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Current weather in Mason City is broken clouds.

Where can I find the hourly weather forecast for Mason City?

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

Is the weather forecast for Mason City updated regularly?

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

Now · 6:23 AM

Mason City Weather & Hourly Forecast

United States · Illinois · 62664

59°F

Mostly cloudy night

Feels like: 55°F

💧 Humidity 78% 🌡 Pressure 30.21 inHg 💨 Wind 8 mph 👁 Visibility 18.3 mi ☁ Clouds 77% ☀️ UV index 0.0 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Mason City

Today

7:00 AM

Partly cloudy

60° 💧 0.000 in 💨 9 mph H 77%30.21 inHg

10:00 AM

Partly cloudy

68° 💧 None 💨 10 mph H 57%30.24 inHg

1:00 PM

Mostly sunny

77° 💧 None 💨 11 mph H 40%30.15 inHg

4:00 PM

Sunny

81° 💧 None 💨 13 mph H 38%30.06 inHg

7:00 PM

Sunny

77° 💧 None 💨 11 mph H 44%29.97 inHg

10:00 PM

Clear night

74° 💧 None 💨 13 mph H 51%30.03 inHg

Tomorrow

1:00 AM

Overcast night

73° 💧 None 💨 12 mph H 56%30.00 inHg

4:00 AM

Mostly cloudy night

72° 💧 0.000 in 💨 13 mph H 64%29.97 inHg

7:00 AM

Sunny

73° 💧 None 💨 11 mph H 69%30.00 inHg

10:00 AM

Sunny

83° 💧 None 💨 9 mph H 58%30.06 inHg

1:00 PM

Sunny

92° 💧 0.001 in 💨 9 mph H 49%30.03 inHg

4:00 PM

Strong thunderstorm

92° 💧 0.014 in 💨 8 mph H 48%30.00 inHg

7:00 PM

Mostly sunny

84° 💧 None 💨 5 mph H 70%30.06 inHg

10:00 PM

Clear night

77° 💧 None 💨 5 mph H 86%30.12 inHg

Wednesday

1:00 AM

Clear night

74° 💧 0.000 in 💨 6 mph H 94%30.12 inHg

4:00 AM

Partly cloudy night

73° 💧 0.001 in 💨 8 mph H 95%30.15 inHg

Today

7:00 AM

Partly cloudy

60° 💧 None 💨 9 mph H 77%30.21 inHg

8:00 AM

Mostly sunny

62° 💧 0.000 in 💨 9 mph H 73%30.24 inHg

9:00 AM

Mostly cloudy

65° 💧 0.000 in 💨 11 mph H 65%30.24 inHg

10:00 AM

Partly cloudy

68° 💧 None 💨 10 mph H 57%30.24 inHg

11:00 AM

Mostly cloudy

71° 💧 None 💨 11 mph H 49%30.21 inHg

12:00 PM

Overcast

74° 💧 None 💨 11 mph H 45%30.18 inHg

1:00 PM

Mostly sunny

77° 💧 None 💨 11 mph H 40%30.15 inHg

2:00 PM

Mostly sunny

79° 💧 None 💨 12 mph H 38%30.12 inHg

3:00 PM

Sunny

80° 💧 None 💨 12 mph H 38%30.09 inHg

4:00 PM

Sunny

81° 💧 None 💨 13 mph H 38%30.06 inHg

5:00 PM

Sunny

81° 💧 None 💨 12 mph H 38%30.03 inHg

6:00 PM

Mostly sunny

80° 💧 None 💨 11 mph H 41%30.00 inHg

7:00 PM

Sunny

77° 💧 None 💨 11 mph H 44%29.97 inHg

8:00 PM

Clear night

76° 💧 None 💨 13 mph H 47%29.97 inHg

9:00 PM

Clear night

75° 💧 None 💨 14 mph H 49%30.00 inHg

10:00 PM

Clear night

74° 💧 None 💨 13 mph H 51%30.03 inHg

11:00 PM

Mostly cloudy night

74° 💧 None 💨 14 mph H 51%30.03 inHg

Tomorrow

12:00 AM

Overcast night

73° 💧 None 💨 13 mph H 53%30.00 inHg

1:00 AM

Overcast night

73° 💧 None 💨 12 mph H 56%30.00 inHg

2:00 AM

Overcast night

73° 💧 None 💨 12 mph H 59%30.00 inHg

3:00 AM

Mostly cloudy night

72° 💧 None 💨 12 mph H 62%30.00 inHg

4:00 AM

Mostly cloudy night

72° 💧 0.000 in 💨 13 mph H 64%29.97 inHg

5:00 AM

Partly cloudy night

73° 💧 None 💨 13 mph H 66%30.00 inHg

6:00 AM

Partly cloudy night

73° 💧 None 💨 12 mph H 68%30.00 inHg

