Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On June 30 in NORTHERLY ISLAND the average high temperature is 80.0 °F (26.7 °C). The lowest recored high temperature was 66.4 °F (19.1 °C) in 2013 and the highest recored high temperature was 89.6 °F (32.0 °C) in 2022. The high temperature is usually* between 75.5 °F (24.2 °C) and 84.6 °F (29.2 °C). About a quarter of the time, the high temperature is less than 75.5 °F (24.2 °C), and another quarter of the time, the high temperature is greater than and 84.6 °F (29.2 °C). About 95% of the time, the high temperature has been between 66.9 °F (19.4 °C) and 93.2 °F (34.0 °C).
Low Temperatures
On June 30 in NORTHERLY ISLAND the average low temperature is 65.0 °F (18.4 °C). The lowest recored low temperature was 61.0 °F (16.1 °C) in 2016 and the lowest recored low temperature was 72.5 °F (22.5 °C) in 2014. The low temperature is usually* between 62.5 °F (16.9 °C) and 67.6 °F (19.8 °C). About a quarter of the time, the low temperature is less than 62.5 °F (16.9 °C), and another quarter of the time, the low temperature is greater than and 67.6 °F (19.8 °C). About 95% of the time, the low temperature has been between 57.6 °F (14.2 °C) and 72.4 °F (22.5 °C).
Frost
On June 30 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