Port Allen (LA) Temperature by Month
The average annual maximum temperature in Port Allen, Louisiana, United States of America is 26°C (79°F), with daytime highs ranging from 16°C (61°F) in January to 33°C (91°F) in August. This page covers monthly averages, day-night differences, and how Port Allen compares to cities worldwide.
Port Allen Monthly Temperatures
Depending on the time of the year, temperatures range from very warm to mild in Port Allen. Nighttime lows follow the same pattern, ranging from 23°C (73°F) to 5°C (41°F).
The chart below illustrates the average maximum day and minimum night temperatures in Port Allen by month:
Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating. August, the warmest month of the year, receives 270 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Port Allen vs the United States of America
The map below shows the annual temperature across the United States of America. You can also select individual months if you want to compare a specific time of year.
very warm
warm
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moderate
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very cold
Port Allen vs World: Temperature Compared
Port Allen's average annual maximum temperature is 26°C (79°F). To put that in context, here's how it compares to a few well-known destinations:
Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.
Interlaken, Switzerland averages 8°C (46°F) a year, with cold winters and cool summers thanks to its Alpine setting.
San Francisco, USA averages 19°C (66°F) annually, but with little seasonal variation — summers are often cool and foggy, winters mild.
Melbourne, Australia averages 20°C (68°F) annually — known for unpredictable weather, with four seasons sometimes happening in one day.
What Does the Temperature Feel Like in Port Allen?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In Port Allen, January is the coolest month, with average highs of 16°C (61°F) and humidity around 73% — considered high. In August, the warmest month, temperatures average 33°C (91°F) with 77% humidity — conditions that feel high. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Port Allen this rarely lasts long on the ground.
For more on Port Allen's weather — including monthly rainfall, sunshine hours, and humidity — visit our Port Allen climate page.
