- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On May 19 in NORTHERLY ISLAND the average high temperature is 70.7 °F (21.5 °C). The lowest recored high temperature was 59.0 °F (15.0 °C) in 2020 and the highest recored high temperature was 84.0 °F (28.9 °C) in 2024. The high temperature is usually* between 63.4 °F (17.5 °C) and 78.0 °F (25.5 °C). About a quarter of the time, the high temperature is less than 63.4 °F (17.5 °C), and another quarter of the time, the high temperature is greater than and 78.0 °F (25.5 °C). About 95% of the time, the high temperature has been between 49.6 °F (9.8 °C) and 91.8 °F (33.2 °C).
Low Temperatures
On May 19 in NORTHERLY ISLAND the average low temperature is 50.7 °F (10.4 °C). The lowest recored low temperature was 42.4 °F (5.8 °C) in 2017 and the lowest recored low temperature was 57.9 °F (14.4 °C) in 2024. The low temperature is usually* between 46.3 °F (8.0 °C) and 55.1 °F (12.9 °C). About a quarter of the time, the low temperature is less than 46.3 °F (8.0 °C), and another quarter of the time, the low temperature is greater than and 55.1 °F (12.9 °C). About 95% of the time, the low temperature has been between 38.0 °F (3.3 °C) and 63.5 °F (17.5 °C).
Frost
On May 19 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 0.2% 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