Athens climate — normals and trends
Athens (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 12.2 °C and it receives 1,138 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 (23.8 °C on average) and the coldest is January (-0.3 °C). Rainfall peaks in May.
Athens averages 87 frost days, 36 hot days (≥ 30 °C) and 135 rainy days per year.
Athens has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The number of frost days there went from about 97 to 77 per year over the period.
The hottest day of the period reached 39.8 °C (on 14 July 1954) and the coldest -29.1 °C (on 19 January 1994).
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
AthensOhio
- coords
- 39.33°, -82.10°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
12.2°C
Average daily high
17.4°C
Average daily low
7.6°C
Annual rainfall
1,138mm
Sunshine / day
8.7h
Mean relative humidity
70%
Average peak wind
14.7km/h
Seasonal range
24.1°C
Frost days (< 0 °C)
87 d/yr
Hot days (≥ 30 °C)
36 d/yr
Rainy days (≥ 1 mm)
135 d/yr
Annual snowfall
47.8 cm
Average feels-like high
16.3 °C
Average feels-like low
5.5 °C
Average peak gust
35.3 km/h
Tropical nights (≥ 20 °C)
34 d/yr
Solar radiation
14.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.37 · 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
39.8 °C
14 July 1954
Coldest day
-29.1 °C
19 January 1994
Wettest day
149 mm
17 September 2004
Windiest day
42.4 km/h
25 March 1947
Strongest gust
103.7 km/h
25 February 1956
Hottest feels-like
43.6 °C
14 July 1954
Coldest feels-like
-34.7 °C
19 January 1994
Snowiest day
30.3 cm
4 April 1987
Sunniest day
14.8 h
19 June 1941
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 | 0.4 °C | -3.5 °C | 65 mm | -22 mm |
| Feb | 7.2 °C | +1.2 °C | 133 mm | +45 mm |
| Mar | 16.4 °C | +4.8 °C | 68 mm | -44 mm |
| Apr | 19.9 °C | +2.0 °C | 154 mm | +47 mm |
| May | 21.2 °C | -1.4 °C | 193 mm | +76 mm |
| Jun | 28.8 °C | +1.7 °C | 153 mm | +49 mm |
| Jul | 29.9 °C | +0.8 °C | 143 mm | +38 mm |
| Aug | 27.9 °C | -0.6 °C | 32 mm | -56 mm |
| Sep | 27.2 °C | +2.0 °C | 98 mm | +19 mm |
| Oct | 19.5 °C | +0.5 °C | 82 mm | +10 mm |
| Nov | 11.8 °C | -0.1 °C | 67 mm | -22 mm |
| Dec | 5.9 °C | -0.1 °C | 69 mm | -21 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 hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 12.2 °C and it receives 1,138 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 14 July 1954, reaching 39.8 °C.
What is the coldest day in Athens?
The coldest day measured in Athens between 1940 and 2025 was 19 January 1994, at -29.1 °C.
Does it snow in Athens?
Yes. Athens gets on average 47.8 cm of snow per year and has around 87 frost days.
Has the climate of Athens warmed?
Yes: Athens warmed by +1.7 °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 17 September 2004, with 149 mm of rain in 24 hours.
What was the windiest day in Athens?
The windiest day measured in Athens between 1940 and 2025 was 25 March 1947, with winds reaching 42.4 km/h.
What is the warmest month in Athens?
The warmest month in Athens is July (23.8 °C on average); the coldest is January (-0.3 °C).
How much does it rain in Athens?
Athens receives on average 1,138 mm of precipitation per year, spread over about 135 rainy days.
Is it sunny in Athens?
Athens gets on average 8.7 hours of sunshine per day, roughly 3,175 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 4 April 1987, with 30.3 cm.
Are there tropical nights in Athens?
Yes: Athens has on average 34 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 43.6 °C on 14 July 1954, and the lowest was -34.7 °C on 19 January 1994.
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