Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On January 1 in NORTHERLY ISLAND the average high temperature is 35.0 °F (1.7 °C). The lowest recored high temperature was 15.1 °F (-9.4 °C) in 2018 and the highest recored high temperature was 44.8 °F (7.1 °C) in 2023. The high temperature is usually* between 28.2 °F (-2.1 °C) and 41.7 °F (5.4 °C). About a quarter of the time, the high temperature is less than 28.2 °F (-2.1 °C), and another quarter of the time, the high temperature is greater than and 41.7 °F (5.4 °C). About 95% of the time, the high temperature has been between 15.3 °F (-9.3 °C) and 54.6 °F (12.6 °C).
Low Temperatures
On January 1 in NORTHERLY ISLAND the average low temperature is 21.9 °F (-5.6 °C). The lowest recored low temperature was -5.1 °F (-20.6 °C) in 2018 and the lowest recored low temperature was 30.6 °F (-0.8 °C) in 2024. The low temperature is usually* between 15.0 °F (-9.4 °C) and 28.8 °F (-1.8 °C). About a quarter of the time, the low temperature is less than 15.0 °F (-9.4 °C), and another quarter of the time, the low temperature is greater than and 28.8 °F (-1.8 °C). About 95% of the time, the low temperature has been between 2.0 °F (-16.7 °C) and 41.8 °F (5.4 °C).
Frost
On January 1 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 84.0% 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:
- NORTHERLY ISLAND — Integrated Surface Dataset (ISD) station ID: 998499 — from year 2013 to 2025