Chalcis climate — normals and trends
Chalcis (Greece) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 16.5 °C and it receives 486 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 (26.0 °C on average) and the coldest is January (7.8 °C). Rainfall peaks in December.
Chalcis averages 4 frost days, 49 hot days (≥ 30 °C) and 76 rainy days per year.
Chalcis has warmed by +1.5 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The hottest day of the period reached 42.0 °C (on 24 August 1958) and the coldest -10.0 °C (on 24 January 2004).
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
ChalcisCentral Greece
- coords
- 38.46°, 23.60°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.5°C
Average daily high
20.6°C
Average daily low
12.8°C
Annual rainfall
486mm
Sunshine / day
10.0h
Mean relative humidity
69%
Average peak wind
12.5km/h
Seasonal range
18.2°C
Frost days (< 0 °C)
4 d/yr
Hot days (≥ 30 °C)
49 d/yr
Rainy days (≥ 1 mm)
76 d/yr
Annual snowfall
17.2 cm
Average feels-like high
20.0 °C
Average feels-like low
12.0 °C
Average peak gust
34.3 km/h
Tropical nights (≥ 20 °C)
68 d/yr
Solar radiation
16.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.44 · 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
42.0 °C
24 August 1958
Coldest day
-10.0 °C
24 January 2004
Wettest day
107 mm
26 March 1998
Windiest day
35.5 km/h
29 April 1987
Strongest gust
104.8 km/h
15 February 2005
Hottest feels-like
44.5 °C
9 July 1988
Coldest feels-like
-14.1 °C
24 January 2004
Snowiest day
33.7 cm
26 March 1998
Sunniest day
14.7 h
25 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 | 14.1 °C | +3.0 °C | 55 mm | -17 mm |
| Feb | 10.5 °C | -1.7 °C | 56 mm | -2 mm |
| Mar | 17.1 °C | +2.7 °C | 49 mm | -6 mm |
| Apr | 18.0 °C | -0.6 °C | 56 mm | +22 mm |
| May | 23.7 °C | -0.1 °C | 34 mm | +6 mm |
| Jun | 29.4 °C | +0.8 °C | 8 mm | -8 mm |
| Jul | 33.0 °C | +2.6 °C | 7 mm | -4 mm |
| Aug | 29.8 °C | -0.3 °C | 13 mm | +3 mm |
| Sep | 27.1 °C | +0.4 °C | 11 mm | -16 mm |
| Oct | 21.0 °C | -0.6 °C | 39 mm | -10 mm |
| Nov | 19.4 °C | +2.5 °C | 37 mm | -15 mm |
| Dec | 14.2 °C | +1.6 °C | 72 mm | -3 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 Chalcis?
Chalcis has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 16.5 °C and it receives 486 mm of precipitation per year.
What is the hottest day ever recorded in Chalcis?
The hottest day measured in Chalcis between 1940 and 2025 was 24 August 1958, reaching 42.0 °C.
What is the coldest day in Chalcis?
The coldest day measured in Chalcis between 1940 and 2025 was 24 January 2004, at -10.0 °C.
Does it snow in Chalcis?
Yes. Chalcis gets on average 17.2 cm of snow per year and has around 4 frost days.
Has the climate of Chalcis warmed?
Yes: Chalcis warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Chalcis?
The wettest day measured in Chalcis between 1940 and 2025 was 26 March 1998, with 107 mm of rain in 24 hours.
What was the windiest day in Chalcis?
The windiest day measured in Chalcis between 1940 and 2025 was 29 April 1987, with winds reaching 35.5 km/h.
What is the warmest month in Chalcis?
The warmest month in Chalcis is July (26.0 °C on average); the coldest is January (7.8 °C).
How much does it rain in Chalcis?
Chalcis receives on average 486 mm of precipitation per year, spread over about 76 rainy days.
Is it sunny in Chalcis?
Chalcis 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 Chalcis?
The heaviest 24-hour snowfall measured in Chalcis between 1940 and 2025 was 26 March 1998, with 33.7 cm.
Are there tropical nights in Chalcis?
Yes: Chalcis has on average 68 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Chalcis?
In Chalcis, between 1940 and 2025, the highest apparent temperature reached 44.5 °C on 9 July 1988, and the lowest was -14.1 °C on 24 January 2004.
Compare Chalcis with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Chalcis