Climate and monthly weather forecast
Williamstown, IN

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Weather in January

January, like December, in Williamstown, Indiana, is a wintry winter month, with an average temperature varying between 21.9°F (-5.6°C) and 34.7°F (1.5°C). Williamstown's January weather, marked by an average high temperature of 34.7°F (1.5°C) and an average low temperature of 21.9°F (-5.6°C), is the coldest in the year. Weather in January »

Weather in February

The last month of the winter, February, is also a wintry month in Williamstown, Indiana, with temperature in the range of an average high of 39.4°F (4.1°C) and an average low of 25.7°F (-3.5°C). An average high-temperature of a still icy 39.4°F (4.1°C) marks February, exhibiting a close resemblance to the conditions in January. Weather in February »

Weather in March

March, the first month of the spring in Williamstown, is a cool month, with temperature in the range of an average low of 34.9°F (1.6°C) and an average high of 50.5°F (10.3°C). In Williamstown, the onset of March comes with an increased average high-temperature, moving from February's cold 39.4°F (4.1°C) to a cool 50.5°F (10.3°C). Weather in March »

Weather in April

April in Williamstown, Indiana, is a comfortable spring month, with an average temperature varying between 62.2°F (16.8°C) and 45.5°F (7.5°C). Observing a rise in April, the average high-temperature goes from March's fresh 50.5°F (10.3°C) to an enjoyable 62.2°F (16.8°C). Weather in April »

Weather in May

May, the last month of the spring in Williamstown, is a pleasant month, with temperature in the range of an average low of 55.6°F (13.1°C) and an average high of 72.1°F (22.3°C). The rise of average high-temperatures is seen in May, with an increase from an enjoyable 62.2°F (16.8°C) in April to a pleasant 72.1°F (22.3°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Williamstown, Indiana, with temperature in the range of an average low of 62.8°F (17.1°C) and an average high of 79.3°F (26.3°C). June's arrival coincides with a subtle temperature rise, moving from May's pleasant 72.1°F (22.3°C) to a warm 79.3°F (26.3°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Williamstown, Indiana, with an average temperature fluctuating between 82°F (27.8°C) and 64.9°F (18.3°C). July registers as the month with the highest average temperatures, reaching 82°F (27.8°C) at its peak and 64.9°F (18.3°C) at the lowest. July's heat index is computed to be a hot 89.6°F (32°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Williamstown, Indiana, with an average temperature fluctuating between 81.3°F (27.4°C) and 63.1°F (17.3°C). The transition from July to August sees an average high-temperature of a still warm 81.3°F (27.4°C), indicating a minor variance from the prior month. Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Williamstown, Indiana, with an average temperature ranging between min 58.1°F (14.5°C) and max 75.7°F (24.3°C). September's onset brings a negligible change in high-temperatures, falling from a moderately hot 81.3°F (27.4°C) in August to a still warm 75.7°F (24.3°C). Weather in September »

Weather in October

October, the same as September, is another comfortable autumn month in Williamstown, Indiana, with an average temperature varying between 46.9°F (8.3°C) and 63.7°F (17.6°C). With the beginning of October, the average high-temperature shows a decrease, transitioning from a moderately hot 75.7°F (24.3°C) in September to an enjoyable 63.7°F (17.6°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a fresh month in Williamstown, Indiana, with an average temperature fluctuating between 50°F (10°C) and 36.3°F (2.4°C). The transition into November indicates a reduction in the average high-temperature, down to a cool 50°F (10°C) from October's comfortable 63.7°F (17.6°C). Weather in November »

Weather in December

The first month of the winter, December, is also an icy month in Williamstown, Indiana, with temperature in the range of an average high of 40.1°F (4.5°C) and an average low of 29.3°F (-1.5°C). Transition from November to December is accompanied by a temperature drop, with average high-temperatures decreasing from a fresh 50°F (10°C) to a cold 40.1°F (4.5°C). Weather in December »
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Frequently asked questions

What is the coldest month in Williamstown?

Williamstown's January weather, with an average high temperature of 34.7°F (1.5°C) and an average low temperature of 21.9°F (-5.6°C), tends to be the coldest of the year.

What are the most humid months in Williamstown?

The months with the highest humidity in Williamstown, Indiana, are January and December, with an average relative humidity of 82%.

How many days does it rain in Williamstown?

Throughout the year, in Williamstown, Indiana, there are 161.3 rainfall days, and 31.26" (794mm) of precipitation is accumulated.

When does it snow in Williamstown?

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

How many days does it snow in Williamstown?

Throughout the year, in Williamstown, Indiana, there are 35 snowfall days, and 10.67" (271mm) of snow is accumulated.

What is the month with the least sunshine in Williamstown?

With an average of 3.9h of sunshine, January has the least sunshine of the year.

When does it snow the most in Williamstown?

The month with the most snowfall in Williamstown, Indiana, is February, when snow falls for 8.2 days and typically aggregates up to 2.64" (67mm) of snow.

When is Daylight Saving Time (DST) in Williamstown?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.

What is the wettest month in Williamstown?

May is the month with the most rainfall. Rain falls for 19.3 days and accumulates 3.78" (96mm) of precipitation.

When it does not snow in Williamstown?

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

When are the longest days in Williamstown?

With an average of 14h and 54min of daylight, June has the longest days of the year in Williamstown, Indiana.

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 hottest time of year in Williamstown?

In Williamstown, July is identified by the average highest temperatures, reaching a peak of 82°F (27.8°C) and a low of 64.9°F (18.3°C).

What month has the most sunshine in Williamstown?

July has the most sunshine of the year, with an average of 10.1h of sunshine.

What is the driest month in Williamstown?

The month with the least rainfall in Williamstown is September, when the rain falls for 13.7 days and typically collects 1.97" (50mm) of precipitation.

What is the least humid month in Williamstown?

The least humid month in Williamstown is October, with an average relative humidity of 74%.

What is the month with the shortest days in Williamstown?

With an average of 9h and 24min of daylight, December has the shortest days of the year.

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

The month with the lowest UV index in Williamstown is December, with an average maximum UV index of 1.

Average temperature
Williamstown, IN

Average temperature - Williamstown, IN

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (34.7°F).

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).

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Average pressure
Williamstown, IN

Average pressure - Williamstown, IN

The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed
Williamstown, IN

Average wind speed - Williamstown, IN

The windiest month (with the highest average wind speed) is January (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).

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Average humidity
Williamstown, IN

Average humidity - Williamstown, IN

The months with the highest relative humidity are January and December (82%).
The month with the lowest relative humidity is October (74%).

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Average rainfall
Williamstown, IN

Average rainfall - Williamstown, IN

The wettest month (with the highest rainfall) is May (3.78").
The driest month (with the least rainfall) is September (1.97").

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Average rainfall days
Williamstown, IN

Average rainfall days - Williamstown, IN

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is February (8.4 days).

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Average snowfall
Williamstown, IN

Average snowfall - Williamstown, IN

The month with the highest snowfall is February (2.64").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days
Williamstown, IN

Average snowfall days - Williamstown, IN

The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Williamstown, IN

Average daylight / Average sunshine - Williamstown, IN

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

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Average sunshine days
Williamstown, IN

Average sunshine days - Williamstown, IN

The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is May (9.9 days).

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Average visibility
Williamstown, IN

Average visibility - Williamstown, IN

The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).

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Williamstown, Indiana, USA

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