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Current weather in Belfast is few clouds.

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

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

Now · 12:24 PM

Belfast Weather & Hourly Forecast

United States · Pennsylvania · 18064

79°F

Mostly sunny

Feels like: 80°F

💧 Humidity 63% 🌡 Pressure 30.15 inHg 💨 Wind 7 mph 👁 Visibility 22.4 mi ☁ Clouds 23% ☀️ UV index 6.5 · High 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Belfast

Today

1:00 PM

Mostly cloudy

81° 💧 0.000 in 💨 10 mph H 58%30.12 inHg

4:00 PM

Mostly sunny

83° 💧 None 💨 10 mph H 52%30.03 inHg

7:00 PM

Mostly cloudy

79° 💧 None 💨 11 mph H 60%30.00 inHg

10:00 PM

Clear night

75° 💧 None 💨 12 mph H 67%30.00 inHg

Tomorrow

1:00 AM

Mostly cloudy night

74° 💧 None 💨 12 mph H 70%29.94 inHg

4:00 AM

Overcast night

72° 💧 0.077 in 💨 9 mph H 69%29.91 inHg

7:00 AM

Light rain

68° 💧 0.005 in 💨 8 mph H 88%29.91 inHg

10:00 AM

Mostly cloudy

75° 💧 0.001 in 💨 6 mph H 82%29.91 inHg

1:00 PM

Overcast

81° 💧 0.000 in 💨 8 mph H 63%29.88 inHg

4:00 PM

Partly cloudy

81° 💧 None 💨 8 mph H 56%29.83 inHg

7:00 PM

Overcast

76° 💧 None 💨 5 mph H 72%29.83 inHg

10:00 PM

Overcast night

72° 💧 None 💨 3 mph H 79%29.85 inHg

Friday

1:00 AM

Overcast night

70° 💧 None 💨 7 mph H 83%29.88 inHg

4:00 AM

Mostly cloudy night

67° 💧 None 💨 6 mph H 72%29.91 inHg

7:00 AM

Partly cloudy

61° 💧 None 💨 5 mph H 80%29.97 inHg

10:00 AM

Mostly sunny

69° 💧 None 💨 7 mph H 56%30.00 inHg

Today

1:00 PM

Mostly cloudy

81° 💧 None 💨 10 mph H 58%30.12 inHg

2:00 PM

Mostly cloudy

82° 💧 0.000 in 💨 11 mph H 52%30.09 inHg

3:00 PM

Mostly cloudy

83° 💧 None 💨 11 mph H 52%30.06 inHg

4:00 PM

Mostly sunny

83° 💧 None 💨 10 mph H 52%30.03 inHg

5:00 PM

Partly cloudy

84° 💧 None 💨 9 mph H 51%30.03 inHg

6:00 PM

Partly cloudy

82° 💧 None 💨 8 mph H 57%30.00 inHg

7:00 PM

Mostly cloudy

79° 💧 None 💨 11 mph H 60%30.00 inHg

8:00 PM

Partly cloudy night

77° 💧 None 💨 11 mph H 63%29.97 inHg

9:00 PM

Clear night

76° 💧 None 💨 11 mph H 64%30.00 inHg

10:00 PM

Clear night

75° 💧 None 💨 12 mph H 67%30.00 inHg

11:00 PM

Partly cloudy night

74° 💧 None 💨 11 mph H 70%30.00 inHg

Tomorrow

12:00 AM

Mostly cloudy night

73° 💧 None 💨 11 mph H 71%29.97 inHg

1:00 AM

Mostly cloudy night

74° 💧 None 💨 12 mph H 70%29.94 inHg

2:00 AM

Overcast night

73° 💧 None 💨 12 mph H 68%29.94 inHg

3:00 AM

Mostly cloudy night

73° 💧 None 💨 11 mph H 67%29.91 inHg

4:00 AM

Overcast night

72° 💧 0.001 in 💨 9 mph H 69%29.91 inHg

5:00 AM

Light rain

68° 💧 0.071 in 💨 9 mph H 87%29.91 inHg

6:00 AM

Light rain

68° 💧 0.004 in 💨 8 mph H 85%29.91 inHg

7:00 AM

Light rain

68° 💧 0.004 in 💨 8 mph H 88%29.91 inHg

8:00 AM

Partly cloudy

69° 💧 0.000 in 💨 7 mph H 88%29.91 inHg

9:00 AM

Mostly cloudy

72° 💧 0.001 in 💨 6 mph H 85%29.91 inHg

10:00 AM

Mostly cloudy

75° 💧 0.000 in 💨 6 mph H 82%29.91 inHg

11:00 AM

Overcast

79° 💧 0.000 in 💨 7 mph H 71%29.91 inHg

12:00 PM

Overcast

81° 💧 0.000 in 💨 7 mph H 66%29.88 inHg

1:00 PM

Overcast

81° 💧 None 💨 8 mph H 63%29.88 inHg

