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Current weather in San Juan is broken clouds.

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Weather data for San Juan is updated regularly with the latest available observations and forecasts.

Now · 8:02 AM

San Juan Weather & Hourly Forecast

United States · Texas · 78589

80°F

Mostly cloudy

Feels like: 89°F

💧 Humidity 83% 🌡 Pressure 29.97 inHg 💨 Wind 4 mph 👁 Visibility 21.5 mi ☁ Clouds 67% ☀️ UV index 0.0 · Low 🌅 Sunrise 7:20 AM 🌇 Sunset 7:29 PM

Hourly Forecast for San Juan

Today

9:00 AM

Partly cloudy

84° 💧 0.009 in 💨 4 mph H 74%29.97 inHg

12:00 PM

Light rain

93° 💧 0.015 in 💨 7 mph H 49%29.97 inHg

3:00 PM

Overcast

95° 💧 0.011 in 💨 9 mph H 42%29.91 inHg

6:00 PM

Mostly sunny

92° 💧 0.005 in 💨 11 mph H 47%29.91 inHg

9:00 PM

Partly cloudy night

86° 💧 None 💨 8 mph H 64%29.94 inHg

Tomorrow

12:00 AM

Mostly cloudy night

83° 💧 0.002 in 💨 5 mph H 73%30.00 inHg

3:00 AM

Mostly cloudy night

82° 💧 0.001 in 💨 4 mph H 78%29.97 inHg

6:00 AM

Clear night

80° 💧 0.001 in 💨 3 mph H 82%29.94 inHg

9:00 AM

Mostly sunny

84° 💧 0.019 in 💨 4 mph H 71%30.00 inHg

12:00 PM

Light rain

92° 💧 0.014 in 💨 6 mph H 54%30.00 inHg

3:00 PM

Partly cloudy

95° 💧 0.097 in 💨 7 mph H 44%29.91 inHg

6:00 PM

Light rain

86° 💧 0.076 in 💨 9 mph H 68%29.91 inHg

9:00 PM

Clear night

84° 💧 0.001 in 💨 8 mph H 76%29.94 inHg

Friday

12:00 AM

Mostly cloudy night

82° 💧 None 💨 5 mph H 82%30.00 inHg

3:00 AM

Mostly clear night

81° 💧 0.001 in 💨 4 mph H 86%29.97 inHg

6:00 AM

Mostly clear night

79° 💧 0.001 in 💨 3 mph H 91%29.97 inHg

Today

9:00 AM

Partly cloudy

84° 💧 None 💨 4 mph H 74%29.97 inHg

10:00 AM

Partly cloudy

87° 💧 0.004 in 💨 5 mph H 64%29.97 inHg

11:00 AM

Light rain

90° 💧 0.005 in 💨 7 mph H 56%29.97 inHg

12:00 PM

Light rain

93° 💧 0.004 in 💨 7 mph H 49%29.97 inHg

1:00 PM

Mostly cloudy

96° 💧 0.004 in 💨 8 mph H 43%29.94 inHg

2:00 PM

Light rain

96° 💧 0.008 in 💨 8 mph H 42%29.94 inHg

3:00 PM

Overcast

95° 💧 0.001 in 💨 9 mph H 42%29.91 inHg

4:00 PM

Light rain

95° 💧 0.005 in 💨 10 mph H 43%29.91 inHg

5:00 PM

Light rain

95° 💧 0.005 in 💨 11 mph H 43%29.88 inHg

6:00 PM

Mostly sunny

92° 💧 0.003 in 💨 11 mph H 47%29.91 inHg

7:00 PM

Mostly sunny

90° 💧 0.002 in 💨 11 mph H 52%29.91 inHg

8:00 PM

Mostly clear night

87° 💧 None 💨 10 mph H 60%29.94 inHg

9:00 PM

Partly cloudy night

86° 💧 None 💨 8 mph H 64%29.94 inHg

