There are good conditions for visiting in Red Sea in January. The temperature of the sea will be perfect at 23 °C (73 °F). There are only 1 day of rain in the whole month, so you can leave your umbrella at home. There are some people, who may feel a slight chill at 22 °C (71 °F), but others will feel perfectly fine. The average temperature in Cairo in January for a typical day ranges from a high of 66°F (19°C) to a low of 44°F (7°C). Some would describe it as moderately chilly with a gentle breeze. For comparison, the hottest month in Cairo, July, has days with highs of 102°F (39°C) and lows of 71°F (21°C). The coldest month, January has days with Water temperature in Marsa Alam in January. Is it warm enough to swim in Marsa Alam in January? Average water temperature in Marsa Alam in January is 23.3°C and therefore suitable for comfortable swimming. The warmest sea in Marsa Alam in January is 25°C, and the coldest is 21.5°C. Average high air temperature in Marsa Alam in January is 24 Get the monthly weather forecast for Sharm el Sheikh, South Sinai, Egypt, including daily high/low, historical averages, to help you plan ahead. xLeSM.