Climate Change Chart of Courchevel, France

Overview of climate changes

Changes in snowfall

Mean daily snowfall averaged across calendar months shows a difference of +4.71 mm/day, an unweighted comparison of monthly means rather than a day-weighted annual average or monthly totals. The largest monthly increase was in December, with a difference of +15.01 mm/day. By contrast, October recorded the largest monthly decrease, a difference of -2.85 mm/day. These changes describe daily mean snowfall by month; they do not indicate that snowfall moved uniformly in one direction throughout the year.

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.73 °C; this is an unweighted comparison of monthly means, not a day-weighted annual average or a measure of daytime highs. The largest monthly increase was in December, with a difference of +5.04 °C. In contrast, September had the largest monthly decrease, a difference of -0.09 °C. These extrema describe the changes in those particular monthly means, rather than indicating that every month changed in the same direction.

Changes in rainfall

Mean daily rainfall averaged across calendar months shows a difference of +0.65 mm/day; this unweighted mean describes the aggregate across monthly means, not a day-weighted annual average or monthly rainfall totals. The largest monthly increase occurred in June, with a difference of +1.33 mm/day. That month’s result is a daily mean comparison, so it should not be read as a change in the month’s total rainfall, and it does not establish that rainfall increased in every month.

Changes in sunshine duration

Mean daily sunshine duration, averaged across calendar months, shows a difference of -0.65 hours/day. This is an unweighted comparison of monthly means, not a day-weighted annual average. The largest monthly decrease was in March, with a difference of -1.08 hours/day; this identifies the strongest monthly decrease, without implying that every month had less sunshine.