Annual mean 8°C · wettest around December · prevailing wind NE
Warmest
20.8 °C
Coldest
-0.4 °C
Wettest
42%
Windiest
3.4 m/s
Prevailing
NE
2.7 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 Altdorf over the whole year is 8°C. July is the hottest month, with highs of about 20°C; January is the coldest, with lows of about -1°C. Altdorf has no sharply defined rainy season: the chance of rain on a given day runs from 25% in September, the driest month, to 36% in December, the wettest. Winds in Altdorf are highest in April, averaging 2.7 m/s (10 km/h), and lightest in September, at 2.0 m/s (7 km/h). The prevailing wind is from the NE. The clearest skies in Altdorf come in August, when the sky is typically 58% covered; November is the cloudiest month, at 71%.
Month by month Altdorf 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
1°C
-1°C
-3°C
32%
70%
2.5 m/s
0
0
6
February
4°C
0°C
-1°C
28%
67%
2.5 m/s
0
0
16
March
6°C
1°C
2°C
32%
60%
2.6 m/s
1
0
28
April
10°C
4°C
6°C
29%
63%
2.7 m/s
15
0
48
May
14°C
8°C
11°C
34%
69%
2.5 m/s
33
2
62
June
19°C
13°C
17°C
31%
60%
2.3 m/s
59
17
58
July
20°C
14°C
19°C
29%
60%
2.2 m/s
63
23
56
August
20°C
14°C
19°C
26%
58%
2.1 m/s
60
26
53
September
16°C
10°C
14°C
25%
60%
2.0 m/s
51
7
67
October
12°C
7°C
9°C
25%
62%
2.2 m/s
24
0
63
November
6°C
3°C
2°C
33%
71%
2.2 m/s
1
0
26
December
2°C
-0°C
-2°C
36%
68%
2.4 m/s
0
0
7
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 Altdorf weather by season
Year round, Altdorf has days of about 1°C at their warmest in January, its coolest month, and 20°C in July, its warmest; the coolest hours of the day run from -1°C to 14°C through the year, and the average temperature over the year is 8°C around the clock. Rain is most likely around December 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.
Altdorf weather in winterDecember to February
High 2°CLow -1°CRain 32%
Winter in Altdorf has typical daily highs of about 2°C and lows of about -1°C, with a 32% chance of rain on a given day.
Altdorf weather in springMarch to May
High 10°CLow 4°CRain 32%
Spring in Altdorf has typical daily highs of about 10°C and lows of about 4°C, with a 32% chance of rain on a given day.
Altdorf weather in summerJune to August
High 20°CLow 14°CRain 29%
Summer in Altdorf has typical daily highs of about 20°C and lows of about 14°C, with a 29% chance of rain on a given day.
Altdorf weather in autumnSeptember to November
High 11°CLow 7°CRain 28%
Autumn in Altdorf has typical daily highs of about 11°C and lows of about 7°C, with a 28% chance of rain on a given day.
When is the rainy season in Altdorf?
Altdorf has no sharply defined rainy season: the chance of rain on a given day runs from 25% in September, the driest month, to 36% in December, the wettest.
What time of year is Altdorf windiest?
Winds in Altdorf are highest in April, averaging 2.7 m/s (10 km/h), and lightest in September, at 2.0 m/s (7 km/h). The prevailing wind is from the NE.
What is the average temperature in Altdorf year round?
The average temperature in Altdorf over the whole year is 8°C. July is the hottest month, with highs of about 20°C; January is the coldest, with lows of about -1°C.