Climate and monthly weather forecast
Marion, IN

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The climate of Marion

Situated in the North American continent, the climate of Marion, Indiana, is categorized according to the Köppen climate classification as Dfa. This classification designates a Humid Continental climate, with no dry season, and hot summers. Over the course of a year, Marion undergoes considerable weather variations, influenced by the continental-climatic characteristics common for locales at this latitude.

Temperature variations in Marion are broad, from the chilling low of 19.8°F (-6.8°C) in the heart of winter to the balmy high of 81.1°F (27.3°C) during the peak of summer. Alongside this, the tendency of the temperature pattern reveals a consistent rise from the start of the year, hitting the high point during July, and a subsequent decline till the year's end.

Humidity in Marion stays relatively constant across the year with minor fluctuations between 76% to 83%. Coupled with the level of rainfall predominantly ranging from 0.63" (16mm) to 1.69" (43mm), it informs the humid nature of the climate. Noticeable is that peak rainfall occurs in the warmer months of May with 1.69" (43mm). Cloud coverage oscillates moderately over the year, with cloudier conditions prevalent during winter and clearer skies during summer.

Another unique characteristic in Marion's weather is the snowfall. Accumulation of snow, ranging from the notable 1.14" (29mm) in February to minor amounts less than 0.98" (25mm), majorly stops by the end of April, only to start again in November. The number of sunshine hours, on the other hand, progressively increases from 3.5 hours in January to a maximum of 10 hours in the month of July.

The best time to visit Marion

The most enjoyable time for tourists to visit Marion, arguably lies in the months from May to September. During this time, the weather exhibits the least amount of rain (ranging from 1.22" (31mm) in August to 1.5" (38mm) in June) and the highest amount of sunshine (between 9.3 hours to 10 hours in a day). The temperatures register at a comfortable level with highs from 71.2°F (21.8°C) to 81.1°F (27.3°C) and lows swinging between 54.7°F (12.6°C) to 64°F (17.8°C).

The worst time to visit Marion

Evidence suggests that the climatic conditions from November through March might be less desirable for tourists. This period grapples with temperatures dropping as low as 19.8°F (-6.8°C) to 37.2°F (2.9°C) and highs only reaching between 31.5°F (-0.3°C) to 47.8°F (8.8°C). Furthermore, these months also see an increased amount of snowfall from 0.67" (17mm) in November increasing to 1.14" (29mm) by February.

Spring weather in Marion

Spring in Marion is a time of transition, marked by temperatures steadily rising from 37.2°F (2.9°C) in March to 59.9°F (15.5°C) by May. Night-time temperatures also see an incremental rise from 33.3°F (0.7°C) to 54.7°F (12.6°C). Rain becomes a common occurrence during this season, with average rainfall amounts of 1.02" (26mm) in March, extending to 1.69" (43mm) by May. Relative humidity remains steady at an average of 76% to 78%.

Summer weather in Marion

Summer months see the peak temperature, touching the highest point at 81.1°F (27.3°C) in July. Nights are milder with lows between 62.2°F (16.8°C) to 64°F (17.8°C). Humidity levels tend to stay at 79% to 82%, with rainfall slightly declining towards the end of the season with 1.5" (38mm) in June and 1.22" (31mm) by August. These months also mark the most hours of daylight, peaking at 15 hours in June.

Autumn weather in Marion

The autumn months are marked by a general cooling trend, with high temperatures receding from 74.3°F (23.5°C) in September to 48.2°F (9°C) by November. Concurrently, night-time temperatures drop from 56.5°F (13.6°C) to 34.9°F (1.6°C). Rainfall and humidity levels consistently taper through the season, from the 0.75" (19mm) in September to 0.67" (17mm) in November, with humidity levels varying from 79% down to 76%.

Winter weather in Marion

Winter reigns supreme from December to February, with temperatures plummeting to icy lows of 19.8°F (-6.8°C) in January. Daytime temperatures barely exceed 35.6°F (2°C). Notably, December and January witness the highest humidity of the year, at 83%. Snowfall is highest during this period, with about 1.14" (29mm) seen in February. Daylight hours are also the shortest, with 9.3 hours registered in December.

Weather in January

The New Year begins with rather cold conditions in Marion, Indiana. January is characterized by an average high temperature of 31.5°F (-0.3°C) and a low of 19.8°F (-6.8°C), making it one of the chilliest months on the calendar. Weather in January »

Weather in February

Moving into February, the average temperatures in Marion continue to rise slightly. Although it is traditionally known as the snowiest time of the year, February sees only an average of 1.14" (29mm) of snowfall. The drop in snowfall days to 8.4 and rising humidity to 82% make for frosty mornings. Weather in February »

Weather in March

As March arrives in Marion, the most notable change is noticed in the precipitation pattern with rainfall inches jumping up to 1.02. The snow starts to melt away and spring teases the residents with warmer temperatures. While early mornings and evenings can still feel quite cold, afternoons offer a much-needed respite with milder conditions. Weather in March »

Weather in April

In April, Marion begins to shake off the winter chill. Rainfall reaches its peak for the first half of the year at an average of 1.34" (34mm) but the significant fluctuation is in temperatures. Sunnier, longer days become more frequent, though nights can still carry a winter chill. Weather in April »

