- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On May 31 in NORTHERLY ISLAND the average high temperature is 74.0 °F (23.3 °C). The lowest recored high temperature was 63.0 °F (17.2 °C) in 2020 and the highest recored high temperature was 87.1 °F (30.6 °C) in 2022. The high temperature is usually* between 68.1 °F (20.1 °C) and 79.8 °F (26.6 °C). About a quarter of the time, the high temperature is less than 68.1 °F (20.1 °C), and another quarter of the time, the high temperature is greater than and 79.8 °F (26.6 °C). About 95% of the time, the high temperature has been between 57.0 °F (13.9 °C) and 90.9 °F (32.7 °C).
Low Temperatures
On May 31 in NORTHERLY ISLAND the average low temperature is 56.0 °F (13.4 °C). The lowest recored low temperature was 43.0 °F (6.1 °C) in 2015 and the lowest recored low temperature was 71.1 °F (21.7 °C) in 2022. The low temperature is usually* between 51.2 °F (10.7 °C) and 60.9 °F (16.0 °C). About a quarter of the time, the low temperature is less than 51.2 °F (10.7 °C), and another quarter of the time, the low temperature is greater than and 60.9 °F (16.0 °C). About 95% of the time, the low temperature has been between 42.1 °F (5.6 °C) and 70.0 °F (21.1 °C).
Frost
On May 31 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