Climate Change Chart of Tallahassee, USA

Overview of climate changes

Temperature changes

Averaged across calendar months, the difference in monthly mean temperature was +0.43 °C compared with the earlier reference period; this is an unweighted comparison of monthly means, not a day-weighted annual average or a measure of daytime highs. The month-specific differences show that the largest increase was in February, at +1.42 °C, while the largest decrease was in January, at -0.44 °C. These extrema describe differences between the reference periods in those months, not a continuous change through time or a uniform shift across every month.

Changes in rainfall

Mean daily rainfall, rather than monthly totals, had an unweighted average difference across calendar months of +0.72 mm/day compared with the earlier reference period. The month-to-month picture was not uniform: the largest increase occurred in June, with a difference of +1.77 mm/day, whereas March had the largest decrease, at -0.63 mm/day. These figures compare monthly mean daily amounts between the two periods and do not imply that rainfall changed in the same direction in every month.

Changes in sunshine duration

For mean daily sunshine duration, the unweighted difference averaged across calendar months was -0.03 hours/day compared with the earlier reference period. Monthly differences varied around that small overall mean: sunshine increased most in March, by +0.82 hours/day, while the largest decrease was in June, at -0.53 hours/day. These are differences in mean daily hours for the named months; they do not establish a continuous trend or describe every day within a month.

Changes in snowfall

The unweighted mean difference in daily snowfall across calendar months was +0.01 mm/day compared with the earlier reference period. The largest monthly increase was in January, with a difference of +0.09 mm/day. These small differences describe averages, not snowfall on any particular day; the rounded overall change should not be taken to mean that snowfall was absent or unchanged beyond the displayed precision.