Sleaford Temperature by Month
The average annual maximum temperature in Sleaford, Lincolnshire, United Kingdom is 15°C (59°F), with daytime highs ranging from 8°C (46°F) in February to 23°C (73°F) in July. This page covers monthly averages, day-night differences, and how Sleaford compares to cities worldwide.
Sleaford Monthly Temperatures
Depending on the time of the year, temperatures range from warm to cold in Sleaford. Nighttime lows follow the same pattern, ranging from 13°C (55°F) to 2°C (36°F).
The chart below illustrates the average maximum day and minimum night temperatures in Sleaford by month:
The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM. July, the city's warmest month, gets 207 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Sleaford 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.
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Sleaford vs World: Temperature Compared
Sleaford'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:
Seville, Spain averages 23°C (73°F) a year — one of the warmer cities in Western Europe, with long hot summers.
Reykjavík, Iceland averages 9°C (48°F) a year — mild summers by Icelandic standards, but cold winters and frequent wind.
Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.
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 Sleaford this rarely lasts long on the ground.
For more on Sleaford's weather — including monthly rainfall, sunshine hours, and humidity — visit our Sleaford climate page.
