- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On April 30 in NORTHERLY ISLAND the average high temperature is 60.2 °F (15.6 °C). The lowest recored high temperature was 45.1 °F (7.3 °C) in 2017 and the highest recored high temperature was 83.7 °F (28.7 °C) in 2013. The high temperature is usually* between 52.4 °F (11.3 °C) and 67.9 °F (20.0 °C). About a quarter of the time, the high temperature is less than 52.4 °F (11.3 °C), and another quarter of the time, the high temperature is greater than and 67.9 °F (20.0 °C). About 95% of the time, the high temperature has been between 37.6 °F (3.1 °C) and 82.7 °F (28.2 °C).
Low Temperatures
On April 30 in NORTHERLY ISLAND the average low temperature is 44.3 °F (6.9 °C). The lowest recored low temperature was 37.9 °F (3.3 °C) in 2019 and the lowest recored low temperature was 61.3 °F (16.3 °C) in 2013. The low temperature is usually* between 40.2 °F (4.6 °C) and 48.5 °F (9.1 °C). About a quarter of the time, the low temperature is less than 40.2 °F (4.6 °C), and another quarter of the time, the low temperature is greater than and 48.5 °F (9.1 °C). About 95% of the time, the low temperature has been between 32.4 °F (0.2 °C) and 56.3 °F (13.5 °C).
Frost
On April 30 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 2.2% 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