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Current weather in Sullivan is scattered clouds.

Where can I find the hourly weather forecast for Sullivan?

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

Is the weather forecast for Sullivan updated regularly?

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

Now · 10:39 AM

Sullivan Weather & Hourly Forecast

United States · Wisconsin · 53178

75°F

Partly cloudy

Feels like: 76°F

💧 Humidity 68% 🌡 Pressure 30.12 inHg 💨 Wind 6 mph 👁 Visibility 22.1 mi ☁ Clouds 42% ☀️ UV index 3.4 · Moderate 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Sullivan

Today

11:00 AM

Partly cloudy

75° 💧 None 💨 6 mph H 68%30.12 inHg

2:00 PM

Partly cloudy

78° 💧 None 💨 6 mph H 58%30.09 inHg

5:00 PM

Partly cloudy

76° 💧 None 💨 7 mph H 62%30.06 inHg

8:00 PM

Clear night

66° 💧 None 💨 6 mph H 80%30.09 inHg

11:00 PM

Clear night

62° 💧 None 💨 4 mph H 89%30.15 inHg

Tomorrow

2:00 AM

Clear night

61° 💧 None 💨 4 mph H 90%30.15 inHg

5:00 AM

Partly cloudy night

60° 💧 None 💨 2 mph H 92%30.18 inHg

8:00 AM

Partly cloudy

66° 💧 None 💨 5 mph H 88%30.18 inHg

11:00 AM

Partly cloudy

75° 💧 None 💨 6 mph H 65%30.18 inHg

2:00 PM

Mostly cloudy

77° 💧 None 💨 6 mph H 58%30.15 inHg

5:00 PM

Mostly sunny

76° 💧 None 💨 7 mph H 59%30.12 inHg

8:00 PM

Mostly cloudy night

67° 💧 None 💨 7 mph H 76%30.15 inHg

11:00 PM

Overcast night

63° 💧 None 💨 6 mph H 85%30.15 inHg

Tuesday

2:00 AM

Overcast night

64° 💧 None 💨 8 mph H 88%30.12 inHg

5:00 AM

Overcast night

63° 💧 None 💨 7 mph H 88%30.12 inHg

8:00 AM

Overcast

65° 💧 None 💨 8 mph H 85%30.12 inHg

Today

11:00 AM

Partly cloudy

75° 💧 None 💨 6 mph H 68%30.12 inHg

12:00 PM

Partly cloudy

77° 💧 None 💨 6 mph H 62%30.12 inHg

1:00 PM

Mostly sunny

78° 💧 None 💨 5 mph H 60%30.09 inHg

2:00 PM

Partly cloudy

78° 💧 None 💨 6 mph H 58%30.09 inHg

3:00 PM

Partly cloudy

78° 💧 None 💨 6 mph H 57%30.09 inHg

4:00 PM

Partly cloudy

78° 💧 None 💨 6 mph H 58%30.09 inHg

5:00 PM

Partly cloudy

76° 💧 None 💨 7 mph H 62%30.06 inHg

6:00 PM

Sunny

73° 💧 None 💨 8 mph H 69%30.09 inHg

7:00 PM

Sunny

70° 💧 None 💨 7 mph H 75%30.09 inHg

8:00 PM

Clear night

66° 💧 None 💨 6 mph H 80%30.09 inHg

9:00 PM

Clear night

64° 💧 None 💨 5 mph H 83%30.12 inHg

10:00 PM

Clear night

62° 💧 None 💨 4 mph H 87%30.12 inHg

11:00 PM

Clear night

62° 💧 None 💨 4 mph H 89%30.15 inHg

Tomorrow

12:00 AM

Clear night

61° 💧 None 💨 4 mph H 89%30.15 inHg

1:00 AM

Clear night

61° 💧 None 💨 4 mph H 89%30.15 inHg

2:00 AM

Clear night

61° 💧 None 💨 4 mph H 90%30.15 inHg

3:00 AM

Mostly clear night

61° 💧 None 💨 3 mph H 90%30.15 inHg

4:00 AM

Mostly cloudy night

60° 💧 None 💨 2 mph H 91%30.15 inHg

5:00 AM

Partly cloudy night

60° 💧 None 💨 2 mph H 92%30.18 inHg

6:00 AM

Mostly cloudy night

60° 💧 None 💨 4 mph H 95%30.18 inHg

7:00 AM

Mostly cloudy

61° 💧 None 💨 4 mph H 94%30.15 inHg

8:00 AM

Partly cloudy

66° 💧 None 💨 5 mph H 88%30.18 inHg

