In this study, the possible relationship between several climatic indices has been investigated using two methods, the lagged correlation and wavelet coherence. Based on the analysis, evidences of the presence of 11-year cycle of sunspot changes between SN and SOI signals were found. The results show that if the SN signal is considered as the cause and the SOI signal as the effect, the minimum value of the 11-year component of the SOI signal occurs about 3 years after the maximum value of the same component in the SN signal. The correlation method shows a weak linear relationship between other signals such as NAO, QBO, SOI and MO in all time lags, and the highest correlation in this case is between NAO and MO signals. However, a closer look at the wavelet coherence plots shows that these signals are strongly correlated at decadal and to some extent at inter-annual time scales.