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Current weather in Sidney is clear sky.

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

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

Now · 10:26 PM

Sidney Weather & Hourly Forecast

United States · Montana · 59270

67°F

Clear night

Feels like: 66°F

💧 Humidity 68% 🌡 Pressure 29.83 inHg 💨 Wind 7 mph 👁 Visibility 6.2 mi ☁ Clouds 6% ☀️ UV index 0.0 · Low 🌅 Sunrise 6:18 AM 🌇 Sunset 7:34 PM

Hourly Forecast for Sidney

Today

11:00 PM

Clear night

67° 💧 None 💨 7 mph H 68%29.83 inHg

Tomorrow

2:00 AM

Partly cloudy night

66° 💧 None 💨 7 mph H 74%29.80 inHg

5:00 AM

Mostly cloudy night

66° 💧 None 💨 9 mph H 77%29.80 inHg

8:00 AM

Partly cloudy

70° 💧 None 💨 14 mph H 62%29.80 inHg

11:00 AM

Partly cloudy

84° 💧 None 💨 21 mph H 30%29.71 inHg

2:00 PM

Sunny

95° 💧 None 💨 18 mph H 15%29.62 inHg

5:00 PM

Sunny

99° 💧 None 💨 14 mph H 10%29.56 inHg

8:00 PM

Partly cloudy night

85° 💧 None 💨 8 mph H 17%29.59 inHg

11:00 PM

Mostly clear night

77° 💧 None 💨 5 mph H 31%29.68 inHg

Saturday

2:00 AM

Clear night

72° 💧 None 💨 5 mph H 39%29.71 inHg

5:00 AM

Clear night

67° 💧 None 💨 3 mph H 53%29.74 inHg

8:00 AM

Sunny

74° 💧 None 💨 4 mph H 42%29.77 inHg

11:00 AM

Sunny

86° 💧 None 💨 9 mph H 31%29.77 inHg

2:00 PM

Sunny

96° 💧 None 💨 7 mph H 21%29.74 inHg

5:00 PM

Sunny

100° 💧 None 💨 5 mph H 14%29.68 inHg

8:00 PM

Clear night

84° 💧 None 💨 6 mph H 32%29.74 inHg

Today

11:00 PM

Clear night

67° 💧 None 💨 7 mph H 68%29.83 inHg

Tomorrow

12:00 AM

Clear night

67° 💧 None 💨 9 mph H 70%29.83 inHg

1:00 AM

Clear night

67° 💧 None 💨 7 mph H 74%29.80 inHg

2:00 AM

Partly cloudy night

66° 💧 None 💨 7 mph H 74%29.80 inHg

3:00 AM

Mostly cloudy night

65° 💧 None 💨 8 mph H 75%29.80 inHg

4:00 AM

Mostly cloudy night

66° 💧 None 💨 9 mph H 75%29.80 inHg

5:00 AM

Mostly cloudy night

66° 💧 None 💨 9 mph H 77%29.80 inHg

6:00 AM

Mostly cloudy night

64° 💧 None 💨 8 mph H 80%29.80 inHg

7:00 AM

Mostly sunny

66° 💧 None 💨 9 mph H 76%29.80 inHg

8:00 AM

Partly cloudy

70° 💧 None 💨 14 mph H 62%29.80 inHg

9:00 AM

Partly cloudy

73° 💧 None 💨 17 mph H 48%29.77 inHg

10:00 AM

Partly cloudy

79° 💧 None 💨 20 mph H 37%29.74 inHg

11:00 AM

Partly cloudy

84° 💧 None 💨 21 mph H 30%29.71 inHg

12:00 PM

Mostly sunny

89° 💧 None 💨 21 mph H 24%29.68 inHg

1:00 PM

Sunny

92° 💧 None 💨 19 mph H 19%29.65 inHg

2:00 PM

Sunny

95° 💧 None 💨 18 mph H 15%29.62 inHg

3:00 PM

Sunny

98° 💧 None 💨 16 mph H 13%29.59 inHg

4:00 PM

Sunny

99° 💧 None 💨 15 mph H 11%29.56 inHg

5:00 PM

Sunny

99° 💧 None 💨 14 mph H 10%29.56 inHg

6:00 PM

Mostly sunny

96° 💧 None 💨 9 mph H 11%29.53 inHg

7:00 PM

Mostly cloudy

91° 💧 None 💨 3 mph H 14%29.56 inHg

8:00 PM

Partly cloudy night

85° 💧 None 💨 8 mph H 17%29.59 inHg

9:00 PM

Mostly clear night

83° 💧 None 💨 2 mph H 24%29.62 inHg

10:00 PM

Mostly clear night

80° 💧 None 💨 6 mph H 28%29.65 inHg

11:00 PM

Mostly clear night

77° 💧 None 💨 5 mph H 31%29.68 inHg

Saturday

12:00 AM

Clear night

76° 💧 None 💨 5 mph H 31%29.68 inHg

1:00 AM

Clear night

74° 💧 None 💨 5 mph H 34%29.71 inHg

2:00 AM

Clear night

72° 💧 None 💨 5 mph H 39%29.71 inHg

3:00 AM

Clear night

70° 💧 None 💨 5 mph H 45%29.71 inHg

4:00 AM

Clear night

68° 💧 None 💨 4 mph H 50%29.74 inHg

5:00 AM

Clear night

