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Current weather in Thornton is overcast clouds.

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

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

Now · 5:49 PM

Thornton Weather & Hourly Forecast

United States · California · 95686

94°F

Overcast

Feels like: 85°F

💧 Humidity 17% 🌡 Pressure 29.83 inHg 💨 Wind 14 mph 👁 Visibility 22.1 mi ☁ Clouds 98% ☀️ UV index 1.7 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Thornton

Today

6:00 PM

Overcast

94° 💧 None 💨 14 mph H 17%29.83 inHg

9:00 PM

Clear night

82° 💧 None 💨 12 mph H 27%29.85 inHg

Tomorrow

12:00 AM

Clear night

75° 💧 None 💨 7 mph H 36%29.88 inHg

3:00 AM

Clear night

71° 💧 None 💨 5 mph H 43%29.88 inHg

6:00 AM

Clear night

65° 💧 None 💨 4 mph H 59%29.88 inHg

9:00 AM

Sunny

71° 💧 None 💨 6 mph H 52%29.91 inHg

12:00 PM

Sunny

83° 💧 None 💨 8 mph H 31%29.88 inHg

3:00 PM

Sunny

91° 💧 None 💨 10 mph H 22%29.83 inHg

6:00 PM

Sunny

85° 💧 None 💨 11 mph H 33%29.80 inHg

9:00 PM

Clear night

74° 💧 None 💨 10 mph H 46%29.83 inHg

Saturday

12:00 AM

Clear night

70° 💧 None 💨 5 mph H 55%29.85 inHg

3:00 AM

Clear night

66° 💧 None 💨 5 mph H 64%29.85 inHg

6:00 AM

Partly cloudy night

63° 💧 None 💨 6 mph H 71%29.85 inHg

9:00 AM

Sunny

68° 💧 None 💨 8 mph H 56%29.88 inHg

12:00 PM

Mostly sunny

78° 💧 None 💨 13 mph H 33%29.91 inHg

3:00 PM

Partly cloudy

80° 💧 None 💨 15 mph H 35%29.88 inHg

Today

6:00 PM

Overcast

94° 💧 None 💨 14 mph H 17%29.83 inHg

7:00 PM

Mostly cloudy

89° 💧 None 💨 14 mph H 20%29.83 inHg

8:00 PM

Partly cloudy night

85° 💧 None 💨 13 mph H 24%29.85 inHg

9:00 PM

Clear night

82° 💧 None 💨 12 mph H 27%29.85 inHg

10:00 PM

Clear night

79° 💧 None 💨 12 mph H 30%29.85 inHg

11:00 PM

Clear night

77° 💧 None 💨 10 mph H 34%29.88 inHg

Tomorrow

12:00 AM

Clear night

75° 💧 None 💨 7 mph H 36%29.88 inHg

1:00 AM

Clear night

73° 💧 None 💨 4 mph H 38%29.88 inHg

2:00 AM

Clear night

72° 💧 None 💨 5 mph H 40%29.88 inHg

3:00 AM

Clear night

71° 💧 None 💨 5 mph H 43%29.88 inHg

4:00 AM

Clear night

69° 💧 None 💨 5 mph H 48%29.88 inHg

5:00 AM

Clear night

67° 💧 None 💨 4 mph H 54%29.88 inHg

6:00 AM

Clear night

65° 💧 None 💨 4 mph H 59%29.88 inHg

7:00 AM

Sunny

64° 💧 None 💨 5 mph H 64%29.88 inHg

8:00 AM

Sunny

67° 💧 None 💨 6 mph H 60%29.91 inHg

9:00 AM

Sunny

71° 💧 None 💨 6 mph H 52%29.91 inHg

10:00 AM

Sunny

75° 💧 None 💨 7 mph H 42%29.88 inHg

11:00 AM

Sunny

79° 💧 None 💨 7 mph H 36%29.88 inHg

12:00 PM

Sunny

83° 💧 None 💨 8 mph H 31%29.88 inHg

1:00 PM

Sunny

88° 💧 None 💨 8 mph H 26%29.85 inHg

2:00 PM

Sunny

91° 💧 None 💨 9 mph H 22%29.85 inHg

3:00 PM

Sunny

91° 💧 None 💨 10 mph H 22%29.83 inHg

4:00 PM

Sunny

91° 💧 None 💨 11 mph H 24%29.80 inHg

5:00 PM

Sunny

88° 💧 None 💨 11 mph H 28%29.80 inHg

6:00 PM

Sunny

85° 💧 None 💨 11 mph H 33%29.80 inHg

7:00 PM

Sunny

80° 💧 None 💨 10 mph H 38%29.80 inHg

8:00 PM

Clear night

77° 💧 None 💨 10 mph H 43%29.80 inHg

9:00 PM

Clear night

74° 💧 None 💨 10 mph H 46%29.83 inHg

10:00 PM

Clear night

72° 💧 None 💨 9 mph H 49%29.83 inHg

11:00 PM

Clear night

