Climate Change Chart of Springfield, USA

Overview of climate changes

Temperature changes

Monthly mean temperatures were higher by an unweighted average difference of +1.16 °C across calendar months in the more recent period; this summarizes the monthly means and is not a comparison of daytime maximum temperatures. The largest monthly increase was in December, at a difference of +2.60 °C compared with the earlier reference period. By contrast, October recorded the largest monthly decrease, a difference of -0.14 °C.

Changes in rainfall

Averaged across calendar months, mean daily rainfall had an unweighted increase of +0.22 mm/day in the more recent period; this is not a day-weighted annual average or a change in monthly totals. The largest monthly increase was in July, with a difference of +1.51 mm/day. In September, mean daily rainfall instead had the largest monthly decrease, a difference of -0.36 mm/day.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months had a small unweighted decrease of -0.02 hours/day in the more recent period, rather than representing a day-weighted annual average. Monthly differences varied: June had the largest increase, at +0.97 hours/day, while October had the largest decrease, at -0.81 hours/day. These are differences in monthly mean daily hours, not claims about every day in either period.

Changes in snowfall

The unweighted mean difference in mean daily snowfall across calendar months was an increase of +0.05 mm/day in the more recent period. This small aggregate difference does not mean snowfall was absent or unchanged in every month. The most pronounced monthly increase was in February, with a difference of +2.16 mm/day; December had the largest decrease, at -1.46 mm/day. These are daily mean amounts, not monthly snowfall totals.