Climate and monthly weather forecast
Gary, IN

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A large, historic building used as an administration block in Gary, Indiana
A large, historic building used as an administration block in Gary, Indiana

The climate of Gary

Typically, Gary, Indiana fits into the Dfa zone according to the Köppen climate classification, characterizing it as having a humid continental climate with no dry season and hot summers. Geographic positioning pins Gary within the Midwestern United States, which is susceptible to a wide variety of weather occurrences due to the region's large seasonal temperature variations.

Throughout the year, the city experiences significant swings in temperature, reaching its peak in July with highs of 79.3°F (26.3°C) tumbling to a chilling low of 19.8°F (-6.8°C) in January. A moving pattern of relative humidity arises, ranging from 74% to as high as 82%. Unsurprisingly, the winter months witness the highest humidity levels.

With regard to rainfall, the incorporation of the data illustrates an escalation from January through to June, peaking around the latter part of spring with a maximum amount of 3.66" (93mm). The volume then delicately tapers off through until December. A count of rainfall days picks up from January, arriving at a pinnacle in July and then slowly diminishes, signifying a mirrored pattern to the rainfall volume. Interestingly, the occurrence of snowfall is largely restricted from December to March, with no incidence from May through to November.

The Best Time to Visit Gary

Heritage attractions, natural parks or the myriad of events hosted in the city throughout the year sum up some of the reasons for visiting Gary, Indiana. If prioritizing pleasurable warmth and abundant sunshine, then June to August promise the optimal period of visitation. Average temperature ranges between 74.7°F (23.7°C) to 60.6°F (15.9°C) during this period with an average of 78.4°F (25.8°C) in August. The city receives nearly 10.3 hours of sunshine per day during these months, projecting a bright and sunny atmosphere for outdoors activities.

The Worst Time to Visit Gary

Adverse winter conditions from December to February could hinder the travel experience to Gary, Indiana. These months host the lowest temperatures, with January’s low averaging 19.8°F (-6.8°C), while high temperatures only get up to between 30°F (-1.1°C) and 36.1°F (2.3°C). Snowfall during these months reaches between 1.93" (49mm) to 3.11" (79mm), further intensifying the chills. Limited sunlight also could be a deterrent, falling as low as 4 hours per day in December.

Spring Weather in Gary

Spring illustrates a thawing from the chilling winter with temperatures ascending from 43.7°F (6.5°C) in March to 64.9°F (18.3°C) by May. Rainfall showers down quite substantially during this season, intensifying from 1.3" (33mm) to 3.35" (85mm) from March to May. Consequently, the number of rainfall days shoots up to its peak at 17.4 by May. Although moderate snowfall prevails in March, by April, it diminishes to less than an inch, ultimately disappearing in May.

Summer Weather in Gary

The summer months in Gary, June through August, experience a surge in temperature peaking at 79.3°F (26.3°C) in July. Daily sunshine hours also reach a zenith during this season, escalating to 10.5 hours in August. There is a slight dip in humidity from 79% to 78%, ensuring relatively comfortable conditions despite the increase in temperature. Rainfall continues at a high with an average of between 3.15" (80mm) and 2.8" (71mm).

Autumn Weather in Gary

Autumn in Gary, September to November, witnesses a gradual cooldown, with temperatures descending from 72.9°F (22.7°C) in September to a low of 46.6°F (8.1°C) by November. Days become shorter, sunlight reduces to 5.1 hours per day, and the number of rainfall days reduces, concluding the season with a minimal 9.6 days of rainfall in November.

Winter Weather in Gary

Winter in Gary, from December to February, is characterized by low temperatures, the coldest being in January with average lows of 19.8°F (-6.8°C). Snow makes its presence between these months with a notable peak of 3.11" (79mm) in December. Along with reduced sunlight time down to 4 hours in December, winter brings with it the most significant weather changes of the year.

Weather in January

The year in Gary, Indiana, kicks off with January, a month known for chilly temperatures and snowfall. Weather conditions continue to display winter characteristics from the previous month. The temperatures are typically on the lower side, with the most significant snowfall registered, 3.11" (79mm). Weather in January »

Weather in February

As Gary transitions into February, the city experiences a subtle change in weather conditions. February carries forward the low temperatures from January, but with less snowfall. The mercury begins to inch up slightly, hinting towards the upcoming spring season. Weather in February »

Weather in March

In March, Gary, Indiana, begins to bid goodbye to the harsh winter. The month sees an increase in temperature, reduced snowfall, and fewer snowfall days. A noticeable change is the increase in daylight hours, and the rainfall reaches 1.3" (33mm), signifying the commencement of the spring season. Weather in March »

Weather in April

As Gary enters April, the city is in full bloom. The weather warms up significantly from March, and the city is devoid of snowfall. April also brings with it an increase in rainfall, a consequence of the warmer temperatures. The city witnesses longer daylight hours, accommodating more outdoor activities. Weather in April »