7:00 AM

Sunny

73° 💧 None 💨 11 mph H 69%30.00 inHg

8:00 AM

Sunny

75° 💧 None 💨 10 mph H 67%30.03 inHg

9:00 AM

Sunny

79° 💧 None 💨 10 mph H 63%30.03 inHg

10:00 AM

Sunny

83° 💧 None 💨 9 mph H 58%30.06 inHg

11:00 AM

Sunny

86° 💧 None 💨 7 mph H 56%30.06 inHg

12:00 PM

Sunny

89° 💧 None 💨 9 mph H 52%30.03 inHg

1:00 PM

Sunny

92° 💧 None 💨 9 mph H 49%30.03 inHg

2:00 PM

Strong thunderstorm

93° 💧 0.000 in 💨 8 mph H 46%30.00 inHg

3:00 PM

Strong thunderstorm

93° 💧 0.000 in 💨 9 mph H 47%30.00 inHg

4:00 PM

Strong thunderstorm

92° 💧 0.001 in 💨 8 mph H 48%30.00 inHg

5:00 PM

Light thunderstorms

90° 💧 0.003 in 💨 7 mph H 54%30.00 inHg

6:00 PM

Light rain

86° 💧 0.011 in 💨 6 mph H 64%30.03 inHg

7:00 PM

Mostly sunny

84° 💧 None 💨 5 mph H 70%30.06 inHg

8:00 PM

Mostly clear night

81° 💧 None 💨 6 mph H 75%30.06 inHg

9:00 PM

Mostly clear night

78° 💧 None 💨 4 mph H 81%30.09 inHg

10:00 PM

Clear night

77° 💧 None 💨 5 mph H 86%30.12 inHg

11:00 PM

Clear night

76° 💧 None 💨 4 mph H 90%30.12 inHg

Wednesday

12:00 AM

Clear night

75° 💧 None 💨 6 mph H 92%30.15 inHg

1:00 AM

Clear night

74° 💧 None 💨 6 mph H 94%30.12 inHg

2:00 AM

Clear night

73° 💧 0.000 in 💨 8 mph H 96%30.12 inHg

3:00 AM

Partly cloudy night

73° 💧 0.000 in 💨 9 mph H 96%30.15 inHg

4:00 AM

Partly cloudy night

73° 💧 0.000 in 💨 8 mph H 95%30.15 inHg

5:00 AM

Overcast night

72° 💧 0.000 in 💨 6 mph H 96%30.15 inHg

6:00 AM

Mostly cloudy night

72° 💧 None 💨 8 mph H 97%30.18 inHg

7:00 AM

Light thunderstorms

72° 💧 0.011 in 💨 8 mph H 96%30.21 inHg

8:00 AM

Light thunderstorms

74° 💧 0.017 in 💨 7 mph H 94%30.18 inHg

9:00 AM

Mostly sunny

77° 💧 0.000 in 💨 5 mph H 87%30.21 inHg

10:00 AM

Sunny

81° 💧 None 💨 4 mph H 78%30.21 inHg

11:00 AM

Partly cloudy

85° 💧 None 💨 3 mph H 68%30.21 inHg

12:00 PM

Strong thunderstorm

88° 💧 0.001 in 💨 2 mph H 61%30.21 inHg

1:00 PM

Mostly sunny

91° 💧 0.000 in 💨 3 mph H 56%30.18 inHg

2:00 PM

Light thunderstorms

92° 💧 0.002 in 💨 5 mph H 51%30.15 inHg

3:00 PM

Light thunderstorms

94° 💧 0.003 in 💨 5 mph H 48%30.12 inHg

4:00 PM

Light thunderstorms

87° 💧 0.021 in 💨 10 mph H 64%30.15 inHg

5:00 PM

Light thunderstorms

83° 💧 0.016 in 💨 6 mph H 77%30.12 inHg

6:00 PM

Mostly sunny

84° 💧 0.002 in 💨 4 mph H 73%30.12 inHg

7:00 PM

Mostly sunny

82° 💧 None 💨 5 mph H 79%30.12 inHg

10:00 PM

Clear night

79° 💧 None 💨 6 mph H 87%30.15 inHg

Thursday

1:00 AM

Clear night

79° 💧 None 💨 6 mph H 83%30.15 inHg

4:00 AM

Clear night

79° 💧 None 💨 8 mph H 71%30.15 inHg

7:00 AM

Overcast

77° 💧 None 💨 6 mph H 77%30.15 inHg

10:00 AM

Mostly cloudy

86° 💧 None 💨 6 mph H 61%30.18 inHg

1:00 PM

Mostly sunny

93° 💧 None 💨 5 mph H 51%30.15 inHg

4:00 PM

Mostly sunny

94° 💧 None 💨 6 mph H 46%30.09 inHg

7:00 PM

Mostly sunny

86° 💧 None 💨 6 mph H 67%30.12 inHg

10:00 PM

Mostly clear night

80° 💧 None 💨 8 mph H 83%30.15 inHg

Friday

1:00 AM

Clear night

76° 💧 None 💨 8 mph H 89%30.15 inHg

4:00 AM

Overcast night

74° 💧 None 💨 8 mph H 94%30.18 inHg

7:00 AM

Partly cloudy

73° 💧 None 💨 8 mph H 89%30.21 inHg

10:00 AM

Sunny

80° 💧 None 💨 7 mph H 67%30.18 inHg

