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Rennes has an oceanic climate (Koppen Cfb) with mild temperatures year-round, no real dry season, and relatively low sunshine compared to southern France. The city receives about 680 millimetres of rain spread across roughly 140 days per year, meaning you will likely see some precipitation regardless of when you visit. Winters are cool but rarely drop below freezing, while summers are warm without being uncomfortably hot. The Gulf Stream influence keeps temperatures moderate, though Rennes sits far enough inland to avoid the full maritime moderation that Brest or Quimper get on the Brittany coast. The table below breaks down the monthly averages to help you plan your packing list. best time to visit Rennes
Rennes Weather in January: Cool and Grey
January is the coldest month in Rennes with average highs of 8 degrees Celsius (46 degrees Fahrenheit) and lows of 3 degrees Celsius (37 degrees Fahrenheit). You will get about 65 millimetres of rain over 15 days, and sunshine is limited to roughly 2 hours per day. Frost is possible on 8 to 10 mornings during the month. Snow is rare but not unheard of; the city averages 2 to 3 light snow days per winter, usually in January or February. Pack a warm waterproof coat, scarf, and gloves. Indoor attractions like Les Champs Libres and the Musee des Beaux-Arts are good bets on wet days. For a full overview, see our Rennes travel guide.
Rennes Weather in February: Still Winter
February in Rennes sees average highs of 9 degrees Celsius (48 degrees Fahrenheit) and lows of 3 degrees Celsius (37 degrees Fahrenheit). Rainfall drops slightly to 50 millimetres over 13 days, and you will get about 3 hours of daily sunshine. The weather remains chilly and damp, but the days are noticeably longer by the end of the month. If you are visiting in February, the Travelling film festival usually runs during this period, giving you a solid indoor activity. Dress in layers with a waterproof outer layer. things to do in Rennes
Rennes Weather in March: Transitional
March brings the first hints of spring with average highs reaching 12 degrees Celsius (54 degrees Fahrenheit) and lows of 5 degrees Celsius (41 degrees Fahrenheit). Expect 50 millimetres of rain across 14 days and around 4 hours of daily sunshine. The weather can swing dramatically; you might get a sunny 16-degree day followed by a chilly 7-degree rainy one. The Thabor Park starts showing early blooms, and the Saturday market at Place des Lices becomes more enjoyable as temperatures rise. A light jacket and umbrella are essential. Rennes events and festivals
Rennes Weather in April: Spring Arrives
April in Rennes averages highs of 14 degrees Celsius (57 degrees Fahrenheit) and lows of 6 degrees Celsius (43 degrees Fahrenheit). Rainfall is moderate at 50 millimetres over 13 days, and sunshine increases to 5 hours per day. The Mythos Festival usually takes place in April, drawing crowds for storytelling, music, and spoken-word performances. Cherry blossoms and magnolias appear in the city’s parks. Pack a mix of short and long-sleeve shirts plus a rain jacket; you will likely use all of them. best neighborhoods in Rennes
Rennes Weather in May: Pleasant and Green
May is one of the best months to visit Rennes with average highs of 18 degrees Celsius (64 degrees Fahrenheit) and lows of 10 degrees Celsius (50 degrees Fahrenheit). Rainfall remains steady at 60 millimetres over 14 days, but you will get 6 hours of daily sunshine. The city turns lush and green, outdoor cafe terraces fill up along Place de la Mairie, and the Saturday market at Place des Lices is at its vibrant best. Light clothing with a sweater for evenings works well, and bring a compact umbrella just in case. where to stay in Rennes
Rennes Weather in June: Long Days, Mild Warmth
June in Rennes brings average highs of 21 degrees Celsius (70 degrees Fahrenheit) and lows of 13 degrees Celsius (55 degrees Fahrenheit). It is one of the drier months with 45 millimetres of rain over 10 days, and you will enjoy 7 hours of daily sunshine. The summer solstice gives you daylight until nearly 10 pm, making evening walks through the medieval old town especially pleasant. The Mercredis du Thabor concert series begins in the park. Light summer clothing is fine, but keep a light jacket for evenings when temperatures can dip to 13 degrees Celsius. Rennes travel tips and FAQ
Rennes Weather in July: Peak Summer
July is the warmest month in Rennes with average highs of 23 degrees Celsius (73 degrees Fahrenheit) and lows of 14 degrees Celsius (57 degrees Fahrenheit). Rainfall drops to 40 millimetres over 9 days, the driest month of the year, and sunshine averages 7.5 hours per day. Les Tombees de la Nuit festival transforms the city streets with free performances and installations throughout July. The weather is ideal for exploring on foot and enjoying the city’s many parks. Short sleeves and sunscreen are appropriate, though a light sweater may be needed after sunset.
Rennes Weather in August: Summer Continues
August in Rennes mirrors July with average highs of 23 degrees Celsius (73 degrees Fahrenheit) and lows of 14 degrees Celsius (57 degrees Fahrenheit). Rainfall is 45 millimetres over 10 days, and sunshine holds at 7 hours daily. Many locals take their annual holiday in August, so some smaller shops and restaurants may be closed, especially in the first two weeks. Tourist attractions remain open, and the city is quieter and more relaxed. The weather is great for day trips to Saint-Malo (45 minutes by train) or Mont Saint-Michel (1 hour by car).
Rennes Weather in September: Golden Autumn Start
September in Rennes sees average highs of 20 degrees Celsius (68 degrees Fahrenheit) and lows of 12 degrees Celsius (54 degrees Fahrenheit). Rainfall increases to 55 millimetres over 12 days, and sunshine drops to 5.5 hours per day. Early September often delivers some of the most pleasant weather of the year, with warm afternoons and crisp mornings. The university students return, bringing energy back to the city after the August lull. Light layers and a waterproof jacket will cover most conditions.
Rennes Weather in October: Autumn Colours
October in Rennes brings average highs of 16 degrees Celsius (61 degrees Fahrenheit) and lows of 9 degrees Celsius (48 degrees Fahrenheit). Expect 70 millimetres of rain over 15 days, making it a wetter month, and sunshine drops to 3.5 hours per day. The autumn colours in Thabor Park and along the Vilaine River are worth seeing. The weather can be unpredictable; you might get a beautiful sunny day or persistent drizzle. A warm sweater, raincoat, and waterproof shoes are recommended.
Rennes Weather in November: Grey and Damp
November in Rennes averages highs of 11 degrees Celsius (52 degrees Fahrenheit) and lows of 5 degrees Celsius (41 degrees Fahrenheit). It is the wettest month alongside December with 70 millimetres of rain over 16 days, and sunshine falls to just 2.5 hours per day. The Yaouank Breton music festival fills concert venues in mid-November, providing excellent indoor entertainment. Days are short, grey, and damp. Pack a heavy waterproof coat, warm layers, and waterproof footwear.
Rennes Weather in December: Festive and Cold
December in Rennes has average highs of 9 degrees Celsius (48 degrees Fahrenheit) and lows of 3 degrees Celsius (37 degrees Fahrenheit). Rainfall is 70 millimetres over 16 days, and sunshine is minimal at 2 hours per day. The Christmas market in the city centre brings mulled wine, craft stalls, and festive lights to the medieval squares. The Trans Musicales festival in early December is one of Europe’s most respected music discovery events. Frost is common, and occasional light snow is possible. Pack warm winter clothing and shoes you do not mind getting wet.