71° 💧 None 💨 7 mph H 52%29.85 inHg

Saturday

12:00 AM

Clear night

70° 💧 None 💨 5 mph H 55%29.85 inHg

1:00 AM

Clear night

68° 💧 None 💨 5 mph H 58%29.85 inHg

2:00 AM

Clear night

67° 💧 None 💨 5 mph H 61%29.85 inHg

3:00 AM

Clear night

66° 💧 None 💨 5 mph H 64%29.85 inHg

4:00 AM

Clear night

65° 💧 None 💨 5 mph H 66%29.85 inHg

5:00 AM

Mostly clear night

64° 💧 None 💨 6 mph H 69%29.85 inHg

6:00 AM

Partly cloudy night

63° 💧 None 💨 6 mph H 71%29.85 inHg

7:00 AM

Mostly cloudy

62° 💧 None 💨 5 mph H 73%29.88 inHg

8:00 AM

Partly cloudy

65° 💧 None 💨 6 mph H 65%29.88 inHg

9:00 AM

Sunny

68° 💧 None 💨 8 mph H 56%29.88 inHg

10:00 AM

Mostly cloudy

72° 💧 None 💨 10 mph H 47%29.91 inHg

11:00 AM

Partly cloudy

75° 💧 None 💨 12 mph H 40%29.91 inHg

12:00 PM

Mostly sunny

78° 💧 None 💨 13 mph H 33%29.91 inHg

1:00 PM

Mostly sunny

81° 💧 None 💨 13 mph H 31%29.91 inHg

2:00 PM

Partly cloudy

81° 💧 None 💨 14 mph H 32%29.88 inHg

3:00 PM

Partly cloudy

80° 💧 None 💨 15 mph H 35%29.88 inHg

4:00 PM

Mostly sunny

78° 💧 None 💨 16 mph H 37%29.88 inHg

5:00 PM

Sunny

76° 💧 None 💨 16 mph H 38%29.88 inHg

6:00 PM

Sunny

73° 💧 None 💨 16 mph H 43%29.88 inHg

7:00 PM

Sunny

69° 💧 None 💨 16 mph H 48%29.88 inHg

8:00 PM

Clear night

67° 💧 None 💨 14 mph H 55%29.91 inHg

9:00 PM

Clear night

65° 💧 None 💨 12 mph H 59%29.94 inHg

10:00 PM

Clear night

64° 💧 None 💨 11 mph H 62%29.94 inHg

11:00 PM

Clear night

63° 💧 None 💨 10 mph H 66%29.94 inHg

Sunday

12:00 AM

Clear night

61° 💧 None 💨 10 mph H 69%29.94 inHg

1:00 AM

Clear night

60° 💧 None 💨 9 mph H 72%29.94 inHg

2:00 AM

Clear night

60° 💧 None 💨 8 mph H 73%29.97 inHg

3:00 AM

Clear night

59° 💧 None 💨 7 mph H 73%29.97 inHg

4:00 AM

Clear night

58° 💧 None 💨 6 mph H 74%29.97 inHg

5:00 AM

Clear night

57° 💧 None 💨 6 mph H 75%29.97 inHg

2:00 PM

Sunny

81° 💧 None 💨 7 mph H 21%29.94 inHg

5:00 PM

Sunny

83° 💧 None 💨 6 mph H 18%29.88 inHg

8:00 PM

Clear night

72° 💧 None 💨 9 mph H 41%29.88 inHg

11:00 PM

Clear night

65° 💧 None 💨 10 mph H 60%29.91 inHg

Monday

2:00 AM

Clear night

61° 💧 None 💨 7 mph H 68%29.88 inHg

5:00 AM

Clear night

58° 💧 None 💨 5 mph H 77%29.88 inHg

8:00 AM

Sunny

62° 💧 None 💨 8 mph H 64%29.91 inHg

11:00 AM

Sunny

78° 💧 None 💨 7 mph H 26%29.88 inHg

2:00 PM

Sunny

89° 💧 None 💨 6 mph H 15%29.80 inHg

5:00 PM

Sunny

87° 💧 None 💨 12 mph H 21%29.77 inHg

8:00 PM

Clear night

75° 💧 None 💨 10 mph H 39%29.77 inHg

11:00 PM

Clear night

67° 💧 None 💨 10 mph H 55%29.80 inHg

Tuesday

2:00 AM

Clear night

62° 💧 None 💨 6 mph H 70%29.83 inHg

5:00 AM

Clear night

59° 💧 None 💨 5 mph H 84%29.83 inHg

8:00 AM

Sunny

59° 💧 None 💨 5 mph H 84%29.85 inHg

11:00 AM

Sunny

75° 💧 None 💨 5 mph H 46%29.88 inHg

2:00 PM

Sunny

86° 💧 None 💨 6 mph H 25%29.83 inHg

5:00 PM

Sunny

86° 💧 None 💨 10 mph H 27%29.80 inHg

8:00 PM

Clear night

70° 💧 None 💨 12 mph H 54%29.83 inHg

11:00 PM

Clear night

63° 💧 None 💨 11 mph H 69%29.85 inHg

Wednesday

2:00 AM

Clear night

60° 💧 None 💨 10 mph H 83%29.88 inHg

5:00 AM

Mostly clear night

58° 💧 None 💨 7 mph H 90%29.88 inHg

8:00 AM

Mostly sunny

