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Current weather in Grantsburg is broken clouds.

Where can I find the hourly weather forecast for Grantsburg?

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

Is the weather forecast for Grantsburg updated regularly?

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

Now · 8:55 AM

Grantsburg Weather & Hourly Forecast

United States · Wisconsin · 54840

64°F

Mostly cloudy

Feels like: 65°F

💧 Humidity 91% 🌡 Pressure 29.94 inHg 💨 Wind 4 mph 👁 Visibility 6.2 mi ☁ Clouds 62% ☀️ UV index 0.4 · Low 🌅 Sunrise 6:33 AM 🌇 Sunset 7:48 PM

Hourly Forecast for Grantsburg

Today

9:00 AM

Mostly cloudy

64° 💧 None 💨 4 mph H 91%29.94 inHg

12:00 PM

Mostly cloudy

75° 💧 None 💨 1 mph H 53%29.88 inHg

3:00 PM

Sunny

86° 💧 None 💨 2 mph H 25%29.83 inHg

6:00 PM

Sunny

84° 💧 None 💨 5 mph H 28%29.80 inHg

9:00 PM

Clear night

70° 💧 None 💨 8 mph H 46%29.83 inHg

Tomorrow

12:00 AM

Light rain

66° 💧 0.03 in 💨 5 mph H 71%29.85 inHg

3:00 AM

Light rain

61° 💧 0.13 in 💨 8 mph H 93%29.83 inHg

6:00 AM

Light rain

59° 💧 0.06 in 💨 6 mph H 98%29.83 inHg

9:00 AM

Mostly cloudy

68° 💧 0.01 in 💨 10 mph H 89%29.83 inHg

12:00 PM

Partly cloudy

81° 💧 None 💨 8 mph H 53%29.80 inHg

3:00 PM

Overcast

91° 💧 0.02 in 💨 6 mph H 33%29.74 inHg

6:00 PM

Heavy rain

73° 💧 0.34 in 💨 17 mph H 88%29.74 inHg

9:00 PM

Mostly cloudy night

67° 💧 0.00 in 💨 9 mph H 93%29.80 inHg

Friday

12:00 AM

Light rain

68° 💧 0.02 in 💨 4 mph H 94%29.83 inHg

3:00 AM

Mostly cloudy night

62° 💧 None 💨 13 mph H 97%29.85 inHg

6:00 AM

Partly cloudy night

62° 💧 None 💨 6 mph H 98%29.83 inHg

Today

9:00 AM

Mostly cloudy

64° 💧 None 💨 4 mph H 91%29.94 inHg

10:00 AM

Mostly cloudy

66° 💧 None 💨 3 mph H 82%29.94 inHg

11:00 AM

Mostly cloudy

70° 💧 None 💨 4 mph H 68%29.91 inHg

12:00 PM

Mostly cloudy

75° 💧 None 💨 1 mph H 53%29.88 inHg

1:00 PM

Mostly cloudy

82° 💧 None 💨 2 mph H 36%29.85 inHg

2:00 PM

Sunny

85° 💧 None 💨 2 mph H 26%29.83 inHg

3:00 PM

Sunny

86° 💧 None 💨 2 mph H 25%29.83 inHg

4:00 PM

Sunny

86° 💧 None 💨 3 mph H 26%29.80 inHg

5:00 PM

Sunny

86° 💧 None 💨 4 mph H 27%29.80 inHg

6:00 PM

Sunny

84° 💧 None 💨 5 mph H 28%29.80 inHg

7:00 PM

Sunny

78° 💧 None 💨 6 mph H 33%29.80 inHg

8:00 PM

Clear night

73° 💧 None 💨 9 mph H 42%29.80 inHg

9:00 PM

Clear night

70° 💧 None 💨 8 mph H 46%29.83 inHg

10:00 PM

Clear night

69° 💧 None 💨 8 mph H 49%29.83 inHg

11:00 PM

Clear night

69° 💧 None 💨 8 mph H 53%29.83 inHg

Tomorrow

12:00 AM

Light rain

66° 💧 0.01 in 💨 5 mph H 71%29.85 inHg

1:00 AM

Light rain

