Williamstown
Missouri, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Williamstown, MO

January, the same as December, in Williamstown, Missouri, is another subzero cold winter month, with temperature in the range of an average high of 31.6°F (-0.2°C) and an average low of 18.9°F (-7.3°C). The coldest month is January, with an average high-temperature of 31.6°F (-0.2°C) and an average low-temperature of 18.9°F (-7.3°C). Weather in January »

February, the last month of the winter, in Williamstown, is a wintry month, with average temperature varying between 22.6°F (-5.2°C) and 36.1°F (2.3°C). In Williamstown, Missouri, the average high-temperature in February is relatively the same as in January - a cold 36.1°F (2.3°C). Weather in February »

The first month of the spring, March, is a frosty month in Williamstown, Missouri, with average temperature fluctuating between 49.6°F (9.8°C) and 34.5°F (1.4°C). In March, the average high-temperature rises, from a wintry 36.1°F (2.3°C) in February, to a chilly 49.6°F (9.8°C). Weather in March »

April in Williamstown, Missouri, is a comfortable spring month, with temperature in the range of an average high of 61.9°F (16.6°C) and an average low of 44.2°F (6.8°C). In April, the average high-temperature increases, from a frosty 49.6°F (9.8°C) in March, to an enjoyable 61.9°F (16.6°C). Weather in April »

The last month of the spring, May, is an agreeable month in Williamstown, Missouri, with average temperature varying between 71.2°F (21.8°C) and 54.3°F (12.4°C). In Williamstown, the average high-temperature in May rises, from a comfortable 61.9°F (16.6°C) in April, to an agreeable 71.2°F (21.8°C). Weather in May »

The first month of the summer, June, is a moderately hot month in Williamstown, Missouri, with average temperature fluctuating between 80.8°F (27.1°C) and 63.7°F (17.6°C). In Williamstown, the average high-temperature increases, from a pleasant 71.2°F (21.8°C) in May, to a warm 80.8°F (27.1°C). Weather in June »

July, like June, in Williamstown, Missouri, is another warm summer month, with average temperature ranging between min 66.6°F (19.2°C) and max 83.3°F (28.5°C). With an average high-temperature of 83.3°F (28.5°C) and an average low-temperature of 66.6°F (19.2°C), July is the warmest month. The average heat index in July is estimated at a hot 92.5°F (33.6°C). Weather in July »

The last month of the summer, August, is another warm month in Williamstown, Missouri, with average temperature ranging between min 64°F (17.8°C) and max 82.8°F (28.2°C). In August, the average high-temperature is essentially the same as in July - a still moderately hot 82.8°F (28.2°C). Weather in August »

September, the first month of the autumn, in Williamstown, is also a moderately hot month, with average temperature varying between 77.4°F (25.2°C) and 57.6°F (14.2°C). In September, the average high-temperature slightly decreases, from 82.8°F (28.2°C) in August, to a still warm 77.4°F (25.2°C). Weather in September »

October, the same as September, is another comfortable autumn month in Williamstown, Missouri, with temperature in the range of an average high of 63.3°F (17.4°C) and an average low of 46°F (7.8°C). In Williamstown, the average high-temperature decreases, from a warm 77.4°F (25.2°C) in September, to an enjoyable 63.3°F (17.4°C). Weather in October »

November, the last month of the autumn, in Williamstown, is another chilly month, with average temperature ranging between min 34.7°F (1.5°C) and max 49.5°F (9.7°C). In Williamstown, the average high-temperature decreases, from a comfortable 63.3°F (17.4°C) in October, to a chilly 49.5°F (9.7°C). Weather in November »

December, the first month of the winter, in Williamstown, is also a wintry month, with average temperature ranging between min 25.7°F (-3.5°C) and max 37.6°F (3.1°C). In December, the average high-temperature decreases, from a chilly 49.5°F (9.7°C) in November, to a wintry 37.6°F (3.1°C). Weather in December »

What is the coldest month in Williamstown?

January is the coldest month in Williamstown, Missouri, with an average high-temperature of 31.6°F (-0.2°C) and an average low-temperature of 18.9°F (-7.3°C).

How many days does it rain in Williamstown?

Throughout the year, there are 134.4 rainfall days, and 27.44" (697mm) of precipitation is accumulated.

What is the driest month in Williamstown?

The month with the least rainfall in Williamstown is January when the rain falls for 4.8 days and typically collects 1.22" (31mm) of precipitation.

When does it snow in Williamstown?

January through April, October through December are months with snowfall in Williamstown.

How much does it snow in Williamstown?

Throughout the year, in Williamstown, there are 24.7 snowfall days, and 11.69" (297mm) of snow is accumulated.

What is the snowiest month in Williamstown?

The month with the most snowfall in Williamstown is January when snow falls for 7.4 days and typically aggregates up to 3.98" (101mm) of snow.

What is the month with the least sunshine in Williamstown?

The month with the least sunshine in Williamstown, Missouri, is January, with an average of 4.3h of sunshine.

What are the months with the lowest UV index in Williamstown?

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

What is the wettest month in Williamstown?

The month with the most rainfall in Williamstown is May when the rain falls for 17.6 days and typically aggregates up to 3.7" (94mm) of precipitation.

When it does not snow in Williamstown?

May through September are months without snowfall in Williamstown, Missouri.

What are the most humid months in Williamstown?

June and July, with an average relative humidity of 81%, are most humid months in Williamstown, Missouri.

When are the longest days in Williamstown?

With an average of 15h of daylight, June has the longest days of the year.

What is the month with the highest UV index in Williamstown?

Months with the highest UV index in Williamstown are June through August, with an average maximum UV index of 6.

What is the warmest month in Williamstown?

The warmest month is July, with an average high-temperature of 83.3°F (28.5°C) and an average low-temperature of 66.6°F (19.2°C).

What month has the most sunshine in Williamstown?

With an average of 10.4h of sunshine, July has the most sunshine of the year in Williamstown, Missouri.

What is the least humid month in Williamstown?

October is the least humid month in Williamstown, Missouri, with an average relative humidity of 71%.

What is the month with the shortest days in Williamstown?

With an average of 9.4h of daylight, December has the shortest days of the year.
Average temperature - Williamstown, MO
Average humidity - Williamstown, MO
Average rainfall - Williamstown, MO
Average rainfall days - Williamstown, MO

The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (4.7 days).

Average snowfall - Williamstown, MO
Average snowfall days - Williamstown, MO

The month with the highest number of snowfall days is January (7.4 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight / Average sunshine - Williamstown, MO

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.4h).

The month with the most sunshine is July (Average sunshine: 10.4h).
The month with the least sunshine is January (Average sunshine: 4.3h).

Average UV index - Williamstown, MO