3.2.2 Seasonal rainfall trend analysis The amount of rainfall in the main rainy season (June–August) is dominated by a downward trend (80%), with the exception of Bedele and Nekemte, which are the only two stations that had a positive trend without statistically significant ( Table 4 ).
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Evidences of climate change presences in the wettest parts of southwest Ethiopia.
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At a seasonal scale, the amount of rainfall in the main rainy season (June to August) is dominated by a downward trend (eight out of ten stations) while, the autumn season (September to November) shows an increasing trend in all stations with statistically significant at one station.
Some studies reported a decreasing trend in seasonal and annual rainfall ( Hill and Porter, 2017 ; Asfaw et al., 2018 ).
The trend analysis of rainfall during the main rainy and crop growing season (JJA) showed a negative trend in most stations (80%) in the study area.