What is the weather in Walnut right now?

Current weather in Walnut is few clouds.

Where can I find the hourly weather forecast for Walnut?

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

Is the weather forecast for Walnut updated regularly?

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

Now · 7:29 AM

Walnut Weather & Hourly Forecast

United States · California · 91789

65°F

Mostly sunny

Feels like: 68°F

💧 Humidity 97% 🌡 Pressure 29.85 inHg 💨 Wind 3 mph 👁 Visibility 5.0 mi ☁ Clouds 14% ☀️ UV index 0.0 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Walnut

Today

8:00 AM

Sunny

68° 💧 None 💨 2 mph H 88%29.85 inHg

11:00 AM

Sunny

81° 💧 None 💨 3 mph H 54%29.85 inHg

2:00 PM

Sunny

87° 💧 None 💨 6 mph H 41%29.80 inHg

5:00 PM

Sunny

81° 💧 None 💨 8 mph H 49%29.77 inHg

8:00 PM

Clear night

72° 💧 None 💨 5 mph H 70%29.83 inHg

11:00 PM

Clear night

68° 💧 None 💨 3 mph H 81%29.85 inHg

Tomorrow

2:00 AM

Clear night

65° 💧 None 💨 3 mph H 91%29.85 inHg

5:00 AM

Clear night

63° 💧 None 💨 2 mph H 96%29.85 inHg

8:00 AM

Sunny

67° 💧 None 💨 2 mph H 84%29.91 inHg

11:00 AM

Sunny

79° 💧 None 💨 4 mph H 48%29.91 inHg

2:00 PM

Sunny

84° 💧 None 💨 7 mph H 42%29.88 inHg

5:00 PM

Sunny

78° 💧 None 💨 7 mph H 55%29.85 inHg

8:00 PM

Clear night

70° 💧 None 💨 5 mph H 74%29.88 inHg

11:00 PM

Clear night

67° 💧 None 💨 2 mph H 82%29.94 inHg

Wednesday

2:00 AM

Clear night

65° 💧 None 💨 1 mph H 88%29.94 inHg

5:00 AM

Clear night

63° 💧 None 💨 2 mph H 94%29.94 inHg

Today

8:00 AM

Sunny

68° 💧 None 💨 2 mph H 88%29.85 inHg

9:00 AM

Sunny

72° 💧 None 💨 2 mph H 75%29.85 inHg

10:00 AM

Sunny

77° 💧 None 💨 2 mph H 64%29.85 inHg

11:00 AM

Sunny

81° 💧 None 💨 3 mph H 54%29.85 inHg

12:00 PM

Sunny

84° 💧 None 💨 3 mph H 46%29.83 inHg

1:00 PM

Sunny

87° 💧 None 💨 5 mph H 41%29.80 inHg

2:00 PM

Sunny

87° 💧 None 💨 6 mph H 41%29.80 inHg

3:00 PM

Sunny

87° 💧 None 💨 7 mph H 42%29.77 inHg

4:00 PM

Sunny

85° 💧 None 💨 8 mph H 44%29.77 inHg

5:00 PM

Sunny

81° 💧 None 💨 8 mph H 49%29.77 inHg

6:00 PM

Sunny

78° 💧 None 💨 7 mph H 55%29.77 inHg

7:00 PM

Sunny

74° 💧 None 💨 7 mph H 63%29.80 inHg

8:00 PM

Clear night

72° 💧 None 💨 5 mph H 70%29.83 inHg

9:00 PM

Clear night

70° 💧 None 💨 5 mph H 74%29.85 inHg

10:00 PM

Clear night

69° 💧 None 💨 4 mph H 78%29.85 inHg

11:00 PM

Clear night

68° 💧 None 💨 3 mph H 81%29.85 inHg

Tomorrow

12:00 AM

Clear night

67° 💧 None 💨 3 mph H 85%29.85 inHg

1:00 AM

Clear night

66° 💧 None 💨 3 mph H 89%29.85 inHg

2:00 AM

Clear night

65° 💧 None 💨 3 mph H 91%29.85 inHg

3:00 AM

Clear night

65° 💧 None 💨 2 mph H 93%29.85 inHg

4:00 AM

Clear night

64° 💧 None 💨 2 mph H 95%29.85 inHg

5:00 AM

Clear night

63° 💧 None 💨 2 mph H 96%29.85 inHg

6:00 AM

Clear night

63° 💧 None 💨 2 mph H 97%29.88 inHg

7:00 AM

Sunny

63° 💧 None 💨 3 mph H 96%29.88 inHg

8:00 AM

Sunny

67° 💧 None 💨 2 mph H 84%29.91 inHg

9:00 AM