10:00 PM

Mostly cloudy night

85° 💧 None 💨 7 mph H 68%29.97 inHg

11:00 PM

Mostly cloudy night

84° 💧 None 💨 6 mph H 72%30.00 inHg

Tomorrow

12:00 AM

Mostly cloudy night

83° 💧 0.001 in 💨 5 mph H 73%30.00 inHg

1:00 AM

Partly cloudy night

83° 💧 0.001 in 💨 4 mph H 75%30.00 inHg

2:00 AM

Partly cloudy night

82° 💧 None 💨 4 mph H 77%29.97 inHg

3:00 AM

Mostly cloudy night

82° 💧 None 💨 4 mph H 78%29.97 inHg

4:00 AM

Mostly cloudy night

81° 💧 0.001 in 💨 4 mph H 79%29.94 inHg

5:00 AM

Mostly clear night

81° 💧 None 💨 3 mph H 81%29.94 inHg

6:00 AM

Clear night

80° 💧 None 💨 3 mph H 82%29.94 inHg

7:00 AM

Clear night

80° 💧 0.001 in 💨 4 mph H 83%29.97 inHg

8:00 AM

Sunny

81° 💧 None 💨 4 mph H 81%29.97 inHg

9:00 AM

Mostly sunny

84° 💧 0.002 in 💨 4 mph H 71%30.00 inHg

10:00 AM

Light rain

87° 💧 0.009 in 💨 6 mph H 65%30.00 inHg

11:00 AM

Light rain

90° 💧 0.008 in 💨 6 mph H 59%30.00 inHg

12:00 PM

Light rain

92° 💧 0.008 in 💨 6 mph H 54%30.00 inHg

1:00 PM

Light rain

95° 💧 0.005 in 💨 6 mph H 48%29.97 inHg

2:00 PM

Overcast

96° 💧 None 💨 7 mph H 44%29.94 inHg

3:00 PM

Partly cloudy

95° 💧 0.002 in 💨 7 mph H 44%29.91 inHg

4:00 PM

Light rain

93° 💧 0.049 in 💨 9 mph H 48%29.88 inHg

5:00 PM

Light rain

91° 💧 0.046 in 💨 10 mph H 54%29.88 inHg

6:00 PM

Light rain

86° 💧 0.069 in 💨 9 mph H 68%29.91 inHg

7:00 PM

Light rain

86° 💧 0.006 in 💨 8 mph H 68%29.91 inHg

8:00 PM

Mostly clear night

85° 💧 0.001 in 💨 8 mph H 71%29.94 inHg

9:00 PM

Clear night

84° 💧 0.001 in 💨 8 mph H 76%29.94 inHg

10:00 PM

Partly cloudy night

83° 💧 None 💨 7 mph H 79%29.97 inHg

11:00 PM

Partly cloudy night

82° 💧 None 💨 6 mph H 81%30.00 inHg

Friday

12:00 AM

Mostly cloudy night

82° 💧 None 💨 5 mph H 82%30.00 inHg

1:00 AM

Mostly cloudy night

81° 💧 None 💨 4 mph H 85%30.00 inHg

2:00 AM

Mostly clear night

81° 💧 None 💨 5 mph H 86%30.00 inHg

3:00 AM

Mostly clear night

81° 💧 0.001 in 💨 4 mph H 86%29.97 inHg

4:00 AM

Partly cloudy night

80° 💧 None 💨 3 mph H 88%29.97 inHg

5:00 AM

Mostly clear night

80° 💧 None 💨 3 mph H 89%29.97 inHg

6:00 AM

Mostly clear night

79° 💧 None 💨 3 mph H 91%29.97 inHg

7:00 AM

Partly cloudy night

79° 💧 None 💨 3 mph H 92%29.97 inHg

8:00 AM

Partly cloudy

79° 💧 0.001 in 💨 3 mph H 90%30.00 inHg

9:00 AM

Mostly cloudy

82° 💧 None 💨 3 mph H 82%30.00 inHg

10:00 AM

Light rain

85° 💧 0.005 in 💨 4 mph H 74%30.00 inHg

11:00 AM

Light rain

