- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On February 19 in NORTHERLY ISLAND the average high temperature is 40.4 °F (4.6 °C). The lowest recored high temperature was 10.9 °F (-11.7 °C) in 2015 and the highest recored high temperature was 64.9 °F (18.3 °C) in 2017. The high temperature is usually* between 30.2 °F (-1.0 °C) and 50.5 °F (10.3 °C). About a quarter of the time, the high temperature is less than 30.2 °F (-1.0 °C), and another quarter of the time, the high temperature is greater than and 50.5 °F (10.3 °C). About 95% of the time, the high temperature has been between 10.9 °F (-11.7 °C) and 69.8 °F (21.0 °C).
Low Temperatures
On February 19 in NORTHERLY ISLAND the average low temperature is 19.7 °F (-6.8 °C). The lowest recored low temperature was -3.8 °F (-19.9 °C) in 2015 and the lowest recored low temperature was 40.8 °F (4.9 °C) in 2017. The low temperature is usually* between 11.5 °F (-11.4 °C) and 27.9 °F (-2.3 °C). About a quarter of the time, the low temperature is less than 11.5 °F (-11.4 °C), and another quarter of the time, the low temperature is greater than and 27.9 °F (-2.3 °C). About 95% of the time, the low temperature has been between -4.1 °F (-20.1 °C) and 43.5 °F (6.4 °C).
Frost
On February 19 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 84.5% 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