Climate Change Chart of Ahmedabad, India

Overview of climate changes

Changes in rainfall

Averaged across calendar months, mean daily rainfall had a difference of +0.74 mm/day in the more recent period. This is an unweighted comparison of monthly means, not a day-weighted annual average or a monthly rainfall total. The strongest monthly increase in mean daily rainfall occurred in July, at +3.72 mm/day. In January, the largest monthly decrease was -0.16 mm/day; these extremes describe differences in daily averages for those months, rather than totals accumulated over a month.

Temperature changes

Across calendar months, the unweighted mean of monthly mean temperatures shows a difference of -0.11 °C compared with the earlier reference period; this describes the monthly averages collectively, not a change in daytime maximum temperatures or a uniform shift in every month. The largest monthly mean-temperature increase was in July, with a difference of +0.37 °C. By contrast, January had the largest decrease, at -1.44 °C, showing that the month-specific differences were not all in the same direction.

Changes in sunshine duration

The unweighted mean across calendar months shows a difference of -0.26 hours/day in mean daily sunshine duration compared with the earlier reference period. This summarizes monthly mean daily hours across the calendar, rather than indicating the same change in each month. The largest monthly decrease was in September, with a difference of -1.07 hours/day in mean daily sunshine. The largest increase was in August, at +0.15 hours/day, so the monthly differences varied in direction.