- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On March 31 in NORTHERLY ISLAND the average high temperature is 54.2 °F (12.3 °C). The lowest recored high temperature was 42.1 °F (5.6 °C) in 2017 and the highest recored high temperature was 66.6 °F (19.2 °C) in 2023. The high temperature is usually* between 47.6 °F (8.7 °C) and 60.7 °F (15.9 °C). About a quarter of the time, the high temperature is less than 47.6 °F (8.7 °C), and another quarter of the time, the high temperature is greater than and 60.7 °F (15.9 °C). About 95% of the time, the high temperature has been between 35.2 °F (1.8 °C) and 73.1 °F (22.9 °C).
Low Temperatures
On March 31 in NORTHERLY ISLAND the average low temperature is 34.9 °F (1.6 °C). The lowest recored low temperature was 25.5 °F (-3.6 °C) in 2019 and the lowest recored low temperature was 44.8 °F (7.1 °C) in 2014. The low temperature is usually* between 31.6 °F (-0.2 °C) and 38.3 °F (3.5 °C). About a quarter of the time, the low temperature is less than 31.6 °F (-0.2 °C), and another quarter of the time, the low temperature is greater than and 38.3 °F (3.5 °C). About 95% of the time, the low temperature has been between 25.2 °F (-3.8 °C) and 44.6 °F (7.0 °C).
Frost
On March 31 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 27.6% 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