9:00 AM

Mostly sunny

70° 💧 None 💨 4 mph H 81%30.21 inHg

10:00 AM

Mostly sunny

73° 💧 None 💨 5 mph H 72%30.21 inHg

11:00 AM

Partly cloudy

75° 💧 None 💨 6 mph H 65%30.18 inHg

12:00 PM

Mostly cloudy

76° 💧 None 💨 7 mph H 60%30.18 inHg

1:00 PM

Mostly cloudy

77° 💧 None 💨 7 mph H 59%30.18 inHg

2:00 PM

Mostly cloudy

77° 💧 None 💨 6 mph H 58%30.15 inHg

3:00 PM

Mostly cloudy

78° 💧 None 💨 6 mph H 58%30.15 inHg

4:00 PM

Partly cloudy

77° 💧 None 💨 6 mph H 59%30.12 inHg

5:00 PM

Mostly sunny

76° 💧 None 💨 7 mph H 59%30.12 inHg

6:00 PM

Mostly sunny

74° 💧 None 💨 7 mph H 64%30.12 inHg

7:00 PM

Sunny

70° 💧 None 💨 8 mph H 71%30.15 inHg

8:00 PM

Mostly cloudy night

67° 💧 None 💨 7 mph H 76%30.15 inHg

9:00 PM

Partly cloudy night

65° 💧 None 💨 7 mph H 81%30.15 inHg

10:00 PM

Mostly cloudy night

64° 💧 None 💨 7 mph H 83%30.15 inHg

11:00 PM

Overcast night

63° 💧 None 💨 6 mph H 85%30.15 inHg

Tuesday

12:00 AM

Mostly cloudy night

63° 💧 None 💨 6 mph H 87%30.15 inHg

1:00 AM

Mostly cloudy night

63° 💧 None 💨 6 mph H 89%30.15 inHg

2:00 AM

Overcast night

64° 💧 None 💨 8 mph H 88%30.12 inHg

3:00 AM

Overcast night

64° 💧 None 💨 6 mph H 88%30.12 inHg

4:00 AM

Mostly cloudy night

63° 💧 None 💨 7 mph H 86%30.12 inHg

5:00 AM

Overcast night

63° 💧 None 💨 7 mph H 88%30.12 inHg

6:00 AM

Mostly cloudy night

62° 💧 None 💨 7 mph H 89%30.12 inHg

7:00 AM

Mostly cloudy

62° 💧 None 💨 7 mph H 89%30.12 inHg

8:00 AM

Overcast

65° 💧 None 💨 8 mph H 85%30.12 inHg

9:00 AM

Overcast

68° 💧 None 💨 7 mph H 79%30.12 inHg

10:00 AM

Mostly cloudy

72° 💧 None 💨 8 mph H 73%30.12 inHg

11:00 AM

Overcast

75° 💧 None 💨 10 mph H 67%30.09 inHg

12:00 PM

Overcast

77° 💧 None 💨 9 mph H 61%30.09 inHg

1:00 PM

Overcast

78° 💧 None 💨 9 mph H 58%30.06 inHg

2:00 PM

Overcast

80° 💧 None 💨 9 mph H 58%30.03 inHg

3:00 PM

Overcast

81° 💧 None 💨 8 mph H 57%30.03 inHg

4:00 PM

Mostly cloudy

80° 💧 None 💨 9 mph H 58%30.00 inHg

5:00 PM

Mostly cloudy

80° 💧 None 💨 9 mph H 59%29.97 inHg

6:00 PM

Mostly sunny

78° 💧 None 💨 7 mph H 66%29.97 inHg

7:00 PM

Mostly cloudy

76° 💧 None 💨 8 mph H 69%29.97 inHg

Wednesday

4:00 AM

Light rain

69° 💧 None 💨 10 mph H 86%29.94 inHg

7:00 AM

Light rain

68° 💧 None 💨 10 mph H 96%29.97 inHg

10:00 AM

Overcast

72° 💧 None 💨 10 mph H 89%29.94 inHg

1:00 PM

Overcast

80° 💧 None 💨 10 mph H 69%29.91 inHg

4:00 PM

Overcast

81° 💧 None 💨 13 mph H 63%29.88 inHg

7:00 PM

Mostly cloudy

75° 💧 None 💨 9 mph H 71%29.88 inHg

10:00 PM

Mostly clear night

68° 💧 None 💨 6 mph H 69%29.94 inHg

Thursday

1:00 AM

Clear night

64° 💧 None 💨 4 mph H 80%29.94 inHg

4:00 AM

Clear night

61° 💧 None 💨 4 mph H 88%29.97 inHg

7:00 AM

Sunny

59° 💧 None 💨 5 mph H 92%29.97 inHg

10:00 AM

Sunny

68° 💧 None 💨 6 mph H 74%29.97 inHg

1:00 PM

Mostly sunny

72° 💧 None 💨 8 mph H 60%29.97 inHg

4:00 PM

Sunny

73° 💧 None 💨 8 mph H 55%29.91 inHg

7:00 PM

Sunny

67° 💧 None 💨 2 mph H 72%29.91 inHg

