Granada weather is good on the whole, which only helps to cement the city's reputation as an excellent vacation destination. Throughout the year, Granada enjoys warm temperatures, especially when compared to more northerly European cities. Also, while the rainfall levels tend to go up in the cooler season, even winter visitors should find that the sun is shining on most days.
Spring: Spring is generally considered to be the very best time to visit Granada Spain. The weather is simply ideal on most days, and it doesn't hurt that some of the top Granada events are held during the spring season. These events include the annual festival that is the Granada Corpus Christi. Early spring days can bring frost, though it is relatively rare, and by the end of the season, the daytime temps are quite similar to what you might expect in the summer.
Summer: Spain's southern Andalucia region is known for being extremely warm during the summer season, and this region is where you will find Granada. Temperatures can top 100 degrees Fahrenheit with ease in Andalucia, with average daytime temps being around 90 degrees in most spots. Thankfully for Granada residents and visitors, the city is situated at an elevation of 2,240 feet above sea level. In the summer, this helps to keep it cooler than the Andalucia cities that are found at lower elevations, such as Seville. The average summer temperatures in Granada are in the mid-to-high 70s. In addition to being hot, summer in Granada is typically very dry, so visitors won't likely have to concern themselves too much with rainfall.
Fall: According to some travel insiders, autumn is the best time to travel to Granada Spain. For starters, the higher summer temps have all but gone. So too have the summer crowds. It is still warm on most days during the fall in Granada. This generally makes for good conditions regardless of your choice of activities. The earlier part of the season in particular is excellent for walking around town or hiking in the Sierra Nevadas. It should be noted that November averages around 2.7 inches of rain, making it the wettest month in Granada on average.
Winter: For skiing and snowboarding enthusiasts, the best time to visit Granada Spain is arguably the winter season. After all, one of Europe's most southerly ski resorts can be found near Granada in the Sierra Nevada mountains, and if it isn't snowing in the highlands, the resort can make its own. Down in Granada proper, snow is more rare, though it can get quite chilly during the winter months. The spirit of the holiday season can help keep visitors warm, as can some hot churros and chocolate. Most winter days are still fairly warm in Granada. The average temperatures for December, January, and February hover somewhere around 45 degrees.