Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On October 15 in NORTHERLY ISLAND the average high temperature is 62.8 °F (17.1 °C). The lowest recored high temperature was 52.9 °F (11.6 °C) in 2012 and the highest recored high temperature was 70.0 °F (21.1 °C) in 2021. The high temperature is usually* between 58.8 °F (14.9 °C) and 66.8 °F (19.3 °C). About a quarter of the time, the high temperature is less than 58.8 °F (14.9 °C), and another quarter of the time, the high temperature is greater than and 66.8 °F (19.3 °C). About 95% of the time, the high temperature has been between 51.2 °F (10.7 °C) and 74.4 °F (23.6 °C).
Low Temperatures
On October 15 in NORTHERLY ISLAND the average low temperature is 48.0 °F (8.9 °C). The lowest recored low temperature was 38.1 °F (3.4 °C) in 2022 and the lowest recored low temperature was 57.9 °F (14.4 °C) in 2021. The low temperature is usually* between 44.0 °F (6.7 °C) and 52.0 °F (11.1 °C). About a quarter of the time, the low temperature is less than 44.0 °F (6.7 °C), and another quarter of the time, the low temperature is greater than and 52.0 °F (11.1 °C). About 95% of the time, the low temperature has been between 36.4 °F (2.4 °C) and 59.6 °F (15.3 °C).
Frost
On October 15 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 0.4% 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