87° 💧 0.008 in 💨 5 mph H 67%30.00 inHg

12:00 PM

Light rain

90° 💧 0.007 in 💨 5 mph H 60%30.00 inHg

1:00 PM

Overcast

93° 💧 0.002 in 💨 5 mph H 54%29.97 inHg

2:00 PM

Overcast

95° 💧 None 💨 5 mph H 49%29.94 inHg

3:00 PM

Overcast

94° 💧 None 💨 6 mph H 49%29.91 inHg

4:00 PM

Thunderstorms

80° 💧 0.120 in 💨 7 mph H 95%29.91 inHg

5:00 PM

Light rain

88° 💧 0.017 in 💨 6 mph H 68%29.88 inHg

6:00 PM

Mostly sunny

90° 💧 0.001 in 💨 8 mph H 60%29.88 inHg

7:00 PM

Light thunderstorms

87° 💧 0.006 in 💨 9 mph H 65%29.88 inHg

10:00 PM

Mostly clear night

83° 💧 None 💨 7 mph H 79%29.94 inHg

Saturday

1:00 AM

Mostly clear night

81° 💧 None 💨 3 mph H 87%29.97 inHg

4:00 AM

Mostly clear night

80° 💧 None 💨 2 mph H 91%29.94 inHg

7:00 AM

Mostly cloudy night

79° 💧 None 💨 2 mph H 93%29.94 inHg

10:00 AM

Light rain

86° 💧 None 💨 4 mph H 72%29.97 inHg

1:00 PM

Light rain

93° 💧 None 💨 4 mph H 56%29.94 inHg

4:00 PM

Mostly cloudy

95° 💧 None 💨 5 mph H 51%29.85 inHg

7:00 PM

Partly cloudy

89° 💧 None 💨 8 mph H 64%29.85 inHg

10:00 PM

Partly cloudy night

83° 💧 None 💨 7 mph H 81%29.94 inHg

Sunday

1:00 AM

Mostly cloudy night

82° 💧 None 💨 5 mph H 86%29.94 inHg

4:00 AM

Partly cloudy night

80° 💧 None 💨 3 mph H 92%29.91 inHg

7:00 AM

Overcast night

79° 💧 None 💨 2 mph H 95%29.91 inHg

10:00 AM

Partly cloudy

86° 💧 None 💨 3 mph H 75%29.94 inHg

1:00 PM

Partly cloudy

94° 💧 None 💨 3 mph H 55%29.91 inHg

4:00 PM

Moderate rain

87° 💧 None 💨 12 mph H 67%29.85 inHg

7:00 PM

Mostly cloudy

87° 💧 None 💨 7 mph H 70%29.83 inHg

10:00 PM

Overcast night

83° 💧 None 💨 6 mph H 79%29.88 inHg

Monday

1:00 AM

Partly cloudy night

81° 💧 None 💨 6 mph H 87%29.88 inHg

4:00 AM

Mostly clear night

80° 💧 None 💨 4 mph H 91%29.85 inHg

7:00 AM

Clear night

79° 💧 None 💨 3 mph H 95%29.83 inHg

10:00 AM

Partly cloudy

86° 💧 None 💨 6 mph H 72%29.85 inHg

1:00 PM

Mostly sunny

94° 💧 None 💨 6 mph H 53%29.83 inHg

4:00 PM

Light rain

91° 💧 None 💨 9 mph H 57%29.74 inHg

7:00 PM

Partly cloudy

89° 💧 None 💨 8 mph H 60%29.71 inHg

Tuesday

1:00 AM

Overcast night

81° 💧 None 💨 9 mph H 85%29.77 inHg

7:00 AM

Mostly clear night

80° 💧 None 💨 7 mph H 89%29.74 inHg

1:00 PM

Mostly sunny

96° 💧 None 💨 12 mph H 45%29.71 inHg

7:00 PM

Overcast

92° 💧 None 💨 12 mph H 54%29.62 inHg

Wednesday

1:00 AM

Partly cloudy night

84° 💧 None 💨 12 mph H 77%29.71 inHg

7:00 AM

Partly cloudy night

78° 💧 None 💨 7 mph H 96%29.74 inHg

