Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On May 8 in NORTHERLY ISLAND the average high temperature is 64.8 °F (18.2 °C). The lowest recored high temperature was 48.9 °F (9.4 °C) in 2017 and the highest recored high temperature was 89.1 °F (31.7 °C) in 2014. The high temperature is usually* between 56.6 °F (13.7 °C) and 73.0 °F (22.8 °C). About a quarter of the time, the high temperature is less than 56.6 °F (13.7 °C), and another quarter of the time, the high temperature is greater than and 73.0 °F (22.8 °C). About 95% of the time, the high temperature has been between 41.0 °F (5.0 °C) and 88.5 °F (31.4 °C).
Low Temperatures
On May 8 in NORTHERLY ISLAND the average low temperature is 45.8 °F (7.7 °C). The lowest recored low temperature was 38.1 °F (3.4 °C) in 2020 and the lowest recored low temperature was 55.0 °F (12.8 °C) in 2024. The low temperature is usually* between 42.1 °F (5.6 °C) and 49.6 °F (9.8 °C). About a quarter of the time, the low temperature is less than 42.1 °F (5.6 °C), and another quarter of the time, the low temperature is greater than and 49.6 °F (9.8 °C). About 95% of the time, the low temperature has been between 35.0 °F (1.7 °C) and 56.6 °F (13.7 °C).
Frost
On May 8 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 0.6% 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