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Current weather in Union is scattered clouds.

Where can I find the hourly weather forecast for Union?

This page shows hourly weather forecast for Union, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for Union updated regularly?

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

Now · 12:28 PM

Union Weather & Hourly Forecast

United States · South Carolina · 29379

84°F

Partly cloudy

Feels like: 87°F

💧 Humidity 50% 🌡 Pressure 30.27 inHg 💨 Wind 1 mph 👁 Visibility 25.9 mi ☁ Clouds 60% ☀️ UV index 7.1 · High 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Union

Today

1:00 PM

Mostly sunny

86° 💧 None 💨 1 mph H 45%30.24 inHg

4:00 PM

Sunny

89° 💧 None 💨 2 mph H 38%30.15 inHg

7:00 PM

Sunny

85° 💧 None 💨 2 mph H 50%30.09 inHg

10:00 PM

Mostly cloudy night

77° 💧 None 💨 6 mph H 57%30.15 inHg

Tomorrow

1:00 AM

Clear night

73° 💧 None 💨 6 mph H 81%30.15 inHg

4:00 AM

Clear night

71° 💧 None 💨 4 mph H 96%30.09 inHg

7:00 AM

Clear night

70° 💧 None 💨 3 mph H 99%30.09 inHg

10:00 AM

Partly cloudy

81° 💧 0.001 in 💨 5 mph H 73%30.09 inHg

1:00 PM

Mostly sunny

89° 💧 0.002 in 💨 4 mph H 55%30.06 inHg

4:00 PM

Overcast

90° 💧 0.015 in 💨 6 mph H 50%29.94 inHg

7:00 PM

Light rain

85° 💧 0.007 in 💨 6 mph H 65%29.91 inHg

10:00 PM

Clear night

79° 💧 0.037 in 💨 5 mph H 79%29.97 inHg

Friday

1:00 AM

Light rain

74° 💧 0.008 in 💨 7 mph H 94%29.97 inHg

4:00 AM

Overcast night

74° 💧 None 💨 4 mph H 97%29.94 inHg

7:00 AM

Mostly cloudy night

73° 💧 None 💨 5 mph H 98%29.97 inHg

10:00 AM

Partly cloudy

81° 💧 None 💨 5 mph H 80%29.97 inHg

Today

1:00 PM

Mostly sunny

86° 💧 None 💨 1 mph H 45%30.24 inHg

2:00 PM

Mostly sunny

88° 💧 None 💨 1 mph H 42%30.21 inHg

3:00 PM

Mostly sunny

89° 💧 None 💨 1 mph H 39%30.18 inHg

4:00 PM

Sunny

89° 💧 None 💨 2 mph H 38%30.15 inHg

5:00 PM

Mostly sunny

90° 💧 None 💨 2 mph H 37%30.12 inHg

6:00 PM

Sunny

89° 💧 None 💨 3 mph H 39%30.09 inHg

7:00 PM

Sunny

85° 💧 None 💨 2 mph H 50%30.09 inHg

8:00 PM

Clear night

79° 💧 None 💨 5 mph H 59%30.09 inHg

9:00 PM

Mostly cloudy night

78° 💧 None 💨 6 mph H 57%30.12 inHg

10:00 PM

Mostly cloudy night

77° 💧 None 💨 6 mph H 57%30.15 inHg

11:00 PM

Mostly cloudy night

75° 💧 None 💨 6 mph H 61%30.15 inHg

Tomorrow

12:00 AM

Mostly clear night

74° 💧 None 💨 8 mph H 67%30.15 inHg

1:00 AM

Clear night

73° 💧 None 💨 6 mph H 81%30.15 inHg

2:00 AM

Clear night

72° 💧 None 💨 4 mph H 91%30.12 inHg

3:00 AM

Mostly clear night

71° 💧 None 💨 3 mph H 94%30.12 inHg

4:00 AM

Clear night

71° 💧 None 💨 4 mph H 96%30.09 inHg

5:00 AM

Clear night

70° 💧 None 💨 3 mph H 97%30.09 inHg

6:00 AM

Clear night

70° 💧 None 💨 3 mph H 98%30.09 inHg

7:00 AM

Clear night

70° 💧 None 💨 3 mph H 99%30.09 inHg

8:00 AM

Sunny

72° 💧 None 💨 4 mph H 96%30.12 inHg

9:00 AM

Mostly sunny

77° 💧 None 💨 4 mph H 85%30.09 inHg

10:00 AM

Partly cloudy

81° 💧 None 💨 5 mph H 73%30.09 inHg

11:00 AM

Mostly sunny

84° 💧 0.000 in 💨 4 mph H 65%30.09 inHg

12:00 PM

Sunny

87° 💧 0.001 in 💨 4 mph H 59%30.09 inHg

1:00 PM

Mostly sunny

