- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On September 27 in NORTHERLY ISLAND the average high temperature is 72.9 °F (22.7 °C). The lowest recored high temperature was 61.9 °F (16.6 °C) in 2012 and the highest recored high temperature was 90.0 °F (32.2 °C) in 2017. The high temperature is usually* between 67.9 °F (19.9 °C) and 77.8 °F (25.5 °C). About a quarter of the time, the high temperature is less than 67.9 °F (19.9 °C), and another quarter of the time, the high temperature is greater than and 77.8 °F (25.5 °C). About 95% of the time, the high temperature has been between 58.4 °F (14.7 °C) and 87.3 °F (30.7 °C).
Low Temperatures
On September 27 in NORTHERLY ISLAND the average low temperature is 59.3 °F (15.2 °C). The lowest recored low temperature was 49.5 °F (9.7 °C) in 2022 and the lowest recored low temperature was 63.9 °F (17.7 °C) in 2017. The low temperature is usually* between 56.3 °F (13.5 °C) and 62.3 °F (16.9 °C). About a quarter of the time, the low temperature is less than 56.3 °F (13.5 °C), and another quarter of the time, the low temperature is greater than and 62.3 °F (16.9 °C). About 95% of the time, the low temperature has been between 50.5 °F (10.3 °C) and 68.1 °F (20.1 °C).
Frost
On September 27 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