10:00 PM

Clear night

62° 💧 None 💨 1 mph H 81%29.94 inHg

Friday

1:00 AM

Clear night

58° 💧 None 💨 4 mph H 90%29.94 inHg

4:00 AM

Clear night

57° 💧 None 💨 3 mph H 94%29.94 inHg

7:00 AM

Sunny

56° 💧 None 💨 4 mph H 93%29.94 inHg

10:00 AM

Sunny

70° 💧 None 💨 7 mph H 67%29.94 inHg

1:00 PM

Sunny

74° 💧 None 💨 8 mph H 55%29.88 inHg

4:00 PM

Sunny

76° 💧 None 💨 8 mph H 55%29.83 inHg

7:00 PM

Partly cloudy

69° 💧 None 💨 5 mph H 76%29.80 inHg

10:00 PM

Partly cloudy night

65° 💧 None 💨 7 mph H 79%29.80 inHg

Saturday

1:00 AM

Partly cloudy night

65° 💧 None 💨 7 mph H 79%29.80 inHg

7:00 AM

Light rain

62° 💧 None 💨 7 mph H 94%29.83 inHg

1:00 PM

Light rain

65° 💧 None 💨 5 mph H 98%29.80 inHg

7:00 PM

Overcast

72° 💧 None 💨 5 mph H 87%29.83 inHg

Sunday

1:00 AM

Mostly cloudy night

72° 💧 None 💨 1 mph H 88%29.85 inHg

7:00 AM

Mostly cloudy

65° 💧 None 💨 4 mph H 98%29.91 inHg

1:00 PM

Light rain

69° 💧 None 💨 9 mph H 99%29.91 inHg

7:00 PM

Overcast

82° 💧 None 💨 10 mph H 79%29.83 inHg

Monday

1:00 AM

Clear night

83° 💧 None 💨 12 mph H 76%29.77 inHg

7:00 AM

Overcast

80° 💧 None 💨 12 mph H 81%29.83 inHg

1:00 PM

Sunny

76° 💧 None 💨 10 mph H 86%29.85 inHg

7:00 PM

Sunny

87° 💧 None 💨 11 mph H 63%29.83 inHg

Tuesday

1:00 AM

Light rain

75° 💧 None 💨 11 mph H 92%29.80 inHg

7:00 AM

Overcast

63° 💧 None 💨 12 mph H 94%29.91 inHg

1:00 PM

Mostly cloudy

58° 💧 None 💨 11 mph H 87%30.06 inHg

7:00 PM

Mostly sunny

67° 💧 None 💨 12 mph H 56%30.09 inHg

Wednesday

1:00 AM

Mostly clear night

63° 💧 None 💨 6 mph H 66%30.15 inHg

7:00 AM

Overcast

56° 💧 None 💨 6 mph H 85%30.24 inHg

1:00 PM

Sunny

53° 💧 None 💨 3 mph H 96%30.27 inHg

7:00 PM

Overcast

68° 💧 None 💨 5 mph H 55%30.27 inHg

Thursday

1:00 AM

Partly cloudy night

63° 💧 None 💨 5 mph H 69%30.24 inHg

7:00 AM

Sunny

56° 💧 None 💨 2 mph H 87%30.24 inHg

1:00 PM

Overcast

53° 💧 None 💨 4 mph H 99%30.21 inHg

7:00 PM

Partly cloudy

71° 💧 None 💨 8 mph H 49%30.12 inHg

Friday

1:00 AM

Mostly cloudy night

65° 💧 None 💨 4 mph H 75%30.00 inHg

7:00 AM

Overcast

61° 💧 None 💨 8 mph H 80%29.97 inHg

1:00 PM

Mostly cloudy

59° 💧 None 💨 6 mph H 86%29.91 inHg

7:00 PM

Moderate rain

68° 💧 None 💨 12 mph H 80%29.83 inHg

Saturday

1:00 AM

Clear night

58° 💧 None 💨 5 mph H 81%29.85 inHg

7:00 AM

Sunny

53° 💧 None 💨 9 mph H 72%29.94 inHg

1:00 PM

Sunny

48° 💧 None 💨 7 mph H 77%30.03 inHg

7:00 PM

Clear night

61° 💧 None 💨 9 mph H 48%30.06 inHg

Sunday

1:00 AM

Partly cloudy night

57° 💧 None 💨 7 mph H 58%30.06 inHg

7:00 AM

Sunny

48° 💧 None 💨 5 mph H 78%30.18 inHg

1:00 PM

Sunny

44° 💧 None 💨 7 mph H 86%30.27 inHg

7:00 PM

Overcast night

56° 💧 None 💨 11 mph H 56%30.30 inHg

Monday

1:00 AM

Mostly clear night

54° 💧 None 💨 5 mph H 63%30.33 inHg

