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Current weather in Waterloo is clear sky.

Where can I find the hourly weather forecast for Waterloo?

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

Is the weather forecast for Waterloo updated regularly?

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

Now · 3:02 AM

Waterloo Weather & Hourly Forecast

United States · California · 95215

61°F

Clear night

Feels like: 61°F

💧 Humidity 79% 🌡 Pressure 29.91 inHg 💨 Wind 3 mph 👁 Visibility 16.8 mi ☁ Clouds 0% ☀️ UV index 0.0 · Low 🌅 Sunrise 6:52 AM 🌇 Sunset 7:01 PM

Hourly Forecast for Waterloo

Today

4:00 AM

Clear night

60° 💧 None 💨 3 mph H 82%29.91 inHg

7:00 AM

Sunny

57° 💧 None 💨 2 mph H 92%29.91 inHg

10:00 AM

Sunny

70° 💧 None 💨 2 mph H 59%29.94 inHg

1:00 PM

Sunny

85° 💧 None 💨 4 mph H 32%29.91 inHg

4:00 PM

Sunny

92° 💧 None 💨 4 mph H 23%29.83 inHg

7:00 PM

Sunny

85° 💧 None 💨 2 mph H 27%29.83 inHg

10:00 PM

Clear night

78° 💧 None 💨 5 mph H 37%29.85 inHg

Tomorrow

1:00 AM

Clear night

71° 💧 None 💨 2 mph H 54%29.85 inHg

4:00 AM

Clear night

66° 💧 None 💨 3 mph H 58%29.85 inHg

7:00 AM

Sunny

65° 💧 None 💨 0 mph H 61%29.85 inHg

10:00 AM

Partly cloudy

79° 💧 None 💨 1 mph H 39%29.88 inHg

1:00 PM

Mostly cloudy

92° 💧 None 💨 1 mph H 22%29.85 inHg

4:00 PM

Overcast

97° 💧 None 💨 5 mph H 17%29.80 inHg

7:00 PM

Partly cloudy night

87° 💧 None 💨 7 mph H 19%29.83 inHg

10:00 PM

Mostly clear night

74° 💧 None 💨 3 mph H 36%29.85 inHg

Friday

1:00 AM

Mostly cloudy night

68° 💧 None 💨 4 mph H 45%29.88 inHg

Today

4:00 AM

Clear night

60° 💧 None 💨 3 mph H 82%29.91 inHg

5:00 AM

Clear night

59° 💧 None 💨 3 mph H 85%29.91 inHg

6:00 AM

Clear night

58° 💧 None 💨 3 mph H 89%29.91 inHg

7:00 AM

Sunny

57° 💧 None 💨 2 mph H 92%29.91 inHg

8:00 AM

Sunny

60° 💧 None 💨 3 mph H 85%29.94 inHg

9:00 AM

Sunny

64° 💧 None 💨 2 mph H 73%29.94 inHg

10:00 AM

Sunny

70° 💧 None 💨 2 mph H 59%29.94 inHg

11:00 AM

Sunny

76° 💧 None 💨 3 mph H 48%29.94 inHg

12:00 PM

Sunny

81° 💧 None 💨 3 mph H 38%29.91 inHg

1:00 PM

Sunny

85° 💧 None 💨 4 mph H 32%29.91 inHg

2:00 PM

Sunny

89° 💧 None 💨 3 mph H 28%29.88 inHg

3:00 PM

Sunny

91° 💧 None 💨 4 mph H 25%29.85 inHg

4:00 PM

Sunny

92° 💧 None 💨 4 mph H 23%29.83 inHg

5:00 PM

Sunny

92° 💧 None 💨 5 mph H 22%29.83 inHg

6:00 PM

Sunny

90° 💧 None 💨 4 mph H 22%29.83 inHg

7:00 PM

Sunny

85° 💧 None 💨 2 mph H 27%29.83 inHg

8:00 PM

Clear night

83° 💧 None 💨 1 mph H 29%29.83 inHg

9:00 PM

Clear night

80° 💧 None 💨 2 mph H 32%29.85 inHg

10:00 PM

Clear night

78° 💧 None 💨 5 mph H 37%29.85 inHg

11:00 PM

Clear night

75° 💧 None 💨 5 mph H 46%29.85 inHg

Tomorrow

12:00 AM

Mostly clear night

72° 💧 None 💨 4 mph H 51%29.85 inHg

1:00 AM

Clear night

71° 💧 None 💨 2 mph H 54%29.85 inHg

2:00 AM

Clear night

69° 💧 None 💨 2 mph H 55%29.85 inHg

3:00 AM

Clear night

68° 💧 None 💨 3 mph H 56%29.85 inHg

4:00 AM

Clear night

66° 💧 None 💨 3 mph H 58%29.85 inHg

5:00 AM

Clear night

66° 💧 None 💨 2 mph H 60%29.85 inHg

6:00 AM

Clear night

