Climate and monthly weather forecast
Williamstown, MO

Weather in January

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

Weather in February

February, the last month of the winter in Williamstown, is a wintry month, with an average temperature ranging between min 22.6°F (-5.2°C) and max 36.1°F (2.3°C). In February, the average high-temperature is almost the same as in January - a wintry 36.1°F (2.3°C). Weather in February »

Weather in March

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

Weather in April

April is an enjoyable spring month in Williamstown, Missouri, with an average temperature fluctuating between 44.2°F (6.8°C) and 61.9°F (16.6°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 »

Weather in May

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

Weather in June

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

Weather in July

July, like June, in Williamstown, Missouri, is another warm summer month, with temperature in the range of an average high of 83.3°F (28.5°C) and an average low of 66.6°F (19.2°C). July is the warmest month, with an average high-temperature of 83.3°F (28.5°C) and an average low-temperature of 66.6°F (19.2°C). The average heat index in July is appraised at a tropical 93.2°F (34°C). Weather in July »

Weather in August

August, the last month of the summer in Williamstown, is another warm month, with temperature in the range of an average high of 82.8°F (28.2°C) and an average low of 64°F (17.8°C). In Williamstown, the average high-temperature in August is practically the same as in July - a still warm 82.8°F (28.2°C). Weather in August »

Weather in September

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

Weather in October

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

Weather in November

November, the last month of the autumn in Williamstown, is also a frosty month, with an average temperature ranging between min 34.7°F (1.5°C) and max 49.5°F (9.7°C). In November, 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 »

Weather in December

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

What is the coldest month in Williamstown?

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).

What is the driest month in Williamstown?

January is the month with the least rainfall. Rain falls for 4.8 days and accumulates 1.22" (31mm) of precipitation.

How many days does it rain in Williamstown?

In Williamstown, Missouri, during the entire year, the rain falls for 134.4 days and collects up to 27.44" (697mm) of precipitation.

When does it snow in Williamstown?

Months with snowfall are January through April, October through December.

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.

How many days does it snow in Williamstown?

In Williamstown, during the entire year, snow falls for 24.7 days and aggregates up to 11.69" (297mm) 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?

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

When is Daylight Saving Time (DST) in Williamstown?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Williamstown, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from CDT to CST.

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?

In Williamstown, Missouri, snow does not fall in May through September.

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?

June has the longest days of the year in Williamstown, Missouri, with an average of 14h and 59min of daylight.

When is the highest UV index in Williamstown?

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

What is the warmest month in Williamstown?

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 in Williamstown, Missouri.

What month has the most sunshine in Williamstown?

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

What is the least humid month in Williamstown?

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

What is the month with the shortest days in Williamstown?

With an average of 9h and 22min of daylight, December has the shortest days of the year.

Average temperature
Williamstown, MO

Average temperature - Williamstown, MO

The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (31.6°F).

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

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Average pressure
Williamstown, MO

Average pressure - Williamstown, MO

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed
Williamstown, MO

Average wind speed - Williamstown, MO

The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).

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Average humidity
Williamstown, MO

Average humidity - Williamstown, MO

The months with the highest relative humidity are June and July (81%).
The month with the lowest relative humidity is October (71%).

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Average rainfall
Williamstown, MO

Average rainfall - Williamstown, MO

The wettest month (with the highest rainfall) is May (3.7").
The driest month (with the least rainfall) is January (1.22").

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Average rainfall days
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).

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Average snowfall
Williamstown, MO

Average snowfall - Williamstown, MO

The month with the highest snowfall is January (3.98").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days
Williamstown, MO

Average snowfall days - Williamstown, MO

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

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Average daylight / Average sunshine
Williamstown, MO

Average daylight / Average sunshine - Williamstown, MO

The month with the longest days is June (Average daylight: 14h and 59min).
The month with the shortest days is December (Average daylight: 9h and 22min).

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).

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Average sunshine days
Williamstown, MO

Average sunshine days - Williamstown, MO

The month with the most sunshine days is December (19.5 days).
The month with the least sunshine days is June (10.9 days).

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Average UV index
Williamstown, MO

Average UV index - Williamstown, MO

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average visibility
Williamstown, MO

Average visibility - Williamstown, MO

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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