1:00 PM

Mostly cloudy

89° 💧 None 💨 13 mph H 56%29.83 inHg

7:00 PM

Sunny

86° 💧 None 💨 7 mph H 47%29.80 inHg

Thursday

1:00 AM

Clear night

74° 💧 None 💨 6 mph H 69%29.85 inHg

7:00 AM

Clear night

68° 💧 None 💨 2 mph H 86%29.91 inHg

1:00 PM

Sunny

89° 💧 None 💨 6 mph H 37%29.94 inHg

7:00 PM

Sunny

84° 💧 None 💨 7 mph H 31%29.88 inHg

Friday

1:00 AM

Clear night

70° 💧 None 💨 4 mph H 73%29.97 inHg

7:00 AM

Clear night

65° 💧 None 💨 5 mph H 85%30.00 inHg

1:00 PM

Mostly cloudy

85° 💧 None 💨 8 mph H 39%30.00 inHg

7:00 PM

Partly cloudy

82° 💧 None 💨 10 mph H 56%29.94 inHg

Saturday

1:00 AM

Mostly cloudy night

76° 💧 None 💨 7 mph H 76%30.00 inHg

7:00 AM

Clear night

72° 💧 None 💨 6 mph H 81%30.00 inHg

1:00 PM

Overcast

88° 💧 None 💨 5 mph H 45%30.00 inHg

7:00 PM

Overcast

84° 💧 None 💨 9 mph H 55%29.94 inHg

Sunday

1:00 AM

Clear night

76° 💧 None 💨 4 mph H 70%30.00 inHg

7:00 AM

Clear night

75° 💧 None 💨 5 mph H 74%30.00 inHg

1:00 PM

Partly cloudy

93° 💧 None 💨 8 mph H 36%30.00 inHg

7:00 PM

Mostly cloudy

84° 💧 None 💨 13 mph H 52%29.97 inHg

Monday

1:00 AM

Overcast night

78° 💧 None 💨 7 mph H 64%30.03 inHg

7:00 AM

Mostly cloudy night

73° 💧 None 💨 6 mph H 74%30.03 inHg

1:00 PM

Light rain

89° 💧 None 💨 8 mph H 40%30.06 inHg

7:00 PM

Overcast

84° 💧 None 💨 11 mph H 46%29.97 inHg

Tuesday

1:00 AM

Mostly cloudy night

76° 💧 None 💨 5 mph H 71%30.06 inHg

7:00 AM

Partly cloudy night

71° 💧 None 💨 6 mph H 84%30.03 inHg

1:00 PM

Partly cloudy

90° 💧 None 💨 8 mph H 39%30.03 inHg

7:00 PM

Overcast

86° 💧 None 💨 13 mph H 47%29.97 inHg

Wednesday

1:00 AM

Mostly clear night

78° 💧 None 💨 7 mph H 71%30.03 inHg

7:00 AM

Mostly clear night

75° 💧 None 💨 5 mph H 82%30.03 inHg

1:00 PM

Mostly sunny

92° 💧 None 💨 8 mph H 36%30.03 inHg

7:00 PM

Sunny

87° 💧 None 💨 12 mph H 42%29.94 inHg

In San Juan and, more broadly, across the state of Texas: Clear skies this morning give way to very hot conditions as the day progresses, with temperatures climbing between 73 and 99 degrees Fahrenheit. In the afternoon, the heat will intensify, and some brief showers may develop, bringing around 0.04 inches of rain. There is a moderate chance—up to 61%—for rain during the peak hours. Winds will remain light from the southwest, generally around 5 mph, with occasional gusts reaching up to 13 mph. Overall, expect a hot and mainly dry day with a brief window for rain in the late afternoon.

