Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On April 1 in NORTHERLY ISLAND the average high temperature is 52.9 °F (11.6 °C). The lowest recored high temperature was 39.0 °F (3.9 °C) in 2022 and the highest recored high temperature was 69.1 °F (20.6 °C) in 2023. The high temperature is usually* between 46.3 °F (7.9 °C) and 59.6 °F (15.3 °C). About a quarter of the time, the high temperature is less than 46.3 °F (7.9 °C), and another quarter of the time, the high temperature is greater than and 59.6 °F (15.3 °C). About 95% of the time, the high temperature has been between 33.6 °F (0.9 °C) and 72.2 °F (22.4 °C).
Low Temperatures
On April 1 in NORTHERLY ISLAND the average low temperature is 34.7 °F (1.5 °C). The lowest recored low temperature was 26.1 °F (-3.3 °C) in 2019 and the lowest recored low temperature was 42.1 °F (5.6 °C) in 2024. The low temperature is usually* between 31.3 °F (-0.4 °C) and 38.2 °F (3.4 °C). About a quarter of the time, the low temperature is less than 31.3 °F (-0.4 °C), and another quarter of the time, the low temperature is greater than and 38.2 °F (3.4 °C). About 95% of the time, the low temperature has been between 24.7 °F (-4.1 °C) and 44.8 °F (7.1 °C).
Frost
On April 1 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 29.7% 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