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Current weather in Hamilton is broken clouds.

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

Now · 9:57 PM

Hamilton Weather & Hourly Forecast

United States · Washington · 98255

49°F

Mostly cloudy night

Feels like: 48°F

💧 Humidity 82% 🌡 Pressure 30.09 inHg 💨 Wind 1 mph 👁 Visibility 23.5 mi ☁ Clouds 91% ☀️ UV index 0.0 · Low 🌅 Sunrise 6:53 AM 🌇 Sunset 7:07 PM

Hourly Forecast for Hamilton

Today

10:00 PM

Mostly cloudy night

49° 💧 None 💨 1 mph H 82%30.09 inHg

Tomorrow

1:00 AM

Overcast night

49° 💧 None 💨 1 mph H 86%30.09 inHg

4:00 AM

Partly cloudy night

47° 💧 None 💨 1 mph H 90%30.09 inHg

7:00 AM

Mostly cloudy

44° 💧 None 💨 2 mph H 95%30.09 inHg

10:00 AM

Overcast

54° 💧 None 💨 2 mph H 77%30.12 inHg

1:00 PM

Overcast

60° 💧 0.011 in 💨 3 mph H 57%30.09 inHg

4:00 PM

Light rain

58° 💧 0.022 in 💨 3 mph H 71%30.12 inHg

7:00 PM

Mostly cloudy

50° 💧 0.001 in 💨 1 mph H 96%30.12 inHg

10:00 PM

Fog at night

48° 💧 None 💨 0 mph H 99%30.12 inHg

Thursday

1:00 AM

Fog at night

46° 💧 None 💨 3 mph H 99%30.09 inHg

4:00 AM

Overcast night

46° 💧 None 💨 3 mph H 99%30.06 inHg

7:00 AM

Fog

46° 💧 0.001 in 💨 3 mph H 98%30.00 inHg

10:00 AM

Fog

51° 💧 None 💨 3 mph H 89%29.94 inHg

1:00 PM

Overcast

55° 💧 None 💨 1 mph H 79%29.88 inHg

4:00 PM

Overcast

55° 💧 0.008 in 💨 2 mph H 87%29.83 inHg

7:00 PM

Light rain

52° 💧 0.068 in 💨 2 mph H 95%29.80 inHg

Today

10:00 PM

Mostly cloudy night

49° 💧 None 💨 1 mph H 82%30.09 inHg

11:00 PM

Overcast night

50° 💧 None 💨 1 mph H 83%30.09 inHg

Tomorrow

12:00 AM

Overcast night

50° 💧 None 💨 1 mph H 84%30.09 inHg

1:00 AM

Overcast night

49° 💧 None 💨 1 mph H 86%30.09 inHg

2:00 AM

Mostly cloudy night

49° 💧 None 💨 1 mph H 88%30.09 inHg

3:00 AM

Mostly cloudy night

48° 💧 None 💨 2 mph H 89%30.09 inHg

4:00 AM

Partly cloudy night

47° 💧 None 💨 1 mph H 90%30.09 inHg

5:00 AM

Partly cloudy night

46° 💧 None 💨 2 mph H 93%30.09 inHg

6:00 AM

Partly cloudy night

45° 💧 None 💨 2 mph H 95%30.09 inHg

7:00 AM

Mostly cloudy

44° 💧 None 💨 2 mph H 95%30.09 inHg

8:00 AM

Mostly cloudy

47° 💧 None 💨 3 mph H 94%30.12 inHg

9:00 AM

Overcast

52° 💧 None 💨 2 mph H 83%30.12 inHg

10:00 AM

Overcast

54° 💧 None 💨 2 mph H 77%30.12 inHg

11:00 AM

Overcast

55° 💧 None 💨 1 mph H 68%30.12 inHg

12:00 PM

Overcast

57° 💧 None 💨 1 mph H 59%30.12 inHg

1:00 PM

Overcast

60° 💧 None 💨 3 mph H 57%30.09 inHg

2:00 PM

Overcast

60° 💧 None 💨 4 mph H 60%30.12 inHg

3:00 PM

Light rain

58° 💧 0.011 in 💨 3 mph H 69%30.12 inHg

4:00 PM

Light rain

58° 💧 0.011 in 💨 3 mph H 71%30.12 inHg

5:00 PM

Light rain

56° 💧 0.008 in 💨 3 mph H 80%30.09 inHg

6:00 PM

Mostly cloudy

54° 💧 0.002 in 💨 3 mph H 87%30.12 inHg

7:00 PM

Mostly cloudy

50° 💧 0.001 in 💨 1 mph H 96%30.12 inHg

8:00 PM

Mostly cloudy night

49° 💧 None 💨 1 mph H 99%30.12 inHg

9:00 PM

Fog at night

