Olympia climate — normals and trends
Olympia (Greece) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 14.6 °C and it receives 1,028 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 (24.0 °C on average) and the coldest is January (6.3 °C). Rainfall peaks in December.
Olympia averages 17 frost days, 43 hot days (≥ 30 °C) and 119 rainy days per year.
Olympia has warmed by +0.9 °C between 1940 and 2025, or +0.11 °C per decade. This trend is statistically significant.
The hottest day of the period reached 41.2 °C (on 7 July 1988) and the coldest -11.6 °C (on 2 January 1942).
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
OlympiaWest Greece
- coords
- 37.65°, 21.63°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.6°C
Average daily high
19.7°C
Average daily low
10.1°C
Annual rainfall
1,028mm
Sunshine / day
10.2h
Mean relative humidity
73%
Average peak wind
12.9km/h
Seasonal range
17.7°C
Frost days (< 0 °C)
17 d/yr
Hot days (≥ 30 °C)
43 d/yr
Rainy days (≥ 1 mm)
119 d/yr
Annual snowfall
16.9 cm
Average feels-like high
19.1 °C
Average feels-like low
8.7 °C
Average peak gust
35.9 km/h
Tropical nights (≥ 20 °C)
12 d/yr
Solar radiation
16.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.9 °C
since 1940
+0.1 °C per decade · r² = 0.20 · 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
41.2 °C
7 July 1988
Coldest day
-11.6 °C
2 January 1942
Wettest day
91 mm
18 September 2020
Windiest day
40.0 km/h
17 March 2003
Strongest gust
107.6 km/h
28 February 1990
Hottest feels-like
43.6 °C
7 July 1988
Coldest feels-like
-16.2 °C
2 January 1942
Snowiest day
11.3 cm
5 January 1946
Sunniest day
14.5 h
18 June 2012
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 | 13.4 °C | +3.0 °C | 78 mm | -64 mm |
| Feb | 11.3 °C | 0.0 °C | 59 mm | -62 mm |
| Mar | 16.8 °C | +3.1 °C | 48 mm | -59 mm |
| Apr | 18.0 °C | +0.6 °C | 77 mm | -12 mm |
| May | 23.1 °C | +1.0 °C | 33 mm | -41 mm |
| Jun | 30.8 °C | +4.1 °C | 35 mm | -6 mm |
| Jul | 32.9 °C | +2.9 °C | 1 mm | -17 mm |
| Aug | 31.8 °C | +1.5 °C | 10 mm | -10 mm |
| Sep | 28.2 °C | +2.0 °C | 61 mm | +12 mm |
| Oct | 19.0 °C | -2.0 °C | 187 mm | +100 mm |
| Nov | 17.5 °C | +1.6 °C | 168 mm | +34 mm |
| Dec | 13.8 °C | +2.0 °C | 82 mm | -66 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 Olympia?
Olympia has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 14.6 °C and it receives 1,028 mm of precipitation per year.
What is the hottest day ever recorded in Olympia?
The hottest day measured in Olympia between 1940 and 2025 was 7 July 1988, reaching 41.2 °C.
What is the coldest day in Olympia?
The coldest day measured in Olympia between 1940 and 2025 was 2 January 1942, at -11.6 °C.
Does it snow in Olympia?
Yes. Olympia gets on average 16.9 cm of snow per year and has around 17 frost days.
Has the climate of Olympia warmed?
Yes: Olympia warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Olympia?
The wettest day measured in Olympia between 1940 and 2025 was 18 September 2020, with 91 mm of rain in 24 hours.
What was the windiest day in Olympia?
The windiest day measured in Olympia between 1940 and 2025 was 17 March 2003, with winds reaching 40.0 km/h.
What is the warmest month in Olympia?
The warmest month in Olympia is August (24.0 °C on average); the coldest is January (6.3 °C).
How much does it rain in Olympia?
Olympia receives on average 1,028 mm of precipitation per year, spread over about 119 rainy days.
Is it sunny in Olympia?
Olympia gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.
What is the biggest single-day snowfall in Olympia?
The heaviest 24-hour snowfall measured in Olympia between 1940 and 2025 was 5 January 1946, with 11.3 cm.
Are there tropical nights in Olympia?
Yes: Olympia has on average 12 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Olympia?
In Olympia, between 1940 and 2025, the highest apparent temperature reached 43.6 °C on 7 July 1988, and the lowest was -16.2 °C on 2 January 1942.
Compare Olympia with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Olympia