89° 💧 0.001 in 💨 4 mph H 55%30.06 inHg

2:00 PM

Mostly sunny

90° 💧 0.001 in 💨 5 mph H 52%30.03 inHg

3:00 PM

Overcast

91° 💧 0.001 in 💨 6 mph H 50%30.00 inHg

4:00 PM

Overcast

90° 💧 None 💨 6 mph H 50%29.94 inHg

5:00 PM

Mostly cloudy

90° 💧 0.000 in 💨 6 mph H 51%29.94 inHg

6:00 PM

Light rain

88° 💧 0.015 in 💨 6 mph H 57%29.91 inHg

7:00 PM

Light rain

85° 💧 0.007 in 💨 6 mph H 65%29.91 inHg

8:00 PM

Clear night

82° 💧 None 💨 6 mph H 71%29.91 inHg

9:00 PM

Clear night

80° 💧 None 💨 5 mph H 75%29.94 inHg

10:00 PM

Clear night

79° 💧 None 💨 5 mph H 79%29.97 inHg

11:00 PM

Partly cloudy night

78° 💧 0.000 in 💨 5 mph H 83%29.97 inHg

Friday

12:00 AM

Light rain

75° 💧 0.037 in 💨 7 mph H 92%29.97 inHg

1:00 AM

Light rain

74° 💧 0.007 in 💨 7 mph H 94%29.97 inHg

2:00 AM

Mostly clear night

74° 💧 0.001 in 💨 8 mph H 95%29.94 inHg

3:00 AM

Mostly clear night

74° 💧 None 💨 6 mph H 96%29.94 inHg

4:00 AM

Overcast night

74° 💧 None 💨 4 mph H 97%29.94 inHg

5:00 AM

Mostly cloudy night

73° 💧 None 💨 4 mph H 97%29.94 inHg

6:00 AM

Overcast night

73° 💧 None 💨 4 mph H 98%29.97 inHg

7:00 AM

Mostly cloudy night

73° 💧 None 💨 5 mph H 98%29.97 inHg

8:00 AM

Mostly cloudy

74° 💧 None 💨 5 mph H 96%29.97 inHg

9:00 AM

Mostly sunny

77° 💧 None 💨 4 mph H 90%29.97 inHg

10:00 AM

Partly cloudy

81° 💧 None 💨 5 mph H 80%29.97 inHg

11:00 AM

Partly cloudy

86° 💧 None 💨 5 mph H 67%29.97 inHg

12:00 PM

Mostly sunny

90° 💧 None 💨 3 mph H 53%29.97 inHg

1:00 PM

Strong thunderstorm

92° 💧 0.001 in 💨 3 mph H 45%29.94 inHg

2:00 PM

Partly cloudy

94° 💧 None 💨 4 mph H 42%29.91 inHg

3:00 PM

Mostly cloudy

95° 💧 None 💨 4 mph H 41%29.88 inHg

4:00 PM

Partly cloudy

94° 💧 0.001 in 💨 4 mph H 42%29.85 inHg

5:00 PM

Sunny

93° 💧 0.001 in 💨 3 mph H 43%29.83 inHg

6:00 PM

Light rain

84° 💧 0.016 in 💨 12 mph H 69%29.85 inHg

7:00 PM

Light thunderstorms

77° 💧 0.091 in 💨 12 mph H 94%29.94 inHg

8:00 PM

Light rain

74° 💧 0.050 in 💨 7 mph H 97%29.91 inHg

Saturday

5:00 AM

Mostly clear night

72° 💧 None 💨 2 mph H 99%29.97 inHg

8:00 AM

Mostly cloudy

73° 💧 None 💨 2 mph H 98%30.00 inHg

11:00 AM

Light rain

81° 💧 None 💨 3 mph H 78%30.03 inHg

2:00 PM

Moderate rain

76° 💧 None 💨 3 mph H 97%30.00 inHg

5:00 PM

Light rain

76° 💧 None 💨 4 mph H 97%29.97 inHg

8:00 PM

Overcast night

75° 💧 None 💨 2 mph H 99%30.00 inHg

11:00 PM

Light rain

74° 💧 None 💨 4 mph H 100%30.03 inHg

Sunday

2:00 AM

Mostly cloudy night

72° 💧 None 💨 5 mph H 100%30.03 inHg

5:00 AM

Overcast night

72° 💧 None 💨 3 mph H 100%30.03 inHg

8:00 AM

Mostly cloudy

73° 💧 None 💨 5 mph H 99%30.03 inHg

11:00 AM

Overcast

79° 💧 None 💨 5 mph H 82%30.06 inHg

2:00 PM

Mostly sunny

87° 💧 None 💨 2 mph H 62%30.03 inHg

5:00 PM

Partly cloudy

88° 💧 None 💨 3 mph H 59%29.97 inHg

8:00 PM

Mostly cloudy night

78° 💧 None 💨 2 mph H 93%30.00 inHg

11:00 PM

Mostly clear night

74° 💧 None 💨 3 mph H 99%30.06 inHg

Monday

2:00 AM

Partly cloudy night

72° 💧 None 💨 1 mph H 100%30.06 inHg

5:00 AM

Overcast night

71° 💧 None 💨 1 mph H 100%30.03 inHg

8:00 AM

Overcast

72° 💧 None 💨 2 mph H 100%30.09 inHg

