- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On March 11 in NORTHERLY ISLAND the average high temperature is 46.6 °F (8.1 °C). The lowest recored high temperature was 30.9 °F (-0.6 °C) in 2022 and the highest recored high temperature was 66.9 °F (19.4 °C) in 2025. The high temperature is usually* between 39.1 °F (4.0 °C) and 54.1 °F (12.3 °C). About a quarter of the time, the high temperature is less than 39.1 °F (4.0 °C), and another quarter of the time, the high temperature is greater than and 54.1 °F (12.3 °C). About 95% of the time, the high temperature has been between 24.9 °F (-4.0 °C) and 68.3 °F (20.2 °C).
Low Temperatures
On March 11 in NORTHERLY ISLAND the average low temperature is 31.8 °F (-0.1 °C). The lowest recored low temperature was 18.0 °F (-7.8 °C) in 2022 and the lowest recored low temperature was 37.6 °F (3.1 °C) in 2019. The low temperature is usually* between 26.7 °F (-2.9 °C) and 36.9 °F (2.7 °C). About a quarter of the time, the low temperature is less than 26.7 °F (-2.9 °C), and another quarter of the time, the low temperature is greater than and 36.9 °F (2.7 °C). About 95% of the time, the low temperature has been between 17.0 °F (-8.3 °C) and 46.5 °F (8.1 °C).
Frost
On March 11 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 51.2% 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