Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On July 9 in NORTHERLY ISLAND the average high temperature is 80.3 °F (26.8 °C). The lowest recored high temperature was 66.6 °F (19.2 °C) in 2015 and the highest recored high temperature was 91.4 °F (33.0 °C) in 2020. The high temperature is usually* between 75.2 °F (24.0 °C) and 85.4 °F (29.7 °C). About a quarter of the time, the high temperature is less than 75.2 °F (24.0 °C), and another quarter of the time, the high temperature is greater than and 85.4 °F (29.7 °C). About 95% of the time, the high temperature has been between 65.5 °F (18.6 °C) and 95.1 °F (35.1 °C).
Low Temperatures
On July 9 in NORTHERLY ISLAND the average low temperature is 66.0 °F (18.9 °C). The lowest recored low temperature was 57.0 °F (13.9 °C) in 2015 and the lowest recored low temperature was 73.9 °F (23.3 °C) in 2020. The low temperature is usually* between 63.0 °F (17.2 °C) and 69.0 °F (20.5 °C). About a quarter of the time, the low temperature is less than 63.0 °F (17.2 °C), and another quarter of the time, the low temperature is greater than and 69.0 °F (20.5 °C). About 95% of the time, the low temperature has been between 57.2 °F (14.0 °C) and 74.7 °F (23.7 °C).
Frost
On July 9 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 2013 to 2025