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Weather data for St. James is updated regularly with the latest available observations and forecasts.

Now · 12:40 PM

St. James Weather & Hourly Forecast

United States · Louisiana · 70086

91°F

Mostly sunny

Feels like: 100°F

💧 Humidity 64% 🌡 Pressure 30.09 inHg 💨 Wind 3 mph 👁 Visibility 8.3 mi ☁ Clouds 20% ☀️ UV index 8.4 · Very high 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for St. James

Today

1:00 PM

Mostly sunny

91° 💧 0.005 in 💨 3 mph H 64%30.09 inHg

4:00 PM

Mostly sunny

91° 💧 0.010 in 💨 2 mph H 61%30.06 inHg

7:00 PM

Sunny

85° 💧 None 💨 3 mph H 79%30.03 inHg

10:00 PM

Clear night

80° 💧 None 💨 2 mph H 92%30.09 inHg

Tomorrow

1:00 AM

Clear night

79° 💧 None 💨 2 mph H 96%30.09 inHg

4:00 AM

Clear night

77° 💧 None 💨 3 mph H 95%30.09 inHg

7:00 AM

Sunny

76° 💧 0.013 in 💨 6 mph H 96%30.12 inHg

10:00 AM

Light rain

84° 💧 0.038 in 💨 9 mph H 82%30.18 inHg

1:00 PM

Light thunderstorms

80° 💧 0.094 in 💨 7 mph H 92%30.21 inHg

4:00 PM

Overcast

84° 💧 0.005 in 💨 11 mph H 78%30.12 inHg

7:00 PM

Mostly cloudy

82° 💧 0.000 in 💨 6 mph H 84%30.12 inHg

10:00 PM

Mostly clear night

80° 💧 None 💨 7 mph H 88%30.15 inHg

Thursday

1:00 AM

Partly cloudy night

78° 💧 None 💨 4 mph H 95%30.15 inHg

4:00 AM

Partly cloudy night

77° 💧 None 💨 5 mph H 94%30.15 inHg

7:00 AM

Sunny

77° 💧 None 💨 6 mph H 97%30.15 inHg

10:00 AM

Sunny

84° 💧 None 💨 8 mph H 68%30.18 inHg

Today

1:00 PM

Mostly sunny

91° 💧 0.002 in 💨 3 mph H 64%30.09 inHg

2:00 PM

Mostly sunny

91° 💧 0.002 in 💨 2 mph H 62%30.09 inHg

3:00 PM

Mostly sunny

92° 💧 0.001 in 💨 2 mph H 61%30.06 inHg

4:00 PM

Mostly sunny

91° 💧 0.002 in 💨 2 mph H 61%30.06 inHg

5:00 PM

Light rain

90° 💧 0.005 in 💨 4 mph H 63%30.03 inHg

6:00 PM

Sunny

88° 💧 0.004 in 💨 4 mph H 70%30.03 inHg

7:00 PM

Sunny

85° 💧 None 💨 3 mph H 79%30.03 inHg

8:00 PM

Clear night

82° 💧 None 💨 4 mph H 84%30.06 inHg

9:00 PM

Clear night

81° 💧 None 💨 3 mph H 90%30.09 inHg

10:00 PM

Clear night

80° 💧 None 💨 2 mph H 92%30.09 inHg

11:00 PM

Clear night

80° 💧 None 💨 0 mph H 92%30.09 inHg

Tomorrow

12:00 AM

Clear night

79° 💧 None 💨 1 mph H 93%30.09 inHg

1:00 AM

Clear night

79° 💧 None 💨 2 mph H 96%30.09 inHg

2:00 AM

Clear night

78° 💧 None 💨 2 mph H 96%30.09 inHg

3:00 AM

Clear night

78° 💧 None 💨 3 mph H 96%30.09 inHg

4:00 AM

Clear night

77° 💧 None 💨 3 mph H 95%30.09 inHg

5:00 AM

Mostly clear night

76° 💧 None 💨 4 mph H 96%30.09 inHg

6:00 AM

Clear night

76° 💧 None 💨 5 mph H 96%30.12 inHg

7:00 AM

Sunny

76° 💧 None 💨 6 mph H 96%30.12 inHg

8:00 AM

Mostly sunny

79° 💧 0.000 in 💨 6 mph H 91%30.15 inHg

9:00 AM

Light rain

82° 💧 0.012 in 💨 8 mph H 84%30.18 inHg

10:00 AM

Light rain

84° 💧 0.009 in 💨 9 mph H 82%30.18 inHg

11:00 AM

Sunny

87° 💧 0.001 in 💨 10 mph H 75%30.18 inHg

12:00 PM

Light rain

85° 💧 0.028 in 💨 10 mph H 77%30.21 inHg

1:00 PM

Light thunderstorms

80° 💧 0.072 in 💨 7 mph H 92%30.21 inHg

2:00 PM

Light rain

83° 💧 0.012 in 💨 7 mph H 84%30.15 inHg

