An analysis of the daily district wise rainfall data from India Meteorological Department (IMD) for the month of Aug 2023, shows that there were 500 (667 in Aug 2022[i] and 431 in Aug 2021) instances when district rainfall of a day in a district was above 50 mm. Such high rainfall instances included 424 (553 in Aug 2022 and 371 in Aug 2021) instances when rainfall was 50-100 mm, 67 (98 in Aug 2022 and 48 in Aug 2021) instances when it was 100-150 mm, 5 (13 in Aug 2022 and 11 in Aug 2021) times it was 150-200 mm and 4 (3 in Aug 2022 and 1 in Aug 2021) above 200 mm. Interestingly, in June 2023[ii] and July 2023[iii] there were 451 and 855 instances when rainfall was above 50 mm, while in June 2022[iv] and July 2022[v] there were 462 and 809 instances when rainfall in a district was above 50 mm. The July 2023[vi] and June 2023[vii] rainfall over India was 13.1% above normal and 10.1% below normal respectively, while the July 2022[viii] and June 2022[ix] rainfall all over India was 16.8% above normal and 8% below normal respectively.
Out of 717 districts of India, 262 (308 in Aug 2022) districts or about 36.5% (43.8% in Aug 2022) of the districts experienced such high rainfall in August 2023, many of these districts had more than one such high rainfall days. The highest number of such instances were seen in Uttar Pradesh, where for the 75 districts (39 of them had such instances, 36 did not) there were 64 instances when rainfall was above 50 mm in this month. MP was second with 51 instances involving 29 of it’s 52 districts.
Among the five regions of India (North, South, East, West and North East), East India had the highest number of such instances (177), followed by NE India (153) and West India (86). South India had the least such instances at 416.
North East India In the table below are given the number of such high rainfall district days in each of the states in North East India in each of the high rainfall categories in August 2023.
| State | Districts that had over 50 mm rainfall at least on one day in Aug 2023 (Total no of districts) | No of district days when rainfall 50-100 mm | No of district days when Rainfall 100-150 mm | No of district days when Rainfall 150-200 | No of district days when Rainfall over 200 mm | Total no of district days when rainfall over 50 mm |
| Arunachal Pradesh | 8 (16) | 25 | 3 | 0 | 0 | 28 |
| Assam | 15 (27) | 28 | 6 | 0 | 0 | 34 |
| Meghalaya | 10 (11) | 32 | 4 | 1 | 2 | 39 |
| Nagaland | 6 (11) | 9 | 0 | 0 | 0 | 9 |
| Manipur | 4 (9) | 5 | 0 | 0 | 0 | 5 |
| Mizoram | 7 (8) | 13 | 0 | 0 | 0 | 13 |
| Tripura | 6 (8) | 13 | 4 | 0 | 0 | 17 |
| Sikkim | 3 (4) | 7 | 1 | 0 | 0 | 8 |
| North East India | 59 (94) | 132 (55) | 18 (7) | 1 (1) | 2 (0) | 153 (63) |
East India
| State | Districts that had over 50 mm rainfall at least on one day in Aug 2023 (Total no of districts) | No of district days when rainfall 50-100 mm | No of district days when Rainfall 100-150 mm | No of district days when Rainfall 150-200 | No of district days when Rainfall over 200 mm | Total no of district days when rainfall over 50 mm |
| W Bengal | 12 (19) | 24 | 2 | 0 | 0 | 26 |
| Odisha | 22 (30) | 21 | 9 | 0 | 2 | 32 |
| Jharkhand | 7 (24) | 10 | 2 | 0 | 0 | 12 |
| Bihar | 23 (38) | 35 | 7 | 1 | 0 | 43 |
| Uttar Pradesh | 39 (75) | 59 | 5 | 0 | 0 | 64 |
| East India | 101 (186) | 149 (145) | 25 (20) | 1 (2) | 2 (0) | 177 (167) |
North India
| State/ Union Territory | Districts that had over 50 mm rainfall at least on one day in Aug 2023 (Total no of districts) | No of district days when rainfall 50-100 mm | No of district days when Rainfall 100-150 mm | No of district days when Rainfall 150-200 | No of district days when Rainfall over 200 mm | Total no of district days when rainfall over 50 mm |
| Uttarakhand | 8 (13) | 20 | 1 | 1 | 0 | 22 |
| Haryana | 4 (22) | 5 | 0 | 0 | 0 | 5 |
| Chandigarh | 1 (1) | 2 | 0 | 0 | 0 | 2 |
| Delhi | 4 (9) | 4 | 0 | 0 | 0 | 4 |
| Punjab | 2 (22) | 2 | 0 | 0 | 0 | 2 |
| Himachal Pradesh | 8 (12) | 20 | 5 | 2 | 0 | 27 |
