Climate Insights for Dieppe

The climate in Dieppe is cool. The average annual temperature is 7°C and approximately 1132mm of precipitation falls per year. Dieppe receives a notable amount of rainfall throughout the year, including during its driest month. Dieppe is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are February, January, December, when temperatures can drop to -10°C. Dieppe experiences heavy snowfall, typically from January through December.

Temperatures in Dieppe vary considerably across the year, with a 35°C difference between the coldest and warmest months. July is the warmest month, though highs remain moderate at 25°C with a mean of 20°C. The coldest month is February, when overnight lows fall to -10°C and the daily average is -6°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 7°C shift in average temperatures.

Dieppe is a moderately rainy area, receiving approximately 1132mm of precipitation annually, which averages out to around 94mm per month. The wettest month is November, averaging 113mm of rainfall. January and December also tend to see above-average precipitation. The driest month is September, with just 79mm. That's 34mm less than November, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Dieppe receives heavy snowfall, accumulating around 279cm annually from January through December. The snowiest month is January, with approximately 65cm. Winter travel should account for significant snow cover.

Dieppe is mildly breezy, with an average annual wind speed of 14km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 12km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 15km/h in winter, 14km/h in spring, 12km/h in summer, 13km/h in autumn.

It is currently autumn in Dieppe, which began on September 23, 2026. Dieppe is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 25°C, while the coldest stretch bottoms out in February near -10°C. Winter is next, beginning on December 21, 2026 (87 days from now).

The best time to visit Dieppe is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 89mm per month. By contrast, February can be quite cold with temperatures dropping to -10°C. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Dieppe based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.