- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On September 25 in NORTHERLY ISLAND the average high temperature is 73.6 °F (23.1 °C). The lowest recored high temperature was 65.5 °F (18.6 °C) in 2013 and the highest recored high temperature was 81.9 °F (27.7 °C) in 2016. The high temperature is usually* between 69.8 °F (21.0 °C) and 77.5 °F (25.3 °C). About a quarter of the time, the high temperature is less than 69.8 °F (21.0 °C), and another quarter of the time, the high temperature is greater than and 77.5 °F (25.3 °C). About 95% of the time, the high temperature has been between 62.4 °F (16.9 °C) and 84.8 °F (29.4 °C).
Low Temperatures
On September 25 in NORTHERLY ISLAND the average low temperature is 59.0 °F (15.0 °C). The lowest recored low temperature was 52.0 °F (11.1 °C) in 2022 and the lowest recored low temperature was 64.4 °F (18.0 °C) in 2016. The low temperature is usually* between 55.8 °F (13.2 °C) and 62.2 °F (16.8 °C). About a quarter of the time, the low temperature is less than 55.8 °F (13.2 °C), and another quarter of the time, the low temperature is greater than and 62.2 °F (16.8 °C). About 95% of the time, the low temperature has been between 49.6 °F (9.8 °C) and 68.4 °F (20.2 °C).
Frost
On September 25 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 2024