File name: ENSOblog_NAM-pct-avg_map_20210819_large.png Original Resolution: 1200 × 816 File Size: 205 KB (MIME Type: image/png) Date Published: August 31, 2021 Download file View image caption Percent of total annual precipitation occurring during July–September, based on 1979–2020 using CPC Unified rain-gauge-based data. Figure by climate.gov.