Climate and monthly weather forecast
Lafayette, LA

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A monument and trees in the tranquil Lafayette Square, Louisiana
A monument and trees in the tranquil Lafayette Square, Louisiana

The climate of Lafayette

Situated in the Southern region of the United States, Lafayette, Louisiana, is characterized by a Humid subtropical climate type, denoted as Cfa in the Köppen climatic classification. This classification signifies a climate with no dry season, high humidity, and significant rainfall throughout the year.

By analyzing the provided climatological data, it becomes apparent that Lafayette experiences a significant variation in temperatures throughout the year, ranging from an average high of 90°F (32.2°C) in August to an average low of 44.2°F (6.8°C) in January. Humidity remains relatively steady across the year, fluctuating slightly from 76% in May to 81% in February. Annual rainfall ranges from a high of 2.8" (71mm) in August to a low of 0.83" (21mm) in March, demonstrating the existence of a substantial wet season during the late summer months.

Lafayette's unique weather patterns include the peak of rainfall in late summer and a steadily increasing UV index from January to May, with the highest recorded index value of 7 seen from May to August. The city also experiences an average maximum wind speed of 8.8mph (14.2km/h) in February and April, decreasing to a minimum of 5.3mph (8.5km/h) in July and August. These conditions contribute to Lafayette's climate, which is marked by mild winters and hot, humid summers.

The best time to visit Lafayette

The ideal time to visit Lafayette would arguably be in the spri- ng, between March and May. During this period, average high temperatures fluctuate between 70.9°F (21.6°C) and 84.6°F (29.2°C), providing comfortable weather conditions for outdoor activities. Additionally, relative humidity values tend to be lower during this time, falling between 76% and 80%.

The worst time to visit Lafayette

Due to Lafayette's subtropical climate, the month of August proves to be the least hospitable for visitors. The worst of the summer heat is felt during this period, as demonstrated by the highest recorded average temperature of 90°F (32.2°C). Furthermore, this period also coincides with the highest average monthly rainfall of 2.8" (71mm), leading to increased likelihood of rain-related disruptions.

Spring weather in Lafayette

As the calendar turns to spring, Lafayette undergoes a notable transition in its weather. From March through to May, high temperatures rise from 70.9°F (21.6°C) to 84.6°F (29.2°C). Correspondingly, the night-time low temperatures also increase from 54.3°F (12.4°C) to 67.5°F (19.7°C). Rainfall remains relatively consistent throughout the spring months, ranging from 0.83" (21mm) to 1.46" (37mm).

Summer weather in Lafayette

The summer months from June to August represent the apex of Lafayette's subtropical climate. The city experiences its annual maximum average temperatures peaking from 89.2°F (31.8°C) to 90°F (32.2°C), while the night temperatures remain warm, fluctuating from 73°F (22.8°C) to 74.8°F (23.8°C).

Autumn weather in Lafayette

During the autumn months from September to November, average high temperatures in Lafayette slowly drop from 86.7°F (30.4°C) to 68.4°F (20.2°C). Meanwhile, average low temperatures also decrease, moving from 70.5°F (21.4°C) in September down to 52°F (11.1°C) by November, signaling the approaching cold season.

Winter weather in Lafayette

Winter in Lafayette is relatively mild. While December sees average high temperatures of 61.9°F (16.6°C), January experiences the coldest average low temperature of 44.2°F (6.8°C). Very nominal amounts of snowfall are expected during this period, with the highest recorded snowfall being 0.1 days in January.

Weather in January

The onset of a new year in Lafayette, Louisiana is accompanied by a mild winter. Compared to a typical Christmas, January offers chilled evenings with temperatures lying between 44.2°F (6.8°C) and 58.8°F (14.9°C). The city usually experiences some rain, ample sunshine during the day, and consistent cloud coverage. Weather in January »

Weather in February

As the calendar flips to February, Lafayette witnesses an ascending trend in temperatures. Providing warmer experiences during the day compared to January, rain can still be expected during this month. The increase in temperature influences the atmospheric humidity and pressure as well. Weather in February »

Weather in March

March brings along warmer temperatures, hinting at an early introduction to spring. This month presents less rainfall compared to previous months with a slight shift from 0.91" (23mm) in February to 0.83" (21mm). Daylight stretches out as nature springs back to life, making this period ideal for outdoor activities. Weather in March »

Weather in April

April offers beautiful spring weather. It is a transformative period with temperatures lying between 60.1°F (15.6°C) and 77.5°F (25.3°C), the highest thus far in the year. The increased heat levels lead to a moderate drop in humidity, still, the city continues to enjoy plentiful sunshine. Weather in April »

Weather in May

May brings a distinct change, with the city being exposed to increased sunlight for up to 13.7 hours per day. It becomes considerably warmer from April to May. However, the cool winds provide a relief from the impending hot summer. In spite of the heat, precipitation and humidity levels stay consistent, maintaining the environment's moisture. Weather in May »

