Nea Ionia climate — normals and trends
Nea Ionia (Greece) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 15.8 °C and it receives 817 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 (24.7 °C on average) and the coldest is January (7.5 °C). Rainfall peaks in December.
Nea Ionia averages 3 frost days, 8 hot days (≥ 30 °C) and 95 rainy days per year.
Nea Ionia has warmed by +1.3 °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 4 to 2 per year over the period.
The hottest day of the period reached 38.1 °C (on 26 July 2023) and the coldest -7.7 °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
Nea IoniaThessaly
- coords
- 39.38°, 22.93°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.8°C
Average daily high
18.3°C
Average daily low
13.4°C
Annual rainfall
817mm
Sunshine / day
10.0h
Mean relative humidity
72%
Average peak wind
16.8km/h
Seasonal range
17.2°C
Frost days (< 0 °C)
3 d/yr
Hot days (≥ 30 °C)
8 d/yr
Rainy days (≥ 1 mm)
95 d/yr
Annual snowfall
25.2 cm
Average feels-like high
18.0 °C
Average feels-like low
11.8 °C
Average peak gust
33.1 km/h
Tropical nights (≥ 20 °C)
77 d/yr
Solar radiation
16.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.3 °C
since 1940
+0.2 °C per decade · r² = 0.41 · 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
38.1 °C
26 July 2023
Coldest day
-7.7 °C
2 January 1942
Wettest day
260 mm
17 July 2017
Windiest day
58.3 km/h
7 February 2012
Strongest gust
124.6 km/h
7 February 2012
Hottest feels-like
40.6 °C
7 July 1988
Coldest feels-like
-13.7 °C
14 January 1968
Snowiest day
30.8 cm
13 January 1953
Sunniest day
14.8 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 | 12.1 °C | +2.4 °C | 91 mm | -18 mm |
| Feb | 9.4 °C | -1.4 °C | 97 mm | +12 mm |
| Mar | 15.3 °C | +2.5 °C | 65 mm | -19 mm |
| Apr | 16.3 °C | +0.1 °C | 80 mm | +30 mm |
| May | 21.1 °C | +0.5 °C | 42 mm | +1 mm |
| Jun | 27.1 °C | +2.1 °C | 9 mm | -20 mm |
| Jul | 29.9 °C | +2.6 °C | 18 mm | -3 mm |
| Aug | 27.9 °C | +0.5 °C | 10 mm | -12 mm |
| Sep | 24.8 °C | +0.9 °C | 21 mm | -43 mm |
| Oct | 19.2 °C | -0.2 °C | 97 mm | -1 mm |
| Nov | 17.3 °C | +2.1 °C | 76 mm | -18 mm |
| Dec | 12.9 °C | +1.6 °C | 193 mm | +73 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 Nea Ionia?
Nea Ionia has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 15.8 °C and it receives 817 mm of precipitation per year.
What is the hottest day ever recorded in Nea Ionia?
The hottest day measured in Nea Ionia between 1940 and 2025 was 26 July 2023, reaching 38.1 °C.
What is the coldest day in Nea Ionia?
The coldest day measured in Nea Ionia between 1940 and 2025 was 2 January 1942, at -7.7 °C.
Does it snow in Nea Ionia?
Yes. Nea Ionia gets on average 25.2 cm of snow per year and has around 3 frost days.
Has the climate of Nea Ionia warmed?
Yes: Nea Ionia warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Nea Ionia?
The wettest day measured in Nea Ionia between 1940 and 2025 was 17 July 2017, with 260 mm of rain in 24 hours.
What was the windiest day in Nea Ionia?
The windiest day measured in Nea Ionia between 1940 and 2025 was 7 February 2012, with winds reaching 58.3 km/h.
What is the warmest month in Nea Ionia?
The warmest month in Nea Ionia is July (24.7 °C on average); the coldest is January (7.5 °C).
How much does it rain in Nea Ionia?
Nea Ionia receives on average 817 mm of precipitation per year, spread over about 95 rainy days.
Is it sunny in Nea Ionia?
Nea Ionia 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 Nea Ionia?
The heaviest 24-hour snowfall measured in Nea Ionia between 1940 and 2025 was 13 January 1953, with 30.8 cm.
Are there tropical nights in Nea Ionia?
Yes: Nea Ionia has on average 77 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Nea Ionia?
In Nea Ionia, between 1940 and 2025, the highest apparent temperature reached 40.6 °C on 7 July 1988, and the lowest was -13.7 °C on 14 January 1968.
Compare Nea Ionia with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Nea Ionia