59° 💧 None 💨 8 mph H 86%29.94 inHg

11:00 AM

Overcast

72° 💧 None 💨 7 mph H 51%29.97 inHg

5:00 PM

Mostly sunny

71° 💧 None 💨 5 mph H 53%29.97 inHg

11:00 PM

Mostly clear night

86° 💧 None 💨 6 mph H 24%29.88 inHg

Thursday

5:00 AM

Clear night

61° 💧 None 💨 10 mph H 78%29.91 inHg

11:00 AM

Mostly sunny

56° 💧 None 💨 7 mph H 94%29.94 inHg

5:00 PM

Sunny

72° 💧 None 💨 8 mph H 50%30.00 inHg

11:00 PM

Clear night

81° 💧 None 💨 12 mph H 32%29.94 inHg

Friday

5:00 AM

Clear night

62° 💧 None 💨 12 mph H 77%30.00 inHg

11:00 AM

Sunny

58° 💧 None 💨 10 mph H 89%30.03 inHg

5:00 PM

Sunny

71° 💧 None 💨 10 mph H 52%30.06 inHg

11:00 PM

Clear night

80° 💧 None 💨 12 mph H 32%29.97 inHg

Saturday

5:00 AM

Clear night

62° 💧 None 💨 13 mph H 77%30.00 inHg

11:00 AM

Mostly sunny

59° 💧 None 💨 10 mph H 92%30.00 inHg

5:00 PM

Sunny

71° 💧 None 💨 11 mph H 54%30.03 inHg

11:00 PM

Clear night

80° 💧 None 💨 12 mph H 33%29.91 inHg

Sunday

5:00 AM

Clear night

63° 💧 None 💨 11 mph H 78%29.91 inHg

11:00 AM

Sunny

58° 💧 None 💨 8 mph H 91%29.91 inHg

5:00 PM

Sunny

71° 💧 None 💨 7 mph H 53%29.97 inHg

11:00 PM

Clear night

85° 💧 None 💨 6 mph H 25%29.85 inHg

Monday

5:00 AM

Clear night

66° 💧 None 💨 9 mph H 64%29.88 inHg

11:00 AM

Sunny

58° 💧 None 💨 6 mph H 89%29.91 inHg

5:00 PM

Sunny

73° 💧 None 💨 7 mph H 51%29.94 inHg

11:00 PM

Clear night

84° 💧 None 💨 12 mph H 31%29.88 inHg

Tuesday

5:00 AM

Clear night

63° 💧 None 💨 9 mph H 70%29.91 inHg

11:00 AM

Mostly sunny

57° 💧 None 💨 6 mph H 93%29.88 inHg

5:00 PM

Sunny

72° 💧 None 💨 6 mph H 49%29.88 inHg

11:00 PM

Clear night

85° 💧 None 💨 9 mph H 23%29.77 inHg

Wednesday

5:00 AM

Clear night

66° 💧 None 💨 7 mph H 69%29.80 inHg

11:00 AM

Sunny

57° 💧 None 💨 9 mph H 93%29.77 inHg

5:00 PM

Sunny

74° 💧 None 💨 1 mph H 47%29.80 inHg

11:00 PM

Clear night

88° 💧 None 💨 4 mph H 24%29.74 inHg

Thursday

5:00 AM

Clear night

66° 💧 None 💨 11 mph H 59%29.80 inHg

11:00 AM

Sunny

60° 💧 None 💨 4 mph H 82%29.83 inHg

5:00 PM

Sunny

76° 💧 None 💨 4 mph H 44%29.88 inHg

11:00 PM

Clear night

90° 💧 None 💨 2 mph H 18%29.77 inHg

Friday

5:00 AM

Partly cloudy night

67° 💧 None 💨 9 mph H 64%29.80 inHg

11:00 AM

Moderate rain

64° 💧 None 💨 6 mph H 78%29.85 inHg

In Thornton and, more broadly, across the state of California: As the afternoon progresses into the evening, temperatures will remain very hot, ranging from the upper 80s to the low 100s. The sky will be mostly sunny with a few clouds, providing brief relief from the direct sun. Winds from the northwest will be moderate, generally blowing around 10 to 17 mph, with gusts reaching up to 32 mph. No rain is expected during this time, so the dry conditions will continue into the evening. Temperatures will gradually cool but remain quite warm through the evening hours. It’s advisable to stay hydrated and take precautions against the heat if you're planning to be outdoors. The wind may cause some gusty conditions, especially in open areas, so secure any loose objects accordingly.

15-Day Weather Outlook for Thornton

Saturday, Sep 12Sat Sep 12

