Hertford Temperature by Month

Hertford in Hertfordshire, United Kingdom sees significant seasonal temperature differences, with daytime highs between 8°C (46°F) in January and 23°C (73°F) in July, averaging 15°C (59°F) annually. Explore the full monthly breakdown below.

The weather in Hertford experiences significant differences between warm and cold seasons, with big shifts in temperature. At night, minimum temperatures range from 13°C (55°F) in July to 2°C (36°F) in January.

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

Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating. July, the warmest month of the year, receives 211 hours of sunshine.

The chart below shows the average temperature throughout the year:

Hertford'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:

Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.

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

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

Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.

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