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Current weather in Union is overcast clouds.

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

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

Now · 5:18 AM

Union Weather & Hourly Forecast

United States · South Carolina · 29379

65°F

Overcast night

Feels like: 65°F

💧 Humidity 93% 🌡 Pressure 30.12 inHg 💨 Wind 9 mph 👁 Visibility 8.2 mi ☁ Clouds 100% ☀️ UV index 0.0 · Low 🌅 Sunrise 7:14 AM 🌇 Sunset 7:23 PM

Hourly Forecast for Union

Today

6:00 AM

Overcast night

65° 💧 0.003 in 💨 10 mph H 92%30.12 inHg

9:00 AM

Overcast

66° 💧 0.004 in 💨 9 mph H 87%30.18 inHg

12:00 PM

Overcast

68° 💧 0.007 in 💨 10 mph H 80%30.18 inHg

3:00 PM

Overcast

70° 💧 0.002 in 💨 9 mph H 77%30.15 inHg

6:00 PM

Overcast

71° 💧 0.001 in 💨 10 mph H 75%30.12 inHg

9:00 PM

Overcast night

69° 💧 0.001 in 💨 9 mph H 78%30.15 inHg

Tomorrow

12:00 AM

Light rain

66° 💧 0.115 in 💨 9 mph H 84%30.18 inHg

3:00 AM

Light rain

62° 💧 0.159 in 💨 8 mph H 98%30.15 inHg

6:00 AM

Light rain

61° 💧 0.046 in 💨 9 mph H 98%30.15 inHg

9:00 AM

Light rain

60° 💧 0.020 in 💨 10 mph H 97%30.21 inHg

12:00 PM

Light rain

62° 💧 0.018 in 💨 9 mph H 90%30.21 inHg

3:00 PM

Overcast

67° 💧 0.001 in 💨 11 mph H 71%30.15 inHg

6:00 PM

Overcast

67° 💧 None 💨 10 mph H 69%30.12 inHg

9:00 PM

Clear night

62° 💧 None 💨 8 mph H 77%30.18 inHg

Friday

12:00 AM

Clear night

59° 💧 None 💨 7 mph H 81%30.18 inHg

3:00 AM

Clear night

57° 💧 None 💨 7 mph H 82%30.15 inHg

Today

6:00 AM

Overcast night

65° 💧 0.001 in 💨 10 mph H 92%30.12 inHg

7:00 AM

Overcast night

65° 💧 0.001 in 💨 9 mph H 90%30.15 inHg

8:00 AM

Overcast

65° 💧 0.001 in 💨 9 mph H 89%30.18 inHg

9:00 AM

Overcast

66° 💧 0.001 in 💨 9 mph H 87%30.18 inHg

10:00 AM

Overcast

66° 💧 0.002 in 💨 10 mph H 85%30.18 inHg

11:00 AM

Overcast

67° 💧 0.001 in 💨 10 mph H 83%30.21 inHg

12:00 PM

Overcast

68° 💧 0.002 in 💨 10 mph H 80%30.18 inHg

1:00 PM

Overcast

68° 💧 0.003 in 💨 10 mph H 79%30.18 inHg

2:00 PM

Overcast

69° 💧 0.002 in 💨 9 mph H 79%30.18 inHg

3:00 PM

Overcast

70° 💧 0.001 in 💨 9 mph H 77%30.15 inHg

4:00 PM

Overcast

71° 💧 0.001 in 💨 10 mph H 75%30.12 inHg

5:00 PM

Overcast

71° 💧 None 💨 10 mph H 75%30.12 inHg

6:00 PM

Overcast

71° 💧 None 💨 10 mph H 75%30.12 inHg

7:00 PM

Overcast

71° 💧 None 💨 9 mph H 76%30.12 inHg

8:00 PM

Overcast night

70° 💧 0.001 in 💨 9 mph H 77%30.15 inHg

9:00 PM

Overcast night

69° 💧 None 💨 9 mph H 78%30.15 inHg

10:00 PM

Overcast night

68° 💧 None 💨 10 mph H 78%30.18 inHg

11:00 PM

Overcast night

67° 💧 0.001 in 💨 10 mph H 79%30.18 inHg

Tomorrow

12:00 AM

Light rain

66° 💧 0.011 in 💨 9 mph H 84%30.18 inHg

1:00 AM

Light rain

64° 💧 0.041 in 💨 9 mph H 93%30.15 inHg

2:00 AM

Light rain

62° 💧 0.062 in 💨 8 mph H 98%30.15 inHg

3:00 AM

Light rain

62° 💧 0.032 in 💨 8 mph H 98%30.15 inHg

4:00 AM

Light rain

62° 💧 0.073 in 💨 8 mph H 99%30.15 inHg

5:00 AM

Light rain

61° 💧 0.053 in 💨 10 mph H 99%30.15 inHg

6:00 AM

Light rain

61° 💧 0.007 in 💨 9 mph H 98%30.15 inHg

7:00 AM

Overcast night

