Saint Peters (MO) Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Saint Peters, Missouri, United States of America. The numbers reflect climate data gathered over a 30-year period, from 1990 to 2020. Now, let's break down all the details for a clearer picture.

Saint Peters has a relatively rain/snowy climate with high precipitation levels, averaging 1136 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 climate in Saint Peters shows significant variation throughout the year. Expect 129 mm (5.1 in) of precipitation during the wettest month May, distributed over 14 rainy days.

In contrast, January offers drier and sunnier days, with around 45 mm (1.8 in) of snow/rainfall over 7 snowy/rainy days.

May, the wettest month, has a maximum daytime temperature of 25°C (77°F). The city receives 269 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 Saint Peters Temperature page.

Saint Peters's average annual precipitation is 1136 mm (45 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.

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

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.

• Mawsynram in India is noted as being the wettest place on earth, with over 11 meters (36 feet) of rain falling every year.
• In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm (0.004 inches) per year, with some years recording virtually no rainfall.
• Nearly 1,650 thunderstorm cells are estimated over the planet at any given time.

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