Station information
- Integrated Surface Dataset (ISD) station ID: 725306
- Weather Bureau Army Navy (WBAN): 14855
- Country: US
- State: IL
- Latitude: 42.083
- Longitude: -87.833
High Temperatures
On September 21 in <NA> the average high temperature is 72.1 °F (22.3 °C). The lowest recored high temperature was 52.0 °F (11.1 °C) in 1983 and the highest recored high temperature was 89.1 °F (31.7 °C) in 1970. The high temperature is usually* between 66.3 °F (19.1 °C) and 78.0 °F (25.6 °C). About a quarter of the time, the high temperature is less than 66.3 °F (19.1 °C), and another quarter of the time, the high temperature is greater than and 78.0 °F (25.6 °C). About 95% of the time, the high temperature has been between 55.1 °F (12.9 °C) and 89.2 °F (31.8 °C).
Low Temperatures
On September 21 in <NA> the average low temperature is 54.9 °F (12.7 °C). The lowest recored low temperature was 39.0 °F (3.9 °C) in 1962 and the lowest recored low temperature was 73.9 °F (23.3 °C) in 1970. The low temperature is usually* between 49.4 °F (9.7 °C) and 60.4 °F (15.8 °C). About a quarter of the time, the low temperature is less than 49.4 °F (9.7 °C), and another quarter of the time, the low temperature is greater than and 60.4 °F (15.8 °C). About 95% of the time, the low temperature has been between 38.8 °F (3.8 °C) and 71.0 °F (21.7 °C).
Frost
On September 21 in <NA> expect the temperatures to drop below freezing for a risk of frost about 0.3% of the time.
Data Source(s)
The data used to compute the average high/low temperatures for this location were taken from the following stations:
- NAVAL AIR STATION — Integrated Surface Dataset (ISD) station ID: 725306 — Weather Bureau Army Navy (WBAN): 14855 — from year 1973 to 1994
-
— Weather Bureau Army Navy (WBAN): 14855 — from year 1945 to 1972