Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On May 23 in NORTHERLY ISLAND the average high temperature is 69.6 °F (20.9 °C). The lowest recored high temperature was 52.0 °F (11.1 °C) in 2025 and the highest recored high temperature was 86.0 °F (30.0 °C) in 2021. The high temperature is usually* between 62.0 °F (16.7 °C) and 77.1 °F (25.1 °C). About a quarter of the time, the high temperature is less than 62.0 °F (16.7 °C), and another quarter of the time, the high temperature is greater than and 77.1 °F (25.1 °C). About 95% of the time, the high temperature has been between 47.6 °F (8.7 °C) and 91.5 °F (33.1 °C).
Low Temperatures
On May 23 in NORTHERLY ISLAND the average low temperature is 51.7 °F (10.9 °C). The lowest recored low temperature was 44.1 °F (6.7 °C) in 2013 and the lowest recored low temperature was 62.2 °F (16.8 °C) in 2024. The low temperature is usually* between 48.3 °F (9.1 °C) and 55.0 °F (12.8 °C). About a quarter of the time, the low temperature is less than 48.3 °F (9.1 °C), and another quarter of the time, the low temperature is greater than and 55.0 °F (12.8 °C). About 95% of the time, the low temperature has been between 42.0 °F (5.5 °C) and 61.4 °F (16.3 °C).
Frost
On May 23 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