Climate Change Chart of Saitama, Japan

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature was higher by +1.54 °C in the more recent reference period; this unweighted mean difference describes the calendar-month averages, not every month or daytime maximum temperatures. The largest monthly mean temperature increase was in March, with a difference of +2.71 °C compared with the earlier reference period. This marks the strongest monthly increase, not a uniform rise throughout the year.

Changes in rainfall

Mean daily rainfall, averaged across calendar months, increased by +1.05 mm/day; this is a difference in monthly averages, not a change in monthly rainfall totals or a statement about every month. The largest monthly increase in mean daily rainfall occurred in October, at +2.50 mm/day. By contrast, November had the largest monthly decrease, a difference of -0.06 mm/day.

Changes in snowfall

Mean daily snowfall averaged across calendar months increased by +0.24 mm/day. The largest monthly snowfall increase was in February, at +1.79 mm/day, while the largest decrease was in March, a difference of -0.32 mm/day; these daily averages do not indicate snowfall on any particular visit.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months decreased by -0.32 hours/day. The largest monthly decrease was in February, a difference of -0.85 hours/day, while June had the largest increase, at +0.60 hours/day.