Harvey (IL) Temperatures: Monthly Averages and Year-Round Insights
On this page, we’ll explore Harvey’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
Depending on the time of the year, temperatures range from comfortable to very cold in Harvey. On average, maximum daytime temperatures range from a warm 29°C in July to a very cold 0°C in January. Nighttime temperatures can drop, with averages reaching -8°C in January.
The chart below illustrates the average maximum day and minimum night temperatures in Harvey 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 55 mm of rainfall spread over roughly 11 days. For more information, please visit our Harvey 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
pleasant
moderate
cold
very cold
Harvey Temperatures Compared World Wide
Harvey’s average annual maximum temperature is 15°C. Let’s compare this with some popular tourist destinations:
Athens, Greece, experiences an average annual temperature of 23°C, with hot summers and mild winters typical of a Mediterranean climate.
In contrast, in ReykjavÃk, Iceland, the average annual temperature is significantly lower at 9°C, with mild summers and cold winters.
In Seoul, South Korea, the average annual temperature is 18°C, featuring distinct seasons.
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 Harvey, during the coolest month, January, you will experience 72% humidity, which is considered high. This is accompanied by an average maximum temperature of 0°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.
Temperatures in the Mountains
Although not all regions have mountains, elevated areas exhibit distinct temperature variations.
- Sun Exposure: Sunlit slopes tend to be warmer, while shaded areas remain cooler.
- Altitude Effects: Temperatures drop by approximately 6°C for every 1,000 meters of elevation, creating distinct microclimates.
For more detailed information about Harvey’s weather, including monthly rainfall, sunshine hours, and humidity levels, visit our Harvey climate page.
Current temperature in Harvey (IL)
4 m/s
broken clouds and no rain
4 m/s
overcast and no rain
5 m/s
overcast and rain
