Climate Change Chart of Surat, India

Overview of climate changes

Temperature changes

Averaged across calendar months, monthly mean temperature shows a difference of +0.76 °C compared with the earlier reference period; this unweighted mean of monthly means is not a day-weighted annual average, and it does not imply the same change in every month. The largest monthly increase was in April, with a difference of +1.93 °C, while January had the largest monthly decrease, at -0.34 °C. These are monthly mean temperatures, not daytime maximum temperatures.

Changes in rainfall

For mean daily rainfall, the unweighted mean difference across calendar months was +0.37 mm/day; this summarizes monthly means and is not a day-weighted annual average or a monthly total. The largest monthly increase occurred in September, at +6.17 mm/day, whereas July recorded the largest monthly decrease, at -3.18 mm/day. These monthly contrasts show that the overall mean difference does not describe every month in the same way.

Changes in sunshine duration

Mean daily sunshine duration averaged across calendar months had a difference of -0.25 hours/day compared with the earlier reference period. This is an unweighted comparison of monthly means, rather than a day-weighted annual average, so it should not be read as an identical shift in every month. The largest monthly decrease was in September, with a difference of -1.15 hours/day; in contrast, August had the largest monthly increase, at +0.26 hours/day.