63° 💧 0.01 in 💨 6 mph H 83%29.85 inHg

2:00 AM

Light rain

61° 💧 0.01 in 💨 8 mph H 91%29.85 inHg

3:00 AM

Light rain

61° 💧 0.01 in 💨 8 mph H 93%29.83 inHg

4:00 AM

Light rain

60° 💧 0.04 in 💨 7 mph H 95%29.83 inHg

5:00 AM

Moderate rain

59° 💧 0.09 in 💨 6 mph H 96%29.83 inHg

6:00 AM

Light rain

59° 💧 0.01 in 💨 6 mph H 98%29.83 inHg

7:00 AM

Light rain

60° 💧 0.03 in 💨 7 mph H 98%29.85 inHg

8:00 AM

Light rain

64° 💧 0.02 in 💨 8 mph H 95%29.83 inHg

9:00 AM

Mostly cloudy

68° 💧 None 💨 10 mph H 89%29.83 inHg

10:00 AM

Light rain

72° 💧 0.01 in 💨 10 mph H 80%29.85 inHg

11:00 AM

Mostly cloudy

76° 💧 None 💨 10 mph H 68%29.83 inHg

12:00 PM

Partly cloudy

81° 💧 None 💨 8 mph H 53%29.80 inHg

1:00 PM

Partly cloudy

87° 💧 None 💨 7 mph H 44%29.80 inHg

2:00 PM

Overcast

90° 💧 None 💨 7 mph H 37%29.77 inHg

3:00 PM

Overcast

91° 💧 None 💨 6 mph H 33%29.74 inHg

4:00 PM

Overcast

91° 💧 None 💨 4 mph H 32%29.74 inHg

5:00 PM

Light rain

86° 💧 0.02 in 💨 7 mph H 37%29.65 inHg

6:00 PM

Heavy rain

73° 💧 0.33 in 💨 17 mph H 88%29.74 inHg

7:00 PM

Overcast

71° 💧 None 💨 9 mph H 88%29.71 inHg

8:00 PM

Light rain

69° 💧 0.01 in 💨 12 mph H 91%29.80 inHg

9:00 PM

Mostly cloudy night

67° 💧 None 💨 9 mph H 93%29.80 inHg

10:00 PM

Partly cloudy night

66° 💧 None 💨 6 mph H 95%29.80 inHg

11:00 PM

Light rain

66° 💧 0.00 in 💨 6 mph H 96%29.80 inHg

Friday

12:00 AM

Light rain

68° 💧 0.01 in 💨 4 mph H 94%29.83 inHg

1:00 AM

Partly cloudy night

68° 💧 None 💨 6 mph H 95%29.80 inHg

2:00 AM

Light rain

63° 💧 0.01 in 💨 14 mph H 97%29.85 inHg

3:00 AM

Mostly cloudy night

62° 💧 None 💨 13 mph H 97%29.85 inHg

4:00 AM

Partly cloudy night

61° 💧 None 💨 12 mph H 98%29.85 inHg

5:00 AM

Partly cloudy night

62° 💧 None 💨 9 mph H 98%29.83 inHg

6:00 AM

Partly cloudy night

62° 💧 None 💨 6 mph H 98%29.83 inHg

7:00 AM

Partly cloudy

62° 💧 None 💨 5 mph H 98%29.83 inHg

8:00 AM

Partly cloudy

66° 💧 None 💨 4 mph H 95%29.83 inHg

9:00 AM

Mostly sunny

69° 💧 None 💨 6 mph H 89%29.85 inHg

10:00 AM

Partly cloudy

73° 💧 None 💨 6 mph H 80%29.88 inHg

11:00 AM

Partly cloudy

78° 💧 None 💨 7 mph H 66%29.85 inHg

12:00 PM

Mostly sunny

82° 💧 None 💨 7 mph H 58%29.85 inHg

1:00 PM

Mostly sunny

86° 💧 None 💨 7 mph H 51%29.85 inHg

2:00 PM

Sunny

89° 💧 None 💨 7 mph H 46%29.83 inHg

3:00 PM

Sunny

91° 💧 None 💨 7 mph H 43%29.83 inHg

4:00 PM

Sunny

92° 💧 None 💨 7 mph H 41%29.83 inHg

5:00 PM

Sunny

92° 💧 None 💨 7 mph H 41%29.80 inHg

6:00 PM

Sunny

91° 💧 None 💨 8 mph H 43%29.80 inHg

7:00 PM

Sunny

84° 💧 None 💨 11 mph H 56%29.83 inHg

8:00 PM

Clear night