3:00 PM

Light thunderstorms

83° 💧 0.011 in 💨 10 mph H 80%30.15 inHg

4:00 PM

Overcast

84° 💧 0.000 in 💨 11 mph H 78%30.12 inHg

5:00 PM

Overcast

84° 💧 0.003 in 💨 9 mph H 77%30.12 inHg

6:00 PM

Mostly cloudy

84° 💧 0.002 in 💨 8 mph H 80%30.12 inHg

7:00 PM

Mostly cloudy

82° 💧 0.000 in 💨 6 mph H 84%30.12 inHg

8:00 PM

Mostly cloudy night

81° 💧 None 💨 6 mph H 87%30.12 inHg

9:00 PM

Partly cloudy night

80° 💧 None 💨 7 mph H 88%30.15 inHg

10:00 PM

Mostly clear night

80° 💧 None 💨 7 mph H 88%30.15 inHg

11:00 PM

Clear night

80° 💧 None 💨 6 mph H 89%30.18 inHg

Thursday

12:00 AM

Mostly clear night

79° 💧 None 💨 5 mph H 93%30.18 inHg

1:00 AM

Partly cloudy night

78° 💧 None 💨 4 mph H 95%30.15 inHg

2:00 AM

Mostly cloudy night

78° 💧 None 💨 5 mph H 96%30.15 inHg

3:00 AM

Mostly cloudy night

77° 💧 None 💨 5 mph H 95%30.15 inHg

4:00 AM

Partly cloudy night

77° 💧 None 💨 5 mph H 94%30.15 inHg

5:00 AM

Mostly clear night

77° 💧 None 💨 5 mph H 93%30.15 inHg

6:00 AM

Clear night

77° 💧 None 💨 6 mph H 96%30.15 inHg

7:00 AM

Sunny

77° 💧 None 💨 6 mph H 97%30.15 inHg

8:00 AM

Sunny

79° 💧 None 💨 6 mph H 90%30.18 inHg

9:00 AM

Sunny

82° 💧 None 💨 7 mph H 78%30.18 inHg

10:00 AM

Sunny

84° 💧 None 💨 8 mph H 68%30.18 inHg

11:00 AM

Sunny

86° 💧 None 💨 10 mph H 59%30.18 inHg

12:00 PM

Sunny

87° 💧 None 💨 10 mph H 55%30.18 inHg

1:00 PM

Sunny

88° 💧 None 💨 10 mph H 52%30.15 inHg

2:00 PM

Sunny

89° 💧 None 💨 10 mph H 46%30.15 inHg

3:00 PM

Sunny

88° 💧 None 💨 11 mph H 47%30.12 inHg

4:00 PM

Sunny

87° 💧 None 💨 10 mph H 50%30.09 inHg

5:00 PM

Sunny

86° 💧 None 💨 8 mph H 54%30.09 inHg

6:00 PM

Sunny

84° 💧 None 💨 6 mph H 61%30.09 inHg

7:00 PM

Sunny

79° 💧 None 💨 4 mph H 71%30.12 inHg

Friday

4:00 AM

Clear night

75° 💧 None 💨 1 mph H 93%30.09 inHg

7:00 AM

Sunny

73° 💧 None 💨 5 mph H 98%30.12 inHg

10:00 AM

Sunny

83° 💧 None 💨 6 mph H 70%30.12 inHg

1:00 PM

Sunny

88° 💧 None 💨 8 mph H 49%30.09 inHg

4:00 PM

Sunny

88° 💧 None 💨 7 mph H 49%30.03 inHg

7:00 PM

Sunny

81° 💧 None 💨 3 mph H 73%30.03 inHg

10:00 PM

Clear night

76° 💧 None 💨 5 mph H 79%30.06 inHg

Saturday

1:00 AM

Clear night

74° 💧 None 💨 3 mph H 93%30.00 inHg

4:00 AM

Clear night

74° 💧 None 💨 1 mph H 94%30.00 inHg

7:00 AM

Overcast

72° 💧 None 💨 0 mph H 100%30.00 inHg

10:00 AM

Sunny

83° 💧 None 💨 1 mph H 74%30.03 inHg

1:00 PM

Sunny

90° 💧 None 💨 3 mph H 55%30.00 inHg

4:00 PM

Sunny

90° 💧 None 💨 5 mph H 53%29.94 inHg

7:00 PM

Sunny

83° 💧 None 💨 3 mph H 78%29.91 inHg

10:00 PM

Clear night

79° 💧 None 💨 4 mph H 84%29.94 inHg

Sunday

1:00 AM

Clear night

76° 💧 None 💨 5 mph H 90%29.94 inHg

4:00 AM

Clear night

76° 💧 None 💨 5 mph H 94%29.94 inHg

7:00 AM

Sunny

75° 💧 None 💨 3 mph H 96%29.94 inHg

10:00 AM

Sunny

84° 💧 None 💨 4 mph H 76%29.97 inHg

1:00 PM

Sunny

91° 💧 None 💨 0 mph H 55%29.94 inHg

4:00 PM

Sunny

92° 💧 None 💨 2 mph H 51%29.88 inHg

7:00 PM

Sunny

85° 💧 None 💨 1 mph H 77%29.85 inHg

10:00 PM

Clear night

82° 💧 None 💨 3 mph H 86%29.88 inHg

Monday

1:00 AM

