Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On June 27 in NORTHERLY ISLAND the average high temperature is 82.2 °F (27.9 °C). The lowest recored high temperature was 70.3 °F (21.3 °C) in 2015 and the highest recored high temperature was 91.9 °F (33.3 °C) in 2025. The high temperature is usually* between 77.4 °F (25.2 °C) and 86.9 °F (30.5 °C). About a quarter of the time, the high temperature is less than 77.4 °F (25.2 °C), and another quarter of the time, the high temperature is greater than and 86.9 °F (30.5 °C). About 95% of the time, the high temperature has been between 68.4 °F (20.2 °C) and 95.9 °F (35.5 °C).
Low Temperatures
On June 27 in NORTHERLY ISLAND the average low temperature is 65.2 °F (18.4 °C). The lowest recored low temperature was 58.5 °F (14.7 °C) in 2014 and the lowest recored low temperature was 73.0 °F (22.8 °C) in 2016. The low temperature is usually* between 62.1 °F (16.7 °C) and 68.2 °F (20.1 °C). About a quarter of the time, the low temperature is less than 62.1 °F (16.7 °C), and another quarter of the time, the low temperature is greater than and 68.2 °F (20.1 °C). About 95% of the time, the low temperature has been between 56.2 °F (13.4 °C) and 74.1 °F (23.4 °C).
Frost
On June 27 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 2012 to 2025