Climate and monthly weather forecastBallwin, MO

The climate of Ballwin

The city of Ballwin, Missouri, USA, is categorized under the Köppen climate classification as Cfa, which stands for Humid subtropical, with no distinct dry season. Positioned in the midwestern section of the United States, Ballwin exhibits diverse weather phenomena that change with the seasons.

Throughout the year, Ballwin experiences significant fluctuations in weather parameters. Average highs range from 38.5°F (3.6°C) in the colder months to 88.2°F (31.2°C) during summer peak, indicating a well-defined seasonal temperature range. Lowest temperatures are observed to swing between 24.6°F (-4.1°C) in colder periods to 69.3°F (20.7°C) in warmer segments. Notably, summer isn't the only season affecting humidity levels. A slight increase to 78% occurs in May, while the values remain comparatively uniform throughout the rest of the year, averaging around 75%.

Rainfalls are a common occurrence across all months, with abundant precipitation that varies from 1.1" (28mm) to 3.03" (77mm). While all months witness wet days, numbers peak in May with 16.3 rainfall reported days. Snowfalls, on the other hand, become evident only in three months: January, March, and December, featuring 1.14" (29mm), 0.47" (12mm), and 1.3" (33mm), respectively. With respect to wind, speeds change mildly throughout the year, generally standing between 5.3mph (8.5km/h) to 8.8mph (14.2km/h) with the maximum wind gust recorded at 13.7mph (22km/h).

The best time to visit Ballwin

Based on the climatological data, ideal times for visits fall between the months of May and September. Days are longer, providing approximately 14.3 hours to 14.8 hours of daylight, coupled with sunshine durations extending over an average of 9.4 hours to 10.4 hours. Temperatures remain comfortable with highs from 75.7°F (24.3°C) to 88.2°F (31.2°C) and lows from 57.4°F (14.1°C) to 69.3°F (20.7°C). Relative humidity ranges from 75% to 78% offering a pleasant atmosphere. Rainfall is scattered across these months, but never exceeding 3.03" (77mm), making weather disruptions minimal.

The worst time to visit Ballwin

Visits during winter, particularly between December and February, can be challenging due to low temperatures. Highs crawl from 38.5°F (3.6°C) to 43°F (6.1°C) and lows drop further from 24.6°F (-4.1°C) to 28°F (-2.2°C). These months also experience lesser daylight, summing up to an average of 10.1 hours to 10.8 hours, with reduced sunshine durations, about 4.6 hours to 4.8 hours per day. In addition, January and December also feature apparent snowfall measures.

Spring weather in Ballwin

March to May mark the spring months in Ballwin. Weather during this period is marked by increasing temperatures, with highs moving from 54.9°F (12.7°C) to 75.7°F (24.3°C) and lows ascending between 38.1°F (3.4°C) to 57.4°F (14.1°C). The number of rainy days also rise, reaching the highest in May at 16.3 days with 3.03" (77mm) rainfall. Humidity peaks to 78% in May.

Summer weather in Ballwin

The summer months, between June and August, exhibit predominantly clear skies and warm temperatures. Highest temperatures shift from 85.3°F (29.6°C) to 88.2°F (31.2°C) while lowest temperatures vary from 66.4°F (19.1°C) to 69.3°F (20.7°C). Average rainfall decreases slightly, ranging from 2.4" (61mm) to 2.68" (68mm). June provides the longest daylight hours, clocking an average of 14.8 hours.

Autumn weather in Ballwin

Autumn in Ballwin goes from September to November. Temperatures start to decrease with highs shifting from 80.1°F (26.7°C) to 53.8°F (12.1°C) and lows standing between 59.9°F (15.5°C) to 37.9°F (3.3°C). Rainfall remains above 1 inch in all months, with September experiencing the lowest of the season at 1.73" (44mm).