11:00 AM

Mostly sunny

81° 💧 None 💨 3 mph H 80%30.12 inHg

2:00 PM

Mostly sunny

88° 💧 None 💨 3 mph H 62%30.06 inHg

5:00 PM

Mostly sunny

89° 💧 None 💨 5 mph H 59%30.00 inHg

8:00 PM

Mostly clear night

80° 💧 None 💨 8 mph H 79%30.06 inHg

11:00 PM

Clear night

75° 💧 None 💨 4 mph H 90%30.12 inHg

Tuesday

2:00 AM

Clear night

74° 💧 None 💨 1 mph H 95%30.09 inHg

8:00 AM

Sunny

75° 💧 None 💨 3 mph H 99%30.06 inHg

2:00 PM

Overcast

75° 💧 None 💨 2 mph H 99%30.12 inHg

8:00 PM

Overcast night

90° 💧 None 💨 3 mph H 58%30.06 inHg

Wednesday

2:00 AM

Mostly clear night

78° 💧 None 💨 1 mph H 96%30.06 inHg

8:00 AM

Partly cloudy

74° 💧 None 💨 1 mph H 100%30.09 inHg

2:00 PM

Mostly cloudy

73° 💧 None 💨 3 mph H 99%30.15 inHg

8:00 PM

Partly cloudy night

90° 💧 None 💨 0 mph H 57%30.09 inHg

Thursday

2:00 AM

Mostly cloudy night

81° 💧 None 💨 6 mph H 79%30.06 inHg

8:00 AM

Mostly sunny

75° 💧 None 💨 0 mph H 96%30.12 inHg

2:00 PM

Overcast

74° 💧 None 💨 3 mph H 99%30.15 inHg

8:00 PM

Partly cloudy night

91° 💧 None 💨 1 mph H 55%30.12 inHg

Friday

2:00 AM

Mostly clear night

80° 💧 None 💨 0 mph H 86%30.06 inHg

8:00 AM

Sunny

75° 💧 None 💨 2 mph H 94%30.09 inHg

2:00 PM

Mostly cloudy

74° 💧 None 💨 1 mph H 98%30.12 inHg

8:00 PM

Clear night

93° 💧 None 💨 2 mph H 49%30.03 inHg

Saturday

2:00 AM

Clear night

84° 💧 None 💨 4 mph H 64%29.97 inHg

8:00 AM

Sunny

78° 💧 None 💨 4 mph H 81%29.97 inHg

2:00 PM

Sunny

76° 💧 None 💨 4 mph H 86%29.97 inHg

8:00 PM

Mostly clear night

96° 💧 None 💨 2 mph H 40%29.94 inHg

Sunday

2:00 AM

Clear night

86° 💧 None 💨 6 mph H 55%29.88 inHg

8:00 AM

Sunny

79° 💧 None 💨 6 mph H 71%29.91 inHg

2:00 PM

Sunny

77° 💧 None 💨 6 mph H 83%29.97 inHg

8:00 PM

Mostly clear night

96° 💧 None 💨 8 mph H 40%29.91 inHg

Monday

2:00 AM

Clear night

87° 💧 None 💨 6 mph H 54%29.91 inHg

8:00 AM

Sunny

80° 💧 None 💨 6 mph H 71%29.97 inHg

2:00 PM

Sunny

78° 💧 None 💨 6 mph H 82%30.00 inHg

8:00 PM

Mostly clear night

96° 💧 None 💨 7 mph H 42%29.97 inHg

Tuesday

2:00 AM

Clear night

86° 💧 None 💨 6 mph H 61%29.97 inHg

8:00 AM

Sunny

78° 💧 None 💨 6 mph H 71%30.06 inHg

2:00 PM

Sunny

76° 💧 None 💨 5 mph H 82%30.09 inHg

8:00 PM

Clear night

96° 💧 None 💨 5 mph H 40%30.06 inHg

Wednesday

2:00 AM

Mostly clear night

87° 💧 None 💨 3 mph H 57%30.03 inHg

8:00 AM

Sunny

79° 💧 None 💨 5 mph H 77%30.09 inHg

2:00 PM

Sunny

77° 💧 None 💨 5 mph H 89%30.12 inHg

8:00 PM

Clear night

97° 💧 None 💨 4 mph H 40%30.03 inHg

Thursday

2:00 AM

Clear night

87° 💧 None 💨 5 mph H 53%29.97 inHg

In Union and, more broadly, across the state of South Carolina: The afternoon will feature a mix of sun and clouds, with temperatures warming up to the high 70s to low 80s. Winds will be light from the south, with maximum speeds of around 9 mph and occasional gusts reaching 18 mph. No rain is expected for the rest of the day, so outdoor plans should be comfortable. Humidity levels will likely stay moderate, contributing to the warm but manageable conditions. Be sure to stay hydrated if you're spending time outside, especially during the peak afternoon hours. Overall, it looks like a warm day with pleasant breezes and stable weather conditions.

