An example of the regional temperature fluctuations is shown in the varying averages of downtown San Diego, averaging January lows of 50 °F and August highs of 78 °F; El Cajon, just 10 miles northeast of downtown San Diego, averaging January lows of 42 °F and August highs of 88 °F; Tijuana, averaging January lows of 45 °F and August highs of 78 °F.