- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On April 25 in NORTHERLY ISLAND the average high temperature is 59.9 °F (15.5 °C). The lowest recored high temperature was 43.3 °F (6.3 °C) in 2020 and the highest recored high temperature was 81.0 °F (27.2 °C) in 2016. The high temperature is usually* between 52.7 °F (11.5 °C) and 67.0 °F (19.4 °C). About a quarter of the time, the high temperature is less than 52.7 °F (11.5 °C), and another quarter of the time, the high temperature is greater than and 67.0 °F (19.4 °C). About 95% of the time, the high temperature has been between 39.2 °F (4.0 °C) and 80.6 °F (27.0 °C).
Low Temperatures
On April 25 in NORTHERLY ISLAND the average low temperature is 41.4 °F (5.2 °C). The lowest recored low temperature was 36.0 °F (2.2 °C) in 2024 and the lowest recored low temperature was 47.3 °F (8.5 °C) in 2022. The low temperature is usually* between 39.0 °F (3.9 °C) and 43.9 °F (6.6 °C). About a quarter of the time, the low temperature is less than 39.0 °F (3.9 °C), and another quarter of the time, the low temperature is greater than and 43.9 °F (6.6 °C). About 95% of the time, the low temperature has been between 34.3 °F (1.3 °C) and 48.6 °F (9.2 °C).
Frost
On April 25 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 0.5% 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