66° 💧 None 💨 1 mph H 60%29.85 inHg

7:00 AM

Sunny

65° 💧 None 💨 0 mph H 61%29.85 inHg

8:00 AM

Mostly sunny

68° 💧 None 💨 3 mph H 58%29.88 inHg

9:00 AM

Mostly cloudy

73° 💧 None 💨 1 mph H 49%29.88 inHg

10:00 AM

Partly cloudy

79° 💧 None 💨 1 mph H 39%29.88 inHg

11:00 AM

Mostly sunny

84° 💧 None 💨 2 mph H 32%29.88 inHg

12:00 PM

Mostly sunny

88° 💧 None 💨 2 mph H 26%29.88 inHg

1:00 PM

Mostly cloudy

92° 💧 None 💨 1 mph H 22%29.85 inHg

2:00 PM

Mostly cloudy

95° 💧 None 💨 2 mph H 19%29.83 inHg

3:00 PM

Mostly cloudy

96° 💧 None 💨 4 mph H 18%29.80 inHg

4:00 PM

Overcast

97° 💧 None 💨 5 mph H 17%29.80 inHg

5:00 PM

Partly cloudy

96° 💧 None 💨 7 mph H 18%29.80 inHg

6:00 PM

Mostly sunny

93° 💧 None 💨 9 mph H 18%29.80 inHg

7:00 PM

Partly cloudy night

87° 💧 None 💨 7 mph H 19%29.83 inHg

8:00 PM

Partly cloudy night

82° 💧 None 💨 8 mph H 26%29.83 inHg

9:00 PM

Clear night

78° 💧 None 💨 4 mph H 30%29.85 inHg

10:00 PM

Mostly clear night

74° 💧 None 💨 3 mph H 36%29.85 inHg

11:00 PM

Partly cloudy night

71° 💧 None 💨 2 mph H 42%29.88 inHg

Friday

12:00 AM

Mostly cloudy night

69° 💧 None 💨 3 mph H 45%29.88 inHg

1:00 AM

Mostly cloudy night

68° 💧 None 💨 4 mph H 45%29.88 inHg

2:00 AM

Mostly cloudy night

67° 💧 None 💨 3 mph H 46%29.88 inHg

3:00 AM

Mostly cloudy night

65° 💧 None 💨 2 mph H 48%29.91 inHg

4:00 AM

Clear night

65° 💧 None 💨 1 mph H 50%29.91 inHg

5:00 AM

Clear night

64° 💧 None 💨 1 mph H 51%29.91 inHg

6:00 AM

Clear night

63° 💧 None 💨 2 mph H 53%29.91 inHg

7:00 AM

Sunny

62° 💧 None 💨 2 mph H 58%29.94 inHg

8:00 AM

Mostly sunny

65° 💧 None 💨 3 mph H 58%29.94 inHg

9:00 AM

Mostly sunny

69° 💧 None 💨 3 mph H 61%29.94 inHg

10:00 AM

Sunny

73° 💧 None 💨 5 mph H 58%29.94 inHg

11:00 AM

Sunny

78° 💧 None 💨 5 mph H 52%29.94 inHg

12:00 PM

Sunny

82° 💧 None 💨 6 mph H 45%29.94 inHg

1:00 PM

Sunny

85° 💧 None 💨 6 mph H 38%29.91 inHg

2:00 PM

Sunny

87° 💧 None 💨 6 mph H 32%29.91 inHg

3:00 PM

Mostly sunny

88° 💧 None 💨 7 mph H 27%29.88 inHg

4:00 PM

Partly cloudy

88° 💧 None 💨 7 mph H 24%29.88 inHg

5:00 PM

Partly cloudy

88° 💧 None 💨 6 mph H 22%29.85 inHg

8:00 PM

Clear night

77° 💧 None 💨 6 mph H 31%29.88 inHg

11:00 PM

Clear night

69° 💧 None 💨 3 mph H 44%29.88 inHg

Saturday

2:00 AM

Clear night

65° 💧 None 💨 2 mph H 54%29.88 inHg

5:00 AM

Clear night

61° 💧 None 💨 4 mph H 63%29.88 inHg

8:00 AM

Sunny

61° 💧 None 💨 4 mph H 72%29.88 inHg

11:00 AM

Sunny

75° 💧 None 💨 5 mph H 33%29.88 inHg

2:00 PM

Partly cloudy

85° 💧 None 💨 3 mph H 18%29.85 inHg

5:00 PM

Mostly cloudy

86° 💧 None 💨 4 mph H 18%29.80 inHg

8:00 PM

Mostly cloudy night

74° 💧 None 💨 8 mph H 30%29.83 inHg

11:00 PM

Partly cloudy night

65° 💧 None 💨 5 mph H 57%29.88 inHg

Sunday

2:00 AM

Partly cloudy night

61° 💧 None 💨 2 mph H 66%29.85 inHg

5:00 AM

Partly cloudy night

58° 💧 None 💨 3 mph H 76%29.85 inHg

8:00 AM

Mostly cloudy

58° 💧 None 💨 2 mph H 78%29.91 inHg

11:00 AM

Mostly cloudy

68° 💧 None 💨 4 mph H 49%29.94 inHg

2:00 PM

Sunny

78° 💧 None 💨 5 mph H 30%29.91 inHg

5:00 PM

Sunny

