- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On September 29 in NORTHERLY ISLAND the average high temperature is 70.2 °F (21.2 °C). The lowest recored high temperature was 60.1 °F (15.6 °C) in 2022 and the highest recored high temperature was 80.6 °F (27.0 °C) in 2014. The high temperature is usually* between 65.6 °F (18.6 °C) and 74.9 °F (23.8 °C). About a quarter of the time, the high temperature is less than 65.6 °F (18.6 °C), and another quarter of the time, the high temperature is greater than and 74.9 °F (23.8 °C). About 95% of the time, the high temperature has been between 56.7 °F (13.7 °C) and 83.7 °F (28.7 °C).
Low Temperatures
On September 29 in NORTHERLY ISLAND the average low temperature is 57.5 °F (14.1 °C). The lowest recored low temperature was 48.6 °F (9.2 °C) in 2020 and the lowest recored low temperature was 64.9 °F (18.3 °C) in 2024. The low temperature is usually* between 54.2 °F (12.3 °C) and 60.7 °F (16.0 °C). About a quarter of the time, the low temperature is less than 54.2 °F (12.3 °C), and another quarter of the time, the low temperature is greater than and 60.7 °F (16.0 °C). About 95% of the time, the low temperature has been between 48.0 °F (8.9 °C) and 67.0 °F (19.4 °C).
Frost
On September 29 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