Grouville Temperature by Month

Grouville, Jersey, United Kingdom has an average annual maximum temperature of 15°C (59°F), with moderate seasonal shifts ranging from 10°C (50°F) in February to 20°C (68°F) in August. Below you'll find a full monthly breakdown and a comparison with cities worldwide.

In Grouville, seasonal changes bring about a moderate variation in temperatures. Nighttime lows range from 17°C (63°F) in August to 7°C (45°F) in February.

The chart below illustrates the average maximum day and minimum night temperatures in Grouville by month:

The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM. August, the city's warmest month, gets 232 hours of sunshine.

The chart below shows the average temperature throughout the year:

Grouville's average annual maximum temperature is 15°C (59°F). To put that in context, here's how it compares to a few well-known destinations:

Lisbon, Portugal averages 21°C (70°F) annually, warm summers, mild winters, and rain mainly in the cooler months.

Reykjavík, Iceland averages 9°C (48°F) a year, mild summers by Icelandic standards, but cold winters and frequent wind.

Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.

Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

For more on Grouville's weather, including monthly rainfall, sunshine hours, and humidity, visit our Grouville climate page.