15-Day Weather Outlook for Union

TomorrowTomorrow

Mostly cloudy 91°/70° 💧 None 💨 8 mph

Friday, Sep 11Fri Sep 11

Strong thunderstorm 95°/73° 💧 None 💨 12 mph

Saturday, Sep 12Sat Sep 12

Moderate rain 81°/72° 💧 0.895 in 💨 7 mph

Sunday, Sep 13Sun Sep 13

Light rain 88°/72° 💧 0.123 in 💨 5 mph

Monday, Sep 14Mon Sep 14

Mostly sunny 89°/71° 💧 0.126 in 💨 5 mph

Tuesday, Sep 15Tue Sep 15

Mostly sunny 80°/74° 💧 0.007 in 💨 8 mph

Wednesday, Sep 16Wed Sep 16

Mostly sunny 90°/73° 💧 0.103 in 💨 3 mph

Thursday, Sep 17Thu Sep 17

Partly cloudy 90°/74° 💧 0.055 in 💨 6 mph

Friday, Sep 18Fri Sep 18

Partly cloudy 91°/74° 💧 0.038 in 💨 2 mph

Saturday, Sep 19Sat Sep 19

Sunny 93°/76° 💧 0.003 in 💨 4 mph

Sunday, Sep 20Sun Sep 20

Mostly sunny 96°/77° 💧 0.001 in 💨 6 mph

Monday, Sep 21Mon Sep 21

Mostly sunny 96°/78° 💧 None 💨 8 mph

Tuesday, Sep 22Tue Sep 22

Mostly sunny 96°/76° 💧 0.020 in 💨 7 mph

Wednesday, Sep 23Wed Sep 23

Mostly sunny 96°/77° 💧 0.010 in 💨 5 mph

Thursday, Sep 24Thu Sep 24

Sunny 97°/87° 💧 None 💨 5 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Union

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Union

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 1:00 PM

PM2.5 Fine particles Good 3,0µg/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 6,5µg/m³

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

O₃ Ozone Fair 90,6µg/m³

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

NO₂ Nitrogen dioxide Good 1,0µg/m³

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

Air quality is acceptable for most people.

UV & HEALTH

UV, Sun & Health Outlook in Union

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 8,4Very high 🙂Fair

Tomorrow UV 8,3Very high 🙂Fair

Friday UV 7,8High 🙂Fair

Saturday UV 8,1Very high 😊Good

Sunday UV 8,0Very high 😊Good

Monday UV 9,0Very high —Unavailable

Tuesday UV 9,0Very high —Unavailable

Hourly UV index today

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

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.

Acceptable air quality

Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.

Stay hydrated

Drink water regularly, especially during physical activity or prolonged sun exposure.

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 Union

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · UNION, SOUTH CAROLINA

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 5:00 AM–6:00 AM.

94/100Best-hour score

BEST TIME TONIGHT 5:00 AM–6:00 AM Astronomical darkness: 9:08 PM–5:40 AM

☁ Cloud cover 1% Real hourly forecast for the best viewing hour.

☾ Moonlight 2% New Moon · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 83° high at the best hour.

✦ Estimated visible meteors 2–5/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min79%

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 Union were last refreshed today at 12:28 PM. The current forecast period extends through 11/09/2026 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.