| Jammu & Kashmir | 3 (20) | 5 | 1 | 0 | 0 | 6 |
| Ladakh | 0 (2) | 0 | 0 | 0 | 0 | 0 |
| North India | 30 (101) | 58 (37) | 7 (8) | 3 (0) | 0 (0) | 68 (45) |
West India
| State | Districts that had over 50 mm rainfall at least on one day in Aug 2023 (Total no of districts) | No of district days when rainfall 50-100 mm | No of district days when Rainfall 100-150 mm | No of district days when Rainfall 150-200 | No of district days when Rainfall over 200 mm | Total no of district days when rainfall over 50 mm |
| Rajasthan | 5 (33) | 5 | 0 | 0 | 0 | 5 |
| Madhya Pradesh | 29 (52) | 38 | 13 | 0 | 0 | 51 |
| Diu Daman | 0 (2) | 0 | 0 | 0 | 0 | 0 |
| Gujarat | 0 (33) | 0 | 0 | 0 | 0 | 0 |
| Dadra Nagarhaveli | 0 (1) | 0 | 0 | 0 | 0 | 0 |
| Goa | 1 (2) | 1 | 0 | 0 | 0 | 1 |
| Maharashtra | 5 (36) | 6 | 0 | 0 | 0 | 6 |
| Chhattisgarh | 19 (27) | 20 | 3 | 0 | 0 | 23 |
| West India | 59 (186) | 70 (221) | 16 (49) | 0 (9) | 0 (3) | 86 (282) |
South India
| State | Districts that had over 50 mm rainfall at least on one day in Aug 2023 (Total no of districts) | No of district days when rainfall 50-100 mm | No of district days when Rainfall 100-150 mm | No of district days when Rainfall 150-200 | No of district days when Rainfall over 200 mm | Total no of district days when rainfall over 50 mm |
| Andhra Pradesh | 0 (26) | 0 | 0 | 0 | 0 | 0 |
| Telangana | 6 (33) | 6 | 0 | 0 | 0 | 6 |
| Tamil Nadu | 0 (38) | 0 | 0 | 0 | 0 | 0 |
| Puducherry | 2 (4) | 3 | 0 | 0 | 0 | 3 |
| Karnataka | 2 (31) | 2 | 0 | 0 | 0 | 2 |
| Kerala | 1 (14) | 1 | 0 | 0 | 0 | 1 |
| Lakshadweep | 0 (1) | 0 | 0 | 0 | 0 | 0 |
| Andaman & Nicobar | 2 (3) | 3 | 1 | 0 | 0 | 4 |
| South India | 13 (150) | 15 (97) | 1 (12) | 0 (1) | 0 (0) | 16 (110) |
INDIA The table below gives region wise figures for high rainfall days for Aug 2023.
| Region | Districts that had over 50 mm rainfall at least on one day in Aug 2023 (Total no of districts) | No of district days when rainfall 50-100 mm | No of district days when Rainfall 100-150 mm | No of district days when Rainfall 150-200 | No of district days when Rainfall over 200 mm | Total no of district days when rainfall over 50 mm |
| North East | 59 (94) | 132 | 18 | 1 | 2 | 153 |
| East | 101 (186) | 149 | 25 | 1 | 2 | 177 |
| North | 30 (101) | 58 | 7 | 3 | 0 | 68 |
| West | 59 (186) | 70 | 16 | 0 | 0 | 86 |
| South | 13 (150) | 15 | 1 | 0 | 0 | 16 |
| INDIA | 262 (717) | 424 (555) | 67 (96) | 5 (13) | 4 (3) | 500 (667) |
The Month-wise figures for the three months of 2023 SW Monsoon for all India are given below.
| Month | Rainfall, mm | Districts that had over 50 mm rainfall at least on one day in Jun-Aug 2023 (Total no of districts) | No of district days when rainfall 50-100 mm | No of district days when rainfall 100-150 mm | No of district days when rainfall 150-200 mm | No of dist days when rainfall over 200 mm | Total No of Dist Days when rainfall over 50 mm |
| June 2023 | 148.6 | 214 | 370 | 59 | 16 | 6 | 451 |
| July 2023 | 318.4 | 318 | 660 | 149 | 34 | 12 | 855 |
| Aug 2023 | 162.7 | 262 | 424 | 67 | 5 | 4 | 500 |
| JJA 2023 | 629.7 | 488 (717) | 1454 | 275 | 55 | 22 | 1806 |
SANDRP (ht.sandrp@gmail.com)
[i] https://sandrp.in/2022/09/01/june-aug-2022-district-wise-rainfall-in-in-indias-sw-monsoon/
[ii] https://sandrp.in/2023/07/09/june-2023-high-rainfall-district-days-in-indias-sw-monsoon/
[iii] https://sandrp.in/2023/08/07/high-rainfall-days-in-indias-districts-in-july-2023/
[iv] https://sandrp.in/2022/07/14/june-2022-high-rainfall-district-days-in-indias-sw-monsoon/
[v] https://sandrp.in/2022/08/12/high-rainfall-days-in-indias-districts-in-july-2022/
[vi] https://sandrp.in/2023/08/04/june-july-2023-district-wise-rainfall-in-in-indias-sw-monsoon/
[vii] https://sandrp.in/2023/07/07/june-2023-district-wise-rainfall-in-indias-sw-monsoon/
[viii] https://sandrp.in/2022/08/05/june-july-2022-district-wise-rainfall-in-in-indias-sw-monsoon/
[ix] https://sandrp.in/2022/06/30/june-2022-district-wise-rainfall-in-in-indias-sw-monsoon/
SANDRP 