Climate Change Chart of Mississauga, Canada

Overview of climate changes

Temperature changes

Monthly mean temperatures were higher on average across calendar months in the more recent period, with a difference of +1.08 °C. This unweighted comparison of monthly means describes an overall average, not daytime maximum temperatures or a change shared by every month. The largest monthly increase was in May, at +2.61 °C, while November had the largest decrease, of -0.73 °C.

Changes in rainfall

Mean daily rainfall averaged across calendar months showed a difference of +0.03 mm/day in the more recent period. This is an unweighted average of monthly means, not a day-weighted annual figure or a monthly rainfall total, and it does not imply that rainfall increased in every month. The largest monthly increase was in April, with a difference of +1.08 mm/day; in May, the largest decrease was -1.20 mm/day.

Changes in sunshine duration

Mean daily sunshine duration was lower on average across calendar months, with a difference of -0.32 hours/day compared with the earlier reference period. This unweighted average of monthly means does not establish the same change in every month. The largest increase occurred in May, at +0.94 hours/day, whereas October recorded the largest decrease, of -1.24 hours/day.

Changes in snowfall

Mean daily snowfall averaged across calendar months had a difference of -0.51 mm/day in the more recent period. This unweighted comparison of monthly means describes an aggregate difference, not a monthly total or a uniform change across the year. The largest monthly increase was in February, at +1.14 mm/day, while the largest decrease occurred in April, at -2.15 mm/day.