- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On April 27 in NORTHERLY ISLAND the average high temperature is 60.9 °F (16.1 °C). The lowest recored high temperature was 46.9 °F (8.3 °C) in 2016 and the highest recored high temperature was 85.3 °F (29.6 °C) in 2021. The high temperature is usually* between 52.6 °F (11.5 °C) and 69.2 °F (20.7 °C). About a quarter of the time, the high temperature is less than 52.6 °F (11.5 °C), and another quarter of the time, the high temperature is greater than and 69.2 °F (20.7 °C). About 95% of the time, the high temperature has been between 36.8 °F (2.7 °C) and 85.0 °F (29.5 °C).
Low Temperatures
On April 27 in NORTHERLY ISLAND the average low temperature is 42.5 °F (5.8 °C). The lowest recored low temperature was 33.6 °F (0.9 °C) in 2019 and the lowest recored low temperature was 63.9 °F (17.7 °C) in 2021. The low temperature is usually* between 38.4 °F (3.6 °C) and 46.5 °F (8.1 °C). About a quarter of the time, the low temperature is less than 38.4 °F (3.6 °C), and another quarter of the time, the low temperature is greater than and 46.5 °F (8.1 °C). About 95% of the time, the low temperature has been between 30.7 °F (-0.7 °C) and 54.2 °F (12.3 °C).
Frost
On April 27 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 4.0% 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