60° 💧 0.002 in 💨 10 mph H 98%30.18 inHg

8:00 AM

Light rain

60° 💧 0.037 in 💨 10 mph H 98%30.18 inHg

9:00 AM

Light rain

60° 💧 0.006 in 💨 10 mph H 97%30.21 inHg

10:00 AM

Light rain

62° 💧 0.004 in 💨 12 mph H 92%30.21 inHg

11:00 AM

Light rain

62° 💧 0.010 in 💨 12 mph H 91%30.21 inHg

12:00 PM

Light rain

62° 💧 0.013 in 💨 9 mph H 90%30.21 inHg

1:00 PM

Overcast

63° 💧 0.004 in 💨 11 mph H 84%30.18 inHg

2:00 PM

Overcast

65° 💧 0.002 in 💨 11 mph H 76%30.18 inHg

3:00 PM

Overcast

67° 💧 0.001 in 💨 11 mph H 71%30.15 inHg

4:00 PM

Overcast

68° 💧 None 💨 11 mph H 69%30.12 inHg

5:00 PM

Overcast

67° 💧 None 💨 10 mph H 69%30.12 inHg

6:00 PM

Overcast

67° 💧 None 💨 10 mph H 69%30.12 inHg

7:00 PM

Overcast

65° 💧 None 💨 10 mph H 71%30.15 inHg

8:00 PM

Partly cloudy night

64° 💧 None 💨 8 mph H 74%30.15 inHg

9:00 PM

Clear night

62° 💧 None 💨 8 mph H 77%30.18 inHg

10:00 PM

Clear night

60° 💧 None 💨 8 mph H 79%30.18 inHg

11:00 PM

Mostly clear night

60° 💧 None 💨 8 mph H 80%30.18 inHg

Friday

12:00 AM

Clear night

59° 💧 None 💨 7 mph H 81%30.18 inHg

1:00 AM

Clear night

58° 💧 None 💨 6 mph H 83%30.15 inHg

2:00 AM

Clear night

57° 💧 None 💨 7 mph H 83%30.15 inHg

3:00 AM

Clear night

57° 💧 None 💨 7 mph H 82%30.15 inHg

4:00 AM

Clear night

56° 💧 None 💨 8 mph H 81%30.15 inHg

5:00 AM

Clear night

56° 💧 None 💨 8 mph H 81%30.15 inHg

6:00 AM

Clear night

55° 💧 None 💨 8 mph H 81%30.15 inHg

7:00 AM

Clear night

55° 💧 None 💨 8 mph H 82%30.18 inHg

8:00 AM

Sunny

55° 💧 None 💨 8 mph H 80%30.18 inHg

9:00 AM

Sunny

58° 💧 None 💨 9 mph H 73%30.18 inHg

10:00 AM

Sunny

61° 💧 None 💨 9 mph H 66%30.18 inHg

11:00 AM

Sunny

63° 💧 None 💨 10 mph H 60%30.18 inHg

12:00 PM

Sunny

65° 💧 None 💨 9 mph H 56%30.18 inHg

1:00 PM

Sunny

67° 💧 None 💨 8 mph H 55%30.15 inHg

2:00 PM

Sunny

69° 💧 None 💨 8 mph H 52%30.12 inHg

3:00 PM

Sunny

70° 💧 None 💨 8 mph H 50%30.09 inHg

4:00 PM

Sunny

70° 💧 None 💨 8 mph H 49%30.06 inHg

5:00 PM

Sunny

70° 💧 None 💨 8 mph H 50%30.06 inHg

6:00 PM

Sunny

69° 💧 None 💨 7 mph H 53%30.06 inHg

7:00 PM

Sunny

65° 💧 None 💨 6 mph H 61%30.06 inHg

8:00 PM

Clear night

61° 💧 None 💨 6 mph H 65%30.06 inHg

11:00 PM

Clear night

57° 💧 None 💨 5 mph H 70%30.12 inHg

Saturday

2:00 AM

Clear night

55° 💧 None 💨 6 mph H 76%30.12 inHg

5:00 AM

Mostly clear night

54° 💧 None 💨 7 mph H 74%30.12 inHg

8:00 AM

Sunny

54° 💧 None 💨 6 mph H 71%30.15 inHg

11:00 AM

Sunny

68° 💧 None 💨 9 mph H 47%30.15 inHg

2:00 PM

Partly cloudy

73° 💧 None 💨 7 mph H 40%30.09 inHg

5:00 PM

Mostly sunny

74° 💧 None 💨 7 mph H 38%30.06 inHg

8:00 PM

Mostly clear night

62° 💧 None 💨 4 mph H 66%30.06 inHg

11:00 PM

Partly cloudy night

57° 💧 None 💨 4 mph H 75%30.09 inHg

Sunday

2:00 AM

Mostly cloudy night

53° 💧 None 💨 3 mph H 88%30.06 inHg

5:00 AM

Mostly clear night

51° 💧 None 💨 4 mph H 92%30.03 inHg

8:00 AM

Mostly cloudy

52° 💧 None 💨 3 mph H 93%30.06 inHg

11:00 AM

Mostly sunny

71° 💧 None 💨 4 mph H 45%30.06 inHg

2:00 PM

Mostly sunny

77° 💧 None 💨 6 mph H 36%29.97 inHg

5:00 PM

Mostly sunny

78° 💧 None 💨 5 mph H 33%29.94 inHg

