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Using the hourly electrical load data from 2002 to 2005 and the year to year data of electrical load in the recent 30 years in Tianjin, the characteristics of electrical load and its relationship with meteorological factors are analyzed. The results show that the long term interannual trend of electrical load in recent 30 years was dominantly influenced by the local GDP, whereas meteorological factors such as temperature showed no significant effect. At the seasonal and daily scales, the electrical load was obviously related with air temperature. Especially in July and August, if temperature increased 1 ℃, electrical load rose by about 120 MW. Besides the influence of temperature, relative humidity had remarkable effect on electrical load in summer and early autumn. Moreover, the effect of winds on electrical load should be considered in April, June, July, and December. Generally, extreme electrical load might appear when the maximum temperature was up to 30 ℃, and average humidity was more than 65% in summer.