- Country: US
- State: IL
- Latitude: 41.717
- Longitude: -87.533
High Temperatures
On September 21 in CALUMET (CGS) the average high temperature is 67.5 °F (19.7 °C). The lowest recored high temperature was 58.8 °F (14.9 °C) in 1987 and the highest recored high temperature was 72.0 °F (22.2 °C) in 1989. The high temperature is usually* between 62.5 °F (17.0 °C) and 72.5 °F (22.5 °C). About a quarter of the time, the high temperature is less than 62.5 °F (17.0 °C), and another quarter of the time, the high temperature is greater than and 72.5 °F (22.5 °C). About 95% of the time, the high temperature has been between 53.0 °F (11.7 °C) and 82.0 °F (27.8 °C).
Low Temperatures
On September 21 in CALUMET (CGS) the average low temperature is 56.3 °F (13.5 °C). The lowest recored low temperature was 48.9 °F (9.4 °C) in 1987 and the lowest recored low temperature was 59.9 °F (15.5 °C) in 1989. The low temperature is usually* between 53.5 °F (12.0 °C) and 59.0 °F (15.0 °C). About a quarter of the time, the low temperature is less than 53.5 °F (12.0 °C), and another quarter of the time, the low temperature is greater than and 59.0 °F (15.0 °C). About 95% of the time, the low temperature has been between 48.4 °F (9.1 °C) and 64.2 °F (17.9 °C).
Frost
On September 21 in CALUMET (CGS) expect the temperatures to drop below freezing for a risk of frost about 0.0% 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:
- CALUMET (CGS) — Integrated Surface Dataset (ISD) station ID: 722418 — from year 1987 to 1989