 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 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.The differences are even more observed in North County, where coastal Oceanside maintains an average January low of 45 °F and August highs of 73 °F, while inland Escondido maintains average January lows of 42 °F and August highs of 89 °F.San Diego–Tijuana is also subject to El Niño weather events.