Rome climate — normals and trends
Rome (United States) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.8 °C and it receives 1,380 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 (20.7 °C on average) and the coldest is January (-5.9 °C). Rainfall peaks in June.
Rome averages 135 frost days, 7 hot days (≥ 30 °C) and 171 rainy days per year.
Rome has warmed by +1.7 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The number of frost days there went from about 145 to 125 per year over the period.
The hottest day of the period reached 35.0 °C (on 21 June 1953) and the coldest -33.4 °C (on 15 January 1957).
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
RomeNew York
- coords
- 43.21°, -75.46°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.8°C
Average daily high
12.4°C
Average daily low
3.2°C
Annual rainfall
1,380mm
Sunshine / day
8.1h
Mean relative humidity
75%
Average peak wind
15.8km/h
Seasonal range
26.6°C
Frost days (< 0 °C)
135 d/yr
Hot days (≥ 30 °C)
7 d/yr
Rainy days (≥ 1 mm)
171 d/yr
Annual snowfall
180.9 cm
Average feels-like high
10.5 °C
Average feels-like low
0.4 °C
Average peak gust
38.3 km/h
Tropical nights (≥ 20 °C)
7 d/yr
Solar radiation
13.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.36 · 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
35.0 °C
21 June 1953
Coldest day
-33.4 °C
15 January 1957
Wettest day
101 mm
27 September 1985
Windiest day
51.5 km/h
15 October 1954
Strongest gust
141.8 km/h
25 November 1950
Hottest feels-like
39.9 °C
5 August 1955
Coldest feels-like
-38.5 °C
15 January 1957
Snowiest day
33.7 cm
10 March 1964
Sunniest day
14.8 h
23 June 2021
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 | -3.2 °C | -1.1 °C | 102 mm | -3 mm |
| Feb | -1.3 °C | -0.5 °C | 126 mm | +33 mm |
| Mar | 8.4 °C | +4.0 °C | 102 mm | -6 mm |
| Apr | 12.8 °C | +0.8 °C | 157 mm | +36 mm |
| May | 17.8 °C | -1.0 °C | 191 mm | +72 mm |
| Jun | 24.5 °C | +1.2 °C | 155 mm | +29 mm |
| Jul | 27.3 °C | +1.7 °C | 96 mm | -22 mm |
| Aug | 25.5 °C | +1.0 °C | 64 mm | -52 mm |
| Sep | 22.8 °C | +2.2 °C | 53 mm | -62 mm |
| Oct | 16.0 °C | +1.6 °C | 113 mm | -3 mm |
| Nov | 6.0 °C | -1.2 °C | 145 mm | +19 mm |
| Dec | -0.6 °C | -1.2 °C | 139 mm | +20 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 Rome?
Rome has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.8 °C and it receives 1,380 mm of precipitation per year.
What is the hottest day ever recorded in Rome?
The hottest day measured in Rome between 1940 and 2025 was 21 June 1953, reaching 35.0 °C.
What is the coldest day in Rome?
The coldest day measured in Rome between 1940 and 2025 was 15 January 1957, at -33.4 °C.
Does it snow in Rome?
Yes. Rome gets on average 180.9 cm of snow per year and has around 135 frost days.
Has the climate of Rome warmed?
Yes: Rome warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Rome?
The wettest day measured in Rome between 1940 and 2025 was 27 September 1985, with 101 mm of rain in 24 hours.
What was the windiest day in Rome?
The windiest day measured in Rome between 1940 and 2025 was 15 October 1954, with winds reaching 51.5 km/h.
What is the warmest month in Rome?
The warmest month in Rome is July (20.7 °C on average); the coldest is January (-5.9 °C).
How much does it rain in Rome?
Rome receives on average 1,380 mm of precipitation per year, spread over about 171 rainy days.
Is it sunny in Rome?
Rome gets on average 8.1 hours of sunshine per day, roughly 2,957 hours per year over 1940-2025.
What is the biggest single-day snowfall in Rome?
The heaviest 24-hour snowfall measured in Rome between 1940 and 2025 was 10 March 1964, with 33.7 cm.
Are there tropical nights in Rome?
Yes: Rome has on average 7 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Rome?
In Rome, between 1940 and 2025, the highest apparent temperature reached 39.9 °C on 5 August 1955, and the lowest was -38.5 °C on 15 January 1957.
Compare Rome with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Rome