Climate Change Chart of Nice, France

Overview of climate changes

Temperature changes

Monthly mean temperature was higher by a mean difference of +1.13 °C averaged across calendar months in the more recent reference period; this unweighted comparison of monthly means is not a day-weighted annual average, and it does not describe daytime maximum temperatures. The largest monthly increase was in January, with a difference of +2.56 °C. That identifies the strongest monthly rise, while the overall mean summarizes differences across calendar months rather than implying the same change in each month.

Changes in rainfall

Mean daily rainfall increased by a mean difference of +0.31 mm/day averaged across calendar months compared with the earlier reference period. This is an unweighted average of monthly differences in daily amounts, not a change in monthly rainfall totals, and it need not apply to every month. The largest monthly increase was in November, at a difference of +2.05 mm/day, whereas May had the largest decrease, with a difference of -0.21 mm/day. These contrasting monthly changes show why the overall mean should be read as an aggregate, not a uniform shift throughout the year.

Changes in sunshine duration

Mean daily sunshine duration had a mean difference of -0.15 hours/day averaged across calendar months, indicating lower sunshine in the more recent period in this unweighted comparison of monthly means. It is not a day-weighted annual average or a description of every month. The largest monthly decrease occurred in April, with a difference of -0.38 hours/day; by contrast, January recorded the largest increase, at a difference of +0.10 hours/day. The monthly extremes therefore move in different directions even as the aggregate mean is lower.

Changes in snowfall

Mean daily snowfall decreased by a mean difference of -0.55 mm/day averaged across calendar months. This unweighted summary of monthly means is not a day-weighted annual average, and it does not mean that snowfall declined in every month. The largest monthly decrease was in January, with a difference of -3.28 mm/day, while March had the largest increase, at a difference of +0.13 mm/day. These are differences in mean daily amounts, not monthly snowfall totals; the monthly contrasts help put the overall average in context.