71° 💧 None 💨 13 mph H 75%29.85 inHg

9:00 PM

Clear night

69° 💧 None 💨 11 mph H 82%29.88 inHg

10:00 PM

Clear night

69° 💧 None 💨 11 mph H 82%29.88 inHg

11:00 PM

Clear night

67° 💧 None 💨 10 mph H 81%29.91 inHg

Saturday

12:00 AM

Light rain

65° 💧 0.00 in 💨 9 mph H 85%29.91 inHg

1:00 AM

Clear night

64° 💧 None 💨 9 mph H 86%29.91 inHg

2:00 AM

Clear night

63° 💧 None 💨 7 mph H 90%29.91 inHg

3:00 AM

Clear night

62° 💧 None 💨 7 mph H 93%29.88 inHg

4:00 AM

Clear night

61° 💧 None 💨 7 mph H 96%29.88 inHg

5:00 AM

Clear night

61° 💧 None 💨 8 mph H 97%29.88 inHg

6:00 AM

Clear night

61° 💧 None 💨 7 mph H 98%29.91 inHg

7:00 AM

Sunny

62° 💧 None 💨 7 mph H 99%29.91 inHg

8:00 AM

Partly cloudy

66° 💧 None 💨 8 mph H 94%29.91 inHg

9:00 AM

Partly cloudy

72° 💧 None 💨 9 mph H 83%29.91 inHg

10:00 AM

Partly cloudy

77° 💧 None 💨 9 mph H 72%29.94 inHg

11:00 AM

Partly cloudy

81° 💧 None 💨 9 mph H 63%29.91 inHg

12:00 PM

Partly cloudy

84° 💧 None 💨 8 mph H 55%29.91 inHg

1:00 PM

Partly cloudy

87° 💧 None 💨 7 mph H 50%29.91 inHg

2:00 PM

Sunny

90° 💧 None 💨 8 mph H 45%29.88 inHg

3:00 PM

Sunny

91° 💧 None 💨 8 mph H 42%29.88 inHg

4:00 PM

Sunny

92° 💧 None 💨 9 mph H 39%29.85 inHg

5:00 PM

Sunny

92° 💧 None 💨 9 mph H 39%29.85 inHg

6:00 PM

Sunny

90° 💧 None 💨 9 mph H 42%29.85 inHg

7:00 PM

Sunny

85° 💧 None 💨 8 mph H 52%29.85 inHg

8:00 PM

Clear night

78° 💧 None 💨 7 mph H 68%29.85 inHg

9:00 PM

Clear night

74° 💧 None 💨 7 mph H 75%29.88 inHg

10:00 PM

Clear night

72° 💧 None 💨 7 mph H 79%29.91 inHg

11:00 PM

Clear night

70° 💧 None 💨 8 mph H 81%29.94 inHg

Sunday

12:00 AM

Partly cloudy night

70° 💧 None 💨 7 mph H 81%29.94 inHg

1:00 AM

Partly cloudy night

69° 💧 None 💨 8 mph H 84%29.91 inHg

2:00 AM

Moderate rain

68° 💧 0.14 in 💨 8 mph H 93%29.97 inHg

3:00 AM

Heavy rain

65° 💧 0.16 in 💨 4 mph H 96%29.97 inHg

4:00 AM

Light rain

66° 💧 0.01 in 💨 5 mph H 97%29.91 inHg

5:00 AM

Overcast night

67° 💧 None 💨 4 mph H 97%29.91 inHg

6:00 AM

Overcast night

69° 💧 None 💨 10 mph H 93%29.91 inHg

7:00 AM

Overcast

68° 💧 None 💨 6 mph H 94%29.94 inHg

8:00 AM

Light rain

70° 💧 0.01 in 💨 7 mph H 92%29.94 inHg

In Grantsburg and, more broadly, across the state of Wisconsin: This morning will feature a mix of sun and clouds with mild temperatures starting around 63 degrees. Winds will be light from the east at around 4 mph, with occasional gusts up to 8 mph. As the day progresses into the afternoon, temperatures are expected to warm into the upper 70s or low 80s. There is a possibility of rain, with total accumulation around 0.21 inches, and the highest likelihood of rain occurring later in the day. Winds will remain gentle, coming from the east at similar speeds, with occasional gusts. Overall, expect a mild and partly cloudy start, with a chance of showers later on. Be prepared for some light rain if you have outdoor plans.

