Climate Change Chart of Linz, Austria

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +1.92 °C compared with the earlier reference period. This is a comparison of monthly averages, not daytime maximum temperatures, and it does not describe a continuous change between the periods. The largest monthly increase was in January, at +4.69 °C; by contrast, May had the largest decrease, a difference of -0.09 °C. These month-specific contrasts show that the overall average difference did not apply uniformly across the calendar.

Changes in snowfall

Mean daily snowfall averaged across calendar months had a difference of -0.74 mm/day in the more recent period. The measure is a daily mean, not a monthly total, and the average difference does not imply the same change in every month. The largest monthly increase was in January, at +1.07 mm/day, while the largest decrease was in February, a difference of -3.13 mm/day. These monthly contrasts provide important context for interpreting the overall mean difference.

Changes in rainfall

Mean daily rainfall, averaged across calendar months, had a difference of +0.38 mm/day in the more recent period. This is an unweighted comparison of monthly means, not a comparison of monthly rainfall totals or a day-weighted annual average. The strongest monthly increase occurred in May, with a difference of +1.07 mm/day, while July recorded the largest decrease, a difference of -0.71 mm/day. The contrasting monthly results indicate that the overall mean difference should not be read as a description of rainfall in every month.

Changes in sunshine duration

Mean daily sunshine duration, averaged across calendar months, had a difference of -0.19 hours/day compared with the earlier period. This summarizes monthly mean daily hours rather than sunshine on any particular day. Monthly differences varied: July had the largest increase, at +0.86 hours/day, whereas May had the largest decrease, a difference of -1.13 hours/day. The overall average therefore gives a broad comparison, not a claim that daily sunshine changed in the same direction in every month.