Climate averages 1991–2020
Alessandria weather
in September.
A warm, moderately wet month: the 4th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Alessandria: daytime highs average 23.8°C and nights cool to about 14.2°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 86 mm of rain on roughly 9 days, which makes September a moderately wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 34 min on an average September day.
The nearest other city in this atlas is Asti (32 km away). In September its highs average 23.6°C, about as warm as Alessandria, with 111 mm of rain.
Among the 79 cities listed in Italy, Alessandria ranks joint 51st of 79 for the warmest September highs and joint 41st of 79 for the driest September (rainfall, lowest first). The mean September high of those 79 cities is 24.3°C; Alessandria is 0.5°C cooler than that mean.
From September to October, average highs fall by 6.1°C to 17.7°C, and monthly rainfall rises from 86 mm to 99 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Alessandria climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 6.8°C-0.9°C | -0.9°C | 57 | 6.7 | 9.29 h |
| February | 9.3°C-0.2°C | -0.2°C | 56 | 6.3 | 10.410 h |
| March | 13.8°C3.2°C | 3.2°C | 61 | 7.1 | 11.912 h |
| April | 17.2°C7.0°C | 7.0°C | 79 | 9.9 | 13.513 h |
| May | 21.6°C11.5°C | 11.5°C | 83 | 11.0 | 14.815 h |
| June | 26.4°C15.7°C | 15.7°C | 68 | 9.7 | 15.516 h |
| July | 29.6°C18.5°C | 18.5°C | 52 | 8.6 | 15.215 h |
| August | 29.2°C18.5°C | 18.5°C | 66 | 9.7 | 14.114 h |
| September, selected | 23.8°C14.2°C | 14.2°C | 86 | 8.7 | 12.613 h |
| October | 17.7°C9.8°C | 9.8°C | 99 | 9.4 | 11.011 h |
| November | 11.5°C4.5°C | 4.5°C | 118 | 9.8 | 9.610 h |
| December | 7.0°C-0.1°C | -0.1°C | 66 | 7.4 | 8.99 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Asti in SeptemberItaly · 32 kmHigh 23.6°C · Low 14.8°C · 111 mm rain
- Novara in SeptemberItaly · 60 kmHigh 23.1°C · Low 14.0°C · 159 mm rain
- Genoa in SeptemberItaly · 62 kmHigh 23.5°C · Low 16.5°C · 124 mm rain
- Turin in SeptemberItaly · 75 kmHigh 21.7°C · Low 13.0°C · 88 mm rain
- Milan in SeptemberItaly · 77 kmHigh 22.8°C · Low 14.0°C · 119 mm rain
- Busto Arsizio in SeptemberItaly · 80 kmHigh 22.2°C · Low 13.8°C · 134 mm rain
- Cinisello Balsamo in SeptemberItaly · 86 kmHigh 22.4°C · Low 13.9°C · 119 mm rain
- Piacenza in SeptemberItaly · 87 kmHigh 24.2°C · Low 15.2°C · 93 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Alessandria) is explained once on the Alessandria year overview and on the Sources, method and limits page.