8:00 PM

Mostly clear night

65° 💧 None 💨 4 mph H 55%29.94 inHg

11:00 PM

Mostly clear night

61° 💧 None 💨 0 mph H 66%29.97 inHg

Monday

2:00 AM

Clear night

55° 💧 None 💨 3 mph H 87%29.97 inHg

5:00 AM

Clear night

54° 💧 None 💨 4 mph H 87%29.97 inHg

8:00 AM

Sunny

55° 💧 None 💨 3 mph H 89%30.00 inHg

11:00 AM

Sunny

73° 💧 None 💨 2 mph H 50%30.00 inHg

2:00 PM

Sunny

80° 💧 None 💨 4 mph H 36%29.94 inHg

5:00 PM

Sunny

82° 💧 None 💨 3 mph H 32%29.91 inHg

8:00 PM

Clear night

68° 💧 None 💨 3 mph H 58%29.91 inHg

Tuesday

2:00 AM

Clear night

60° 💧 None 💨 5 mph H 80%29.97 inHg

8:00 AM

Sunny

61° 💧 None 💨 3 mph H 85%30.03 inHg

2:00 PM

Mostly sunny

83° 💧 None 💨 7 mph H 53%29.97 inHg

8:00 PM

Mostly clear night

69° 💧 None 💨 2 mph H 98%29.97 inHg

Wednesday

2:00 AM

Clear night

65° 💧 None 💨 6 mph H 98%30.00 inHg

8:00 AM

Sunny

64° 💧 None 💨 5 mph H 92%30.03 inHg

2:00 PM

Mostly sunny

84° 💧 None 💨 8 mph H 40%29.97 inHg

8:00 PM

Mostly clear night

76° 💧 None 💨 8 mph H 58%29.91 inHg

Thursday

2:00 AM

Mostly cloudy night

73° 💧 None 💨 10 mph H 83%29.91 inHg

8:00 AM

Light rain

72° 💧 None 💨 9 mph H 95%29.85 inHg

2:00 PM

Light rain

73° 💧 None 💨 10 mph H 98%29.85 inHg

8:00 PM

Light rain

72° 💧 None 💨 5 mph H 99%29.83 inHg

Friday

2:00 AM

Overcast night

70° 💧 None 💨 4 mph H 100%29.85 inHg

8:00 AM

Mostly sunny

65° 💧 None 💨 5 mph H 99%29.88 inHg

2:00 PM

Mostly sunny

80° 💧 None 💨 5 mph H 52%29.88 inHg

8:00 PM

Clear night

69° 💧 None 💨 9 mph H 52%29.91 inHg

Saturday

2:00 AM

Clear night

61° 💧 None 💨 6 mph H 63%30.00 inHg

8:00 AM

Mostly sunny

57° 💧 None 💨 7 mph H 71%30.09 inHg

2:00 PM

Sunny

72° 💧 None 💨 7 mph H 43%30.12 inHg

8:00 PM

Clear night

62° 💧 None 💨 6 mph H 65%30.09 inHg

Sunday

2:00 AM

Clear night

55° 💧 None 💨 5 mph H 81%30.15 inHg

8:00 AM

Sunny

54° 💧 None 💨 7 mph H 82%30.24 inHg

2:00 PM

Sunny

72° 💧 None 💨 6 mph H 45%30.21 inHg

8:00 PM

Partly cloudy night

63° 💧 None 💨 4 mph H 68%30.18 inHg

Monday

2:00 AM

Mostly cloudy night

56° 💧 None 💨 4 mph H 82%30.18 inHg

8:00 AM

Partly cloudy

55° 💧 None 💨 5 mph H 88%30.21 inHg

2:00 PM

Overcast

73° 💧 None 💨 4 mph H 48%30.18 inHg

8:00 PM

Clear night

64° 💧 None 💨 4 mph H 70%30.15 inHg

Tuesday

2:00 AM

Clear night

56° 💧 None 💨 2 mph H 89%30.15 inHg

8:00 AM

Sunny

54° 💧 None 💨 4 mph H 92%30.15 inHg

2:00 PM

Sunny

78° 💧 None 💨 1 mph H 44%30.09 inHg

8:00 PM

Clear night

67° 💧 None 💨 4 mph H 66%30.03 inHg

Wednesday

2:00 AM

Clear night

60° 💧 None 💨 5 mph H 84%29.97 inHg

8:00 AM

Sunny

59° 💧 None 💨 6 mph H 90%29.94 inHg

2:00 PM

Sunny

84° 💧 None 💨 4 mph H 38%29.85 inHg

8:00 PM

Clear night

71° 💧 None 💨 8 mph H 53%29.83 inHg

In Union and, more broadly, across the state of South Carolina: This morning, clear skies and warm temperatures will set the tone, with lows around 72 degrees and light southeast winds at up to 4 mph. As the day progresses, temperatures will rise into the upper 80s and low 90s, creating hot conditions. The wind will remain gentle, with occasional gusts reaching 12 mph. An isolated shower is unlikely but cannot be entirely ruled out, with a maximum probability of 25%. Overall, expect a hot and dry day, with plenty of sunshine and light breezes.

