- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On May 12 in NORTHERLY ISLAND the average high temperature is 64.9 °F (18.3 °C). The lowest recored high temperature was 50.0 °F (10.0 °C) in 2019 and the highest recored high temperature was 83.3 °F (28.5 °C) in 2014. The high temperature is usually* between 56.7 °F (13.7 °C) and 73.0 °F (22.8 °C). About a quarter of the time, the high temperature is less than 56.7 °F (13.7 °C), and another quarter of the time, the high temperature is greater than and 73.0 °F (22.8 °C). About 95% of the time, the high temperature has been between 41.2 °F (5.1 °C) and 88.6 °F (31.4 °C).
Low Temperatures
On May 12 in NORTHERLY ISLAND the average low temperature is 48.2 °F (9.0 °C). The lowest recored low temperature was 42.1 °F (5.6 °C) in 2013 and the lowest recored low temperature was 58.1 °F (14.5 °C) in 2014. The low temperature is usually* between 44.2 °F (6.8 °C) and 52.2 °F (11.2 °C). About a quarter of the time, the low temperature is less than 44.2 °F (6.8 °C), and another quarter of the time, the low temperature is greater than and 52.2 °F (11.2 °C). About 95% of the time, the low temperature has been between 36.6 °F (2.6 °C) and 59.8 °F (15.4 °C).
Frost
On May 12 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 0.3% 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