Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On June 23 in NORTHERLY ISLAND the average high temperature is 80.8 °F (27.1 °C). The lowest recored high temperature was 72.1 °F (22.3 °C) in 2014 and the highest recored high temperature was 92.5 °F (33.6 °C) in 2025. The high temperature is usually* between 75.8 °F (24.3 °C) and 85.9 °F (29.9 °C). About a quarter of the time, the high temperature is less than 75.8 °F (24.3 °C), and another quarter of the time, the high temperature is greater than and 85.9 °F (29.9 °C). About 95% of the time, the high temperature has been between 66.3 °F (19.0 °C) and 95.4 °F (35.2 °C).
Low Temperatures
On June 23 in NORTHERLY ISLAND the average low temperature is 65.1 °F (18.4 °C). The lowest recored low temperature was 57.0 °F (13.9 °C) in 2019 and the lowest recored low temperature was 78.6 °F (25.9 °C) in 2025. The low temperature is usually* between 61.4 °F (16.3 °C) and 68.8 °F (20.5 °C). About a quarter of the time, the low temperature is less than 61.4 °F (16.3 °C), and another quarter of the time, the low temperature is greater than and 68.8 °F (20.5 °C). About 95% of the time, the low temperature has been between 54.3 °F (12.4 °C) and 75.9 °F (24.4 °C).
Frost
On June 23 in NORTHERLY ISLAND 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:
- NORTHERLY ISLAND — Integrated Surface Dataset (ISD) station ID: 998499 — from year 2013 to 2025