Sullivan (MO) Temperature by Month
Sullivan in Missouri, United States of America sees significant seasonal temperature differences, with daytime highs between 6°C (43°F) in January and 31°C (88°F) in July, averaging 19°C (66°F) annually. Explore the full monthly breakdown below.
Sullivan Monthly Temperatures
Depending on the time of the year, temperatures range from very warm to cold in Sullivan. Nighttime lows follow the same pattern, ranging from 19°C (66°F) to -6°C (21°F).
The chart below illustrates the average maximum day and minimum night temperatures in Sullivan by month:
Temperatures tend to bottom out between 4 AM and 6 AM, then climb to their daily peak around 3 PM.
The chart below shows the average temperature throughout the year:
Temperature: Sullivan 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.
very warm
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moderate
cold
very cold
Sullivan vs World: Temperature Compared
Sullivan's average annual maximum temperature is 19°C (66°F). To put that in context, here's how it compares to a few well-known destinations:
Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.
Glasgow, Scotland averages 13°C (55°F) a year — mild but often grey, with cold winters and rarely hot summers.
New York City, USA averages 17°C (63°F) a year, with hot humid summers and cold winters that bring regular snowfall.
Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.
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.
Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round — large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.
For more on Sullivan's weather — including monthly rainfall, sunshine hours, and humidity — visit our Sullivan climate page.
