Climate Change Chart of Bangalore, India

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +0.66 °C in the more recent period; this is an unweighted comparison of monthly means, not a day-weighted annual average or a measure of daytime maximum temperatures. The largest monthly increase was in July, with a difference of +1.06 °C. By contrast, February had the largest monthly decrease, a difference of -0.22 °C. These month-specific contrasts show that the overall mean difference does not describe every month or establish a continuous trend.

Changes in rainfall

Mean daily rainfall, rather than monthly rainfall totals, had an unweighted mean difference across calendar months of +0.37 mm/day in the more recent period compared with the earlier reference period. This aggregate does not imply that rainfall increased in every month. The largest monthly increase occurred in September, with a difference of +1.41 mm/day; the largest decrease was in April, at a difference of -0.61 mm/day. These are changes in monthly mean daily amounts, so they describe period averages rather than conditions on any particular day.

Changes in sunshine duration

Mean daily sunshine duration had an unweighted difference across calendar-month means of -0.27 hours/day. This summarizes the monthly averages and should not be read as a day-weighted annual figure or as a uniform change throughout the year. The largest monthly decrease was in November, with a difference of -0.74 hours/day, while August recorded the largest increase, at a difference of +0.29 hours/day. Together, these contrasting monthly results show why the mean difference alone cannot represent sunshine changes in every month.