48° 💧 None 💨 0 mph H 100%30.12 inHg

10:00 PM

Fog at night

48° 💧 None 💨 0 mph H 99%30.12 inHg

11:00 PM

Fog at night

47° 💧 None 💨 1 mph H 98%30.12 inHg

Thursday

12:00 AM

Fog at night

47° 💧 None 💨 2 mph H 98%30.12 inHg

1:00 AM

Fog at night

46° 💧 None 💨 3 mph H 99%30.09 inHg

2:00 AM

Fog at night

45° 💧 None 💨 3 mph H 99%30.09 inHg

3:00 AM

Fog at night

45° 💧 None 💨 3 mph H 99%30.06 inHg

4:00 AM

Overcast night

46° 💧 None 💨 3 mph H 99%30.06 inHg

5:00 AM

Overcast night

46° 💧 None 💨 3 mph H 99%30.03 inHg

6:00 AM

Fog at night

46° 💧 None 💨 3 mph H 99%30.03 inHg

7:00 AM

Fog

46° 💧 0.001 in 💨 3 mph H 98%30.00 inHg

8:00 AM

Fog

47° 💧 None 💨 4 mph H 97%30.00 inHg

9:00 AM

Fog

48° 💧 None 💨 3 mph H 94%29.97 inHg

10:00 AM

Fog

51° 💧 None 💨 3 mph H 89%29.94 inHg

11:00 AM

Overcast

54° 💧 None 💨 2 mph H 81%29.94 inHg

12:00 PM

Overcast

56° 💧 None 💨 1 mph H 74%29.91 inHg

1:00 PM

Overcast

55° 💧 None 💨 1 mph H 79%29.88 inHg

2:00 PM

Overcast

56° 💧 None 💨 1 mph H 80%29.85 inHg

3:00 PM

Overcast

56° 💧 None 💨 3 mph H 82%29.85 inHg

4:00 PM

Overcast

55° 💧 None 💨 2 mph H 87%29.83 inHg

5:00 PM

Overcast

54° 💧 None 💨 3 mph H 89%29.83 inHg

6:00 PM

Light rain

53° 💧 0.008 in 💨 1 mph H 93%29.83 inHg

7:00 PM

Light rain

52° 💧 0.013 in 💨 2 mph H 95%29.80 inHg

8:00 PM

Light rain

52° 💧 0.020 in 💨 1 mph H 93%29.83 inHg

9:00 PM

Light rain

52° 💧 0.034 in 💨 2 mph H 94%29.83 inHg

10:00 PM

Light rain

51° 💧 0.034 in 💨 3 mph H 94%29.80 inHg

11:00 PM

Light rain

52° 💧 0.021 in 💨 1 mph H 93%29.80 inHg

Friday

12:00 AM

Light rain

51° 💧 0.024 in 💨 2 mph H 93%29.80 inHg

1:00 AM

Light rain

51° 💧 0.022 in 💨 1 mph H 93%29.80 inHg

2:00 AM

Light rain

51° 💧 0.008 in 💨 1 mph H 93%29.80 inHg

3:00 AM

Light rain

50° 💧 0.025 in 💨 1 mph H 93%29.77 inHg

4:00 AM

Light rain

50° 💧 0.043 in 💨 1 mph H 93%29.77 inHg

5:00 AM

Light rain

50° 💧 0.025 in 💨 1 mph H 93%29.77 inHg

2:00 PM

Light rain

47° 💧 None 💨 4 mph H 99%29.91 inHg

5:00 PM

Light rain

48° 💧 None 💨 3 mph H 97%30.00 inHg

8:00 PM

Moderate rain

47° 💧 None 💨 3 mph H 98%30.06 inHg

11:00 PM

Moderate rain

46° 💧 None 💨 5 mph H 99%30.12 inHg

Saturday

2:00 AM

Light rain

46° 💧 None 💨 3 mph H 98%30.15 inHg

5:00 AM

Light rain

45° 💧 None 💨 2 mph H 99%30.21 inHg

8:00 AM

Overcast

45° 💧 None 💨 2 mph H 99%30.24 inHg

11:00 AM

Mostly cloudy

48° 💧 None 💨 1 mph H 90%30.24 inHg

2:00 PM

Mostly cloudy

53° 💧 None 💨 1 mph H 67%30.21 inHg

5:00 PM

Mostly cloudy

53° 💧 None 💨 1 mph H 62%30.15 inHg

8:00 PM

Overcast night

47° 💧 None 💨 1 mph H 80%30.15 inHg

11:00 PM

Mostly cloudy night

44° 💧 None 💨 0 mph H 86%30.12 inHg

Sunday

2:00 AM

Partly cloudy night

40° 💧 None 💨 2 mph H 91%30.12 inHg

5:00 AM

Partly cloudy night

39° 💧 None 💨 2 mph H 91%30.12 inHg

8:00 AM

Overcast

41° 💧 None 💨 3 mph H 94%30.15 inHg

11:00 AM

Overcast

53° 💧 None 💨 1 mph H 70%30.12 inHg

2:00 PM

