, characterized by cold winters, with temperatures often below freezing (0 °C or 32 °F), and mild or pleasantly warm summers.
Chamonix-Mont-Blanc is a well-known ski resort, located at the foot of Mont Blanc (the highest mountain in the Alps with its 4,810 meters or 15,781 feet), in a valley at 1,000 meters (3,300 feet) above sea level, on the north-western slope of the Alps, in Haute-Savoie.
is cold. Snowfalls are quite frequent. In periods of good weather, however, the sun can come out, while in the inland plains of France, in the Swiss plateau and in the Po valley, mists and cloud layers often form at low altitude.
Sometimes there can be cold spells, in which the temperature can drop down to -15 °C (5 °F) or even below. The coldest record is -25.4 °C (-13.7 °F) and was set in January 1966.
, temperatures are pleasant and suitable for outdoor activities, although sometimes there can be rains and thunderstorms, and it can get very cool at night due to altitude. The summer is the rainiest season due to afternoon thunderstorms.
Occasionally (but less than in the lowlands), there may be brief hot periods. On average, the temperature reaches or exceeds 30 °C (86 °F) for 8 days a year, but in recent years, hot spells are becoming more frequent due to global warming. The highest record is 37.2 °C (99 °F) and was set in July 1983.
to visit Chamonix runs from June to August, since it is the mildest and sunniest period of the year. Sometimes, nights can be cool or even cold even in these months, so it can be useful to bring a sweatshirt or sweater and a jacket for the evening.
. Here are the average temperatures.
January, the coldest month of the year, is generally a very cold month. The average temperature is of
-1.8 °C, with a minimum of
-6.7 °C and a maximum of
3 °C.
On the coldest nights of the month, the temperature usually drops to around
-15.5 °C. However, it dropped to
-19.9 °C in January 2005.
On the warmest days of the month, the temperature usually reaches around
10 °C. However, it reached
15.3 °C in January 1998.
Precipitation amounts to
95 mm, distributed over 10 days.
The day lasts on average 9 hours and 10 minutes.
There are on average 3.5 hours of sunshine per day. So, the sun shines 40% of the time.
The average humidity is 70%.
February is generally a very cold month. The average temperature is of
-0.2 °C, with a minimum of
-5.9 °C and a maximum of
5.5 °C.
On the coldest nights of the month, the temperature usually drops to around
-14.5 °C. However, it dropped to
-23.2 °C in February 2012.
On the warmest days of the month, the temperature usually reaches around
14 °C. However, it reached
19.6 °C in February 2011.
Precipitation amounts to
85 mm, distributed over 8 days.
The day lasts on average 10 hours and 25 minutes.
There are on average 4.5 hours of sunshine per day. So, the sun shines 42% of the time.
The average humidity is 72%. Hence, the air is normally humid.
March is generally a cold month. The average temperature is of
3.9 °C, with a minimum of
-2.5 °C and a maximum of
10.3 °C.
On the coldest nights of the month, the temperature usually drops to around
-9.5 °C. However, it dropped to
-19.1 °C in March 2005.
On the warmest days of the month, the temperature usually reaches around
19 °C. However, it reached
22.1 °C in March 2004.
Precipitation amounts to
85 mm, distributed over 10 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 44% of the time.
The average humidity is 73%. Hence, the air is normally humid.
April is generally a quite mild month. However, there are remarkable differences between night and day. The average temperature is of
7.4 °C, with a minimum of
0.9 °C and a maximum of
14 °C.
On the coldest nights of the month, the temperature usually drops to around
-5 °C. However, it dropped to
-8.8 °C in April 1993.
On the warmest days of the month, the temperature usually reaches around
22 °C. However, it reached
26.4 °C in April 2011.
Precipitation amounts to
90 mm, distributed over 10 days.
The day lasts on average 13 hours and 35 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 42% of the time.
The average humidity is 75%. Hence, the air is normally humid.
May is generally a mild month. However, there are remarkable differences between night and day. The average temperature is of
11.8 °C, with a minimum of
5.1 °C and a maximum of
18.4 °C.
On the coldest nights of the month, the temperature usually drops to around
-1 °C. However, it dropped to
-4 °C in May 1991.
On the warmest days of the month, the temperature usually reaches around
26.5 °C. However, it reached
31.7 °C in May 2009.
Precipitation amounts to
120 mm, distributed over 14 days.
The day lasts on average 14 hours and 55 minutes. So the days are long.
There are on average 6.5 hours of sunshine per day. So, the sun shines 44% of the time.
