Crystal Lake (IL) Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Crystal Lake, Illinois, United States of America. The numbers reflect climate data gathered over a 30-year period, from 1990 to 2020. Now, let's explore all the details to give you a full picture.

Crystal Lake has a notably wet climate with abundant precipitation, recording 1004 mm (40 in) of rain/snowfall per year.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm (0.01 in))

Crystal Lake can be quite wet during June, receiving approximately 131 mm (5.2 in) of precipitation over 14 rainy days.

In contrast January, experiences much drier conditions, with 41 mm (1.6 in) of snowfall, spread across 9 snowy days.

June, the wettest month, has a maximum daytime temperature of 26°C (79°F). The city receives 311 hours of sunshine in this period. During the driest month January you can expect a temperature of -1°C (30°F). For more detailed insights into the city's temperatures, visit our Crystal Lake Temperature page.

Crystal Lake's average annual precipitation is 1004 mm (40 in). Let's compare this to some popular worldwide tourist destinations:

New York City, USA, receives 1276 mm (50 in) of rainfall annually, with precipitation evenly distributed throughout the year.

Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.

In Tokyo, Japan, the average annual precipitation is 1528 mm (60 in), with significant summer rains due to typhoon season.

Ho Chi Minh City, Vietnam, receives 1955 mm (77 in) of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.

Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.

Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.

• "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
• The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm (15 inches) wide and 20 cm (7.9 inches) thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
• The greatest snowfall recorded was on Mt. Rainier, Washington State, USA, over 31.5 meters (103 feet) fell during the winter of 1972.

For more detailed information about Crystal Lake (IL)'s weather, including sunshine hours, humidity levels, and temperature data, visit our Crystal Lake (IL) Climate page.