Sussex (NB) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Sussex.
Climate overview of Sussex
Sussex, New Brunswick, Canada, sees big temperature differences between seasons, with July peaking at 25°C (77°F) and January dropping to -2°C (28°F).
With around 1235 mm (49 in) of annual rain/snowfall, Sussex has a notably wet climate. The wettest month is December. The sunniest month is July, with 8.5 hours of sunshine per day on average.
Sussex Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Sussex — and find the best time to visit.
Monthly Temperature in Sussex
Visitors to Sussex can expect significant temperature changes throughout the year. Average daytime temperatures reach a comfortable 25°C (77°F) in July. In January, the coolest month of the year, temperatures drop to a very cold -2°C (28°F).
At night, temperatures range from around 14°C (57°F) in July to -14°C (7°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Sussex
Sussex is known for its substantial rain/snowfall, with annual precipitation reaching 1235 mm (49 in). Despite minor fluctuations, Sussex enjoys fairly consistent precipitation throughout the year. In December, you can expect around 122 mm (4.8 in) of precipitation, while in August, Sussex receives about 83 mm (3.3 in). For more details, please visit our Sussex Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Sussex
Sussex can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 8.5 hours of sunshine daily. In contrast, the city experiences much darker days in November, with only 3.2 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Best Time to Visit Sussex
The weather does bring rainfall during this period, between 83 mm (3.3 in) and 105 mm (4.1 in). Wondering where to travel based on your weather preferences? Our recommendation tool helps you find destinations with your ideal climate conditions. Use our weather planner to find your perfect destination.
Frequently asked questions about the climate in Sussex
What is the best time to visit Sussex?
July and August typically offer the most optimal weather in Sussex. In contrast, January, February, March, April, November and December tend to have less optimal conditions.
What temperatures can I expect in Sussex?
Daytime highs range from -2°C (28°F) in January to 25°C (77°F) in July. Nighttime lows range from -14°C (7°F) to 14°C (57°F). Temperatures vary considerably through the year.
How much rain does Sussex get?
Annual rainfall is around 1235 mm (49 in). December is the wettest month with 122 mm (4.8 in), while August is the driest with 83 mm (3.3 in). In the coldest months, precipitation may fall as snow.
How sunny is Sussex?
Sussex receives around 1,998 hours of sunshine per year. July is the sunniest month with 256 hours, while November is the cloudiest with just 95 hours.
Sussex 3-Day Forecast
Sussex (NB) 3-Day Forecast
Sussex on the map
Sussex is highlighted — select any city to see its climate.
Popular this month
Where to go in July — average daytime high across popular destinations.
Niagara Falls
27°C (81°F) Montréal28°C (82°F) Ottawa27°C (81°F) Quebec City
26°C (79°F) Toronto26°C (79°F) Calgary24°C (75°F) Vancouver22°C (72°F) Whistler
19°C (66°F) 
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