Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On May 11 in NORTHERLY ISLAND the average high temperature is 64.4 °F (18.0 °C). The lowest recored high temperature was 48.6 °F (9.2 °C) in 2021 and the highest recored high temperature was 87.1 °F (30.6 °C) in 2022. The high temperature is usually* between 56.9 °F (13.8 °C) and 72.0 °F (22.2 °C). About a quarter of the time, the high temperature is less than 56.9 °F (13.8 °C), and another quarter of the time, the high temperature is greater than and 72.0 °F (22.2 °C). About 95% of the time, the high temperature has been between 42.6 °F (5.9 °C) and 86.3 °F (30.2 °C).
Low Temperatures
On May 11 in NORTHERLY ISLAND the average low temperature is 47.1 °F (8.4 °C). The lowest recored low temperature was 42.1 °F (5.6 °C) in 2019 and the lowest recored low temperature was 61.0 °F (16.1 °C) in 2022. The low temperature is usually* between 43.4 °F (6.3 °C) and 50.8 °F (10.5 °C). About a quarter of the time, the low temperature is less than 43.4 °F (6.3 °C), and another quarter of the time, the low temperature is greater than and 50.8 °F (10.5 °C). About 95% of the time, the low temperature has been between 36.4 °F (2.4 °C) and 57.9 °F (14.4 °C).
Frost
On May 11 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 0.3% 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