- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On February 23 in NORTHERLY ISLAND the average high temperature is 42.6 °F (5.9 °C). The lowest recored high temperature was 29.7 °F (-1.3 °C) in 2022 and the highest recored high temperature was 66.0 °F (18.9 °C) in 2017. The high temperature is usually* between 35.7 °F (2.0 °C) and 49.6 °F (9.8 °C). About a quarter of the time, the high temperature is less than 35.7 °F (2.0 °C), and another quarter of the time, the high temperature is greater than and 49.6 °F (9.8 °C). About 95% of the time, the high temperature has been between 22.4 °F (-5.3 °C) and 62.9 °F (17.2 °C).
Low Temperatures
On February 23 in NORTHERLY ISLAND the average low temperature is 26.0 °F (-3.3 °C). The lowest recored low temperature was 1.2 °F (-17.1 °C) in 2015 and the lowest recored low temperature was 37.2 °F (2.9 °C) in 2017. The low temperature is usually* between 19.9 °F (-6.7 °C) and 32.2 °F (0.1 °C). About a quarter of the time, the low temperature is less than 19.9 °F (-6.7 °C), and another quarter of the time, the low temperature is greater than and 32.2 °F (0.1 °C). About 95% of the time, the low temperature has been between 8.2 °F (-13.2 °C) and 43.9 °F (6.6 °C).
Frost
On February 23 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 74.4% 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