Climate Change Chart of Baton Rouge, USA

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +0.82 °C compared with the earlier reference period; this is an unweighted mean of the monthly means, not a day-weighted annual average or a measure of daytime maximum temperatures. The largest monthly increase was in March, with a difference of +1.59 °C. That identifies the strongest increase among the supplied monthly differences, rather than implying that every month warmed by the same amount.

Changes in rainfall

Mean daily rainfall averaged across calendar months had a difference of +0.43 mm/day in the more recent period; this unweighted mean describes the monthly averages, not monthly rainfall totals or a day-weighted annual amount. The monthly pattern was not uniform: August recorded the largest increase, a difference of +3.49 mm/day, while March recorded the largest decrease, a difference of -1.42 mm/day. These extrema show contrasting monthly changes, but do not establish that other months followed either direction.

Changes in sunshine duration

Mean daily sunshine duration, averaged across calendar months, had a difference of -0.14 hours/day compared with the earlier period; this is an unweighted average of monthly means, not a day-weighted annual figure. Monthly differences varied: the largest increase was in January, at +0.33 hours/day, whereas the largest decrease was in August, at -0.95 hours/day. These monthly extremes help qualify the overall mean difference and should not be read as a uniform change across the year.

Changes in snowfall

Averaged across calendar months, mean daily snowfall had a difference of 0.00 mm/day at the displayed precision. That rounded mean does not show that snowfall was absent or that every month was unchanged: January had the largest decrease, a difference of -0.16 mm/day, while December had the largest increase, a difference of +0.07 mm/day. These are daily-mean amounts, not monthly snowfall totals.