Clear night

79° 💧 None 💨 4 mph H 92%29.91 inHg

7:00 AM

Sunny

80° 💧 None 💨 3 mph H 90%29.91 inHg

1:00 PM

Sunny

78° 💧 None 💨 1 mph H 94%29.94 inHg

7:00 PM

Mostly sunny

91° 💧 None 💨 2 mph H 61%29.94 inHg

Tuesday

1:00 AM

Mostly clear night

85° 💧 None 💨 2 mph H 77%29.85 inHg

7:00 AM

Sunny

78° 💧 None 💨 3 mph H 93%29.91 inHg

1:00 PM

Sunny

77° 💧 None 💨 1 mph H 94%29.94 inHg

7:00 PM

Mostly sunny

92° 💧 None 💨 3 mph H 57%29.94 inHg

Wednesday

1:00 AM

Partly cloudy night

82° 💧 None 💨 3 mph H 89%29.88 inHg

7:00 AM

Sunny

78° 💧 None 💨 2 mph H 93%29.94 inHg

1:00 PM

Sunny

77° 💧 None 💨 1 mph H 96%29.97 inHg

7:00 PM

Partly cloudy night

91° 💧 None 💨 4 mph H 60%29.97 inHg

Thursday

1:00 AM

Mostly clear night

84° 💧 None 💨 1 mph H 78%29.91 inHg

7:00 AM

Sunny

78° 💧 None 💨 3 mph H 95%29.94 inHg

1:00 PM

Sunny

77° 💧 None 💨 4 mph H 95%29.97 inHg

7:00 PM

Mostly clear night

93° 💧 None 💨 4 mph H 49%29.94 inHg

Friday

1:00 AM

Clear night

86° 💧 None 💨 3 mph H 67%29.88 inHg

7:00 AM

Sunny

79° 💧 None 💨 4 mph H 89%29.94 inHg

1:00 PM

Sunny

77° 💧 None 💨 3 mph H 94%29.94 inHg

7:00 PM

Mostly clear night

93° 💧 None 💨 3 mph H 49%29.94 inHg

Saturday

1:00 AM

Clear night

85° 💧 None 💨 6 mph H 70%29.88 inHg

7:00 AM

Sunny

78° 💧 None 💨 3 mph H 91%29.91 inHg

1:00 PM

Sunny

77° 💧 None 💨 1 mph H 96%29.91 inHg

7:00 PM

Mostly clear night

92° 💧 None 💨 2 mph H 52%29.91 inHg

Sunday

1:00 AM

Clear night

86° 💧 None 💨 6 mph H 65%29.85 inHg

7:00 AM

Sunny

79° 💧 None 💨 4 mph H 91%29.88 inHg

1:00 PM

Sunny

77° 💧 None 💨 3 mph H 97%29.88 inHg

7:00 PM

Mostly clear night

92° 💧 None 💨 2 mph H 53%29.88 inHg

Monday

1:00 AM

Partly cloudy night

84° 💧 None 💨 2 mph H 79%29.80 inHg

7:00 AM

Mostly sunny

80° 💧 None 💨 2 mph H 91%29.85 inHg

1:00 PM

Sunny

76° 💧 None 💨 3 mph H 97%29.85 inHg

7:00 PM

Partly cloudy night

92° 💧 None 💨 3 mph H 54%29.85 inHg

Tuesday

1:00 AM

Overcast night

81° 💧 None 💨 4 mph H 95%29.83 inHg

7:00 AM

Partly cloudy

77° 💧 None 💨 3 mph H 93%29.88 inHg

1:00 PM

Mostly sunny

77° 💧 None 💨 6 mph H 92%29.91 inHg

7:00 PM

Moderate rain

83° 💧 None 💨 11 mph H 71%29.94 inHg

Wednesday

1:00 AM

Mostly cloudy night

79° 💧 None 💨 7 mph H 81%29.94 inHg

In St. James and, more broadly, across the state of Louisiana: The rest of the day will bring a mix of sun and clouds, with temperatures ranging from 83 to 90 degrees Fahrenheit. A slight chance of rain exists, with a small accumulation possible and up to a 34% chance of showers. Winds will remain light, coming from the south at around 7 mph, with gusts reaching up to 13 mph. Overall, expect warm and relatively calm conditions through the afternoon, with brief periods of cloud cover and the possibility of isolated light showers.

15-Day Weather Outlook for St. James

TomorrowTomorrow

Light thunderstorms 87°/76° 💧 None 💨 11 mph

Thursday, Sep 17Thu Sep 17

Mostly sunny 89°/77° 💧 None 💨 11 mph

Friday, Sep 18Fri Sep 18

Sunny 88°/73° 💧 0.182 in 💨 8 mph

Saturday, Sep 19Sat Sep 19