78° 💧 None 💨 7 mph H 30%29.88 inHg

8:00 PM

Clear night

66° 💧 None 💨 7 mph H 52%29.88 inHg

11:00 PM

Clear night

59° 💧 None 💨 3 mph H 72%29.94 inHg

Monday

2:00 AM

Clear night

56° 💧 None 💨 2 mph H 86%29.94 inHg

5:00 AM

Clear night

54° 💧 None 💨 3 mph H 92%29.94 inHg

8:00 AM

Mostly sunny

56° 💧 None 💨 4 mph H 92%29.97 inHg

11:00 AM

Sunny

71° 💧 None 💨 5 mph H 49%29.97 inHg

2:00 PM

Sunny

86° 💧 None 💨 7 mph H 21%29.88 inHg

5:00 PM

Sunny

90° 💧 None 💨 8 mph H 12%29.83 inHg

11:00 PM

Clear night

72° 💧 None 💨 7 mph H 36%29.85 inHg

Tuesday

5:00 AM

Clear night

62° 💧 None 💨 0 mph H 53%29.85 inHg

11:00 AM

Sunny

80° 💧 None 💨 1 mph H 25%29.88 inHg

5:00 PM

Sunny

94° 💧 None 💨 4 mph H 10%29.80 inHg

11:00 PM

Clear night

74° 💧 None 💨 3 mph H 37%29.83 inHg

Wednesday

5:00 AM

Clear night

63° 💧 None 💨 4 mph H 55%29.83 inHg

11:00 AM

Sunny

80° 💧 None 💨 1 mph H 31%29.88 inHg

5:00 PM

Sunny

95° 💧 None 💨 2 mph H 11%29.77 inHg

11:00 PM

Clear night

77° 💧 None 💨 2 mph H 22%29.80 inHg

Thursday

5:00 AM

Mostly cloudy night

67° 💧 None 💨 3 mph H 46%29.80 inHg

11:00 AM

Mostly sunny

82° 💧 None 💨 2 mph H 29%29.85 inHg

5:00 PM

Overcast

93° 💧 None 💨 4 mph H 14%29.77 inHg

11:00 PM

Clear night

72° 💧 None 💨 2 mph H 40%29.83 inHg

Friday

5:00 AM

Clear night

61° 💧 None 💨 3 mph H 64%29.80 inHg

11:00 AM

Overcast

77° 💧 None 💨 3 mph H 39%29.83 inHg

5:00 PM

Sunny

94° 💧 None 💨 4 mph H 12%29.74 inHg

11:00 PM

Clear night

74° 💧 None 💨 4 mph H 37%29.80 inHg

Saturday

5:00 AM

Clear night

64° 💧 None 💨 3 mph H 53%29.80 inHg

11:00 AM

Sunny

81° 💧 None 💨 3 mph H 31%29.85 inHg

5:00 PM

Sunny

97° 💧 None 💨 2 mph H 11%29.77 inHg

11:00 PM

Clear night

76° 💧 None 💨 5 mph H 33%29.83 inHg

Sunday

5:00 AM

Clear night

66° 💧 None 💨 3 mph H 52%29.83 inHg

11:00 AM

Sunny

85° 💧 None 💨 2 mph H 28%29.88 inHg

5:00 PM

Sunny

100° 💧 None 💨 4 mph H 9%29.80 inHg

11:00 PM

Clear night

80° 💧 None 💨 4 mph H 25%29.83 inHg

Monday

5:00 AM

Clear night

70° 💧 None 💨 4 mph H 41%29.83 inHg

11:00 AM

Sunny

86° 💧 None 💨 2 mph H 23%29.88 inHg

5:00 PM

Sunny

100° 💧 None 💨 5 mph H 11%29.77 inHg

11:00 PM

Clear night

75° 💧 None 💨 4 mph H 29%29.85 inHg

Tuesday

5:00 AM

Clear night

65° 💧 None 💨 3 mph H 56%29.85 inHg

11:00 AM

Sunny

81° 💧 None 💨 2 mph H 30%29.91 inHg

5:00 PM

Sunny

95° 💧 None 💨 6 mph H 11%29.83 inHg

11:00 PM

Clear night

75° 💧 None 💨 7 mph H 32%29.88 inHg

Wednesday

5:00 AM

Clear night

64° 💧 None 💨 3 mph H 53%29.91 inHg

11:00 AM

Sunny

79° 💧 None 💨 5 mph H 28%29.97 inHg

5:00 PM

Sunny

87° 💧 None 💨 10 mph H 21%29.88 inHg

In Waterloo and, more broadly, across the state of California: Tonight, expect mostly cloudy skies with mild to warm temperatures ranging from 73 to 80 degrees Fahrenheit. Winds will be light, coming from the west at around 9 mph, with occasional gusts reaching up to 16 mph. No precipitation is forecast for the evening and the early night hours, so outdoor plans should be comfortable. Temperatures may gradually cool into the lower 70s later in the night, but overall, conditions will remain mild. The wind remains gentle, providing a slight breeze without causing concern. Overall, it should be a pleasant evening with no weather-related disruptions.