67° 💧 None 💨 3 mph H 53%29.74 inHg

6:00 AM

Clear night

69° 💧 None 💨 0 mph H 52%29.74 inHg

7:00 AM

Sunny

69° 💧 None 💨 3 mph H 49%29.77 inHg

8:00 AM

Sunny

74° 💧 None 💨 4 mph H 42%29.77 inHg

9:00 AM

Sunny

78° 💧 None 💨 7 mph H 38%29.80 inHg

10:00 AM

Sunny

82° 💧 None 💨 6 mph H 35%29.80 inHg

11:00 AM

Sunny

86° 💧 None 💨 9 mph H 31%29.77 inHg

12:00 PM

Sunny

90° 💧 None 💨 8 mph H 27%29.77 inHg

1:00 PM

Sunny

93° 💧 None 💨 7 mph H 24%29.77 inHg

2:00 PM

Sunny

96° 💧 None 💨 7 mph H 21%29.74 inHg

3:00 PM

Sunny

98° 💧 None 💨 7 mph H 18%29.71 inHg

4:00 PM

Sunny

99° 💧 None 💨 5 mph H 16%29.71 inHg

5:00 PM

Sunny

100° 💧 None 💨 5 mph H 14%29.68 inHg

6:00 PM

Sunny

99° 💧 None 💨 6 mph H 15%29.68 inHg

7:00 PM

Sunny

91° 💧 None 💨 5 mph H 21%29.71 inHg

8:00 PM

Clear night

84° 💧 None 💨 6 mph H 32%29.74 inHg

9:00 PM

Clear night

81° 💧 None 💨 8 mph H 36%29.74 inHg

10:00 PM

Clear night

78° 💧 None 💨 7 mph H 42%29.77 inHg

11:00 PM

Mostly clear night

78° 💧 None 💨 6 mph H 47%29.77 inHg

Sunday

12:00 AM

Partly cloudy night

78° 💧 None 💨 7 mph H 48%29.77 inHg

1:00 AM

Partly cloudy night

74° 💧 None 💨 5 mph H 56%29.80 inHg

2:00 AM

Mostly cloudy night

75° 💧 None 💨 5 mph H 57%29.77 inHg

3:00 AM

Mostly cloudy night

72° 💧 None 💨 7 mph H 67%29.80 inHg

4:00 AM

Mostly cloudy night

71° 💧 None 💨 8 mph H 69%29.80 inHg

5:00 AM

Mostly cloudy night

71° 💧 None 💨 7 mph H 70%29.80 inHg

6:00 AM

Mostly cloudy night

71° 💧 None 💨 7 mph H 71%29.80 inHg

7:00 AM

Sunny

70° 💧 None 💨 6 mph H 73%29.80 inHg

8:00 AM

Light rain

73° 💧 0.02 in 💨 11 mph H 65%29.83 inHg

9:00 AM

Mostly sunny

78° 💧 None 💨 12 mph H 49%29.83 inHg

10:00 AM

Mostly sunny

82° 💧 None 💨 8 mph H 41%29.80 inHg

11:00 AM

Mostly sunny

85° 💧 None 💨 5 mph H 34%29.80 inHg

12:00 PM

Mostly sunny

89° 💧 None 💨 3 mph H 30%29.80 inHg

1:00 PM

Sunny

91° 💧 None 💨 6 mph H 27%29.77 inHg

2:00 PM

Mostly sunny

94° 💧 None 💨 9 mph H 25%29.77 inHg

3:00 PM

Mostly sunny

95° 💧 None 💨 10 mph H 23%29.74 inHg

4:00 PM

Partly cloudy

95° 💧 None 💨 9 mph H 24%29.71 inHg

5:00 PM

Mostly sunny

95° 💧 None 💨 11 mph H 28%29.71 inHg

6:00 PM

Mostly sunny

93° 💧 None 💨 13 mph H 31%29.71 inHg

7:00 PM

Sunny

89° 💧 None 💨 15 mph H 36%29.71 inHg

8:00 PM

Partly cloudy night

83° 💧 None 💨 14 mph H 44%29.74 inHg

9:00 PM

Mostly cloudy night

81° 💧 None 💨 12 mph H 47%29.71 inHg

10:00 PM

Light rain

78° 💧 0.02 in 💨 17 mph H 57%29.74 inHg

11:00 PM

Light rain

77° 💧 0.01 in 💨 16 mph H 68%29.71 inHg

Monday

12:00 AM

Mostly cloudy night

76° 💧 None 💨 15 mph H 67%29.71 inHg

1:00 AM

Overcast night

77° 💧 None 💨 13 mph H 56%29.68 inHg

2:00 AM

Overcast night

77° 💧 None 💨 13 mph H 60%29.65 inHg

3:00 AM

Overcast night

81° 💧 None 💨 11 mph H 53%29.62 inHg

4:00 AM

Light rain

79° 💧 0.00 in 💨 11 mph H 55%29.62 inHg

5:00 AM

Light rain

77° 💧 0.00 in 💨 6 mph H 59%29.65 inHg

6:00 AM

Moderate rain

72° 💧 0.05 in 💨 13 mph H 75%29.68 inHg

7:00 AM

Light rain

70° 💧 0.01 in 💨 7 mph H 86%29.65 inHg

8:00 AM

Overcast

71° 💧 None 💨 8 mph H 84%29.65 inHg

9:00 AM

Light rain

71° 💧 0.01 in 💨 6 mph H 82%29.65 inHg

10:00 AM

Overcast

72° 💧 None 💨 6 mph H 78%29.59 inHg

11:00 AM

Overcast

73° 💧 None 💨 4 mph H 74%29.62 inHg

12:00 PM

Overcast

82° 💧 None 💨 10 mph H 50%29.59 inHg

1:00 PM