Mostly sunny

58° 💧 None 💨 4 mph H 57%30.09 inHg

5:00 PM

Mostly sunny

56° 💧 None 💨 3 mph H 62%30.09 inHg

8:00 PM

Clear night

47° 💧 None 💨 1 mph H 87%30.12 inHg

11:00 PM

Partly cloudy night

42° 💧 None 💨 1 mph H 90%30.12 inHg

Monday

2:00 AM

Mostly cloudy night

40° 💧 None 💨 2 mph H 85%30.12 inHg

5:00 AM

Overcast night

40° 💧 None 💨 3 mph H 83%30.12 inHg

8:00 AM

Partly cloudy

43° 💧 None 💨 4 mph H 83%30.12 inHg

11:00 AM

Partly cloudy

55° 💧 None 💨 2 mph H 61%30.09 inHg

5:00 PM

Mostly cloudy

54° 💧 None 💨 1 mph H 70%30.00 inHg

11:00 PM

Overcast night

55° 💧 None 💨 3 mph H 81%29.94 inHg

Tuesday

5:00 AM

Overcast night

48° 💧 None 💨 1 mph H 88%29.85 inHg

11:00 AM

Overcast

48° 💧 None 💨 3 mph H 80%29.83 inHg

5:00 PM

Moderate rain

54° 💧 None 💨 5 mph H 77%29.80 inHg

11:00 PM

Moderate rain

50° 💧 None 💨 2 mph H 97%29.77 inHg

Wednesday

5:00 AM

Light rain

47° 💧 None 💨 1 mph H 92%29.80 inHg

11:00 AM

Light rain

45° 💧 None 💨 4 mph H 98%29.91 inHg

5:00 PM

Moderate rain

46° 💧 None 💨 3 mph H 97%30.03 inHg

11:00 PM

Light rain

50° 💧 None 💨 4 mph H 73%30.09 inHg

Thursday

5:00 AM

Mostly cloudy night

43° 💧 None 💨 1 mph H 92%30.21 inHg

11:00 AM

Partly cloudy

42° 💧 None 💨 2 mph H 96%30.30 inHg

5:00 PM

Mostly sunny

50° 💧 None 💨 3 mph H 77%30.30 inHg

11:00 PM

Mostly cloudy night

56° 💧 None 💨 2 mph H 65%30.21 inHg

Friday

5:00 AM

Clear night

44° 💧 None 💨 2 mph H 80%30.18 inHg

11:00 AM

Overcast

42° 💧 None 💨 4 mph H 84%30.15 inHg

5:00 PM

Mostly sunny

57° 💧 None 💨 4 mph H 54%30.15 inHg

11:00 PM

Overcast night

62° 💧 None 💨 2 mph H 65%30.03 inHg

Saturday

5:00 AM

Mostly cloudy night

48° 💧 None 💨 1 mph H 80%30.03 inHg

11:00 AM

Partly cloudy

43° 💧 None 💨 1 mph H 84%30.03 inHg

5:00 PM

Mostly cloudy

51° 💧 None 💨 3 mph H 83%30.12 inHg

11:00 PM

Clear night

53° 💧 None 💨 4 mph H 62%30.09 inHg

Sunday

5:00 AM

Clear night

41° 💧 None 💨 1 mph H 87%30.12 inHg

11:00 AM

Partly cloudy

36° 💧 None 💨 3 mph H 91%30.12 inHg

5:00 PM

Sunny

51° 💧 None 💨 1 mph H 66%30.09 inHg

11:00 PM

Mostly clear night

53° 💧 None 💨 5 mph H 72%30.03 inHg

Monday

5:00 AM

Overcast night

39° 💧 None 💨 1 mph H 100%30.09 inHg

11:00 AM

Mostly cloudy

37° 💧 None 💨 3 mph H 99%30.12 inHg

5:00 PM

Sunny

53° 💧 None 💨 1 mph H 65%30.15 inHg

11:00 PM

Clear night

57° 💧 None 💨 4 mph H 66%30.12 inHg

Tuesday

5:00 AM

Clear night

43° 💧 None 💨 1 mph H 90%30.18 inHg

11:00 AM

Mostly sunny

38° 💧 None 💨 3 mph H 84%30.21 inHg

5:00 PM

Sunny

55° 💧 None 💨 3 mph H 54%30.24 inHg

11:00 PM

Clear night

58° 💧 None 💨 3 mph H 63%30.18 inHg

Wednesday

5:00 AM

Clear night

43° 💧 None 💨 2 mph H 87%30.18 inHg

11:00 AM

Partly cloudy

39° 💧 None 💨 3 mph H 88%30.21 inHg

