🇮🇹 Weather in Rome in September
This is what the weather in Rome (Lazio, Italy) was like in September in 2017–2026.
Key facts at a glance
Avg. daytime high
28.5 °C
25.2 °C – 31.3 °C
Avg. night-time low
17.9 °C
15.4 °C – 19.6 °C
Avg. rain days in period
7.8
26 % of days · ≥ 1.0 mm
Avg. precipitation in period
65.3 mm
13.4 mm – 112 mm
Avg. sunshine per day
n/a
Sunshine duration is not available from this data source.
Avg. sea temperature
–
Sea temperature unavailable for today (daily limit).
Extremes: Highest temperature 36.7 °C (3 Sep 2026) · Lowest temperature 9.5 °C (29 Sep 2020) · Avg. daily peak wind 19 km/h
Weather mix of all days
- 125Sunny
- 60Partly cloudy
- 11Cloudy
- 38Light rain
- 40Rain
Summary
- On average 28.5 °C during the day and 17.9 °C at night.
- On average 7.8 rain days (Rain day = at least 1.0 mm of precipitation) with 65.3 mm of precipitation in total.
- Prevailing: Sunny.
- Warmest year: 2026 (avg. 31.3 °C), coolest: 2017 (avg. 25.2 °C).
- Wettest year: 2017 (112 mm), driest: 2021 (13.4 mm).
- Extremes: 36.7 °C on 3 Sep 2026 and 9.5 °C on 29 Sep 2020.
Overall values from all 10 years. How is this calculated?
Charts
Temperatures per year
Average over your travel period
Precipitation & rain days
Year by year
2026
Avg. max31.3°Avg. min19.6°- Rain days
- 4 Rain days
- Precipitation
- 41.8 mm
- Avg. sunshine per day
- n/a
- Sea temperature
- –
Max 36.7 °C · Min 14.0 °C
2025
Avg. max28.6°Avg. min18.0°- Rain days
- 7 Rain days
- Precipitation
- 66.0 mm
- Avg. cloud cover
- 32 % cloudy
- Sea temperature
- –
Max 32.3 °C · Min 14.2 °C
2024
Avg. max27.3°Avg. min17.4°- Rain days
- 13 Rain days
- Precipitation
- 84.5 mm
- Avg. cloud cover
- 41 % cloudy
- Sea temperature
- –
Max 33.4 °C · Min 10.3 °C
2023
Avg. max30.3°Avg. min18.7°- Rain days
- 5 Rain days
- Precipitation
- 24.8 mm
- Avg. cloud cover
- 29 % cloudy
- Sea temperature
- –
Max 33.6 °C · Min 13.5 °C
2022
Avg. max27.5°Avg. min17.4°- Rain days
- 13 Rain days
- Precipitation
- 102 mm
- Avg. cloud cover
- 36 % cloudy
- Sea temperature
- –
Max 33.5 °C · Min 10.8 °C
2021
Avg. max29.7°Avg. min18.6°- Rain days
- 4 Rain days
- Precipitation
- 13.4 mm
- Avg. cloud cover
- 33 % cloudy
- Sea temperature
- –
Max 32.3 °C · Min 15.1 °C
2020
Avg. max28.4°Avg. min18.2°- Rain days
- 11 Rain days
- Precipitation
- 110 mm
- Avg. cloud cover
- 31 % cloudy
- Sea temperature
- –
Max 34.7 °C · Min 9.5 °C
2019
Avg. max28.4°Avg. min17.8°- Rain days
- 8 Rain days
- Precipitation
- 68.4 mm
- Avg. cloud cover
- 28 % cloudy
- Sea temperature
- –
Max 32.6 °C · Min 14.3 °C
2018
Avg. max28.6°Avg. min17.8°- Rain days
- 7 Rain days
- Precipitation
- 30.2 mm
- Avg. cloud cover
- 35 % cloudy
- Sea temperature
- –
Max 33.4 °C · Min 9.7 °C
2017
Avg. max25.2°Avg. min15.4°- Rain days
- 6 Rain days
- Precipitation
- 112 mm
- Avg. cloud cover
- 38 % cloudy
- Sea temperature
- –
Max 29.4 °C · Min 10.2 °C
Frequently asked questions
- How warm is it in Rome in September?
- Daytime highs averaged 28.5 °C, night-time lows 17.9 °C. The highest value of the past 10 years was 36.7 °C (3 Sep 2026), the lowest 9.5 °C (29 Sep 2020).
- How often does it rain in Rome in September?
- On average there were 7.8 rain days (at least 1 mm) with 65.3 mm of precipitation in total.
Check your exact travel dates
Choose your travel period – we show the weather for exactly those days.
Other destinations in September
Data sources
- Weather data
- Data obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program
Reanalysis (weather model constrained by observations) on a coarse grid of about 50 km. Values represent a large area and can differ from local conditions, especially on islands, coasts and in mountains. No sunshine duration.
Reanalysis (weather model constrained by observations)
Reanalysis values represent a grid cell (approx. 25–50 km) and may differ from local measurements on coasts, islands and in mountains. - Sea temperature
- MUR SST data were provided by JPL under support by NASA MEaSUREs program; accessed via NOAA CoastWatch ERDDAP
Daily multi-scale ultra-high resolution (≈ 1 km) analysis of satellite measurements (infrared, microwave) and in-situ data. Represents the foundation temperature below the daily warm surface layer. (Satellite and in-situ analysis) - Place search
- Natural Earth (public domain) · GeoNames (CC BY 4.0) / OpenStreetMap (ODbL)