- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On December 15 in NORTHERLY ISLAND the average high temperature is 42.7 °F (6.0 °C). The lowest recored high temperature was 21.9 °F (-5.6 °C) in 2016 and the highest recored high temperature was 62.6 °F (17.0 °C) in 2021. The high temperature is usually* between 34.6 °F (1.5 °C) and 50.8 °F (10.4 °C). About a quarter of the time, the high temperature is less than 34.6 °F (1.5 °C), and another quarter of the time, the high temperature is greater than and 50.8 °F (10.4 °C). About 95% of the time, the high temperature has been between 19.3 °F (-7.1 °C) and 66.1 °F (19.0 °C).
Low Temperatures
On December 15 in NORTHERLY ISLAND the average low temperature is 28.1 °F (-2.2 °C). The lowest recored low temperature was 2.3 °F (-16.5 °C) in 2016 and the lowest recored low temperature was 41.4 °F (5.2 °C) in 2012. The low temperature is usually* between 20.5 °F (-6.4 °C) and 35.6 °F (2.0 °C). About a quarter of the time, the low temperature is less than 20.5 °F (-6.4 °C), and another quarter of the time, the low temperature is greater than and 35.6 °F (2.0 °C). About 95% of the time, the low temperature has been between 6.1 °F (-14.4 °C) and 50.0 °F (10.0 °C).
Frost
On December 15 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 63.7% 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