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Weeds are one of the important biotic factor, compete the crop for its resources and difficult to eliminate completely from agricultural system. Weeds respond very quickly to stress and adopt easily than crops to climatic stress. In this context, a pot culture experiment in climate control chamber with three temperature levels (0°C, +2°C and +4°C increase over the ambient) and two moisture levels (supply of moisture at 100 %, and 60 % ET of previous day) was carried out at Agro Climate Research Centre, Tamil Nadu Agricultural University, Coimbatore during 2015 -16 to understand weeds response to future climate scenarios. The results inferred that, the problematic weed Cynodon dactylon had high acclimatization capacity and produced more growth under elevated temperature up to +4°C with sufficient moisture. The C4 pathway of bermuda grass helps that weed to utilise the moisture and temperature more efficiently even during stress and produce more growth. Moisture stress with increased temperature had negative effect on growth, but induced the early flowering and more seed production in Cynodon dactylon. It is concluded that, in near future with elevated temperature, the crop production in both dry and wet seasons would suffer from severe Cynodon dactylon menace. Hence, necessary precaution measures against Cynodon dactylon have to be included in climate change adaptation technologies. [ABSTRACT FROM AUTHOR]