Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On December 20 in NORTHERLY ISLAND the average high temperature is 39.1 °F (3.9 °C). The lowest recored high temperature was 29.5 °F (-1.4 °C) in 2016 and the highest recored high temperature was 50.0 °F (10.0 °C) in 2017. The high temperature is usually* between 34.2 °F (1.2 °C) and 44.0 °F (6.6 °C). About a quarter of the time, the high temperature is less than 34.2 °F (1.2 °C), and another quarter of the time, the high temperature is greater than and 44.0 °F (6.6 °C). About 95% of the time, the high temperature has been between 24.8 °F (-4.0 °C) and 53.3 °F (11.8 °C).
Low Temperatures
On December 20 in NORTHERLY ISLAND the average low temperature is 24.5 °F (-4.2 °C). The lowest recored low temperature was -4.0 °F (-20.0 °C) in 2016 and the lowest recored low temperature was 39.6 °F (4.2 °C) in 2012. The low temperature is usually* between 17.8 °F (-7.9 °C) and 31.2 °F (-0.4 °C). About a quarter of the time, the low temperature is less than 17.8 °F (-7.9 °C), and another quarter of the time, the low temperature is greater than and 31.2 °F (-0.4 °C). About 95% of the time, the low temperature has been between 5.1 °F (-15.0 °C) and 44.0 °F (6.6 °C).
Frost
On December 20 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 77.5% 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:
- NORTHERLY ISLAND — Integrated Surface Dataset (ISD) station ID: 998499 — from year 2012 to 2024