- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On May 16 in NORTHERLY ISLAND the average high temperature is 71.0 °F (21.7 °C). The lowest recored high temperature was 45.9 °F (7.7 °C) in 2014 and the highest recored high temperature was 87.4 °F (30.8 °C) in 2025. The high temperature is usually* between 63.4 °F (17.4 °C) and 78.6 °F (25.9 °C). About a quarter of the time, the high temperature is less than 63.4 °F (17.4 °C), and another quarter of the time, the high temperature is greater than and 78.6 °F (25.9 °C). About 95% of the time, the high temperature has been between 48.8 °F (9.3 °C) and 93.2 °F (34.0 °C).
Low Temperatures
On May 16 in NORTHERLY ISLAND the average low temperature is 50.7 °F (10.4 °C). The lowest recored low temperature was 38.5 °F (3.6 °C) in 2014 and the lowest recored low temperature was 65.5 °F (18.6 °C) in 2025. The low temperature is usually* between 46.2 °F (7.9 °C) and 55.2 °F (12.9 °C). About a quarter of the time, the low temperature is less than 46.2 °F (7.9 °C), and another quarter of the time, the low temperature is greater than and 55.2 °F (12.9 °C). About 95% of the time, the low temperature has been between 37.7 °F (3.2 °C) and 63.7 °F (17.6 °C).
Frost
On May 16 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