Overcast 90°/72° 💧 0.003 in 💨 5 mph

Sunday, Sep 20Sun Sep 20

Sunny 92°/75° 💧 0.002 in 💨 5 mph

Monday, Sep 21Mon Sep 21

Mostly sunny 91°/78° 💧 0.031 in 💨 4 mph

Tuesday, Sep 22Tue Sep 22

Mostly sunny 92°/77° 💧 0.011 in 💨 3 mph

Wednesday, Sep 23Wed Sep 23

Partly cloudy 91°/77° 💧 0.076 in 💨 4 mph

Thursday, Sep 24Thu Sep 24

Mostly sunny 93°/77° 💧 0.019 in 💨 4 mph

Friday, Sep 25Fri Sep 25

Mostly sunny 93°/77° 💧 0.001 in 💨 4 mph

Saturday, Sep 26Sat Sep 26

Mostly sunny 92°/77° 💧 0.002 in 💨 6 mph

Sunday, Sep 27Sun Sep 27

Mostly sunny 92°/77° 💧 0.001 in 💨 6 mph

Monday, Sep 28Mon Sep 28

Partly cloudy 92°/76° 💧 0.053 in 💨 3 mph

Tuesday, Sep 29Tue Sep 29

Moderate rain 83°/77° 💧 0.145 in 💨 11 mph

Wednesday, Sep 30Wed Sep 30

Mostly cloudy 79°/79° 💧 0.193 in 💨 7 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in St. James

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for St. James

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 1:00 PM

PM2.5 Fine particles Good 1,1µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 1,6µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Good 58,6µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 0,2µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is favorable for outdoor activities.

UV & HEALTH

UV, Sun & Health Outlook in St. James

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 9,2Very high 😊Good

Tomorrow UV 9,0Very high 🙂Fair

Thursday UV 8,0Very high 😐Moderate

Friday UV 8,0Very high 😐Moderate

Saturday UV 8,0Very high 🙂Fair

Sunday UV 7,0High —Unavailable

Monday UV 8,0Very high —Unavailable

Hourly UV index today

1:00 PMUV 9,2 2:00 PMUV 8,5 3:00 PMUV 6,4 4:00 PMUV 2,9 5:00 PMUV 1,2 6:00 PMUV 0,3 7:00 PMUV 0,0

Today's weather health advice Open today's recommendations.

Very high UV risk

Use SPF 50+ sunscreen, a hat and sunglasses. Seek shade and limit exposure around midday.

Good air quality

Air quality is good and outdoor activities can be enjoyed normally.

High heat

Stay hydrated and avoid intense exercise during the hottest part of the day.

Best in the morning or late in the day

For walking, running or cycling, prefer the early morning or late afternoon.

WIND OUTLOOK

Hourly Wind Forecast for St. James

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · ST. JAMES, LOUISIANA

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 2:00 AM–3:00 AM.

94/100Best-hour score

BEST TIME TONIGHT 2:00 AM–3:00 AM Astronomical darkness: 8:29 PM–5:28 AM

☁ Cloud cover 2% Real hourly forecast for the best viewing hour.

☾ Moonlight 21% Waxing Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 57° high at the best hour.

✦ Estimated visible meteors 1–4/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min73%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

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Forecast data for St. James were last refreshed today at 12:40 PM. The current forecast period extends through 17/09/2026 at 10:00 AM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.