Mostly sunny

85° 💧 None 💨 11 mph H 43%29.59 inHg

2:00 PM

Mostly sunny

88° 💧 None 💨 13 mph H 34%29.56 inHg

3:00 PM

Mostly sunny

88° 💧 None 💨 18 mph H 31%29.56 inHg

4:00 PM

Mostly sunny

87° 💧 None 💨 18 mph H 30%29.59 inHg

5:00 PM

Sunny

86° 💧 None 💨 15 mph H 28%29.59 inHg

6:00 PM

Sunny

85° 💧 None 💨 12 mph H 30%29.59 inHg

7:00 PM

Sunny

81° 💧 None 💨 8 mph H 36%29.62 inHg

8:00 PM

Clear night

76° 💧 None 💨 8 mph H 43%29.65 inHg

9:00 PM

Clear night

75° 💧 None 💨 7 mph H 46%29.68 inHg

10:00 PM

Clear night

74° 💧 None 💨 13 mph H 50%29.68 inHg

In Sidney and, more broadly, across the state of Montana: The evening will feature a mix of sun and clouds with mild temperatures around 65 degrees Fahrenheit. Winds will be light, coming from the south at up to 4 mph, with occasional gusts reaching 6 mph. No precipitation is expected during this time, so conditions should remain dry. As the night progresses, temperatures are expected to stay steady, maintaining a comfortable feel. Overall, it looks like a calm and pleasant evening with mild weather and gentle breezes.

15-Day Weather Outlook for Sidney

TomorrowTomorrow

Mostly sunny 99°/64° 💧 None 💨 21 mph

Saturday, Sep 5Sat Sep 5

Sunny 100°/67° 💧 None 💨 9 mph

Sunday, Sep 6Sun Sep 6

Light rain 95°/70° 💧 0.02 in 💨 15 mph

Monday, Sep 7Mon Sep 7

Light rain 88°/71° 💧 0.11 in 💨 18 mph

Tuesday, Sep 8Tue Sep 8

Light rain 79°/64° 💧 0.05 in 💨 21 mph

Wednesday, Sep 9Wed Sep 9

Mostly cloudy 80°/61° 💧 None 💨 10 mph

Thursday, Sep 10Thu Sep 10

Overcast 87°/64° 💧 None 💨 14 mph

Friday, Sep 11Fri Sep 11

Mostly cloudy 94°/71° 💧 None 💨 17 mph

Saturday, Sep 12Sat Sep 12

Light rain 88°/71° 💧 0.10 in 💨 14 mph

Sunday, Sep 13Sun Sep 13

Mostly cloudy 80°/65° 💧 None 💨 12 mph

Monday, Sep 14Mon Sep 14

Light rain 75°/64° 💧 0.11 in 💨 23 mph

Tuesday, Sep 15Tue Sep 15

Sunny 79°/58° 💧 None 💨 11 mph

Wednesday, Sep 16Wed Sep 16

Mostly cloudy 85°/59° 💧 None 💨 21 mph

Thursday, Sep 17Thu Sep 17

Overcast 68°/53° 💧 None 💨 8 mph

Friday, Sep 18Fri Sep 18

Sunny 80°/51° 💧 None 💨 13 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Sidney

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Sidney

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 11:00 PM

PM2.5 Fine particles Good 2,2µg/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 4,1µg/m³

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

O₃ Ozone Fair 83,2µg/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.

Air quality is acceptable for most people.

UV & HEALTH

UV, Sun & Health Outlook in Sidney

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 🙂Fair

Tomorrow UV 6,3High 🙂Fair

Saturday UV 6,3High 🙂Fair

Sunday UV 6,4High 🙂Fair

Monday UV 7,0High 🙂Fair

Tuesday UV 6,0High —Unavailable

Wednesday UV 5,0Moderate —Unavailable

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

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

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 Sidney

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

Internal PR simulation: 3.91 Population: 6,171

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Forecast data for Sidney were last refreshed today at 10:26 PM. The current forecast period extends through 05/09/2026 at 8:00 PM. 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.