Mostly sunny 88°/62° 💧 None 💨 16 mph

Sunday, Sep 13Sun Sep 13

Sunny 81°/57° 💧 None 💨 16 mph

Monday, Sep 14Mon Sep 14

Sunny 89°/58° 💧 None 💨 10 mph

Tuesday, Sep 15Tue Sep 15

Sunny 87°/59° 💧 None 💨 12 mph

Wednesday, Sep 16Wed Sep 16

Mostly sunny 86°/58° 💧 None 💨 12 mph

Thursday, Sep 17Thu Sep 17

Mostly sunny 86°/56° 💧 0.001 in 💨 10 mph

Friday, Sep 18Fri Sep 18

Sunny 81°/58° 💧 None 💨 12 mph

Saturday, Sep 19Sat Sep 19

Mostly sunny 80°/59° 💧 None 💨 13 mph

Sunday, Sep 20Sun Sep 20

Sunny 80°/58° 💧 None 💨 12 mph

Monday, Sep 21Mon Sep 21

Sunny 85°/58° 💧 None 💨 9 mph

Tuesday, Sep 22Tue Sep 22

Mostly sunny 84°/57° 💧 None 💨 12 mph

Wednesday, Sep 23Wed Sep 23

Sunny 85°/57° 💧 None 💨 9 mph

Thursday, Sep 24Thu Sep 24

Sunny 88°/60° 💧 None 💨 11 mph

Friday, Sep 25Fri Sep 25

Moderate rain 90°/64° 💧 0.039 in 💨 9 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Thornton

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Thornton

Hourly forecast · Updated every 2 hours

Moderate

Nearest forecast value 6:00 PM

PM2.5 Fine particles Fair 11,1µg/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 Fair 20,4µg/m³

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

O₃ Ozone Moderate 105,5µg/m³

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

NO₂ Nitrogen dioxide Good 3,9µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Sensitive people should reduce strenuous and prolonged outdoor exertion.

UV & HEALTH

UV, Sun & Health Outlook in Thornton

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 8,2Very high 😐Moderate

Tomorrow UV 7,7High 😐Moderate

Saturday UV 8,0Very high 😐Moderate

Sunday UV 7,0High 😐Moderate

Monday UV 6,5High 😐Moderate

Tuesday UV 8,0Very high —Unavailable

Wednesday UV 8,0Very high —Unavailable

Hourly UV index today

6:00 PMUV 0,5 7:00 PMUV 0,0

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

Very high UV risk

Use SPF 50+ sunscreen, a hat and sunglasses. Seek shade and limit exposure around midday.

Caution for sensitive people

People with respiratory or cardiovascular conditions should reduce prolonged outdoor exertion.

High heat

Stay hydrated and avoid intense exercise during the hottest part of the day. Dry air can increase hydration needs.

Best in the morning or late in the day

For walking, running or cycling, prefer the early morning or late afternoon.

WIND OUTLOOK

Hourly Wind Forecast for Thornton

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · THORNTON, CALIFORNIA

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 5:00 AM–6:00 AM.

100/100Best-hour score

BEST TIME TONIGHT 5:00 AM–6:00 AM Astronomical darkness: 8:51 PM–5:14 AM

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

☾ Moonlight 0% New Moon · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 88° high at the best hour.

✦ Estimated visible meteors 2–5/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min81%

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 Thornton were last refreshed today at 5:49 PM. The current forecast period extends through 12/09/2026 at 3:00 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.