- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On July 17 in NORTHERLY ISLAND the average high temperature is 83.0 °F (28.3 °C). The lowest recored high temperature was 70.7 °F (21.5 °C) in 2014 and the highest recored high temperature was 97.2 °F (36.2 °C) in 2012. The high temperature is usually* between 77.4 °F (25.2 °C) and 88.6 °F (31.5 °C). About a quarter of the time, the high temperature is less than 77.4 °F (25.2 °C), and another quarter of the time, the high temperature is greater than and 88.6 °F (31.5 °C). About 95% of the time, the high temperature has been between 66.7 °F (19.3 °C) and 99.3 °F (37.4 °C).
Low Temperatures
On July 17 in NORTHERLY ISLAND the average low temperature is 68.2 °F (20.1 °C). The lowest recored low temperature was 60.3 °F (15.7 °C) in 2014 and the lowest recored low temperature was 82.0 °F (27.8 °C) in 2012. The low temperature is usually* between 64.3 °F (17.9 °C) and 72.1 °F (22.3 °C). About a quarter of the time, the low temperature is less than 64.3 °F (17.9 °C), and another quarter of the time, the low temperature is greater than and 72.1 °F (22.3 °C). About 95% of the time, the low temperature has been between 56.7 °F (13.7 °C) and 79.7 °F (26.5 °C).
Frost
On July 17 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 2025