Iserlohn Temperature by Month
The average annual maximum temperature in Iserlohn, North Rhine-Westphalia, Germany is 14°C (57°F), with daytime highs ranging from 5°C (41°F) in January to 24°C (75°F) in July. This page covers monthly averages, day-night differences, and how Iserlohn compares to cities worldwide.
Iserlohn Monthly Temperatures
The climate in Iserlohn is known for significant temperature differences throughout the year. At night, this contrast is just as clear, with lows ranging from 13°C (55°F) in July to 0°C (32°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Iserlohn 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 223 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Iserlohn vs Germany
The map below shows the annual temperature across Germany. You can also select individual months if you want to compare a specific time of year.
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Iserlohn vs World: Temperature Compared
Iserlohn'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:
Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short 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.
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.
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 Iserlohn this rarely lasts long on the ground.
For more on Iserlohn's weather — including monthly rainfall, sunshine hours, and humidity — visit our Iserlohn climate page.
