- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On April 28 in NORTHERLY ISLAND the average high temperature is 60.1 °F (15.6 °C). The lowest recored high temperature was 46.0 °F (7.8 °C) in 2019 and the highest recored high temperature was 81.1 °F (27.3 °C) in 2025. The high temperature is usually* between 51.6 °F (10.9 °C) and 68.7 °F (20.4 °C). About a quarter of the time, the high temperature is less than 51.6 °F (10.9 °C), and another quarter of the time, the high temperature is greater than and 68.7 °F (20.4 °C). About 95% of the time, the high temperature has been between 35.2 °F (1.8 °C) and 85.1 °F (29.5 °C).
Low Temperatures
On April 28 in NORTHERLY ISLAND the average low temperature is 43.1 °F (6.2 °C). The lowest recored low temperature was 33.1 °F (0.6 °C) in 2019 and the lowest recored low temperature was 54.0 °F (12.2 °C) in 2024. The low temperature is usually* between 38.9 °F (3.9 °C) and 47.3 °F (8.5 °C). About a quarter of the time, the low temperature is less than 38.9 °F (3.9 °C), and another quarter of the time, the low temperature is greater than and 47.3 °F (8.5 °C). About 95% of the time, the low temperature has been between 30.9 °F (-0.6 °C) and 55.3 °F (13.0 °C).
Frost
On April 28 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 3.7% 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