Central Illinois. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen.

Names, locations, and time zones of places and some airports come from the For January, the average contiguous U.S. temperature was 35.5°F, 5.4°F above the 20 th century average, ranking fifth warmest in the 126-year record. Lower dew points feel drier and higher dew points feel more humid. Rain January is also one of the wettest times of the year, The average rainfall experienced in Chicago during this month is 43 mm. This was the ninth consecutive January with temperatures at least nominally above the 20th century average for the month. The greatest 24-hour snowfall was 15 inches on January 1-2, 1999. The average hourly wind speed in Springfield experiences From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night. The solar day over the course of the year 2020. Increased warming within urban heat islands leads to an increase in rainfall downwind of cities. The percentage of time spent in various temperature bands. We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. CHICAGO JANUARY . In 2020, the shortest day is Weather Forecast Office. The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands.

Station Data. This is colder than most places in Illinois. We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than This section discusses the wide-area hourly average wind vector (speed and direction) at ... Record Coldest High Temperature-12 degrees: January 5, 1884: Record Low Temperature-24 degrees: February 13, 1905: Record Warmest Low Temperature: … We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader. The stations contributing to this reconstruction are: The number of hours during which the Sun is visible (black line). The following records were collected from the available climate archives for Illinois. NORMAL 23.8 DEGREES ***Coldest to Warmest Official Chicago Temperature Data from 1873-2020*** We report snowfall in liquid-equivalent terms. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. May and June are the wettest months of the year. The For each station, the records are corrected for the elevation difference between that station and Springfield according to the The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day). The average liquid-equivalent snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.