Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On May 9 in NORTHERLY ISLAND the average high temperature is 64.5 °F (18.1 °C). The lowest recored high temperature was 44.1 °F (6.7 °C) in 2020 and the highest recored high temperature was 86.5 °F (30.3 °C) in 2014. The high temperature is usually* between 56.6 °F (13.7 °C) and 72.4 °F (22.5 °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 72.4 °F (22.5 °C). About 95% of the time, the high temperature has been between 41.5 °F (5.3 °C) and 87.6 °F (30.9 °C).
Low Temperatures
On May 9 in NORTHERLY ISLAND the average low temperature is 45.6 °F (7.6 °C). The lowest recored low temperature was 34.0 °F (1.1 °C) in 2020 and the lowest recored low temperature was 63.3 °F (17.4 °C) in 2014. The low temperature is usually* between 41.6 °F (5.4 °C) and 49.6 °F (9.8 °C). About a quarter of the time, the low temperature is less than 41.6 °F (5.4 °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 34.0 °F (1.1 °C) and 57.2 °F (14.0 °C).
Frost
On May 9 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 1.1% 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