Dedham Temperature by Month

The average annual maximum temperature in Dedham, Essex, United Kingdom is 15°C (59°F), with daytime highs ranging from 8°C (46°F) in January to 22°C (72°F) in August. This page covers monthly averages, day-night differences, and how Dedham compares to cities worldwide.

Depending on the time of the year, temperatures range from pleasant to cold in Dedham. Nighttime lows follow the same pattern, ranging from 15°C (59°F) to 3°C (37°F).

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

The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest. August, the warmest month, gets 205 hours of sunshine.

The chart below shows the average temperature throughout the year:

Dedham'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:

Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.

Interlaken, Switzerland averages 8°C (46°F) a year, with cold winters and cool summers thanks to its Alpine setting.

Beijing, China averages 20°C (68°F) annually, but with big seasonal swings, very cold winters and hot summers.

Melbourne, Australia averages 20°C (68°F) annually, known for unpredictable weather, with four seasons sometimes happening in one day.

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 Dedham's weather, including monthly rainfall, sunshine hours, and humidity, visit our Dedham climate page.