Cape Girardeau (MO) Temperature by Month
Cape Girardeau in Missouri, United States of America sees significant seasonal temperature differences, with daytime highs between 6°C (43°F) in January and 32°C (90°F) in July, averaging 20°C (68°F) annually. Explore the full monthly breakdown below.
Cape Girardeau Monthly Temperatures
In Cape Girardeau, temperatures differ significantly between summer and winter months. Nighttime lows reflect this range, dropping from 20°C (68°F) in July to -4°C (25°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Cape Girardeau by month:
The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM.
The chart below shows the average temperature throughout the year:
Temperature: Cape Girardeau 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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Cape Girardeau vs World: Temperature Compared
Cape Girardeau's average annual maximum temperature is 20°C (68°F). To put that in context, here's how it compares to a few well-known destinations:
Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.
Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.
Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.
Melbourne, Australia averages 20°C (68°F) annually — known for unpredictable weather, with four seasons sometimes happening in one day.
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 Cape Girardeau's weather — including monthly rainfall, sunshine hours, and humidity — visit our Cape Girardeau climate page.
