Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On July 6 in NORTHERLY ISLAND the average high temperature is 84.6 °F (29.2 °C). The lowest recored high temperature was 76.3 °F (24.6 °C) in 2013 and the highest recored high temperature was 91.9 °F (33.3 °C) in 2025. The high temperature is usually* between 81.3 °F (27.4 °C) and 87.9 °F (31.1 °C). About a quarter of the time, the high temperature is less than 81.3 °F (27.4 °C), and another quarter of the time, the high temperature is greater than and 87.9 °F (31.1 °C). About 95% of the time, the high temperature has been between 74.9 °F (23.9 °C) and 94.3 °F (34.6 °C).
Low Temperatures
On July 6 in NORTHERLY ISLAND the average low temperature is 67.9 °F (20.0 °C). The lowest recored low temperature was 65.1 °F (18.4 °C) in 2014 and the lowest recored low temperature was 73.9 °F (23.3 °C) in 2021. The low temperature is usually* between 65.4 °F (18.5 °C) and 70.5 °F (21.4 °C). About a quarter of the time, the low temperature is less than 65.4 °F (18.5 °C), and another quarter of the time, the low temperature is greater than and 70.5 °F (21.4 °C). About 95% of the time, the low temperature has been between 60.4 °F (15.8 °C) and 75.4 °F (24.1 °C).
Frost
On July 6 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