Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On February 27 in NORTHERLY ISLAND the average high temperature is 42.8 °F (6.0 °C). The lowest recored high temperature was 19.0 °F (-7.2 °C) in 2014 and the highest recored high temperature was 70.2 °F (21.2 °C) in 2024. The high temperature is usually* between 32.9 °F (0.5 °C) and 52.7 °F (11.5 °C). About a quarter of the time, the high temperature is less than 32.9 °F (0.5 °C), and another quarter of the time, the high temperature is greater than and 52.7 °F (11.5 °C). About 95% of the time, the high temperature has been between 14.0 °F (-10.0 °C) and 71.6 °F (22.0 °C).
Low Temperatures
On February 27 in NORTHERLY ISLAND the average low temperature is 25.8 °F (-3.4 °C). The lowest recored low temperature was 5.4 °F (-14.8 °C) in 2014 and the lowest recored low temperature was 41.0 °F (5.0 °C) in 2024. The low temperature is usually* between 19.3 °F (-7.1 °C) and 32.4 °F (0.2 °C). About a quarter of the time, the low temperature is less than 19.3 °F (-7.1 °C), and another quarter of the time, the low temperature is greater than and 32.4 °F (0.2 °C). About 95% of the time, the low temperature has been between 6.8 °F (-14.0 °C) and 44.8 °F (7.1 °C).
Frost
On February 27 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 73.8% 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