Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On July 27 in NORTHERLY ISLAND the average high temperature is 81.8 °F (27.7 °C). The lowest recored high temperature was 69.8 °F (21.0 °C) in 2013 and the highest recored high temperature was 90.5 °F (32.5 °C) in 2020. The high temperature is usually* between 77.8 °F (25.4 °C) and 85.9 °F (29.9 °C). About a quarter of the time, the high temperature is less than 77.8 °F (25.4 °C), and another quarter of the time, the high temperature is greater than and 85.9 °F (29.9 °C). About 95% of the time, the high temperature has been between 70.0 °F (21.1 °C) and 93.6 °F (34.2 °C).
Low Temperatures
On July 27 in NORTHERLY ISLAND the average low temperature is 69.2 °F (20.7 °C). The lowest recored low temperature was 61.9 °F (16.6 °C) in 2013 and the lowest recored low temperature was 75.6 °F (24.2 °C) in 2020. The low temperature is usually* between 66.3 °F (19.1 °C) and 72.1 °F (22.3 °C). About a quarter of the time, the low temperature is less than 66.3 °F (19.1 °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 60.9 °F (16.0 °C) and 77.6 °F (25.3 °C).
Frost
On July 27 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