1:00 PM

Partly cloudy

88° 💧 None 💨 6 mph H 56%30.12 inHg

4:00 PM

Sunny

90° 💧 None 💨 5 mph H 53%30.06 inHg

7:00 PM

Moderate rain

82° 💧 None 💨 4 mph H 73%30.06 inHg

10:00 PM

Mostly clear night

77° 💧 None 💨 10 mph H 76%30.06 inHg

Saturday

1:00 AM

Clear night

75° 💧 None 💨 7 mph H 84%30.00 inHg

4:00 AM

Clear night

75° 💧 None 💨 8 mph H 92%29.97 inHg

7:00 AM

Sunny

74° 💧 None 💨 8 mph H 91%29.94 inHg

10:00 AM

Sunny

84° 💧 None 💨 9 mph H 64%29.91 inHg

1:00 PM

Sunny

94° 💧 None 💨 9 mph H 41%29.88 inHg

4:00 PM

Mostly sunny

96° 💧 None 💨 10 mph H 35%29.80 inHg

7:00 PM

Sunny

87° 💧 None 💨 4 mph H 51%29.80 inHg

Sunday

1:00 AM

Clear night

80° 💧 None 💨 6 mph H 57%29.80 inHg

7:00 AM

Partly cloudy

71° 💧 None 💨 4 mph H 79%29.80 inHg

1:00 PM

Mostly sunny

90° 💧 None 💨 6 mph H 43%29.80 inHg

7:00 PM

Partly cloudy

77° 💧 None 💨 9 mph H 76%29.80 inHg

Monday

1:00 AM

Overcast night

74° 💧 None 💨 8 mph H 84%29.85 inHg

7:00 AM

Overcast

68° 💧 None 💨 7 mph H 89%29.85 inHg

1:00 PM

Mostly sunny

79° 💧 None 💨 10 mph H 54%29.85 inHg

7:00 PM

Partly cloudy night

71° 💧 None 💨 16 mph H 60%29.88 inHg

Tuesday

1:00 AM

Clear night

62° 💧 None 💨 13 mph H 74%29.97 inHg

7:00 AM

Sunny

54° 💧 None 💨 12 mph H 75%30.09 inHg

1:00 PM

Sunny

69° 💧 None 💨 13 mph H 36%30.15 inHg

7:00 PM

Clear night

67° 💧 None 💨 7 mph H 44%30.12 inHg

Wednesday

1:00 AM

Clear night

56° 💧 None 💨 3 mph H 74%30.18 inHg

7:00 AM

Sunny

51° 💧 None 💨 2 mph H 95%30.27 inHg

1:00 PM

Sunny

73° 💧 None 💨 5 mph H 36%30.24 inHg

7:00 PM

Clear night

67° 💧 None 💨 4 mph H 44%30.18 inHg

Thursday

1:00 AM

Clear night

58° 💧 None 💨 7 mph H 53%30.24 inHg

7:00 AM

Sunny

53° 💧 None 💨 5 mph H 59%30.27 inHg

1:00 PM

Partly cloudy

75° 💧 None 💨 2 mph H 30%30.24 inHg

7:00 PM

Clear night

69° 💧 None 💨 4 mph H 41%30.18 inHg

Friday

1:00 AM

Clear night

60° 💧 None 💨 5 mph H 54%30.21 inHg

7:00 AM

Partly cloudy

54° 💧 None 💨 4 mph H 69%30.24 inHg

1:00 PM

Mostly sunny

79° 💧 None 💨 2 mph H 28%30.24 inHg

7:00 PM

Clear night

72° 💧 None 💨 3 mph H 41%30.21 inHg

Saturday

1:00 AM

Clear night

64° 💧 None 💨 7 mph H 54%30.24 inHg

7:00 AM

Mostly sunny

57° 💧 None 💨 4 mph H 71%30.30 inHg

1:00 PM

Overcast

80° 💧 None 💨 1 mph H 30%30.27 inHg

7:00 PM

Mostly clear night

74° 💧 None 💨 4 mph H 40%30.21 inHg

Sunday

1:00 AM

Clear night

64° 💧 None 💨 4 mph H 57%30.21 inHg

7:00 AM

Sunny

59° 💧 None 💨 4 mph H 64%30.21 inHg

1:00 PM

Mostly cloudy

82° 💧 None 💨 4 mph H 29%30.15 inHg

7:00 PM

Overcast night

77° 💧 None 💨 4 mph H 32%30.03 inHg

Monday

1:00 AM

Overcast night

69° 💧 None 💨 6 mph H 44%30.00 inHg

7:00 AM

Mostly cloudy

63° 💧 None 💨 5 mph H 54%29.97 inHg

1:00 PM

Mostly cloudy

83° 💧 None 💨 3 mph H 28%29.91 inHg

7:00 PM

Overcast night

76° 💧 None 💨 6 mph H 36%29.91 inHg