Sunny

72° 💧 None 💨 4 mph H 67%29.91 inHg

10:00 AM

Sunny

76° 💧 None 💨 4 mph H 55%29.94 inHg

11:00 AM

Sunny

79° 💧 None 💨 4 mph H 48%29.91 inHg

12:00 PM

Sunny

82° 💧 None 💨 5 mph H 44%29.91 inHg

1:00 PM

Sunny

84° 💧 None 💨 5 mph H 41%29.88 inHg

2:00 PM

Sunny

84° 💧 None 💨 7 mph H 42%29.88 inHg

3:00 PM

Sunny

82° 💧 None 💨 8 mph H 48%29.85 inHg

4:00 PM

Sunny

80° 💧 None 💨 8 mph H 52%29.85 inHg

5:00 PM

Sunny

78° 💧 None 💨 7 mph H 55%29.85 inHg

6:00 PM

Sunny

75° 💧 None 💨 6 mph H 60%29.85 inHg

7:00 PM

Clear night

72° 💧 None 💨 6 mph H 68%29.88 inHg

8:00 PM

Clear night

70° 💧 None 💨 5 mph H 74%29.88 inHg

9:00 PM

Clear night

69° 💧 None 💨 4 mph H 77%29.91 inHg

10:00 PM

Clear night

68° 💧 None 💨 3 mph H 80%29.94 inHg

11:00 PM

Clear night

67° 💧 None 💨 2 mph H 82%29.94 inHg

Wednesday

12:00 AM

Clear night

66° 💧 None 💨 2 mph H 83%29.94 inHg

1:00 AM

Clear night

65° 💧 None 💨 2 mph H 86%29.94 inHg

2:00 AM

Clear night

65° 💧 None 💨 1 mph H 88%29.94 inHg

3:00 AM

Clear night

64° 💧 None 💨 1 mph H 91%29.94 inHg

4:00 AM

Clear night

63° 💧 None 💨 2 mph H 93%29.94 inHg

5:00 AM

Clear night

63° 💧 None 💨 2 mph H 94%29.94 inHg

6:00 AM

Clear night

63° 💧 None 💨 2 mph H 95%29.94 inHg

7:00 AM

Sunny

63° 💧 None 💨 2 mph H 95%29.97 inHg

8:00 AM

Sunny

66° 💧 None 💨 3 mph H 83%29.97 inHg

9:00 AM

Mostly sunny

70° 💧 None 💨 4 mph H 72%30.00 inHg

10:00 AM

Mostly sunny

73° 💧 None 💨 4 mph H 61%30.00 inHg

11:00 AM

Sunny

76° 💧 None 💨 5 mph H 52%29.97 inHg

12:00 PM

Sunny

79° 💧 None 💨 5 mph H 44%29.97 inHg

1:00 PM

Sunny

81° 💧 None 💨 6 mph H 41%29.94 inHg

2:00 PM

Sunny

81° 💧 None 💨 7 mph H 41%29.94 inHg

3:00 PM

Sunny

81° 💧 None 💨 7 mph H 41%29.94 inHg

4:00 PM

Sunny

80° 💧 None 💨 7 mph H 43%29.91 inHg

5:00 PM

Sunny

78° 💧 None 💨 7 mph H 49%29.91 inHg

Thursday

2:00 AM

Clear night

64° 💧 None 💨 2 mph H 88%30.03 inHg

5:00 AM

Clear night

62° 💧 None 💨 1 mph H 94%30.03 inHg

8:00 AM

Sunny

65° 💧 None 💨 2 mph H 83%30.06 inHg

11:00 AM

Sunny

77° 💧 None 💨 3 mph H 47%30.06 inHg

2:00 PM

Sunny

84° 💧 None 💨 6 mph H 35%30.00 inHg

5:00 PM

Sunny

80° 💧 None 💨 9 mph H 44%29.97 inHg

8:00 PM

Clear night

71° 💧 None 💨 7 mph H 63%30.00 inHg

11:00 PM

Clear night

67° 💧 None 💨 3 mph H 75%30.03 inHg

Friday

2:00 AM

Clear night

64° 💧 None 💨 0 mph H 84%30.03 inHg

5:00 AM

Clear night

61° 💧 None 💨 0 mph H 91%30.00 inHg

8:00 AM

Sunny

65° 💧 None 💨 0 mph H 81%30.03 inHg

11:00 AM

Sunny

78° 💧 None 💨 2 mph H 50%30.03 inHg

2:00 PM

Sunny

85° 💧 None 💨 6 mph H 36%29.94 inHg

5:00 PM

Sunny

83° 💧 None 💨 8 mph H 39%29.91 inHg

8:00 PM

Clear night

74° 💧 None 💨 7 mph H 56%29.91 inHg

11:00 PM

Clear night

68° 💧 None 💨 2 mph H 73%29.94 inHg

Saturday

2:00 AM

Clear night

64° 💧 None 💨 1 mph H 87%29.94 inHg

5:00 AM

Clear night

61° 💧 None 💨 0 mph H 98%29.91 inHg

8:00 AM

Mostly sunny

64° 💧 None 💨 1 mph H 91%29.94 inHg

