It ranges from 55 mm (2.2 in) in the driest month (February) to 120 mm (4.7 in) in the wettest ones (April, May). Activity Planner Experimental Graphical Hazardous Weather Outlook, Office Tours and School Education Materials, National Oceanic and Atmospheric Administration. On average st louis yearly average rainfall there are 106 days per year with more than 0.1 mm (0.004 in) of rainfall (precipitation) or 8.8 days with a quantity of rain, sleet, snow etc. Boston, MA warning 49 F Rain. If 4.7% of the time, the annual precipitation is more than 40 inches, what is the standard deviation for annual precipitation in St. Louis? The US average is 28 inches of snow per year. Read More >. Data Updated Feb 1. Although fall has almost as much rain as spring (starting at 3.72 inches in September and increasing each month), there are many clear days with blue skies, making it an ideal time to visit. St By the end of the month, average highs will be in the mid-80s. Climate There are usually 10 days with some rain in St Louis in May and the average monthly rainfall is 103mm. CURRENT HAZARDS WebClimate in St. Louis city, Missouri. Marine Weather Due to its flat, inland location, St. Louis receives its fair share of extreme weather, including summertime highs, wintertime lows, tornadoes, and flooding although the latter rarely affects visitors. rainfall Until, one day changed that. Schiller Park, IL (60176) warning 43 F Mostly Cloudy. The three winter months are the driest, with an average total of about 6 inches of precipitation. 75% of the state, by this date, was in drought conditions with at least 35% in extreme drought, most noticeably in the southern part of the states. We exceeded that average high 18 times this month. St. Louis gets an average of 16 inches of snow a year, although this varies from year to year. rainfall Saint Louis, Missouri is dished out on average 900 mm (35.4 in) of rainfall per year, or 75 mm (3 in) per month. If 4.7% of the time, the annual precipitation is more than 40 inches, what is the standard deviation for annual precipitation in St. Louis?
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