Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On February 1 in NORTHERLY ISLAND the average high temperature is 36.0 °F (2.2 °C). The lowest recored high temperature was 13.5 °F (-10.3 °C) in 2013 and the highest recored high temperature was 50.5 °F (10.3 °C) in 2024. The high temperature is usually* between 28.6 °F (-1.9 °C) and 43.4 °F (6.3 °C). About a quarter of the time, the high temperature is less than 28.6 °F (-1.9 °C), and another quarter of the time, the high temperature is greater than and 43.4 °F (6.3 °C). About 95% of the time, the high temperature has been between 14.6 °F (-9.7 °C) and 57.4 °F (14.1 °C).
Low Temperatures
On February 1 in NORTHERLY ISLAND the average low temperature is 20.4 °F (-6.4 °C). The lowest recored low temperature was -17.0 °F (-27.2 °C) in 2019 and the lowest recored low temperature was 36.7 °F (2.6 °C) in 2024. The low temperature is usually* between 11.3 °F (-11.5 °C) and 29.6 °F (-1.3 °C). About a quarter of the time, the low temperature is less than 11.3 °F (-11.5 °C), and another quarter of the time, the low temperature is greater than and 29.6 °F (-1.3 °C). About 95% of the time, the low temperature has been between -6.2 °F (-21.2 °C) and 47.1 °F (8.4 °C).
Frost
On February 1 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 80.2% 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