Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On August 29 in NORTHERLY ISLAND the average high temperature is 83.6 °F (28.7 °C). The lowest recored high temperature was 73.9 °F (23.3 °C) in 2015 and the highest recored high temperature was 93.0 °F (33.9 °C) in 2020. The high temperature is usually* between 78.9 °F (26.1 °C) and 88.2 °F (31.2 °C). About a quarter of the time, the high temperature is less than 78.9 °F (26.1 °C), and another quarter of the time, the high temperature is greater than and 88.2 °F (31.2 °C). About 95% of the time, the high temperature has been between 70.1 °F (21.2 °C) and 97.1 °F (36.1 °C).
Low Temperatures
On August 29 in NORTHERLY ISLAND the average low temperature is 68.6 °F (20.3 °C). The lowest recored low temperature was 60.1 °F (15.6 °C) in 2015 and the lowest recored low temperature was 75.9 °F (24.4 °C) in 2021. The low temperature is usually* between 65.5 °F (18.6 °C) and 71.7 °F (22.1 °C). About a quarter of the time, the low temperature is less than 65.5 °F (18.6 °C), and another quarter of the time, the low temperature is greater than and 71.7 °F (22.1 °C). About 95% of the time, the low temperature has been between 59.5 °F (15.3 °C) and 77.7 °F (25.4 °C).
Frost
On August 29 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 2024