Milan or New York: which climate?
Milan (Italy) has a humid subtropical climate, whereas New York (United States) has a hot-summer humid continental climate, according to the Köppen-Geiger classification.
The values compared here are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme. The same method and the same period apply to Milan and to New York.
Milan is warmer than New York by 1.1 °C in annual average: 13.2 °C against 12.1 °C.
Milan and New York receive comparable annual rainfall, on the order of 1,146 mm.
Milan gets 9.3 hours of sunshine per day on average, against 8.8 hours in New York.
Milan has warmed by +3.2 °C between 1940 and 2025, against +1.7 °C in New York. Milan is therefore warming faster than New York. Both trends are statistically significant.
Milan averages 28 hot days (≥ 30 °C) and 46 frost days per year; New York averages 20 and 75.
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
| Indicator | Milan | New York | Difference |
|---|---|---|---|
| Mean daily temperature | 13.2 °C | 12.1 °C | -1.1 °C |
| Average daily high | 17.6 °C | 15.7 °C | -1.9 °C |
| Average daily low | 9.3 °C | 8.6 °C | -0.7 °C |
| Annual rainfall | 1,146 mm | 1,098 mm | negligible |
| Sunshine / day | 9.3 h | 8.8 h | -0.5 h |
| Hot days (≥ 30 °C) | 28 d/yr | 20 d/yr | -8 d/yr |
| Frost days (< 0 °C) | 46 d/yr | 75 d/yr | +29 d/yr |
| Rainy days (≥ 1 mm) | 115 d/yr | 118 d/yr | negligible |
| Mean relative humidity | 73 % | 71 % | negligible |
| Average peak wind | 9.9 km/h | 17.4 km/h | +7.5 km/h |
A difference is only reported when it exceeds the resolution of the data. ERA5 is a reanalysis on a grid of about 31 km: two nearby cities often fall in the same cell, and below half a degree you are reading the grid, not the climate.