Annual mean 7°C · wettest around May · prevailing wind SE
Warmest
20.1 °C
Coldest
-1.5 °C
Wettest
35%
Windiest
3.7 m/s
Prevailing
SE
3.0 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Aosta over the whole year is 7°C. July is the hottest month, with highs of about 20°C; January is the coldest, with lows of about -4°C. Aosta has no sharply defined rainy season: the chance of rain on a given day runs from 21% in September, the driest month, to 28% in May, the wettest. Winds in Aosta are highest in April, averaging 3.0 m/s (11 km/h), and lightest in September, at 2.2 m/s (8 km/h). The prevailing wind is from the SE. The clearest skies in Aosta come in August, when the sky is typically 43% covered; May is the cloudiest month, at 61%.
Month by month Aosta climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
-0°C
-4°C
-5°C
27%
49%
2.8 m/s
0
0
7
February
3°C
-2°C
-2°C
23%
54%
2.8 m/s
1
0
20
March
5°C
-1°C
0°C
25%
51%
2.9 m/s
5
0
31
April
9°C
2°C
4°C
25%
56%
3.0 m/s
18
0
44
May
12°C
6°C
8°C
28%
61%
2.7 m/s
33
4
48
June
18°C
11°C
15°C
25%
53%
2.7 m/s
45
21
45
July
20°C
13°C
17°C
23%
47%
2.7 m/s
41
32
41
August
20°C
13°C
17°C
22%
43%
2.4 m/s
41
31
41
September
15°C
9°C
13°C
21%
50%
2.2 m/s
45
13
50
October
11°C
5°C
8°C
24%
50%
2.5 m/s
29
1
54
November
4°C
0°C
0°C
26%
54%
2.5 m/s
2
0
28
December
1°C
-2°C
-4°C
26%
48%
2.6 m/s
0
0
9
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Aosta weather by season
Year round, Aosta has days of about -0°C at their warmest in January, its coolest month, and 20°C in July, its warmest; the coolest hours of the day run from -4°C to 13°C through the year, and the average temperature over the year is 7°C around the clock. Rain is most likely around May and least likely around September. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Aosta weather in winterDecember to February
High 1°CLow -3°CRain 25%
Winter in Aosta has typical daily highs of about 1°C and lows of about -3°C, with a 25% chance of rain on a given day.
Aosta weather in springMarch to May
High 8°CLow 3°CRain 26%
Spring in Aosta has typical daily highs of about 8°C and lows of about 3°C, with a 26% chance of rain on a given day.
Aosta weather in summerJune to August
High 19°CLow 12°CRain 23%
Summer in Aosta has typical daily highs of about 19°C and lows of about 12°C, with a 23% chance of rain on a given day.
Aosta weather in autumnSeptember to November
High 10°CLow 5°CRain 24%
Autumn in Aosta has typical daily highs of about 10°C and lows of about 5°C, with a 24% chance of rain on a given day.
When is the rainy season in Aosta?
Aosta has no sharply defined rainy season: the chance of rain on a given day runs from 21% in September, the driest month, to 28% in May, the wettest.
What time of year is Aosta windiest?
Winds in Aosta are highest in April, averaging 3.0 m/s (11 km/h), and lightest in September, at 2.2 m/s (8 km/h). The prevailing wind is from the SE.
What is the average temperature in Aosta year round?
The average temperature in Aosta over the whole year is 7°C. July is the hottest month, with highs of about 20°C; January is the coldest, with lows of about -4°C.