Station information
- Integrated Surface Dataset (ISD) station ID: 998499
- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On February 29 in NORTHERLY ISLAND the average high temperature is 46.7 °F (8.1 °C). The lowest recored high temperature was 36.0 °F (2.2 °C) in 2020 and the highest recored high temperature was 58.5 °F (14.7 °C) in 2016. The high temperature is usually* between 38.0 °F (3.3 °C) and 55.3 °F (13.0 °C). About a quarter of the time, the high temperature is less than 38.0 °F (3.3 °C), and another quarter of the time, the high temperature is greater than and 55.3 °F (13.0 °C). About 95% of the time, the high temperature has been between 21.5 °F (-5.8 °C) and 71.8 °F (22.1 °C).
Low Temperatures
On February 29 in NORTHERLY ISLAND the average low temperature is 25.2 °F (-3.8 °C). The lowest recored low temperature was 19.4 °F (-7.0 °C) in 2020 and the lowest recored low temperature was 34.2 °F (1.2 °C) in 2016. The low temperature is usually* between 18.8 °F (-7.3 °C) and 31.6 °F (-0.2 °C). About a quarter of the time, the low temperature is less than 18.8 °F (-7.3 °C), and another quarter of the time, the low temperature is greater than and 31.6 °F (-0.2 °C). About 95% of the time, the low temperature has been between 6.6 °F (-14.1 °C) and 43.7 °F (6.5 °C).
Frost
On February 29 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 76.4% 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 2016 to 2024