11:00 AM

Sunny

78° 💧 None 💨 3 mph H 49%29.91 inHg

2:00 PM

Sunny

87° 💧 None 💨 6 mph H 31%29.85 inHg

5:00 PM

Sunny

84° 💧 None 💨 8 mph H 35%29.83 inHg

8:00 PM

Clear night

74° 💧 None 💨 6 mph H 58%29.85 inHg

11:00 PM

Partly cloudy night

69° 💧 None 💨 4 mph H 76%29.88 inHg

Sunday

5:00 AM

Clear night

68° 💧 None 💨 3 mph H 73%29.88 inHg

11:00 AM

Mostly sunny

61° 💧 None 💨 2 mph H 94%29.88 inHg

5:00 PM

Sunny

76° 💧 None 💨 4 mph H 58%29.91 inHg

11:00 PM

Clear night

82° 💧 None 💨 9 mph H 49%29.83 inHg

Monday

5:00 AM

Clear night

68° 💧 None 💨 3 mph H 82%29.94 inHg

11:00 AM

Mostly cloudy

63° 💧 None 💨 1 mph H 96%29.91 inHg

5:00 PM

Sunny

78° 💧 None 💨 4 mph H 56%29.94 inHg

11:00 PM

Clear night

83° 💧 None 💨 8 mph H 48%29.83 inHg

Tuesday

5:00 AM

Clear night

68° 💧 None 💨 3 mph H 83%29.91 inHg

11:00 AM

Mostly cloudy

65° 💧 None 💨 2 mph H 97%29.88 inHg

5:00 PM

Mostly sunny

79° 💧 None 💨 5 mph H 58%29.88 inHg

11:00 PM

Clear night

80° 💧 None 💨 9 mph H 55%29.77 inHg

Wednesday

5:00 AM

Clear night

68° 💧 None 💨 4 mph H 84%29.85 inHg

11:00 AM

Mostly cloudy

65° 💧 None 💨 2 mph H 94%29.83 inHg

5:00 PM

Overcast

72° 💧 None 💨 4 mph H 74%29.88 inHg

11:00 PM

Overcast night

72° 💧 None 💨 7 mph H 72%29.85 inHg

Thursday

5:00 AM

Partly cloudy night

67° 💧 None 💨 3 mph H 80%29.91 inHg

11:00 AM

Overcast

65° 💧 None 💨 3 mph H 87%29.91 inHg

5:00 PM

Overcast

69° 💧 None 💨 4 mph H 75%29.97 inHg

11:00 PM

Mostly clear night

74° 💧 None 💨 6 mph H 61%29.88 inHg

Friday

5:00 AM

Mostly clear night

64° 💧 None 💨 2 mph H 88%29.97 inHg

11:00 AM

Mostly sunny

60° 💧 None 💨 1 mph H 96%29.97 inHg

5:00 PM

Sunny

74° 💧 None 💨 3 mph H 59%30.00 inHg

11:00 PM

Clear night

80° 💧 None 💨 8 mph H 47%29.88 inHg

Saturday

5:00 AM

Clear night

66° 💧 None 💨 1 mph H 85%29.97 inHg

11:00 AM

Mostly cloudy

60° 💧 None 💨 1 mph H 98%29.94 inHg

5:00 PM

Sunny

79° 💧 None 💨 4 mph H 54%29.97 inHg

11:00 PM

Clear night

87° 💧 None 💨 7 mph H 40%29.88 inHg

Sunday

5:00 AM

Mostly cloudy night

69° 💧 None 💨 1 mph H 81%29.94 inHg

11:00 AM

Overcast

65° 💧 None 💨 0 mph H 76%29.91 inHg

5:00 PM

Mostly sunny

85° 💧 None 💨 2 mph H 41%29.91 inHg

11:00 PM

Clear night

90° 💧 None 💨 8 mph H 35%29.80 inHg

Monday

5:00 AM

Clear night

71° 💧 None 💨 2 mph H 77%29.85 inHg

11:00 AM

Mostly cloudy

64° 💧 None 💨 1 mph H 98%29.83 inHg

5:00 PM

Sunny

85° 💧 None 💨 2 mph H 41%29.83 inHg

11:00 PM

Clear night

88° 💧 None 💨 8 mph H 33%29.71 inHg

In Walnut and, more broadly, across the state of California: This morning will start with mostly sunny skies and just a few clouds drifting through. Temperatures are expected to be warm, ranging from the mid-50s in the early hours to around 87 degrees Fahrenheit by the afternoon. The weather will remain dry throughout the day, with no precipitation anticipated. Winds will be light, coming from the northwest, with maximum speeds around 9 mph and occasional gusts up to 14 mph. Overall, it will be a warm and mostly sunny day with pleasant, light breezes. Be sure to stay hydrated and protect yourself from the sun during the hottest parts of the day.