In Mason City and, more broadly, across the state of Illinois: This morning starts with a mix of sun and clouds, creating a pleasant start to the day. Temperatures are expected to be mild, ranging from the mid-50s to low 60s, with gentle southeast winds at around 8 to 14 mph. As the day progresses into the afternoon, temperatures will warm up into the upper 70s and around 80 degrees. Winds may increase slightly, with gusts reaching up to 28 mph, but no precipitation is expected throughout the day. Overall, it looks like a comfortable day with partly sunny skies and moderate breezes. It’s a good day to enjoy outdoor activities, just be mindful of the breezy conditions during the afternoon.

15-Day Weather Outlook for Mason City

TomorrowTomorrow

Strong thunderstorm 93°/72° 💧 None 💨 13 mph

Wednesday, Sep 16Wed Sep 16

Light thunderstorms 94°/72° 💧 0.093 in 💨 10 mph

Thursday, Sep 17Thu Sep 17

Mostly sunny 94°/77° 💧 0.023 in 💨 8 mph

Friday, Sep 18Fri Sep 18

Moderate rain 90°/73° 💧 0.109 in 💨 10 mph

Saturday, Sep 19Sat Sep 19

Mostly sunny 96°/74° 💧 0.001 in 💨 10 mph

Sunday, Sep 20Sun Sep 20

Partly cloudy 90°/71° 💧 0.015 in 💨 9 mph

Monday, Sep 21Mon Sep 21

Mostly sunny 79°/68° 💧 0.023 in 💨 16 mph

Tuesday, Sep 22Tue Sep 22

Sunny 69°/54° 💧 None 💨 13 mph

Wednesday, Sep 23Wed Sep 23

Sunny 73°/51° 💧 None 💨 5 mph

Thursday, Sep 24Thu Sep 24

Partly cloudy 75°/53° 💧 None 💨 7 mph

Friday, Sep 25Fri Sep 25

Partly cloudy 79°/54° 💧 None 💨 5 mph

Saturday, Sep 26Sat Sep 26

Mostly sunny 80°/57° 💧 None 💨 7 mph

Sunday, Sep 27Sun Sep 27

Mostly cloudy 82°/59° 💧 None 💨 4 mph

Monday, Sep 28Mon Sep 28

Overcast 83°/63° 💧 None 💨 6 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Mason City

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Mason City

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 7:00 AM

PM2.5 Fine particles Good 3,3µg/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 3,7µg/m³

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

O₃ Ozone Good 56,2µg/m³

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

NO₂ Nitrogen dioxide Good 4,5µg/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 Mason City

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 5,2Moderate 😊Good

Tomorrow UV 4,6Moderate 🙂Fair

Wednesday UV 6,6High 😐Moderate

Thursday UV 6,0High 🙂Fair

Friday UV 7,0High 🙂Fair

Saturday UV 8,0Very high —Unavailable

Sunday UV 5,0Moderate —Unavailable

Hourly UV index today

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

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

Moderate UV risk

Sunglasses and sun protection are recommended for 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 Mason City

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · MASON CITY, ILLINOIS

Tonight's Stargazing & Shooting Stars

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

99/100Best-hour score

BEST TIME TONIGHT 10:00 PM–11:00 PM Astronomical darkness: 8:41 PM–5:07 AM

☁ Cloud cover 2% Real hourly forecast for the best viewing hour.

☾ Moonlight 12% Waxing Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 19° 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 min42%

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 Mason City were last refreshed today at 6:23 AM. The current forecast period extends through 16/09/2026 at 4:00 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.