15-Day Weather Outlook for Union

TomorrowTomorrow

Overcast 68°/60° 💧 None 💨 12 mph

Friday, Sep 25Fri Sep 25

Sunny 70°/55° 💧 0.461 in 💨 10 mph

Saturday, Sep 26Sat Sep 26

Mostly sunny 74°/54° 💧 None 💨 9 mph

Sunday, Sep 27Sun Sep 27

Mostly cloudy 78°/51° 💧 None 💨 6 mph

Monday, Sep 28Mon Sep 28

Sunny 82°/54° 💧 None 💨 4 mph

Tuesday, Sep 29Tue Sep 29

Mostly sunny 83°/60° 💧 0.096 in 💨 7 mph

Wednesday, Sep 30Wed Sep 30

Mostly sunny 84°/64° 💧 None 💨 8 mph

Thursday, Oct 1Thu Oct 1

Light rain 73°/72° 💧 0.669 in 💨 10 mph

Friday, Oct 2Fri Oct 2

Overcast 80°/65° 💧 0.013 in 💨 9 mph

Saturday, Oct 3Sat Oct 3

Mostly sunny 72°/57° 💧 None 💨 7 mph

Sunday, Oct 4Sun Oct 4

Partly cloudy 72°/54° 💧 None 💨 7 mph

Monday, Oct 5Mon Oct 5

Mostly cloudy 73°/55° 💧 None 💨 5 mph

Tuesday, Oct 6Tue Oct 6

Sunny 78°/54° 💧 None 💨 4 mph

Wednesday, Oct 7Wed Oct 7

Sunny 84°/59° 💧 None 💨 8 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

Good

Nearest forecast value 6:00 AM

PM2.5 Fine particles Good 3,8µg/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 4,1µg/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 2,3µg/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 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 1,2Low 😊Good

Tomorrow UV 4,9Moderate 😊Good

Friday UV 7,0High 😐Moderate

Saturday UV 6,8High 😐Moderate

Sunday UV 7,0High 😊Good

Monday UV 7,0High —Unavailable

Tuesday UV 7,0High —Unavailable

Hourly UV index today

7:00 AMUV 0,0 8:00 AMUV 0,0 9:00 AMUV 0,2 10:00 AMUV 0,3 11:00 AMUV 0,6 12:00 PMUV 0,8 1:00 PMUV 1,0 2:00 PMUV 1,2 3:00 PMUV 1,2 4:00 PMUV 0,8 5:00 PMUV 0,4 6:00 PMUV 0,2

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

Low UV risk

UV radiation will be low, although basic protection is still advisable during prolonged exposure.

Good air quality

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

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

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 Union

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · UNION, SOUTH CAROLINA

Tonight's Stargazing & Shooting Stars

Local night-sky conditions and meteor activity for Jasper.

24/100Best-hour score

No good viewing window tonight Astronomical darkness exists, but current sky conditions are unfavorable.

☁ Cloud cover 100% Real hourly forecast for the best viewing hour.

☾ Moonlight 89% Waxing Gibbous · Moon below the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant 64° high at the best hour.

✦ Estimated visible meteors Poor visibility Meteor activity may occur above the clouds, but local viewing conditions are not suitable.

Chance ≥1 meteor in 30 minNot meaningful

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 Union were last refreshed today at 5:18 AM. The current forecast period extends through 25/09/2026 at 3:00 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.