The diffuse interstellar bands (DIBs) observed in the optical and infrared spectrum of interstellar clouds remain the oldest unsolved problem in spectroscopy. We have analyzed correlations between normalized DIBs equivalent widths (EW's) and temperatures of interstellar H2 and CN molecules. The λ6284 Å DIB is well correlated with T temperature of H2. The correlation may be caused by DIB profile broadening or more effective production of DIB carrier at higher temperatures. The DIBs: λ4964 Å, λ5797 Å and λ6614 Å are anti-correlated with T temperature of H2. The anti-correlation may be attributed to destruction of DIBs carriers in high-UV radiation fields.
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