 °C | -0.5 °C | 210 mm | +96 mm |
| Apr | 18.1 °C | +1.3 °C | 173 mm | +72 mm |
| May | 21.4 °C | +1.7 °C | 69 mm | -19 mm |
| Jun | 28.2 °C | +4.3 °C | 10 mm | -34 mm |
| Jul | 29.7 °C | +2.4 °C | 6 mm | -9 mm |
| Aug | 30.6 °C | +3.1 °C | 3 mm | -13 mm |
| Sep | 24.7 °C | +0.1 °C | 37 mm | -17 mm |
| Oct | 22.5 °C | +2.9 °C | 151 mm | +36 mm |
| Nov | 14.6 °C | +0.3 °C | 290 mm | +162 mm |
| Dec | 11.9 °C | +0.4 °C | 159 mm | +23 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 Arganil?
Arganil has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 13.6 °C and it receives 1,064 mm of precipitation per year.
What is the hottest day ever recorded in Arganil?
The hottest day measured in Arganil between 1940 and 2025 was 23 July 1945, reaching 39.4 °C.
What is the coldest day in Arganil?
The coldest day measured in Arganil between 1940 and 2025 was 4 February 1963, at -7.5 °C.
Does it snow in Arganil?
Yes. Arganil gets on average 1.7 cm of snow per year and has around 13 frost days.
Has the climate of Arganil warmed?
Yes: Arganil warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Arganil?
The wettest day measured in Arganil between 1940 and 2025 was 24 November 2006, with 88 mm of rain in 24 hours.
What was the windiest day in Arganil?
The windiest day measured in Arganil between 1940 and 2025 was 30 December 1981, with winds reaching 48.6 km/h.
What is the warmest month in Arganil?
The warmest month in Arganil is August (20.9 °C on average); the coldest is January (7.0 °C).
How much does it rain in Arganil?
Arganil receives on average 1,064 mm of precipitation per year, spread over about 112 rainy days.
Is it sunny in Arganil?
Arganil gets on average 9.8 hours of sunshine per day, roughly 3,577 hours per year over 1940-2025.
What is the biggest single-day snowfall in Arganil?
The heaviest 24-hour snowfall measured in Arganil between 1940 and 2025 was 23 February 1956, with 21.6 cm.
Are there tropical nights in Arganil?
Yes: Arganil has on average 3 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Arganil?
In Arganil, between 1940 and 2025, the highest apparent temperature reached 40.6 °C on 29 June 2025, and the lowest was -11.4 °C on 4 February 1963.
Compare Arganil with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Arganil