Custer (SD) Temperature by Month
Custer in South Dakota, United States of America sees significant seasonal temperature differences, with daytime highs between 2°C (36°F) in February and 27°C (81°F) in July, averaging 13°C (55°F) annually. Explore the full monthly breakdown below.
Custer Monthly Temperatures
Depending on the time of the year, temperatures range from warm to very cold in Custer. Nighttime lows follow the same pattern, ranging from 12°C (54°F) to -10°C (14°F).
The chart below illustrates the average maximum day and minimum night temperatures in Custer by month:
Low temperatures are most often recorded between 4 AM and 6 AM, while highs typically occur around 3 PM.
The chart below shows the average temperature throughout the year:
Temperature: Custer 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
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very cold
Custer vs World: Temperature Compared
Custer'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:
Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.
On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.
Seoul, South Korea averages 18°C (64°F) a year, with four clear seasons, cold winters, and hot humid 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 Custer this rarely lasts long on the ground.
For more on Custer's weather — including monthly rainfall, sunshine hours, and humidity — visit our Custer climate page.
