Harahan (LA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Harahan.
Climate overview of Harahan
Temperatures in Harahan, Louisiana, United States of America, vary greatly throughout the year. August is the hottest month at 33°C (91°F), while January is the coldest at 17°C (63°F).
The city receives considerable rainfall, with around 1720 mm (68 in) annually. August is the wettest month. It has very warm summers and mild winters. May is the sunniest month, averaging 9.3 hours of sunshine per day.
Harahan Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Harahan - and find the best time to visit.
Monthly Temperature in Harahan
The climate in Harahan is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a very warm 33°C (91°F) in August to a moderate 17°C (63°F) in the coolest month, January.
Nights vary from 25°C (77°F) in August to around 7°C (45°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Harahan
Harahan has a notably wet climate with abundant precipitation, recording 1720 mm (68 in) of rainfall per year. The climate in Harahan shows significant variation throughout the year. Expect heavy rainfall in August, the wettest month, with an average of 219 mm (8.6 in) of precipitation over 19 rainy days.
In contrast, the driest month November offers drier and sunnier days, with around 68 mm (2.7 in) of rainfall over 6 rainy days. For more details, please visit our Harahan Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Harahan
For those who appreciate different seasons, Harahan serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 9.3 hours of sunshine daily, and embrace the darker days in January, offering only 5.1 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Water Temperature in Harahan
The mean water temperature over the year ranges from 20°C (68°F) in January to 28°C (82°F) in June.
Water temperature over the year
Humidity in Harahan by Month
The relative humidity is high throughout the year in Harahan.
The city experiences its highest humidity in July, reaching 79%. In February, the humidity drops to its lowest level at 73%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Harahan
The mean wind speed varies between 3 m/s (6 knots) and 5 m/s (10 knots) throughout the year. It is lowest in June, July, August, September and October and highest during February and March. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Harahan
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: October and November
- Warmest weather: June, July and August
- Most sunshine: May and June
- Fewest rainy days: April, October and November
- Best for swimming: Any time of year. The sea stays pleasantly warm year-round.
- Seasonal pattern: Very warm summers and mild winters
Frequently asked questions about the climate in Harahan
What is the best time to visit Harahan?
October and November typically offer the most optimal weather in Harahan. In contrast, June, July and August tend to have less optimal conditions. Harahan has very warm summers and mild winters.
What temperatures can I expect in Harahan?
Daytime highs range from 17°C (63°F) in January to 33°C (91°F) in August. Nighttime lows range from 7°C (45°F) to 25°C (77°F). Temperatures vary considerably through the year.
How much rain does Harahan get?
Annual rainfall is around 1720 mm (68 in). August is the wettest month with 219 mm (8.6 in), while November is the driest with 68 mm (2.7 in).
How sunny is Harahan?
Harahan receives around 2,640 hours of sunshine per year. May is the sunniest month with 279 hours, while January is the cloudiest with just 152 hours. Overall, Harahan enjoys abundant sunshine.
Harahan 3-Day Forecast
Harahan (LA) 3-Day Forecast
Harahan on the map
Harahan is highlighted - select any city to see its climate.
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