Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On April 9 in NORTHERLY ISLAND the average high temperature is 55.9 °F (13.3 °C). The lowest recored high temperature was 36.0 °F (2.2 °C) in 2018 and the highest recored high temperature was 74.5 °F (23.6 °C) in 2017. The high temperature is usually* between 46.9 °F (8.3 °C) and 64.9 °F (18.3 °C). About a quarter of the time, the high temperature is less than 46.9 °F (8.3 °C), and another quarter of the time, the high temperature is greater than and 64.9 °F (18.3 °C). About 95% of the time, the high temperature has been between 29.9 °F (-1.2 °C) and 82.0 °F (27.8 °C).
Low Temperatures
On April 9 in NORTHERLY ISLAND the average low temperature is 38.2 °F (3.4 °C). The lowest recored low temperature was 24.8 °F (-4.0 °C) in 2016 and the lowest recored low temperature was 48.7 °F (9.3 °C) in 2019. The low temperature is usually* between 33.0 °F (0.5 °C) and 43.4 °F (6.3 °C). About a quarter of the time, the low temperature is less than 33.0 °F (0.5 °C), and another quarter of the time, the low temperature is greater than and 43.4 °F (6.3 °C). About 95% of the time, the low temperature has been between 23.1 °F (-5.0 °C) and 53.3 °F (11.9 °C).
Frost
On April 9 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 21.1% 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