Winter weather in Ballwin

Winter in Ballwin, from December through February, is characterized by the lowest temperatures and shortest daylight hours. High temperatures seldom exceed from 38.5°F (3.6°C) to 43°F (6.1°C) and lows range between 24.6°F (-4.1°C) to 28°F (-2.2°C). December and January witness snowfalls of 1.3" (33mm) and 1.14" (29mm) respectively. Daylight hours are restricted to 9.5 hours to 10.8 hours, with sunshine duration at its lowest from 4.6 hours to 4.8 hours.

Weather in January

The year in Ballwin, Missouri starts off with chilly conditions and a temperature ranging from 24.6°F (-4.1°C) to 38.5°F (3.6°C). The winter weather finds residents bracing themselves for the biting cold with moderate levels of snowfall. Weather in January »

Weather in February

The last month of the winter, February, is a chilly month in Ballwin, Missouri, with an average temperature ranging between max 43°F (6.1°C) and min 28°F (-2.2°C). At the onset of February, Ballwin records an average high-temperature of a frosty 43°F (6.1°C), showing little deviation from the preceding month. Weather in February »

Weather in March

March, the first month of the spring in Ballwin, is a fresh month, with an average temperature fluctuating between 54.9°F (12.7°C) and 38.1°F (3.4°C). With the transition into March, Ballwin experiences an increase in average high-temperatures, moving up from a frosty 43°F (6.1°C) in February to a cool 54.9°F (12.7°C). Weather in March »

Weather in April

Ballwin in April sees a consistent rise in temperatures from March, with records spanning from 47.8°F (8.8°C) to 65.8°F (18.8°C). Spring is well and alive, casting long shadows with extended daylight hours and high sunshine hours. Weather in April »

Weather in May

May signals the onset of the warmer season in Ballwin, with the highest temperature jumping to 75.7°F (24.3°C). The warmer weather paints longer, sunnier days, promoting more outdoor activities. This period is very conducive for agricultural activities with minimal disturbances from rainfall. Weather in May »

Weather in June

June ushers in the beginning of the summer season in Ballwin. The city is characterized by hot temperatures, reaching up to 85.3°F (29.6°C). The city comes alive with lush greenery, outdoor festivals, and recreational activities amplified by the long, sunlit days. Weather in June »

Weather in July

July sees the warmest weather in Ballwin with the highest temperature hitting 88.2°F (31.2°C). Despite the high heat, the city continues to buzz both day and night as locals and tourists alike enjoy the lasting daylight hours. Emphasising sun protection becomes essential, taking into consideration the high UV index. Weather in July »

Weather in August

August introduces a slight downturn in temperature, dropping to 86.5°F (30.3°C) from the July high of 88.2°F (31.2°C). The weather remains predominantly warm and humid, common during late summer. Frequent thunderstorms and heavy rainfall events can occasionally interrupt the typical August day. Weather in August »

Weather in September

September in Ballwin sees a distinct drop in temperature from August, ranging between 59.9°F (15.5°C) and 80.1°F (26.7°C). The early signs of autumn are evident as the humidity levels start to drop. The city's landscapes begin their transformation into captivating hues of deep reds, oranges, and yellows. Weather in September »

Weather in October

October continues the temperature descent, recording lows and highs from 48.9°F (9.4°C) to 66.6°F (19.2°C). Autumn is fully underway, presenting mesmerizing fall foliage across the city. The drop in temperature calls for warm attire and layering, especially towards the end of the month. Weather in October »

Weather in November

November ushers in the early stages of winter with colder weather, having temperatures spanning from 37.9°F (3.3°C) to 53.8°F (12.1°C). This is a stark change from the balminess experienced in October. The first frost is not an uncommon sight, reminding residents to prepare for the fast-approaching winter. Weather in November »

Weather in December

Concluding the year, December in Ballwin is hallmarked by the cold winter weather, ranging in temperatures from 30.2°F (-1°C) to 43.3°F (6.3°C). The landscapes become dormant and white with snow, coating the city in a winter wonderland aesthetic. Weather in December »