- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On May 30 in NORTHERLY ISLAND the average high temperature is 74.2 °F (23.4 °C). The lowest recored high temperature was 62.4 °F (16.9 °C) in 2024 and the highest recored high temperature was 86.9 °F (30.5 °C) in 2022. The high temperature is usually* between 69.3 °F (20.7 °C) and 79.1 °F (26.1 °C). About a quarter of the time, the high temperature is less than 69.3 °F (20.7 °C), and another quarter of the time, the high temperature is greater than and 79.1 °F (26.1 °C). About 95% of the time, the high temperature has been between 60.0 °F (15.5 °C) and 88.4 °F (31.3 °C).
Low Temperatures
On May 30 in NORTHERLY ISLAND the average low temperature is 55.9 °F (13.3 °C). The lowest recored low temperature was 46.6 °F (8.1 °C) in 2015 and the lowest recored low temperature was 71.1 °F (21.7 °C) in 2013. The low temperature is usually* between 51.4 °F (10.8 °C) and 60.4 °F (15.8 °C). About a quarter of the time, the low temperature is less than 51.4 °F (10.8 °C), and another quarter of the time, the low temperature is greater than and 60.4 °F (15.8 °C). About 95% of the time, the low temperature has been between 42.8 °F (6.0 °C) and 69.0 °F (20.6 °C).
Frost
On May 30 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