The average humidity is 77%. Hence, the air is normally humid.
June is generally a very mild month. However, there are remarkable differences between night and day. The average temperature is of
15.1 °C, with a minimum of
8.1 °C and a maximum of
22.1 °C.
On the coldest nights of the month, the temperature usually drops to around
2 °C. However, it dropped to
-2.3 °C in June 2006.
On the warmest days of the month, the temperature usually reaches around
30 °C. However, it reached
33.1 °C in June 2016.
Precipitation amounts to
130 mm, distributed over 13 days.
The day lasts on average 15 hours and 35 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 7.5 hours of sunshine per day. So, the sun shines 48% of the time.
The average humidity is 74%. Hence, the air is normally humid.
July, the warmest month of the year, is generally a very mild month. However, there are remarkable differences between night and day. The average temperature is of
16.8 °C, with a minimum of
9.4 °C and a maximum of
24.2 °C.
On the coldest nights of the month, the temperature usually drops to around
4 °C. However, it dropped to
1.1 °C in July 2000.
On the warmest days of the month, the temperature usually reaches around
31.5 °C. However, it reached
35.7 °C in July 2015.
Precipitation amounts to
120 mm, distributed over 12 days.
The day lasts on average 15 hours and 10 minutes. So the days are long.
There are on average 8 hours of sunshine per day. So, the sun shines 53% of the time.
The average humidity is 71%. Hence, the air is normally humid.
August is generally a very mild month. However, there are remarkable differences between night and day. The average temperature is of
16.4 °C, with a minimum of
9.1 °C and a maximum of
23.8 °C.
On the coldest nights of the month, the temperature usually drops to around
3.5 °C. However, it dropped to
-1.7 °C in August 1995.
On the warmest days of the month, the temperature usually reaches around
31 °C. However, it reached
34.4 °C in August 2012.
Precipitation amounts to
125 mm, distributed over 12 days.
The day lasts on average 14 hours and 0 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 52% of the time.
The average humidity is 73%. Hence, the air is normally humid.
September is generally a mild month. However, there are remarkable differences between night and day. The average temperature is of
12.8 °C, with a minimum of
6.2 °C and a maximum of
19.4 °C.
On the coldest nights of the month, the temperature usually drops to around
0.5 °C. However, it dropped to
-3.4 °C in September 1995.
On the warmest days of the month, the temperature usually reaches around
26 °C. However, it reached
30.7 °C in September 2009.
Precipitation amounts to
105 mm, distributed over 10 days.
The day lasts on average 12 hours and 30 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 49% of the time.
The average humidity is 74%. Hence, the air is normally humid.
October is generally a mild month. The average temperature is of
9 °C, with a minimum of
2.8 °C and a maximum of
15.1 °C.
On the coldest nights of the month, the temperature usually drops to around
-3.5 °C. However, it dropped to
-8.5 °C in October 1997.
On the warmest days of the month, the temperature usually reaches around
23 °C. However, it reached
26 °C in October 2012.
Precipitation amounts to
115 mm, distributed over 10 days.
The day lasts on average 10 hours and 55 minutes.
There are on average 4.5 hours of sunshine per day. So, the sun shines 41% of the time.
The average humidity is 72%. Hence, the air is normally humid.
November is generally a cold month. The average temperature is of
3.4 °C, with a minimum of
-1.5 °C and a maximum of
8.2 °C.
On the coldest nights of the month, the temperature usually drops to around
-9 °C. However, it dropped to
-15.7 °C in November 1998.
On the warmest days of the month, the temperature usually reaches around
17.5 °C. However, it reached
22.9 °C in November 2020.
Precipitation amounts to
100 mm, distributed over 10 days.
The day lasts on average 9 hours and 30 minutes.
There are on average 3 hours of sunshine per day. So, the sun shines 33% of the time.
The average humidity is 71%. Hence, the air is normally humid.
December is generally a very cold month. The average temperature is of
-1.1 °C, with a minimum of
-5.2 °C and a maximum of
3 °C.
On the coldest nights of the month, the temperature usually drops to around
-14 °C. However, it dropped to
-20.9 °C in December 2005.
On the warmest days of the month, the temperature usually reaches around
10 °C. However, it reached
15.7 °C in December 2019.
Precipitation amounts to
110 mm, distributed over 11 days.
The day lasts on average 8 hours and 50 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There are on average 3 hours of sunshine per day. So, the sun shines 33% of the time.
The average humidity is 68%.