Hay-on-Wye Temperature by Month
Hay-on-Wye, Powys, United Kingdom has an average annual maximum temperature of 14°C (57°F), ranging from 8°C (46°F) in January to 20°C (68°F) in July. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Hay-on-Wye Monthly Temperatures
In Hay-on-Wye, temperatures differ significantly between summer and winter months. Nighttime lows reflect this range, dropping from 11°C (52°F) in July to 2°C (36°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Hay-on-Wye by month:
From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. July, the warmest month, averages 199 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Hay-on-Wye vs the United Kingdom
The map below shows the annual temperature across the United Kingdom. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Hay-on-Wye vs World: Temperature Compared
Hay-on-Wye's average annual maximum temperature is 14°C (57°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.
Glasgow, Scotland averages 13°C (55°F) a year — mild but often grey, with cold winters and rarely hot summers.
Buenos Aires, Argentina averages 23°C (73°F) a year, with hot summers and mild winters — and seasons reversed compared to Europe.
Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.
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.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Hay-on-Wye this rarely lasts long on the ground.
For more on Hay-on-Wye's weather — including monthly rainfall, sunshine hours, and humidity — visit our Hay-on-Wye climate page.
