Jefferson City (MO) Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Jefferson City, Missouri, United States of America. Long-term data from 1990 to 2020 was used to calculate these averages. Let's explore the details to provide you with a complete overview.

Jefferson City has a relatively rain/snowy climate with high precipitation levels, averaging 1143 mm (45 in) of rain/snowfall annually.

Monthly Precipitation Levels

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

The seasons in Jefferson City, bring significant changes in precipitation. The wettest month, April, receives high rainfall, with an average of 139 mm (5.5 in) of precipitation. This rainfall is distributed across 13 rainy days.

In contrast, the driest month, January, experiences much less snow/rainfall, totaling 40 mm (1.6 in) over 7 snowy/rainy days. These distinct seasonal differences provide diverse experiences throughout the year.

April, the wettest month, has a maximum daytime temperature of 20°C (68°F). The city receives 229 hours of sunshine in this period. During the driest month January you can expect a temperature of 5°C (41°F). For more detailed insights into the city's temperatures, visit our Jefferson City Temperature page.

Jefferson City's average annual precipitation is 1143 mm (45 in). Let's compare this to some popular worldwide tourist destinations:

Seville, Spain, experiences 541 mm (21 in) of rainfall annually, with wet winters and dry summers typical of southern Spain.

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

Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.

Singapore, situated near the equator, gets 2581 mm (102 in) of rainfall annually, with no distinct dry season and consistent monthly precipitation.

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.

Precipitation has a very strong role in determining the local climate and ecosystem:

• Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
• Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.

• "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 Jefferson City (MO)'s weather, including sunshine hours, humidity levels, and temperature data, visit our Jefferson City (MO) Climate page.