Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On May 26 in NORTHERLY ISLAND the average high temperature is 73.1 °F (22.8 °C). The lowest recored high temperature was 57.0 °F (13.9 °C) in 2025 and the highest recored high temperature was 84.9 °F (29.4 °C) in 2021. The high temperature is usually* between 66.2 °F (19.0 °C) and 80.1 °F (26.7 °C). About a quarter of the time, the high temperature is less than 66.2 °F (19.0 °C), and another quarter of the time, the high temperature is greater than and 80.1 °F (26.7 °C). About 95% of the time, the high temperature has been between 52.9 °F (11.6 °C) and 93.4 °F (34.1 °C).
Low Temperatures
On May 26 in NORTHERLY ISLAND the average low temperature is 55.5 °F (13.1 °C). The lowest recored low temperature was 47.3 °F (8.5 °C) in 2013 and the lowest recored low temperature was 65.5 °F (18.6 °C) in 2021. The low temperature is usually* between 51.7 °F (11.0 °C) and 59.3 °F (15.2 °C). About a quarter of the time, the low temperature is less than 51.7 °F (11.0 °C), and another quarter of the time, the low temperature is greater than and 59.3 °F (15.2 °C). About 95% of the time, the low temperature has been between 44.5 °F (7.0 °C) and 66.5 °F (19.2 °C).
Frost
On May 26 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