- Country: US
- State: IL
- Latitude: 41.856
- Longitude: -87.609
High Temperatures
On March 19 in NORTHERLY ISLAND the average high temperature is 47.3 °F (8.5 °C). The lowest recored high temperature was 35.4 °F (1.9 °C) in 2013 and the highest recored high temperature was 71.1 °F (21.7 °C) in 2025. The high temperature is usually* between 41.3 °F (5.2 °C) and 53.3 °F (11.8 °C). About a quarter of the time, the high temperature is less than 41.3 °F (5.2 °C), and another quarter of the time, the high temperature is greater than and 53.3 °F (11.8 °C). About 95% of the time, the high temperature has been between 29.8 °F (-1.2 °C) and 64.7 °F (18.2 °C).
Low Temperatures
On March 19 in NORTHERLY ISLAND the average low temperature is 31.0 °F (-0.6 °C). The lowest recored low temperature was 12.9 °F (-10.6 °C) in 2023 and the lowest recored low temperature was 38.1 °F (3.4 °C) in 2025. The low temperature is usually* between 26.4 °F (-3.1 °C) and 35.5 °F (2.0 °C). About a quarter of the time, the low temperature is less than 26.4 °F (-3.1 °C), and another quarter of the time, the low temperature is greater than and 35.5 °F (2.0 °C). About 95% of the time, the low temperature has been between 17.7 °F (-7.9 °C) and 44.2 °F (6.8 °C).
Frost
On March 19 in NORTHERLY ISLAND expect the temperatures to drop below freezing for a risk of frost about 56.1% 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