- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On April 19 in NORTHERLY ISLAND the average high temperature is 59.9 °F (15.5 °C). The lowest recored high temperature was 41.5 °F (5.3 °C) in 2022 and the highest recored high temperature was 75.9 °F (24.4 °C) in 2017. The high temperature is usually* between 52.5 °F (11.4 °C) and 67.3 °F (19.6 °C). About a quarter of the time, the high temperature is less than 52.5 °F (11.4 °C), and another quarter of the time, the high temperature is greater than and 67.3 °F (19.6 °C). About 95% of the time, the high temperature has been between 38.3 °F (3.5 °C) and 81.5 °F (27.5 °C).
Low Temperatures
On April 19 in NORTHERLY ISLAND the average low temperature is 39.6 °F (4.2 °C). The lowest recored low temperature was 33.1 °F (0.6 °C) in 2018 and the lowest recored low temperature was 44.4 °F (6.9 °C) in 2024. The low temperature is usually* between 36.3 °F (2.4 °C) and 42.9 °F (6.1 °C). About a quarter of the time, the low temperature is less than 36.3 °F (2.4 °C), and another quarter of the time, the low temperature is greater than and 42.9 °F (6.1 °C). About 95% of the time, the low temperature has been between 30.0 °F (-1.1 °C) and 49.2 °F (9.5 °C).
Frost
On April 19 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 6.0% 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