Climate averages 1991–2020
Asti weather
in September.
A warm, 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 Asti: daytime highs average 23.6°C and nights cool to about 14.8°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 111 mm of rain on roughly 10 days, which makes September a 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 Alessandria (32 km away). In September its highs average 23.8°C, about as warm as Asti, with 86 mm of rain.
Among the 79 cities listed in Italy, Asti ranks joint 56th of 79 for the warmest September highs and 62nd of 79 for the driest September (rainfall, lowest first). The mean September high of those 79 cities is 24.3°C; Asti is 0.7°C cooler than that mean.
From September to October, average highs fall by 6.0°C to 17.6°C, and monthly rainfall falls from 111 mm to 107 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
Asti 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-0.6°C | -0.6°C | 57 | 6.5 | 9.29 h |
| February | 9.3°C0.3°C | 0.3°C | 60 | 6.2 | 10.410 h |
| March | 14.1°C3.8°C | 3.8°C | 67 | 7.6 | 11.912 h |
| April | 17.6°C7.7°C | 7.7°C | 94 | 11.2 | 13.513 h |
| May | 22.0°C12.1°C | 12.1°C | 114 | 13.4 | 14.815 h |
| June | 26.4°C16.1°C | 16.1°C | 105 | 12.0 | 15.516 h |
| July | 29.3°C18.9°C | 18.9°C | 83 | 11.1 | 15.215 h |
| August | 28.8°C18.9°C | 18.9°C | 108 | 12.0 | 14.114 h |
| September, selected | 23.6°C14.8°C | 14.8°C | 111 | 10.0 | 12.613 h |
| October | 17.6°C10.2°C | 10.2°C | 107 | 9.3 | 11.011 h |
| November | 11.5°C4.8°C | 4.8°C | 124 | 9.2 | 9.610 h |
| December | 7.0°C0.2°C | 0.2°C | 65 | 7.0 | 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
- Alessandria in SeptemberItaly · 32 kmHigh 23.8°C · Low 14.2°C · 86 mm rain
- Turin in SeptemberItaly · 45 kmHigh 21.7°C · Low 13.0°C · 88 mm rain
- Novara in SeptemberItaly · 69 kmHigh 23.1°C · Low 14.0°C · 159 mm rain
- Genoa in SeptemberItaly · 80 kmHigh 23.5°C · Low 16.5°C · 124 mm rain
- Busto Arsizio in SeptemberItaly · 94 kmHigh 22.2°C · Low 13.8°C · 134 mm rain
- Milan in SeptemberItaly · 99 kmHigh 22.8°C · Low 14.0°C · 119 mm rain
- Cinisello Balsamo in SeptemberItaly · 107 kmHigh 22.4°C · Low 13.9°C · 119 mm rain
- Monza in SeptemberItaly · 112 kmHigh 22.2°C · Low 13.6°C · 119 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 Asti) is explained once on the Asti year overview and on the Sources, method and limits page.