15-Day Weather Outlook for Grantsburg

TomorrowTomorrow

Heavy rain 91°/59° 💧 0.59 in 💨 17 mph

Friday, Sep 4Fri Sep 4

Light rain 92°/61° 💧 0.02 in 💨 14 mph

Saturday, Sep 5Sat Sep 5

Light rain 92°/61° 💧 0.00 in 💨 9 mph

Sunday, Sep 6Sun Sep 6

Moderate rain 87°/66° 💧 0.39 in 💨 10 mph

Monday, Sep 7Mon Sep 7

Heavy rain 70°/66° 💧 1.36 in 💨 17 mph

Tuesday, Sep 8Tue Sep 8

Light rain 86°/66° 💧 0.05 in 💨 15 mph

Wednesday, Sep 9Wed Sep 9

Overcast 68°/54° 💧 None 💨 16 mph

Thursday, Sep 10Thu Sep 10

Light rain 73°/49° 💧 0.01 in 💨 6 mph

Friday, Sep 11Fri Sep 11

Light rain 73°/59° 💧 0.04 in 💨 11 mph

Saturday, Sep 12Sat Sep 12

Light rain 84°/59° 💧 0.03 in 💨 18 mph

Sunday, Sep 13Sun Sep 13

Light rain 91°/72° 💧 0.02 in 💨 16 mph

Monday, Sep 14Mon Sep 14

Mostly sunny 83°/61° 💧 None 💨 13 mph

Tuesday, Sep 15Tue Sep 15

Mostly cloudy 85°/60° 💧 None 💨 15 mph

Wednesday, Sep 16Wed Sep 16

Sunny 82°/63° 💧 None 💨 18 mph

Thursday, Sep 17Thu Sep 17

Light rain 68°/51° 💧 0.02 in 💨 11 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Grantsburg

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Grantsburg

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 9:00 AM

PM2.5 Fine particles Good 6,0µg/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 7,1µg/m³

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

O₃ Ozone Good 15,5µg/m³

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

NO₂ Nitrogen dioxide Good 6,9µg/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 Grantsburg

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 6,6High 😊Good

Tomorrow UV 6,4High 🙂Fair

Friday UV 6,5High 🙂Fair

Saturday UV 6,3High 🙂Fair

Sunday UV 7,0High 😊Good

Monday UV 4,0Moderate —Unavailable

Tuesday UV 4,0Moderate —Unavailable

Hourly UV index today

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

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.

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 Grantsburg

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

Internal PR simulation: 3.58 Population: 1,340

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Forecast data for Grantsburg were last refreshed today at 8:07 AM. The current forecast period extends through 04/09/2026 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.