Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On July 7 in NORTHERLY ISLAND the average high temperature is 84.1 °F (28.9 °C). The lowest recored high temperature was 75.9 °F (24.4 °C) in 2019 and the highest recored high temperature was 90.0 °F (32.2 °C) in 2021. The high temperature is usually* between 80.4 °F (26.9 °C) and 87.8 °F (31.0 °C). About a quarter of the time, the high temperature is less than 80.4 °F (26.9 °C), and another quarter of the time, the high temperature is greater than and 87.8 °F (31.0 °C). About 95% of the time, the high temperature has been between 73.4 °F (23.0 °C) and 94.7 °F (34.9 °C).
Low Temperatures
On July 7 in NORTHERLY ISLAND the average low temperature is 67.3 °F (19.6 °C). The lowest recored low temperature was 57.0 °F (13.9 °C) in 2015 and the lowest recored low temperature was 75.0 °F (23.9 °C) in 2020. The low temperature is usually* between 64.5 °F (18.0 °C) and 70.2 °F (21.2 °C). About a quarter of the time, the low temperature is less than 64.5 °F (18.0 °C), and another quarter of the time, the low temperature is greater than and 70.2 °F (21.2 °C). About 95% of the time, the low temperature has been between 59.0 °F (15.0 °C) and 75.7 °F (24.3 °C).
Frost
On July 7 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