- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On April 12 in NORTHERLY ISLAND the average high temperature is 59.3 °F (15.1 °C). The lowest recored high temperature was 43.2 °F (6.2 °C) in 2016 and the highest recored high temperature was 80.4 °F (26.9 °C) in 2023. The high temperature is usually* between 51.6 °F (10.9 °C) and 66.9 °F (19.4 °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 66.9 °F (19.4 °C). About 95% of the time, the high temperature has been between 37.1 °F (2.8 °C) and 81.4 °F (27.5 °C).
Low Temperatures
On April 12 in NORTHERLY ISLAND the average low temperature is 41.2 °F (5.1 °C). The lowest recored low temperature was 36.9 °F (2.7 °C) in 2016 and the lowest recored low temperature was 55.0 °F (12.8 °C) in 2023. The low temperature is usually* between 37.3 °F (2.9 °C) and 45.0 °F (7.2 °C). About a quarter of the time, the low temperature is less than 37.3 °F (2.9 °C), and another quarter of the time, the low temperature is greater than and 45.0 °F (7.2 °C). About 95% of the time, the low temperature has been between 30.0 °F (-1.1 °C) and 52.3 °F (11.3 °C).
Frost
On April 12 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 5.4% 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