Weather in May

May ushers in significantly warmer temperatures in Gary, Indiana. The pleasant spring gives way to the early onset of summer. Rainfall peaks during May at 3.35" (85mm), the highest in the year, indicating frequent spring showers. The lengthened daylight hours provide ample opportunities for residents to bask in the warming sunshine. Weather in May »

Weather in June

June in Gary marks the official start of summer. From May, citizens see an increase in temperature and a decrease in rainfall. It is during June that the city experiences the longest daylight hours, which suit many outdoor activities. Weather in June »

Weather in July

July portrays the quintessential summer weather in Gary, Indiana. Coming from June, an increase in temperature makes July the hottest month of the year, with the highest temperature peaking at 79.3°F (26.3°C). July also carries the summer torch with extended daylight hours. Weather in July »

Weather in August

In August, the summer reigns continue in Gary. The weather is similar to that of July, with high temperatures and an abundance of sunshine. August slightly tones down the heat levels from July, providing a semblance of respite. The extended daylight hours persist, infusing the city with vibrancy and energy. Weather in August »

Weather in September

September heralds the transition from summer to autumn in Gary, Indiana. The weather remains warm, although temperatures start to dip slightly from August. There is a decrease in rainfall and daylight hours, indicating the onset of the fall season. Weather in September »

Weather in October

October brings visible changes to Gary's weather. A notable drop in temperature from September ushers in cooler weather. There is also a marked reduction in daylight hours, heralding the onset of shorter days. The city also observes a drop in sunshine hours, signaling the approach of winter. Weather in October »

Weather in November

Gary, Indiana, experiences a stark shift in weather as it breezes into November. The weather in November witnesses a further dip in temperature from October, an obvious sign of the looming winter. The first traces of snowfall are noticed this month. Weather in November »

Weather in December

December in Gary is characterized by cold temperatures, indicating the official commencement of winter. The city witnesses a drop in temperatures from November, and an uptick in snowfall, accountable for the winter holiday scenes. Weather in December »
Updated: Aug 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the coldest months?

January brings the lowest temperatures, with an average high of 30°F (-1.1°C) and an average low of 19.8°F (-6.8°C).

What is the most humid month?

January and February, with an average relative humidity of 82%, are most humid months.

How many days does it rain?

In Gary, during the entire year, the rain falls for 153.8 days and collects up to 25.51" (648mm) of precipitation.

When does it snow?

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

What is the snowiest month?

January is the month with the most snowfall. Snow falls for 13.4 days and accumulates 3.11" (79mm) of snow.

How many days does it snow?

In Gary, during the entire year, snow falls for 45.1 days and aggregates up to 12.36" (314mm) of snow.

What is the month with the least sunshine?

The month with the least sunshine is January, with an average of 3.6h of sunshine.

When is Daylight Saving Time (DST)?

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

When it does not snow?

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

What is the wettest month in Gary?

The month with the most rainfall is June, when the rain falls for 17.2 days and typically aggregates up to 3.66" (93mm) of precipitation.

When are the longest days?

The month with the longest days is June, with an average of 15h and 6min of daylight.

What are the months with the highest UV index?

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

What part of the year is the hottest?

The warmest time of the year is July, with temperatures averaging a high of 79.3°F (26.3°C) and a low of 66.6°F (19.2°C).

What month has the most sunshine?

August has the most sunshine of the year, with an average of 10.5h of sunshine.

What is the least humid month in Gary?

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

What is the driest month?

The month with the least rainfall is December, when the rain falls for 8.7 days and typically collects 1.1" (28mm) of precipitation.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 12min of daylight.

What is the month with the lowest UV index?

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

Average temperature
Gary, IN

Average temperature - Gary, IN

The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (30°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 (19.8°F).

Average pressure
Gary, IN

Average pressure - Gary, IN

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed
Gary, IN

Average wind speed - Gary, IN

The windiest month (with the highest average wind speed) is January (11.4mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).

Average humidity
Gary, IN

Average humidity - Gary, IN

The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (73%).

Average rainfall
Gary, IN

Average rainfall - Gary, IN

The wettest month (with the highest rainfall) is June (3.66").
The driest month (with the least rainfall) is December (1.1").

Average rainfall days
Gary, IN

Average rainfall days - Gary, IN

The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is February (5.9 days).

Average snowfall
Gary, IN

Average snowfall - Gary, IN

The month with the highest snowfall is January (3.11").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days
Gary, IN

Average snowfall days - Gary, IN

The month with the highest number of snowfall days is January (13.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight / Average sunshine
Gary, IN

Average daylight / Average sunshine - Gary, IN

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

Average sunshine days
Gary, IN

Average sunshine days - Gary, IN

The month with the most sunshine days is November (16.5 days).
The month with the least sunshine days is July (9.8 days).

Average visibility
Gary, IN

Average visibility - Gary, IN

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).

Gary, Indiana, USA

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