Climate and monthly weather forecastMarion, IN

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 »