In Sullivan and, more broadly, across the state of Wisconsin: The rest of the day will be mostly sunny with just a few clouds drifting across the sky. Temperatures will remain mild, ranging from 66 to 74 degrees Fahrenheit. Light east winds are expected, with speeds around 9 mph and gusts reaching up to 16 mph. No precipitation is anticipated, making for a pleasant afternoon. Overall, it looks like a comfortable day with clear skies and gentle breezes.

15-Day Weather Outlook for Sullivan

TomorrowTomorrow

Mostly sunny 78°/60° 💧 None 💨 7 mph

Tuesday, Sep 8Tue Sep 8

Mostly cloudy 81°/62° 💧 None 💨 10 mph

Wednesday, Sep 9Wed Sep 9

Light rain 81°/68° 💧 0.480 in 💨 13 mph

Thursday, Sep 10Thu Sep 10

Mostly cloudy 75°/59° 💧 None 💨 9 mph

Friday, Sep 11Fri Sep 11

Sunny 76°/56° 💧 None 💨 8 mph

Saturday, Sep 12Sat Sep 12

Light rain 69°/62° 💧 0.255 in 💨 7 mph

Sunday, Sep 13Sun Sep 13

Light rain 72°/65° 💧 0.055 in 💨 9 mph

Monday, Sep 14Mon Sep 14

Overcast 83°/76° 💧 0.156 in 💨 12 mph

Tuesday, Sep 15Tue Sep 15

Light rain 87°/58° 💧 0.267 in 💨 12 mph

Wednesday, Sep 16Wed Sep 16

Mostly sunny 67°/53° 💧 None 💨 12 mph

Thursday, Sep 17Thu Sep 17

Overcast 68°/53° 💧 0.005 in 💨 5 mph

Friday, Sep 18Fri Sep 18

Partly cloudy 71°/59° 💧 None 💨 8 mph

Saturday, Sep 19Sat Sep 19

Moderate rain 68°/48° 💧 0.153 in 💨 12 mph

Sunday, Sep 20Sun Sep 20

Partly cloudy 61°/44° 💧 None 💨 9 mph

Monday, Sep 21Mon Sep 21

Overcast 56°/54° 💧 0.002 in 💨 11 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Sullivan

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Sullivan

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 11:00 AM

PM2.5 Fine particles Good 4,2µg/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 4,8µg/m³

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

O₃ Ozone Fair 67,3µg/m³

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

NO₂ Nitrogen dioxide Good 3,7µg/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 Sullivan

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 7,2High 🙂Fair

Tomorrow UV 7,1High 😐Moderate

Tuesday UV 6,9High 😐Moderate

Wednesday UV 6,3High 🙂Fair

Thursday UV 6,0High 😊Good

Friday UV 7,0High —Unavailable

Saturday UV 6,0High —Unavailable

Hourly UV index today

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

Acceptable air quality

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

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 Sullivan

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · SULLIVAN, WISCONSIN

Tonight's Stargazing & Shooting Stars

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

95/100Best-hour score

BEST TIME TONIGHT 2:00 AM–3:00 AM Astronomical darkness: 8:59 PM–4:46 AM

☁ Cloud cover 4% Real hourly forecast for the best viewing hour.

☾ Moonlight 22% Waning Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 56° 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 min74%

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 Sullivan were last refreshed today at 10:39 AM. The current forecast period extends through 08/09/2026 at 8:00 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.