Climate Change Chart of Nara, Japan

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperatures show a difference of +1.17 °C compared with the earlier reference period. This is an unweighted comparison of monthly means, not a day-weighted annual average, and monthly mean temperature should not be read as a daytime maximum. The largest monthly increase occurred in March, with a difference of +2.00 °C; that identifies the strongest increase among the reported monthly differences, not a change shared by every month.

Changes in rainfall

Mean daily rainfall averaged across calendar months shows a difference of +1.84 mm/day compared with the earlier reference period. This unweighted mean of monthly means describes the aggregate pattern rather than every month, and the figures are daily averages, not monthly rainfall totals. The largest monthly increase was in August, where mean daily rainfall had a difference of +3.53 mm/day. This points to a particularly notable monthly change without implying that rainfall increased by the same amount in other months.

Changes in sunshine duration

Mean daily sunshine duration, averaged across calendar months, shows a difference of -0.54 hours/day compared with the earlier reference period. This is an unweighted mean across monthly averages, not a day-weighted annual figure, and it describes mean daily hours rather than sunshine on every individual day. The largest monthly decrease was in January, with a difference of -1.10 hours/day; this marks the strongest reported monthly reduction, not a uniform decrease across the calendar.

Changes in snowfall

Mean daily snowfall averaged across calendar months has a difference of 0.00 mm/day at the displayed precision. That rounded equality does not establish that snowfall was unchanged at finer precision or in every month; the mean is an unweighted comparison of monthly averages, and the values are daily means rather than monthly totals. Monthly differences vary: the largest increase was in January, at +0.66 mm/day, while the largest decrease was in February, at -0.44 mm/day. These opposing monthly changes help explain why the displayed overall mean difference is zero, without implying that snowfall was absent.