Weather in June

During June, Lafayette transitions into summer with temperatures oscillating between 73°F (22.8°C) and 89.2°F (31.8°C). Daylight extends to its maximum duration post which it starts to dwindle. The city experiences its highest rainfall of the year in this month. Weather in June »

Weather in July

July is the season of high heat in Lafayette with the temperatures soaring to a peak of 89.8°F (32.1°C). Despite the heat, there is a significant decrease in wind speed from 5.9mph (9.5km/h) to 5.3mph (8.5km/h), compared to June. Weather in July »

Weather in August

August amplifies the summer conditions as it might turn out to be the hottest month, despite temperatures being between 74.8°F (23.8°C) and 90°F (32.2°C), similar to July. Combining the peak heat with the highest levels of rainfall and humidity, it is the epitome of a typical Louisiana summer. Weather in August »

Weather in September

Relief from the heat begins in September as Lafayette, Louisiana starts moving towards fall. Post the extreme heat in August, the temperatures drop providing residents with a glimpse of the forthcoming autumn season. As the city bids goodbye to the scorching summers, the frequency of rainfall reduces. Weather in September »

Weather in October

October plays a significant role in shifting Lafayette's weather. It encompasses the lowest rainfall of the year, dropping from 1.38" (35mm) in September to 1.46" (37mm). The arrival of fall brings along cool evenings while days remain warm. Weather in October »

Weather in November

November holds an essential place as it debuts the late fall season in Lafayette. The temperatures drop further compared to October, bringing along chilly evenings. The city starts preparing to welcome winter as the daylight hours lessen. Weather in November »

Weather in December

December marks the arrival of winter and brings a year-end chill. Compared to the warmth of November, December is colder with temperatures fluctuating between 48°F (8.9°C) and 61.9°F (16.6°C). The shorter daylight hours are compensated by brilliant sunshine during the day. Weather in December »
Updated: Aug 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest?

Lafayette's coldest month, January, registers temperatures that range from a high of 58.8°F (14.9°C) to a low of 44.2°F (6.8°C).

How many days does it rain?

In Lafayette, during the entire year, the rain falls for 143.3 days and collects up to 17.91" (455mm) of precipitation.

When does it snow?

January is the only month when snow falls.

When does it snow the most?

The month with the most snowfall days is January, when snow falls for 0.1 days.

How many days does it snow?

In Lafayette, during the entire year, snow falls for 0.1 days.

What is the most humid month in Lafayette?

With an average relative humidity of 81%, February is the most humid month.

When it does not snow?

In Lafayette, snow does not fall in February through December.

What is the driest month?

The month with the least rainfall is March, when the rain falls for 10.3 days and typically collects 0.83" (21mm) of precipitation.

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.

What is the month with the highest UV index?

The months with the highest UV index are May through August, with an average maximum UV index of 7.

When are the longest days?

With an average of 14h and 6min of daylight, June has the longest days of the year.

What month has the most sunshine?

The month with the most sunshine is June, with an average of 10.6h of sunshine.

What is the warmest month?

August, having an average high-temperature of 90°F (32.2°C) and an average low-temperature of 74.8°F (23.8°C), is the warmest month.

What is the rainiest month?

August is the month with the most rainfall. Rain falls for 20 days and accumulates 2.8" (71mm) of precipitation.

What is the least humid month?

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

What is the month with the shortest days?

The month with the shortest days is December, with an average of 10h and 12min of daylight.

What is the month with the least sunshine?

December has the least sunshine of the year, with an average of 5h of sunshine.

When is the lowest UV index?

With an average maximum UV index of 3, December is the month with the lowest UV index.

Average temperature
Lafayette, LA

Average temperature - Lafayette, LA

The warmest month (with the highest average high temperature) is August (90°F).
The month with the lowest average high temperature is January (58.8°F).

The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).

Average pressure
Lafayette, LA

Average pressure - Lafayette, LA

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed
Lafayette, LA

Average wind speed - Lafayette, LA

The windiest month (with the highest average wind speed) is February (8.2mph).
The calmest months (with the lowest average wind speed) are July, August and September (5.3mph).

Average humidity
Lafayette, LA

Average humidity - Lafayette, LA

The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is October (73%).

Average rainfall
Lafayette, LA

Average rainfall - Lafayette, LA

The wettest month (with the highest rainfall) is August (2.8").
The driest month (with the least rainfall) is March (0.83").

Average rainfall days
Lafayette, LA

Average rainfall days - Lafayette, LA

The month with the highest number of rainy days is August (20 days).
The months with the least rainy days are January and November (7.8 days).

Average snowfall days
Lafayette, LA

Average snowfall days - Lafayette, LA

The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).

Average daylight / Average sunshine
Lafayette, LA

Average daylight / Average sunshine - Lafayette, LA

The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).

Average sunshine days
Lafayette, LA

Average sunshine days - Lafayette, LA

The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is August (8 days).

Average visibility
Lafayette, LA

Average visibility - Lafayette, LA

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).

Lafayette, Louisiana, USA

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