Weather in May

In May, Marion experiences a significant jump in temperatures, witnessing highs around 71.2°F (21.8°C). The clear indication of the arrival of summer comes with warmer days, longer daylight hours, and the much-awaited departure of any remnants of winter chill. Weather in May »

Weather in June

Landing in the heart of summer, June exhibits the highest humidity of the year at 79%. The warm temperatures encourage outdoor activities and the weather is usually not considered oppressive due to moderate levels of humidity. With almost no snowfall, rain showers are infrequent and the landscape thrives in bright summer sunlight. Weather in June »

Weather in July

The peak of summer heat arrives in July, with the average high reaching the topmost of the year at 81.1°F (27.3°C). It becomes imperative to keep oneself hydrated and protected from sun exposure, especially during afternoon hours. Weather in July »

Weather in August

August, though almost as warm as July, exhibits a marginal dip in temperatures, with maximums of 79.3°F (26.3°C) on average. The days slowly start to become shorter but still carry the warmth of the summer. Late summer thunderstorms can be expected, though they often provide a much-needed respite from the heat. Weather in August »

Weather in September

By the time September rolls around, the fall season starts to make its presence felt in Marion. Residents see lower temperatures dropping down to 56.5°F (13.6°C), which is a reprieve from the summer heat. The first signs of fall foliage begin to appear, adding bursts of color to the landscape. Weather in September »

Weather in October

October introduces Marion to the heart of the fall season. Temperatures continue to decline gracefully, and the first hint of winter chill is sensed in the air. The foliage nears peak colors, providing a vibrant backdrop to the cityscape. Weather in October »

Weather in November

The start of winter is signaled in November by the drop in average high temperatures to 48.2°F (9°C). The city's landscape transitions from the vibrant colors of fall to the bare simplicity of winter. November is a month of tranquility, and falling leaves give way to preparations for the winter months ahead. Weather in November »

Weather in December

Closing the year with frosty days and icy nights, December in Marion, Indiana, presents winter in its full swing. Evidence of winter conditions is clear with an average of 0.87" (22mm) of snowfall. With a relatively high percentage of cloudy days, December is characterized by winter grays and whites. Weather in December »
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Frequently asked questions

What is the coldest time of year in Marion?

Marion records the coldest temperatures in January, averaging a high of 31.5°F (-0.3°C) and a low of 19.8°F (-6.8°C).

What are the most humid months in Marion?

January and December, with an average relative humidity of 83%, are most humid months.

How many days does it rain in Marion?

Throughout the year, there are 123.4 rainfall days, and 12.64" (321mm) of precipitation is accumulated.

When does it snow in Marion?

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

How many days does it snow in Marion?

Throughout the year, there are 32.4 snowfall days, and 4.41" (112mm) of snow is accumulated.

What is the month with the least sunshine in Marion?

The month with the least sunshine in Marion is January, with an average of 3.5h of sunshine.

What is the driest month in Marion?

The month with the least rainfall in Marion, Indiana, is February, when the rain falls for 4.8 days and typically collects 0.63" (16mm) of precipitation.

What is the snowiest month in Marion?

The month with the most snowfall in Marion, Indiana, is February, when snow falls for 8.4 days and typically aggregates up to 1.14" (29mm) of snow.

When is Daylight Saving Time (DST) in Marion?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Marion, 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 Marion?

May is the month with the most rainfall. Rain falls for 16.3 days and accumulates 1.69" (43mm) of precipitation.

When it does not snow in Marion?

In Marion, snow does not fall in May through September.

When are the longest days in Marion?

With an average of 15h and 0min of daylight, June has the longest days of the year in Marion, Indiana.

What are the months with the most sunshine in Marion?

The months with the most sunshine are June and July, with an average of 10h of sunshine.

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

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

What are the warmest months in Marion?

In Marion, July is identified by the average highest temperatures, reaching a peak of 81.1°F (27.3°C) and a low of 64°F (17.8°C).

What is the least humid month in Marion?

The least humid month in Marion, Indiana, is October, with an average relative humidity of 73%.

What is the month with the shortest days in Marion?

The month with the shortest days in Marion is December, with an average of 9h and 18min of daylight.

When is the lowest UV index in Marion?

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

Average temperature
Marion, IN

Average temperature - Marion, IN

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.5°F).

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

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Average pressure
Marion, IN

Average pressure - Marion, IN

The months with the highest atmospheric pressure are January and November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed
Marion, IN

Average wind speed - Marion, IN

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).

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Average humidity
Marion, IN

Average humidity - Marion, IN

The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is October (73%).

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Average rainfall
Marion, IN

Average rainfall - Marion, IN

The wettest month (with the highest rainfall) is May (1.69").
The driest month (with the least rainfall) is February (0.63").

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Average rainfall days
Marion, IN

Average rainfall days - Marion, IN

The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (4.8 days).

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Average snowfall
Marion, IN

Average snowfall - Marion, IN

The month with the highest snowfall is February (1.14").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days
Marion, IN

Average snowfall days - Marion, 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
Marion, IN

Average daylight / Average sunshine - Marion, IN

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

The months with the most sunshine are June and July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).

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Average sunshine days
Marion, IN

Average sunshine days - Marion, IN

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is May (11.6 days).

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Average visibility
Marion, IN

Average visibility - Marion, IN

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

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Marion, Indiana, USA

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