Athens climate — normals and trends
Athens (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 16.3 °C and it receives 1,242 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 (26.6 °C on average) and the coldest is January (5.0 °C). Rainfall peaks in March.
Athens averages 34 frost days, 64 hot days (≥ 30 °C) and 120 rainy days per year.
Athens has warmed by +1.4 °C between 1940 and 2025, or +0.16 °C per decade. This trend is statistically significant.
The number of frost days there went from about 38 to 30 per year over the period.
The hottest day of the period reached 40.8 °C (on 30 June 2012) and the coldest -25.2 °C (on 21 January 1985).
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
AthensAlabama
- coords
- 34.80°, -86.97°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.3°C
Average daily high
20.8°C
Average daily low
12.1°C
Annual rainfall
1,242mm
Sunshine / day
9.1h
Mean relative humidity
72%
Average peak wind
15.1km/h
Seasonal range
21.6°C
Frost days (< 0 °C)
34 d/yr
Hot days (≥ 30 °C)
64 d/yr
Rainy days (≥ 1 mm)
120 d/yr
Annual snowfall
8.8 cm
Average feels-like high
20.8 °C
Average feels-like low
11.2 °C
Average peak gust
32.3 km/h
Tropical nights (≥ 20 °C)
96 d/yr
Solar radiation
16.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °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
40.8 °C
30 June 2012
Coldest day
-25.2 °C
21 January 1985
Wettest day
150 mm
5 September 2011
Windiest day
47.5 km/h
30 August 2005
Strongest gust
118.1 km/h
30 August 2005
Hottest feels-like
44.2 °C
13 August 2010
Coldest feels-like
-30.5 °C
21 January 1985
Snowiest day
17.7 cm
13 February 1960
Sunniest day
14.0 h
20 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 | 8.1 °C | -1.0 °C | 98 mm | -28 mm |
| Feb | 14.3 °C | +2.8 °C | 113 mm | -11 mm |
| Mar | 19.5 °C | +3.4 °C | 144 mm | -1 mm |
| Apr | 23.7 °C | +2.5 °C | 129 mm | +7 mm |
| May | 25.0 °C | -0.5 °C | 220 mm | +120 mm |
| Jun | 29.9 °C | +0.4 °C | 134 mm | +56 mm |
| Jul | 32.1 °C | +1.3 °C | 41 mm | -52 mm |
| Aug | 29.9 °C | -0.6 °C | 65 mm | -6 mm |
| Sep | 29.3 °C | +2.0 °C | 47 mm | -37 mm |
| Oct | 23.1 °C | +1.2 °C | 95 mm | +22 mm |
| Nov | 17.5 °C | +2.0 °C | 59 mm | -44 mm |
| Dec | 12.2 °C | +1.3 °C | 62 mm | -62 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 Athens?
Athens has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.3 °C and it receives 1,242 mm of precipitation per year.
What is the hottest day ever recorded in Athens?
The hottest day measured in Athens between 1940 and 2025 was 30 June 2012, reaching 40.8 °C.
What is the coldest day in Athens?
The coldest day measured in Athens between 1940 and 2025 was 21 January 1985, at -25.2 °C.
Does it snow in Athens?
Yes. Athens gets on average 8.8 cm of snow per year and has around 34 frost days.
Has the climate of Athens warmed?
Yes: Athens warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Athens?
The wettest day measured in Athens between 1940 and 2025 was 5 September 2011, with 150 mm of rain in 24 hours.
What was the windiest day in Athens?
The windiest day measured in Athens between 1940 and 2025 was 30 August 2005, with winds reaching 47.5 km/h.
What is the warmest month in Athens?
The warmest month in Athens is July (26.6 °C on average); the coldest is January (5.0 °C).
How much does it rain in Athens?
Athens receives on average 1,242 mm of precipitation per year, spread over about 120 rainy days.
Is it sunny in Athens?
Athens gets on average 9.1 hours of sunshine per day, roughly 3,322 hours per year over 1940-2025.
What is the biggest single-day snowfall in Athens?
The heaviest 24-hour snowfall measured in Athens between 1940 and 2025 was 13 February 1960, with 17.7 cm.
Are there tropical nights in Athens?
Yes: Athens has on average 96 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Athens?
In Athens, between 1940 and 2025, the highest apparent temperature reached 44.2 °C on 13 August 2010, and the lowest was -30.5 °C on 21 January 1985.
Compare Athens with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Athens