15-Day Weather Outlook for San Juan

TomorrowTomorrow

Mostly cloudy 96°/80° 💧 None 💨 10 mph

Friday, Sep 25Fri Sep 25

Thunderstorms 95°/79° 💧 0.001 in 💨 9 mph

Saturday, Sep 26Sat Sep 26

Partly cloudy 97°/78° 💧 0.075 in 💨 10 mph

Sunday, Sep 27Sun Sep 27

Light rain 97°/79° 💧 0.052 in 💨 10 mph

Monday, Sep 28Mon Sep 28

Mostly sunny 96°/80° 💧 0.066 in 💨 9 mph

Tuesday, Sep 29Tue Sep 29

Mostly sunny 97°/80° 💧 0.002 in 💨 12 mph

Wednesday, Sep 30Wed Sep 30

Mostly sunny 98°/81° 💧 None 💨 13 mph

Thursday, Oct 1Thu Oct 1

Partly cloudy 97°/81° 💧 0.084 in 💨 7 mph

Friday, Oct 2Fri Oct 2

Light rain 93°/81° 💧 0.024 in 💨 11 mph

Saturday, Oct 3Sat Oct 3

Light rain 89°/77° 💧 0.454 in 💨 6 mph

Sunday, Oct 4Sun Oct 4

Light thunderstorms 81°/76° 💧 0.765 in 💨 6 mph

Monday, Oct 5Mon Oct 5

Light rain 88°/76° 💧 0.262 in 💨 7 mph

Tuesday, Oct 6Tue Oct 6

Mostly sunny 92°/79° 💧 0.071 in 💨 11 mph

Wednesday, Oct 7Wed Oct 7

Mostly sunny 89°/79° 💧 None 💨 11 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in San Juan

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for San Juan

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 9:00 AM

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 2,7µg/m³

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

O₃ Ozone Good 36,7µg/m³

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

NO₂ Nitrogen dioxide Good 1,3µg/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 San Juan

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 7,7High 😊Good

Tomorrow UV 6,6High 🙂Fair

Friday UV 7,9High 😊Good

Saturday UV 7,5High 😊Good

Sunday UV 9,0Very high 😊Good

Monday UV 9,0Very high —Unavailable

Tuesday UV 8,0Very high —Unavailable

Hourly UV index today

9:00 AMUV 0,9 10:00 AMUV 2,6 11:00 AMUV 5,1 12:00 PMUV 7,7 1:00 PMUV 7,2 2:00 PMUV 4,3 3:00 PMUV 4,6 4:00 PMUV 3,4 5:00 PMUV 1,2 6:00 PMUV 0,5 7:00 PMUV 0,1

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

Strong UV exposure

Protect exposed skin with SPF 30+ sunscreen, wear sunglasses, and try to limit direct midday sun.

Good air quality

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

Stay hydrated

Drink water regularly, especially during physical activity or prolonged sun exposure. High humidity can make it feel hotter.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for San Juan

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · SAN JUAN, TEXAS

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 6:00 AM–7:00 AM.

93/100Best-hour score

BEST TIME TONIGHT 6:00 AM–7:00 AM Astronomical darkness: 8:44 PM–6:05 AM

☁ Cloud cover 10% Real hourly forecast for the best viewing hour.

☾ Moonlight 95% Waxing Gibbous · Moon below the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant 70° 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 min72%

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

SEP 20–NOV 20

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

ACTIVE NOW

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

NOV 6–NOV 30

LeonidsStart NOV 6 · Peak NOV 17 · End NOV 30 · ZHR 15 · 52% 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 San Juan were last refreshed today at 7:30 AM. The current forecast period extends through 25/09/2026 at 6:00 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.