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Bologna weather by month
Historical averages 2016–2025 · not a forecast
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When is the best time to visit Bologna?
For a warm holiday, the best week has been 3–9 September (Weather Index 95). Several start dates remain plausible, and the best timing varies between years. July and August are warmest (32°C), January is driest and July has the most sun.
- Warmest
- July and August 32°C
- Coolest
- January 9°C
- Driest
- January 20% rain-day chance
- Wettest
- May 40% rain-day chance
- Sunniest
- July 14 hours a day
A rain day has 1 mm or more, snow included, so a short shower counts. Monthly averages below give the amounts.
Monthly averages in Bologna
Bologna historical monthly estimates, 2016–2025. Temperatures and sunshine are daily averages.
| Month | High (°C) | Low (°C) | Rain-day chance (%) | Expected rain days | Precipitation (mm/month) | Sunshine (hours/day) |
|---|---|---|---|---|---|---|
| January | 8.8 | 1.7 | 20.0 | 6.2 | 41.7 | 6.5 |
| February | 12.1 | 3.8 | 29.3 | 8.2 | 72.1 | 7.1 |
| March | 15.5 | 5.9 | 28.1 | 8.7 | 58.3 | 9.2 |
| April | 19.5 | 9.2 | 28.3 | 8.5 | 56.9 | 10.7 |
| May | 23.1 | 13.7 | 40.3 | 12.5 | 120.7 | 11.2 |
| June | 29.8 | 18.9 | 24.7 | 7.4 | 54.6 | 13.5 |
| July | 32.3 | 21.0 | 22.3 | 6.9 | 48.0 | 13.6 |
| August | 31.9 | 20.7 | 26.8 | 8.3 | 61.3 | 12.2 |
| September | 26.4 | 16.5 | 30.0 | 9.0 | 85.6 | 10.3 |
| October | 20.8 | 12.0 | 29.4 | 9.1 | 73.3 | 7.9 |
| November | 13.8 | 6.9 | 33.3 | 10.0 | 92.2 | 6.2 |
| December | 9.6 | 3.1 | 28.4 | 8.8 | 68.3 | 5.4 |
Each month averages its own days. Precipitation includes snow. About the data
Sources
Open-Meteo · 1 Jan 2016 – 31 Dec 2025
- Open-Meteo Historical Weather API
- Local days, 2016–2025, every year weighted equally. Each weekly chart averages its own seven days, without smoothing.
- Shading shows the 10th–90th percentile of past days, not forecast confidence.
- A rain day has at least 1 mm, snow included. The last weekly period has eight days.
- Wind is the average daytime (10:00–18:00) maximum, not gusts. Daylight is calculated from latitude. Missing readings stay blank.
- Mugginess (dew point) comes from the original daily summaries, on UTC days.
- The live two-week forecast comes from the Open-Meteo Weather Forecast API. The Weather Index does not use it.