Weather pattern historical frequency occurrences (1979 to 2016)

RESEARCH PROTOTYPE

Weather pattern monthly and annual historical frequency occurrences
(Probabilities in each column add up to 100%)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Pattern Category Annual
Pattern 1 (IMD | ERA-I) 2.0% 1.1% 0.6% 0.4% 8.0% 30.3% 20.0% Retreating Monsoon 5.21%
Pattern 2 (IMD | ERA-I) 19.0% 11.5% 5.5% 0.4% 0.4% 3.2% 15.8% Autumn Dry Period 4.63%
Pattern 3 (IMD | ERA-I) 16.7% 7.7% 3.1% 0.1% 0.3% 4.4% 20.5% Autumn Dry Period 4.42%
Pattern 4 (IMD | ERA-I) 2.9% 20.6% 12.3% 12.1% 3.2% Break Monsoon 4.27%
Pattern 5 (IMD | ERA-I) 0.1% 2.8% 12.4% 31.3% 4.2% 0.1% Western Disturbances 4.21%
Pattern 6 (IMD | ERA-I) 0.8% 0.6% 0.6% 0.4% 0.6% 0.7% 18.1% 21.6% 6.2% Retreating Monsoon 4.14%
Pattern 7 (IMD | ERA-I) 9.3% 14.9% 10.0% 5.6% 0.1% 0.5% 2.3% 4.2% Autumn Dry Period 3.85%
Pattern 8 (IMD | ERA-I) 5.0% 14.0% 20.7% 4.1% 0.1% 0.7% Autumn Dry Period 3.67%
Pattern 9 (IMD | ERA-I) 19.5% 7.0% 1.6% 0.8% 3.1% 11.8% Autumn Dry Period 3.65%
Pattern 10 (IMD | ERA-I) 0.3% 10.1% 15.6% 15.5% 1.7% Active Monsoon 3.63%
Pattern 11 (IMD | ERA-I) 0.6% 4.6% 21.2% 13.2% 3.5% Break Monsoon 3.63%
Pattern 12 (IMD | ERA-I) 0.4% 0.5% 5.6% 20.0% 10.0% 0.2% 1.1% 2.7% 0.7% 0.3% Post-Monsoon 3.46%
Pattern 13 (IMD | ERA-I) 1.8% 9.9% 4.6% 0.4% 3.1% 16.9% 4.5% 0.1% Post-Monsoon 3.44%
Pattern 14 (IMD | ERA-I) 4.5% 8.6% 1.8% 10.1% 15.4% 0.5% Pre/Post-Monsoon 3.4%
Pattern 15 (IMD | ERA-I) 0.2% 1.6% 19.0% 2.2% 0.1% 8.8% 6.9% 0.7% 0.2% Post-Monsoon 3.32%
Pattern 16 (IMD | ERA-I) 6.7% 11.9% 16.0% 2.0% 0.3% 0.1% 0.9% 1.6% Autumn Dry Period 3.26%
Pattern 17 (IMD | ERA-I) 0.1% 5.5% 11.0% 13.2% 8.7% 0.3% Active Monsoon 3.24%
Pattern 18 (IMD | ERA-I) 0.3% 0.1% 0.2% 0.4% 10.3% 19.3% 8.0% Retreating Monsoon 3.21%
Pattern 19 (IMD | ERA-I) 6.8% 18.7% 11.2% 0.2% Active Monsoon 3.11%
Pattern 20 (IMD | ERA-I) 12.5% 11.6% 7.0% 0.9% 0.2% 0.5% 4.8% Autumn Dry Period 3.09%
Pattern 21 (IMD | ERA-I) 9.0% 12.2% 13.6% 1.7% Active Monsoon 3.07%
Pattern 22 (IMD | ERA-I) 0.3% 18.8% 7.5% 0.5% 0.8% 4.9% 2.5% Post-Monsoon 2.96%
Pattern 23 (IMD | ERA-I) 0.7% 4.0% 9.7% 14.2% 3.4% 0.1% 0.5% 0.3% 0.2% Western Disturbances 2.73%
Pattern 24 (IMD | ERA-I) 1.1% 14.1% 16.3% 0.1% 0.4% 0.2% 0.3% Western Disturbances 2.72%
Pattern 25 (IMD | ERA-I) 1.3% 1.7% 0.1% 3.2% 16.3% 7.6% 1.5% Retreating Monsoon 2.66%
Pattern 26 (IMD | ERA-I) 2.5% 17.7% 5.6% 3.5% 1.1% 0.2% Monsoon Onset 2.54%
Pattern 27 (IMD | ERA-I) 6.8% 12.5% 5.9% 1.3% 0.3% 0.2% 0.3% 3.6% Western Disturbances 2.51%
Pattern 28 (IMD | ERA-I) 2.0% 1.1% 0.7% 3.3% 19.1% 3.5% Retreating Monsoon 2.46%
Pattern 29 (IMD | ERA-I) 0.1% 0.7% 0.6% 0.2% 4.3% 13.5% 3.9% 0.2% Retreating Monsoon 1.97%
Pattern 30 (IMD | ERA-I) 1.6% 1.0% 0.2% 4.8% 9.7% 1.0% 0.1% Retreating Monsoon 1.53%

Page created at 16:53:29 (IST local time) on Monday 27 October 2025

Data provided by the Met Office and NCMRWF, MoES
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