Climate Change Chart of Brandon, Canada

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +0.53 °C compared with the earlier reference period; this is an unweighted average of the monthly means, not a day-weighted annual average or a measure of daytime highs. The largest monthly increase was in June, at a difference of +2.23 °C, while October had the largest monthly decrease, a difference of -1.82 °C. These month-specific changes describe the contrast between reference periods, not a continuous change through time or a pattern shared by every month.

Changes in snowfall

Mean daily snowfall averaged across calendar months had a difference of +0.01 mm/day in the more recent period. This is an unweighted average of monthly means, not a day-weighted annual average, and the small displayed mean difference does not establish that every month was unchanged. Monthly contrasts varied: December had the largest increase, a difference of +1.36 mm/day, while May had the largest decrease, a difference of -1.79 mm/day. These are daily averages, not monthly snowfall totals, and describe differences between the two reference periods only.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months had a difference of -0.14 hours/day compared with the earlier reference period. This is an unweighted average of monthly means, rather than a day-weighted annual figure. The largest monthly increase was in June, with a difference of +1.09 hours/day; in October, the largest monthly decrease was a difference of -1.24 hours/day. The average and these month-specific differences summarize the comparison between reference periods, not a continuous trend or a uniform change across the calendar.

Changes in rainfall

Mean daily rainfall averaged across calendar months had a difference of +0.08 mm/day in the more recent period; this unweighted mean of monthly means is not a day-weighted annual average, and the figures describe daily averages rather than monthly totals. The largest monthly increase occurred in August, with a difference of +0.41 mm/day, whereas April recorded the largest decrease, a difference of -0.29 mm/day. These selected monthly contrasts show that the overall mean does not represent the direction or size of change in every month.