- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On August 23 in NORTHERLY ISLAND the average high temperature is 81.2 °F (27.4 °C). The lowest recored high temperature was 75.7 °F (24.3 °C) in 2013 and the highest recored high temperature was 89.1 °F (31.7 °C) in 2012. The high temperature is usually* between 77.4 °F (25.2 °C) and 85.0 °F (29.5 °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 85.0 °F (29.5 °C). About 95% of the time, the high temperature has been between 70.2 °F (21.2 °C) and 92.3 °F (33.5 °C).
Low Temperatures
On August 23 in NORTHERLY ISLAND the average low temperature is 66.9 °F (19.4 °C). The lowest recored low temperature was 61.0 °F (16.1 °C) in 2016 and the lowest recored low temperature was 71.1 °F (21.7 °C) in 2020. The low temperature is usually* between 64.3 °F (18.0 °C) and 69.5 °F (20.9 °C). About a quarter of the time, the low temperature is less than 64.3 °F (18.0 °C), and another quarter of the time, the low temperature is greater than and 69.5 °F (20.9 °C). About 95% of the time, the low temperature has been between 59.3 °F (15.2 °C) and 74.5 °F (23.6 °C).
Frost
On August 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 2012 to 2025