2:00 PM

Overcast

81° 💧 0.000 in 💨 8 mph H 64%29.88 inHg

3:00 PM

Mostly cloudy

80° 💧 None 💨 8 mph H 62%29.85 inHg

4:00 PM

Partly cloudy

81° 💧 None 💨 8 mph H 56%29.83 inHg

5:00 PM

Mostly cloudy

81° 💧 None 💨 8 mph H 57%29.83 inHg

6:00 PM

Overcast

78° 💧 None 💨 5 mph H 66%29.83 inHg

7:00 PM

Overcast

76° 💧 None 💨 5 mph H 72%29.83 inHg

8:00 PM

Overcast night

75° 💧 None 💨 5 mph H 74%29.83 inHg

9:00 PM

Overcast night

73° 💧 None 💨 4 mph H 77%29.85 inHg

10:00 PM

Overcast night

72° 💧 None 💨 3 mph H 79%29.85 inHg

11:00 PM

Overcast night

72° 💧 None 💨 3 mph H 81%29.85 inHg

Friday

12:00 AM

Mostly cloudy night

71° 💧 None 💨 5 mph H 82%29.85 inHg

1:00 AM

Overcast night

70° 💧 None 💨 7 mph H 83%29.88 inHg

2:00 AM

Overcast night

68° 💧 None 💨 7 mph H 84%29.88 inHg

3:00 AM

Overcast night

68° 💧 None 💨 6 mph H 75%29.88 inHg

4:00 AM

Mostly cloudy night

67° 💧 None 💨 6 mph H 72%29.91 inHg

5:00 AM

Partly cloudy night

65° 💧 None 💨 5 mph H 73%29.91 inHg

6:00 AM

Mostly clear night

63° 💧 None 💨 5 mph H 76%29.94 inHg

7:00 AM

Partly cloudy

61° 💧 None 💨 5 mph H 80%29.97 inHg

8:00 AM

Mostly sunny

64° 💧 None 💨 5 mph H 76%29.97 inHg

9:00 AM

Mostly sunny

66° 💧 None 💨 6 mph H 65%30.00 inHg

10:00 AM

Mostly sunny

69° 💧 None 💨 7 mph H 56%30.00 inHg

11:00 AM

Sunny

71° 💧 None 💨 6 mph H 49%30.00 inHg

12:00 PM

Sunny

73° 💧 None 💨 6 mph H 44%30.00 inHg

1:00 PM

Sunny

75° 💧 0.000 in 💨 6 mph H 41%29.97 inHg

2:00 PM

Sunny

76° 💧 None 💨 6 mph H 39%29.97 inHg

3:00 PM

Sunny

76° 💧 None 💨 6 mph H 38%29.97 inHg

4:00 PM

Sunny

76° 💧 None 💨 6 mph H 39%29.94 inHg

5:00 PM

Sunny

75° 💧 None 💨 6 mph H 40%29.94 inHg

6:00 PM

Sunny

73° 💧 None 💨 5 mph H 47%29.97 inHg

7:00 PM

Sunny

69° 💧 None 💨 4 mph H 60%29.97 inHg

8:00 PM

Clear night

65° 💧 None 💨 3 mph H 69%30.00 inHg

Saturday

5:00 AM

Overcast night

57° 💧 None 💨 5 mph H 88%30.09 inHg

8:00 AM

Overcast

60° 💧 None 💨 5 mph H 85%30.12 inHg

11:00 AM

Overcast

73° 💧 None 💨 4 mph H 62%30.09 inHg

2:00 PM

Overcast

79° 💧 None 💨 8 mph H 59%30.06 inHg

5:00 PM

Overcast

78° 💧 None 💨 6 mph H 65%30.00 inHg

8:00 PM

Overcast night

74° 💧 None 💨 9 mph H 68%30.03 inHg

11:00 PM

Moderate rain

67° 💧 None 💨 5 mph H 94%30.06 inHg

Sunday

2:00 AM

Light rain

67° 💧 None 💨 3 mph H 96%30.00 inHg

5:00 AM

Light rain

68° 💧 None 💨 3 mph H 98%29.97 inHg

8:00 AM

Light rain

69° 💧 None 💨 4 mph H 99%30.00 inHg

11:00 AM

Overcast

76° 💧 None 💨 6 mph H 84%30.00 inHg

2:00 PM

Light rain

81° 💧 None 💨 7 mph H 70%29.94 inHg

5:00 PM

Sunny

82° 💧 None 💨 7 mph H 62%29.91 inHg

8:00 PM

Clear night

75° 💧 None 💨 5 mph H 79%29.97 inHg

11:00 PM

Partly cloudy night

73° 💧 None 💨 9 mph H 82%30.03 inHg

Monday

2:00 AM

Mostly clear night

67° 💧 None 💨 6 mph H 86%30.06 inHg

5:00 AM

Partly cloudy night

61° 💧 None 💨 5 mph H 75%30.06 inHg

8:00 AM

Partly cloudy

63° 💧 None 💨 5 mph H 76%30.15 inHg

11:00 AM

Mostly sunny

72° 💧 None 💨 1 mph H 65%30.15 inHg

2:00 PM

Mostly sunny

77° 💧 None 💨 4 mph H 61%30.12 inHg

5:00 PM

Partly cloudy

78° 💧 None 💨 4 mph H 55%30.12 inHg

