Sparta (WI) Temperature by Month
The average annual maximum temperature in Sparta, Wisconsin, United States of America is 13°C (55°F), with daytime highs ranging from -4°C (25°F) in January to 28°C (82°F) in July. This page covers monthly averages, day-night differences, and how Sparta compares to cities worldwide.
Sparta Monthly Temperatures
Visitors to Sparta will encounter a climate influenced by big temperature differences across the year. Nighttime temperatures range from 16°C (61°F) in July to -14°C (7°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Sparta 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.
The chart below shows the average temperature throughout the year:
Temperature: Sparta vs the United States of America
The map below shows the annual temperature across the United States of America. You can also select individual months if you want to compare a specific time of year.
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moderate
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Sparta vs World: Temperature Compared
Sparta's average annual maximum temperature is 13°C (55°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.
Reykjavík, Iceland averages 9°C (48°F) a year — mild summers by Icelandic standards, but cold winters and frequent wind.
Buenos Aires, Argentina averages 23°C (73°F) a year, with hot summers and mild winters — and seasons reversed compared to Europe.
Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.
What Does the Temperature Feel Like in Sparta?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.
In Sparta, January is the coolest month, with average highs of -4°C (25°F) and humidity around 71% — considered high. In July, the warmest month, temperatures average 28°C (82°F) with 71% humidity — conditions that feel high. For a full picture, see our humidity page.
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 Sparta this rarely lasts long on the ground.
For more on Sparta's weather — including monthly rainfall, sunshine hours, and humidity — visit our Sparta climate page.
