Asti sits in the Tanaro River valley in northwestern Italy, with a humid subtropical climate that brings hot, humid summers and cool, foggy winters. The city’s position between the Alps to the north and the Ligurian Apennines to the south creates a continental influence with distinct seasonal shifts. Average annual rainfall is about 835mm spread across roughly 80 rainy days, peaking in spring and autumn. Snow does fall most winters but rarely accumulates more than a few centimetres in the city centre. For more detail, see our best time to visit Asti.
Asti Weather in January
January is the coldest month in Asti, with average temperatures around 2°C (36°F). Daytime highs reach about 6°C (43°F) while overnight lows dip to -1°C (30°F). Expect roughly 45mm of rain across 6-7 wet days, with occasional light snow. Fog is frequent, especially in the morning, and can linger all day in the valley. Sunshine is limited to about 3 hours daily. Pack a heavy coat, scarf, and waterproof shoes; the cold is damp rather than dry. For more detail, see our things to do in Asti.
Asti Weather in February
February remains cold but sees a slight warming trend. Average temperatures climb to 4°C (39°F), with daytime highs of 9°C (48°F) and lows around 0°C (32°F). Rainfall increases to about 50mm. Fog continues to be a factor, though there are more clear days than in January. Snow is still possible in the first half of the month. The Carnevale celebrations in nearby towns add some colour to the grey winter landscape. For more detail, see our Asti events and festivals.
Asti Weather in March
March brings the first real signs of spring, with average temperatures reaching 9°C (48°F). Daytime highs climb to 14°C (57°F) and lows stay around 4°C (39°F). This is a wet month with about 65mm of rainfall across 7-8 days. Fog begins to recede and sunshine increases to 5 hours per day. The surrounding Monferrato hills start to green up, making it a decent month for early-season wine touring if you do not mind occasional rain. For more detail, see our Asti neighborhoods guide.
Asti Weather in April
April temperatures average 12°C (54°F), with highs around 17°C (63°F) and lows of 7°C (45°F). Rainfall increases significantly to about 85mm, making it one of the wetter months. Expect 8-9 rainy days, often as afternoon showers. Sunshine increases to 6 hours daily. The countryside is lush and vineyards are in full leaf. A light jacket and umbrella are essential; layering works well as temperatures swing 10°C between morning and afternoon. For more detail, see our where to stay in Asti.
Asti Weather in May
May is pleasantly warm with average temperatures of 17°C (63°F). Daytime highs reach 22°C (72°F) and lows settle at 11°C (52°F). This is typically the wettest month at about 95mm, with 9-10 rainy days, but rain tends to fall in short, heavy bursts rather than all-day drizzle. Sunshine climbs to 7 hours daily. The weather is ideal for outdoor dining and vineyard walks between showers. Humidity is moderate at around 70%. For more detail, see our Asti travel tips.
Asti Weather in June
June brings summer conditions with average temperatures of 21°C (70°F). Daytime highs climb to 26°C (79°F) and lows stay around 15°C (59°F). Rainfall drops to about 70mm across 7-8 days, often as afternoon thunderstorms. Humidity increases to around 75%, making it feel warmer than the thermometer suggests. Sunshine peaks at 9 hours daily. The long daylight hours are perfect for evening passeggiate through the medieval centre.
Asti Weather in July
July is the hottest month, averaging 24°C (75°F). Daytime highs hit 29°C (84°F) and occasionally exceed 32°C (90°F) during heatwaves. Overnight lows stay at a comfortable 18°C (64°F). This is one of the drier months at about 45mm of rain, typically from brief thunderstorms. Humidity is high at 75-80%, making the heat feel sticky. Air conditioning is not universal in older Italian buildings, so choose accommodation with it confirmed. Sunshine averages 10 hours daily.
Asti Weather in August
August temperatures average 23°C (73°F), slightly cooler than July. Daytime highs reach 28°C (82°F) and lows dip to 17°C (63°F). Rainfall increases to about 65mm with more frequent thunderstorms, especially in the second half of the month. Humidity remains high at 75%. Many local businesses close for Ferragosto (August 15) and the surrounding weeks. Tourist numbers are lower than July as Italians head to the coast.
Asti Weather in September
September is one of the best months to visit, with average temperatures of 19°C (66°F). Daytime highs reach 24°C (75°F) and lows settle at 14°C (57°F). Rainfall is around 75mm across 7 days, but the weather is generally sunny and pleasant. Humidity drops to about 70%. This is harvest season in the surrounding vineyards, and the month hosts Asti’s biggest events including the Palio and Festival delle Sagre. Sunshine averages 7 hours daily.
Asti Weather in October
October sees a sharp cooling with average temperatures of 13°C (55°F). Daytime highs reach 17°C (63°F) and lows drop to 9°C (48°F). This is the wettest month alongside May, with about 100mm of rain across 8-9 days. Fog returns to the valley, particularly in the mornings. The autumn colours in the Monferrato vineyards are spectacular. Truffle season begins, and the white truffle fair draws food lovers despite the iffy weather.
Asti Weather in November
November is grey and damp, with average temperatures of 7°C (45°F). Daytime highs struggle to 11°C (52°F) and lows drop to 4°C (39°F). Rainfall is around 85mm with 8-9 wet days. Fog is thick and persistent; the Tanaro valley is notorious for it. Sunshine drops to 3 hours daily. This is the low season for tourism, with many agriturismi and smaller restaurants closing for winter holidays. Hotel prices are at their lowest.
Asti Weather in December
December temperatures average 3°C (37°F) with daytime highs of 7°C (45°F) and lows around 0°C (32°F). Rainfall is about 55mm with a mix of rain and occasional snow. Fog dominates the mornings and often burns off only briefly at midday. Christmas markets appear in Piazza San Secondo and Piazza Roma, bringing some cheer to the short, dark days. Sunshine is limited to 2-3 hours daily. Pack warm layers and waterproof footwear.
Asti Weather by Month: Comparison Table
| Month | Avg High | Avg Low | Rainfall | Rain Days | Sun (hrs) |
|---|---|---|---|---|---|
| Jan | 6°C / 43°F | -1°C / 30°F | 45mm | 6 | 3 |
| Feb | 9°C / 48°F | 0°C / 32°F | 50mm | 6 | 4 |
| Mar | 14°C / 57°F | 4°C / 39°F | 65mm | 7 | 5 |
| Apr | 17°C / 63°F | 7°C / 45°F | 85mm | 8 | 6 |
| May | 22°C / 72°F | 11°C / 52°F | 95mm | 9 | 7 |
| Jun | 26°C / 79°F | 15°C / 59°F | 70mm | 7 | 9 |
| Jul | 29°C / 84°F | 18°C / 64°F | 45mm | 5 | 10 |
| Aug | 28°C / 82°F | 17°C / 63°F | 65mm | 6 | 9 |
| Sep | 24°C / 75°F | 14°C / 57°F | 75mm | 7 | 7 |
| Oct | 17°C / 63°F | 9°C / 48°F | 100mm | 8 | 5 |
| Nov | 11°C / 52°F | 4°C / 39°F | 85mm | 8 | 3 |
| Dec | 7°C / 45°F | 0°C / 32°F | 55mm | 6 | 2 |