8:00 PM

Partly cloudy night

71° 💧 None 💨 2 mph H 73%30.12 inHg

11:00 PM

Mostly cloudy night

67° 💧 None 💨 1 mph H 80%30.15 inHg

Tuesday

2:00 AM

Clear night

64° 💧 None 💨 3 mph H 81%30.15 inHg

8:00 AM

Partly cloudy

70° 💧 None 💨 3 mph H 98%30.12 inHg

2:00 PM

Overcast

70° 💧 None 💨 6 mph H 98%30.15 inHg

8:00 PM

Mostly cloudy night

83° 💧 None 💨 10 mph H 63%30.09 inHg

Wednesday

2:00 AM

Mostly clear night

77° 💧 None 💨 7 mph H 76%30.06 inHg

8:00 AM

Sunny

72° 💧 None 💨 4 mph H 97%30.09 inHg

2:00 PM

Mostly sunny

73° 💧 None 💨 6 mph H 90%30.15 inHg

8:00 PM

Light rain

75° 💧 None 💨 10 mph H 80%30.18 inHg

Thursday

2:00 AM

Moderate rain

67° 💧 None 💨 8 mph H 92%30.21 inHg

8:00 AM

Overcast

65° 💧 None 💨 7 mph H 96%30.24 inHg

2:00 PM

Overcast

62° 💧 None 💨 8 mph H 74%30.27 inHg

8:00 PM

Overcast night

70° 💧 None 💨 6 mph H 62%30.24 inHg

Friday

2:00 AM

Mostly clear night

65° 💧 None 💨 4 mph H 81%30.21 inHg

8:00 AM

Mostly cloudy

64° 💧 None 💨 2 mph H 87%30.15 inHg

2:00 PM

Overcast

64° 💧 None 💨 3 mph H 90%30.09 inHg

8:00 PM

Partly cloudy night

75° 💧 None 💨 11 mph H 73%29.94 inHg

Saturday

2:00 AM

Mostly clear night

74° 💧 None 💨 6 mph H 77%29.85 inHg

8:00 AM

Sunny

67° 💧 None 💨 8 mph H 82%29.88 inHg

2:00 PM

Mostly sunny

60° 💧 None 💨 8 mph H 76%29.97 inHg

8:00 PM

Partly cloudy night

70° 💧 None 💨 7 mph H 42%29.94 inHg

Sunday

2:00 AM

Mostly clear night

60° 💧 None 💨 4 mph H 62%29.97 inHg

8:00 AM

Partly cloudy

57° 💧 None 💨 3 mph H 66%29.97 inHg

2:00 PM

Overcast

58° 💧 None 💨 3 mph H 65%30.00 inHg

8:00 PM

Overcast night

67° 💧 None 💨 5 mph H 57%29.91 inHg

Monday

2:00 AM

Overcast night

67° 💧 None 💨 5 mph H 77%29.85 inHg

8:00 AM

Mostly cloudy

68° 💧 None 💨 6 mph H 96%29.83 inHg

2:00 PM

Partly cloudy

70° 💧 None 💨 6 mph H 96%29.88 inHg

8:00 PM

Overcast night

83° 💧 None 💨 8 mph H 64%29.88 inHg

Tuesday

2:00 AM

Partly cloudy night

74° 💧 None 💨 5 mph H 80%29.97 inHg

8:00 AM

Overcast

65° 💧 None 💨 8 mph H 88%30.03 inHg

2:00 PM

Overcast

64° 💧 None 💨 6 mph H 76%30.09 inHg

8:00 PM

Moderate rain

65° 💧 None 💨 5 mph H 92%30.09 inHg

Wednesday

2:00 AM

Partly cloudy night

64° 💧 None 💨 1 mph H 97%30.12 inHg

8:00 AM

Partly cloudy

58° 💧 None 💨 5 mph H 98%30.12 inHg

2:00 PM

Sunny

58° 💧 None 💨 7 mph H 95%30.15 inHg

8:00 PM

Mostly cloudy night

73° 💧 None 💨 1 mph H 59%30.12 inHg

Thursday

2:00 AM

Partly cloudy night

65° 💧 None 💨 2 mph H 75%30.09 inHg

In Belfast and, more broadly, across the state of Pennsylvania: The rest of the day will bring a mix of sun and clouds, with temperatures generally ranging from 69 to 79 degrees Fahrenheit. Light southwest winds will prevail, with speeds up to 8 mph, occasionally gusting to 19 mph. There is a possibility of light rain, with an estimated accumulation of around 0.06 inches, and a maximum probability of 90%. Overall, expect mild to warm conditions with periods of cloudiness and some scattered showers. It’s a good idea to keep an umbrella handy if you're planning to be outdoors later today.

15-Day Weather Outlook for Belfast