15-Day Weather Outlook for Waterloo

Wednesday, Sep 23Wed Sep 23

Sunny 92°/57° 💧 None 💨 6 mph

TomorrowTomorrow

Mostly sunny 96°/64° 💧 None 💨 9 mph

Friday, Sep 25Fri Sep 25

Partly cloudy 87°/64° 💧 None 💨 7 mph

Saturday, Sep 26Sat Sep 26

Partly cloudy 86°/61° 💧 None 💨 8 mph

Sunday, Sep 27Sun Sep 27

Partly cloudy 84°/57° 💧 None 💨 5 mph

Monday, Sep 28Mon Sep 28

Sunny 85°/59° 💧 None 💨 7 mph

Tuesday, Sep 29Tue Sep 29

Sunny 88°/58° 💧 None 💨 5 mph

Wednesday, Sep 30Wed Sep 30

Sunny 85°/58° 💧 None 💨 9 mph

Thursday, Oct 1Thu Oct 1

Sunny 90°/65° 💧 None 💨 8 mph

Friday, Oct 2Fri Oct 2

Sunny 95°/63° 💧 None 💨 4 mph

Saturday, Oct 3Sat Oct 3

Sunny 98°/66° 💧 None 💨 3 mph

Sunday, Oct 4Sun Oct 4

Mostly sunny 92°/68° 💧 None 💨 7 mph

Monday, Oct 5Mon Oct 5

Mostly sunny 86°/59° 💧 None 💨 7 mph

Tuesday, Oct 6Tue Oct 6

Sunny 86°/66° 💧 None 💨 9 mph

Wednesday, Oct 7Wed Oct 7

Sunny 71°/58° 💧 None 💨 6 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Waterloo

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Waterloo

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 4:00 AM

PM2.5 Fine particles Good 7,0µg/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 16,7µg/m³

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

O₃ Ozone Good 44,8µg/m³

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

NO₂ Nitrogen dioxide Good 14,6µg/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 Waterloo

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 6,5High 😊Good

Tomorrow UV 6,3High 😷Poor

Friday UV 6,3High 😐Moderate

Saturday UV 6,2High 😐Moderate

Sunday UV 7,0High 🙂Fair

Monday UV 8,0Very high —Unavailable

Tuesday UV 8,0Very high —Unavailable

Hourly UV index today

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

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 Waterloo

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · WATERLOO, CALIFORNIA

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 4:00 AM–5:00 AM.

100/100Best-hour score

BEST TIME TONIGHT 4:00 AM–5:00 AM Astronomical darkness: 8:29 PM–5:25 AM

☁ Cloud cover 0% Real hourly forecast for the best viewing hour.

☾ Moonlight 89% Waxing Gibbous · Moon below the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant 66° 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 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

ACTIVE NOW

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

NOV 6–NOV 30

LeonidsStart NOV 6 · Peak NOV 17 · End NOV 30 · ZHR 15 · 52% 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

Explore current conditions and forecasts for other locations.

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Forecast data for Waterloo were last refreshed today at 3:02 AM. The current forecast period extends through 25/09/2026 at 1:00 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.