- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On June 26 in NORTHERLY ISLAND the average high temperature is 81.2 °F (27.3 °C). The lowest recored high temperature was 62.8 °F (17.1 °C) in 2014 and the highest recored high temperature was 91.2 °F (32.9 °C) in 2025. The high temperature is usually* between 76.4 °F (24.7 °C) and 85.9 °F (30.0 °C). About a quarter of the time, the high temperature is less than 76.4 °F (24.7 °C), and another quarter of the time, the high temperature is greater than and 85.9 °F (30.0 °C). About 95% of the time, the high temperature has been between 67.4 °F (19.7 °C) and 95.0 °F (35.0 °C).
Low Temperatures
On June 26 in NORTHERLY ISLAND the average low temperature is 64.7 °F (18.2 °C). The lowest recored low temperature was 57.2 °F (14.0 °C) in 2014 and the lowest recored low temperature was 70.0 °F (21.1 °C) in 2024. The low temperature is usually* between 62.1 °F (16.7 °C) and 67.3 °F (19.6 °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 67.3 °F (19.6 °C). About 95% of the time, the low temperature has been between 57.2 °F (14.0 °C) and 72.2 °F (22.3 °C).
Frost
On June 26 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