TomorrowTomorrow

Partly cloudy 81°/68° 💧 None 💨 12 mph

Friday, Sep 11Fri Sep 11

Overcast 76°/61° 💧 None 💨 7 mph

Saturday, Sep 12Sat Sep 12

Overcast 79°/57° 💧 0.323 in 💨 8 mph

Sunday, Sep 13Sun Sep 13

Moderate rain 82°/67° 💧 0.716 in 💨 9 mph

Monday, Sep 14Mon Sep 14

Partly cloudy 78°/61° 💧 None 💨 9 mph

Tuesday, Sep 15Tue Sep 15

Overcast 71°/64° 💧 0.001 in 💨 6 mph

Wednesday, Sep 16Wed Sep 16

Mostly cloudy 83°/72° 💧 0.019 in 💨 10 mph

Thursday, Sep 17Thu Sep 17

Moderate rain 75°/62° 💧 0.564 in 💨 10 mph

Friday, Sep 18Fri Sep 18

Overcast 70°/64° 💧 0.003 in 💨 6 mph

Saturday, Sep 19Sat Sep 19

Partly cloudy 75°/60° 💧 0.011 in 💨 11 mph

Sunday, Sep 20Sun Sep 20

Partly cloudy 70°/57° 💧 None 💨 7 mph

Monday, Sep 21Mon Sep 21

Overcast 70°/67° 💧 0.023 in 💨 6 mph

Tuesday, Sep 22Tue Sep 22

Overcast 83°/64° 💧 0.026 in 💨 8 mph

Wednesday, Sep 23Wed Sep 23

Moderate rain 65°/58° 💧 0.947 in 💨 7 mph

Thursday, Sep 24Thu Sep 24

Mostly cloudy 73°/65° 💧 None 💨 2 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Belfast

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Belfast

Hourly forecast · Updated every 2 hours

Moderate

Nearest forecast value 1:00 PM

PM2.5 Fine particles Good 9,2µg/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 11,7µg/m³

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

O₃ Ozone Moderate 102,7µg/m³

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

NO₂ Nitrogen dioxide Good 2,8µg/m³

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

Sensitive people should reduce strenuous and prolonged outdoor exertion.

UV & HEALTH

UV, Sun & Health Outlook in Belfast

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 7,1High 😐Moderate

Tomorrow UV 5,7Moderate 🙂Fair

Friday UV 6,5High 😐Moderate

Saturday UV 5,9Moderate 😐Moderate

Sunday UV 6,0High 🙂Fair

Monday UV 6,0High —Unavailable

Tuesday UV 7,0High —Unavailable

Hourly UV index today

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

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.

Caution for sensitive people

People with respiratory or cardiovascular conditions should reduce prolonged outdoor exertion.

Stay hydrated

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

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 Belfast

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · BELFAST, PENNSYLVANIA

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 10:00 PM–11:00 PM.

96/100Best-hour score

BEST TIME TONIGHT 10:00 PM–11:00 PM Astronomical darkness: 8:54 PM–5:02 AM

☁ Cloud cover 5% Real hourly forecast for the best viewing hour.

☾ Moonlight 4% New Moon · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 16° high at the best hour.

✦ Estimated visible meteors 0–2/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min36%

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.

DISCOVER WEATHER NEARBY Weather in other cities

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Forecast data for Belfast were last refreshed today at 12:24 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.