15-Day Weather Outlook for Walnut

TomorrowTomorrow

Sunny 84°/63° 💧 None 💨 8 mph

Wednesday, Sep 16Wed Sep 16

Mostly sunny 81°/63° 💧 None 💨 7 mph

Thursday, Sep 17Thu Sep 17

Sunny 84°/62° 💧 None 💨 9 mph

Friday, Sep 18Fri Sep 18

Sunny 85°/61° 💧 None 💨 8 mph

Saturday, Sep 19Sat Sep 19

Mostly sunny 87°/61° 💧 None 💨 8 mph

Sunday, Sep 20Sun Sep 20

Mostly sunny 82°/61° 💧 None 💨 9 mph

Monday, Sep 21Mon Sep 21

Mostly cloudy 83°/63° 💧 None 💨 8 mph

Tuesday, Sep 22Tue Sep 22

Mostly cloudy 80°/65° 💧 None 💨 9 mph

Wednesday, Sep 23Wed Sep 23

Overcast 72°/65° 💧 0.321 in 💨 7 mph

Thursday, Sep 24Thu Sep 24

Overcast 74°/65° 💧 0.005 in 💨 6 mph

Friday, Sep 25Fri Sep 25

Mostly sunny 80°/60° 💧 None 💨 8 mph

Saturday, Sep 26Sat Sep 26

Mostly cloudy 87°/60° 💧 None 💨 7 mph

Sunday, Sep 27Sun Sep 27

Mostly cloudy 90°/65° 💧 None 💨 8 mph

Monday, Sep 28Mon Sep 28

Mostly cloudy 88°/64° 💧 None 💨 8 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Walnut

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Walnut

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 8:00 AM

PM2.5 Fine particles Good 4,9µg/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 19,0µg/m³

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

O₃ Ozone Fair 81,8µg/m³

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

NO₂ Nitrogen dioxide Good 0,6µg/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 Walnut

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 8,9Very high 🙂Fair

Tomorrow UV 8,8Very high 🙂Fair

Wednesday UV 8,6Very high 🙂Fair

Thursday UV 7,0High 🙂Fair

Friday UV 8,0Very high 🙂Fair

Saturday UV 8,0Very high —Unavailable

Sunday UV 7,0High —Unavailable

Hourly UV index today

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

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.

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 Walnut

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · WALNUT, CALIFORNIA

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 12:00 AM–1:00 AM.

100/100Best-hour score

BEST TIME TONIGHT 12:00 AM–1:00 AM Astronomical darkness: 8:23 PM–5:10 AM

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

☾ Moonlight 13% Waxing Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 38° high at the best hour.

✦ Estimated visible meteors 1–3/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min64%

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

Explore current conditions and forecasts for other locations.

Forecast data for Walnut were last refreshed today at 7:29 AM. The current forecast period extends through 16/09/2026 at 5:00 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.