In Hamilton and, more broadly, across the state of Washington: Clear skies will persist into the evening, with temperatures remaining mild between 58 and 67 degrees Fahrenheit. Light eastward winds are expected, averaging around 2 mph, with occasional gusts reaching up to 9 mph. No precipitation is anticipated during the next few hours, providing a calm and dry evening. Temperatures will gradually cool as the night progresses, but conditions should remain comfortable and clear through the late evening and into the early morning hours.

15-Day Weather Outlook for Hamilton

TomorrowTomorrow

Overcast 60°/44° 💧 None 💨 4 mph

Thursday, Sep 24Thu Sep 24

Overcast 56°/45° 💧 None 💨 4 mph

Friday, Sep 25Fri Sep 25

Moderate rain 51°/46° 💧 1.039 in 💨 5 mph

Saturday, Sep 26Sat Sep 26

Light rain 53°/44° 💧 0.168 in 💨 3 mph

Sunday, Sep 27Sun Sep 27

Partly cloudy 58°/39° 💧 0.001 in 💨 4 mph

Monday, Sep 28Mon Sep 28

Overcast 55°/40° 💧 0.415 in 💨 4 mph

Tuesday, Sep 29Tue Sep 29

Moderate rain 54°/48° 💧 0.548 in 💨 5 mph

Wednesday, Sep 30Wed Sep 30

Moderate rain 50°/45° 💧 1.260 in 💨 4 mph

Thursday, Oct 1Thu Oct 1

Mostly cloudy 56°/42° 💧 0.029 in 💨 3 mph

Friday, Oct 2Fri Oct 2

Overcast 62°/42° 💧 None 💨 4 mph

Saturday, Oct 3Sat Oct 3

Mostly cloudy 53°/43° 💧 0.008 in 💨 4 mph

Sunday, Oct 4Sun Oct 4

Partly cloudy 53°/36° 💧 None 💨 5 mph

Monday, Oct 5Mon Oct 5

Mostly cloudy 57°/37° 💧 0.002 in 💨 4 mph

Tuesday, Oct 6Tue Oct 6

Mostly sunny 58°/38° 💧 None 💨 3 mph

Wednesday, Oct 7Wed Oct 7

Partly cloudy 43°/39° 💧 None 💨 3 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Hamilton

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Hamilton

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 10:00 PM

PM2.5 Fine particles Good 2,5µg/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 4,6µg/m³

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

O₃ Ozone Good 42,5µg/m³

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

NO₂ Nitrogen dioxide Good 9,9µg/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 Hamilton

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 3,8Moderate 😊Good

Tomorrow UV 3,6Moderate 🙂Fair

Thursday UV 2,5Low 😊Good

Friday UV 2,0Low 🙂Fair

Saturday UV 3,5Moderate 🙂Fair

Sunday UV 4,0Moderate —Unavailable

Monday UV 3,0Moderate —Unavailable

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 Hamilton

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · HAMILTON, WASHINGTON

Tonight's Stargazing & Shooting Stars

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

64/100Best-hour score

BEST TIME TONIGHT 5:00 AM–6:00 AM Astronomical darkness: 8:52 PM–5:10 AM

☁ Cloud cover 45% 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 56° 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 min54%

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

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Forecast data for Hamilton were last refreshed today at 9:57 PM. The current forecast period extends through 24/09/2026 at 7:00 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.