Patterson, LA Weather Forecast
St. Mary Parish, Louisiana
The next few hours
A dry overnight, partly cloudy
It is 57° with a dew point of 46°, which is dry for this time of year. The sky is partly cloudy.
Nothing in the next day and a half is wet enough to move plans for.
Colour and bar height both show how heavy the rain would look on radar. A dotted line means the model has no reading for that hour, which is not the same as no rain.
Hour by hour
Quiet through the next day and a half
Nothing wet is expected over the next day and a half.
The overnight low settles near 52°. Tomorrow tops out near 73°.
Sunrise and sunset
Next five days, scored 0 to 100The first day or two use the HRRR and NBM cloud layers. Later days only have total cloud, so treat them as a rough guide.
Know when sunset at this place will be worth a photo
We score every sunrise and sunset here from the cloud, haze and smoke forecast, and let you know when one is likely to light up. Sunrise the evening before, sunset a few hours ahead.
Seven-day outlook
45–76°F across the weekThe week runs between 45° and 75°, with Tuesday the warmest day of it. There is no real trend across it: one day looks much like the next. Every day in the outlook stays dry.
About the Patterson forecast
Patterson sits at 29.6909°N, 91.3095°W in St. Mary Parish, Louisiana. The forecast above is drawn for that point from the National Weather Service's own computer models: a seven-day outlook, and a finer-grained one covering the next eighteen hours where it reaches, and the radar and alert panels show what the Weather Service has out over the area right now.
- County
- St. Mary Parish
- Coordinates
- 29.6909°N, 91.3095°W
- Population
- 5,636 · 2023 estimate
- Land area
- 2.524 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Patterson, and the forecast is for that location, not for every address inside the city limits, and a large city can have real weather differences from one side to the other.
How well can the network see Patterson?
The nearest Doppler radar is KHDC (Hammond, LA), 79 miles to the NE. A WSR-88D's lowest routine scan sits half a degree above horizontal, and the earth curves away beneath it, so by the time that beam reaches Patterson its center is about 6,700 ft above ground. That is far enough out that the beam has climbed above the lowest few thousand feet. Storm structure aloft is visible; a shallow circulation near the ground may not be, and a warning here can arrive before anything looks dramatic on the radar picture.
The closest instrument actually measuring the air is KPTN · Patterson/Williams Mem on the ASOS/AWOS network, 2.2 miles away. Close enough that its readings are, for practical purposes, the conditions in town.
Beam height is the standard 4/3-earth approximation for the 0.5° scan and assumes normal refraction; it is where the center of the beam is, not its edges, and unusual temperature profiles bend it. Radar siting from the NWS WSR-88D network, station positions from the Louisiana observing network as of this build.
Forecasts near Patterson
- Berwick, LA5 mi
- Morgan City, LA7 mi
- Franklin, LA14 mi
- Jeanerette, LA27 mi
- Thibodaux, LA31 mi
- Donaldsonville, LA34 mi
- Houma, LA37 mi
- New Iberia, LA38 mi
Elsewhere in Louisiana
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