Iceland has very mild, coastal weather, stemming from the Gulf Stream. The weather is also affected by the East Greenland polar current curving south-eastwards round the north and east coasts. The average summer temperature in Reykjavik is 10.6°C/51°F in July, with average highs of 24.3°C/76°F. The average winter temperature in Reykjavik is similar to New York City's, about 0°C/32°F in January (average highs are 9.9°C/50°C). The weather can be very unpredictable and often changes in an instant