Saint Charles (IL) Temperatures: Monthly Averages and Year-Round Insights
On this page, we’ll explore Saint Charles’s temperature statistics in detail, including day and night variations and monthly averages. We’ll also compare the annual temperature to other cities in the United States of America.
Monthly Temperature Averages
With significant temperature fluctuations, Saint Charles enjoys distinct seasons year-round. Average maximum daytime temperatures range from a comfortable 29°C in July, the warmest time of the year, to a very cold -1°C during cooler months like January. At night, minimum temperatures typically average around -10°C during these months.
The chart below illustrates the average maximum day and minimum night temperatures in Saint Charles by month:
The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM. During this time the sun's heating effect is the strongest. July, the city’s warmest month receives 319 hours of sunshine.
The chart below shows the average temperature throughout the year:
January, the city’s coldest month, receives about 47 mm of rainfall spread over roughly 10 days. For more information, please visit our Saint Charles Precipitation page.
Annual Temperatures in the United States of America Compared
The map below shows the annual temperature across the United States of America. You can also select the different months in case you are interested in a specific month.
very warm
warm
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moderate
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very cold
Saint Charles Temperatures Compared World Wide
Saint Charles’s average annual maximum temperature is 15°C. Let’s compare this with some popular tourist destinations:
In Barcelona, Spain, the average annual temperature is around 21°C, resulting in warm summers and mild winters throughout the year.
In contrast, in Zermatt, Switzerland, the average annual temperature is significantly lower at 4°C, with mild summers and very cold winters.
The climate in San Francisco, USA, is mild, with an average annual temperature of 19°C and minimal seasonal variation.
In Tokyo, Japan, the average annual temperature is 21°C, expect warmer summers and milder winters than Amsterdam.
How does the temperature feel?
Humidity is an essential factor in how you experience temperature. When a warm period is accompanied by high humidity, it results in a higher perceived temperature. This is especially true when temperatures exceed 25°C, as it can cause greater discomfort.
On the other hand, in cooler months, especially when temperatures dip below 10°C, high humidity can intensify the cold. This makes the air feel much colder than it really is.
In Saint Charles, during the coolest month, January, you will experience 72% humidity, which is considered high. This is accompanied by an average maximum temperature of -1°C. In the warmest month, July, the humidity is 68% combined with an average maximum temperature of 29°C, which creates a high-feel temperature. Explore our detailed page on humidity levels for further details.
How are these Temperatures Measured?
Generally, temperature data depicting climate is usually given over a 30-year average in order to reduce short-term fluctuations and reveal better long-term trends in climate conditions.
This temperature data is taken from land-based thermometers, ocean buoys, ships, and satellites. These measurements are transmitted to weather stations and climate centers around the globe where they are processed, averaged, and analyzed in order to monitor the trends and create climate models.
Effects of Temperature on Weather and Climate
Temperature variations influence precipitation patterns in Amsterdam:
Rainfall: Warm air holds more moisture, leading to heavier rain during warmer months. However, precipitation is generally moderate year-round.
Snow: Occasional snowfall occurs in winter, though it rarely lasts very long.
For more detailed information about Saint Charles’s weather, including monthly rainfall, sunshine hours, and humidity levels, visit our Saint Charles climate page.
Current temperature in Saint Charles (IL)
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