Climate Change Chart of Fredericton, Canada

Overview of climate changes

Temperature changes

The mean difference across calendar-month temperature averages is +0.99 °C. This summarizes the shift between the two sets of monthly means; it does not mean that every month was warmer. The clearest monthly increase was in December, at a difference of +2.87 °C, while March had the largest decrease, with a difference of -0.12 °C. These are monthly mean temperatures, not daytime highs.

Changes in snowfall

The unweighted mean difference across calendar-month mean daily snowfall amounts was +0.27 mm/day. Monthly changes varied: December had the largest increase, with a difference of +2.72 mm/day, while April had the largest decrease, at -2.05 mm/day. These are mean daily amounts for the named months, not monthly totals; the overall mean does not imply an increase in every month.

Changes in rainfall

Averaged across calendar months, mean daily rainfall had a difference of +0.26 mm/day. This is an unweighted summary of monthly averages, not a day-weighted annual figure or a monthly rainfall total. The largest monthly increase was in December, with a difference of +1.25 mm/day; in November, the largest decrease was -0.69 mm/day. These comparisons describe mean daily amounts in the named months, not the rainfall on every day.

Changes in sunshine duration

Mean daily sunshine duration, averaged across calendar months, had a difference of -0.29 hours/day. This aggregate does not imply the same change in every month. The largest monthly increase was in November, at +0.50 hours/day, whereas December recorded the largest decrease, at -0.77 hours/day. These are differences in mean daily hours, rather than total sunshine over a month.