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Current weather in Jamestown is clear sky.

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

Now · 12:50 PM

Jamestown Weather & Hourly Forecast

United States · Colorado · 80455

70°F

Sunny

Feels like: 63°F

💧 Humidity 29% 🌡 Pressure 30.18 inHg 💨 Wind 8 mph 👁 Visibility 34.4 mi ☁ Clouds 8% ☀️ UV index 8.1 · Very high 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Jamestown

Today

1:00 PM

Sunny

70° 💧 None 💨 8 mph H 29%30.18 inHg

4:00 PM

Partly cloudy

71° 💧 None 💨 9 mph H 27%30.09 inHg

7:00 PM

Sunny

63° 💧 None 💨 1 mph H 42%30.12 inHg

10:00 PM

Clear night

55° 💧 None 💨 1 mph H 44%30.18 inHg

Tomorrow

1:00 AM

Clear night

46° 💧 None 💨 4 mph H 39%30.12 inHg

4:00 AM

Clear night

44° 💧 None 💨 5 mph H 42%30.09 inHg

7:00 AM

Sunny

43° 💧 None 💨 5 mph H 48%30.09 inHg

10:00 AM

Sunny

69° 💧 None 💨 3 mph H 19%30.06 inHg

1:00 PM

Sunny

76° 💧 None 💨 5 mph H 17%29.97 inHg

4:00 PM

Sunny

79° 💧 None 💨 6 mph H 12%29.85 inHg

7:00 PM

Sunny

67° 💧 None 💨 2 mph H 25%29.85 inHg

10:00 PM

Mostly clear night

57° 💧 None 💨 4 mph H 30%29.88 inHg

Friday

1:00 AM

Partly cloudy night

49° 💧 None 💨 5 mph H 38%29.85 inHg

4:00 AM

Mostly cloudy night

53° 💧 None 💨 8 mph H 23%29.83 inHg

7:00 AM

Mostly cloudy

50° 💧 None 💨 6 mph H 36%29.85 inHg

10:00 AM

Mostly cloudy

73° 💧 None 💨 2 mph H 15%29.83 inHg

Today

1:00 PM

Sunny

70° 💧 None 💨 8 mph H 29%30.18 inHg

2:00 PM

Sunny

71° 💧 None 💨 8 mph H 27%30.15 inHg

3:00 PM

Mostly sunny

72° 💧 None 💨 9 mph H 26%30.12 inHg

4:00 PM

Partly cloudy

71° 💧 None 💨 9 mph H 27%30.09 inHg

5:00 PM

Partly cloudy

70° 💧 None 💨 7 mph H 29%30.09 inHg

6:00 PM

Mostly sunny

68° 💧 None 💨 3 mph H 31%30.09 inHg

7:00 PM

Sunny

63° 💧 None 💨 1 mph H 42%30.12 inHg

8:00 PM

Clear night

59° 💧 None 💨 2 mph H 46%30.12 inHg

9:00 PM

Clear night

57° 💧 None 💨 2 mph H 46%30.15 inHg

10:00 PM

Clear night

55° 💧 None 💨 1 mph H 44%30.18 inHg

11:00 PM

Clear night

52° 💧 None 💨 2 mph H 42%30.18 inHg

Tomorrow

12:00 AM

Clear night

50° 💧 None 💨 4 mph H 39%30.15 inHg

1:00 AM

Clear night

46° 💧 None 💨 4 mph H 39%30.12 inHg

2:00 AM

Clear night

46° 💧 None 💨 4 mph H 39%30.12 inHg

3:00 AM

Clear night

45° 💧 None 💨 5 mph H 41%30.09 inHg

4:00 AM

Clear night

44° 💧 None 💨 5 mph H 42%30.09 inHg

5:00 AM

Clear night

44° 💧 None 💨 5 mph H 43%30.09 inHg

6:00 AM

Clear night

43° 💧 None 💨 5 mph H 46%30.09 inHg

7:00 AM

Sunny

43° 💧 None 💨 5 mph H 48%30.09 inHg

8:00 AM

Sunny

53° 💧 None 💨 4 mph H 44%30.09 inHg

9:00 AM

Sunny

67° 💧 None 💨 0 mph H 22%30.09 inHg

10:00 AM

Sunny

69° 💧 None 💨 3 mph H 19%30.06 inHg

11:00 AM

Sunny

72° 💧 None 💨 4 mph H 19%30.06 inHg

12:00 PM

Sunny

74° 💧 None 💨 5 mph H 19%30.03 inHg

1:00 PM

Sunny

76° 💧 None 💨 5 mph H 17%29.97 inHg

2:00 PM

Sunny

78° 💧 None 💨 6 mph H 14%29.91 inHg

3:00 PM

Sunny

79° 💧 None 💨 6 mph H 12%29.88 inHg

4:00 PM

Sunny

79° 💧 None 💨 6 mph H 12%29.85 inHg

5:00 PM

Sunny

77° 💧 None 💨 7 mph H 13%29.85 inHg

6:00 PM

Sunny

75° 💧 None 💨 6 mph H 15%29.85 inHg

7:00 PM

Sunny

67° 💧 None 💨 2 mph H 25%29.85 inHg

8:00 PM

Mostly clear night

61° 💧 None 💨 3 mph H 27%29.88 inHg

9:00 PM

Mostly clear night

59° 💧 None 💨 3 mph H 30%29.88 inHg

10:00 PM

Mostly clear night

57° 💧 None 💨 4 mph H 30%29.88 inHg

11:00 PM

Clear night

53° 💧 None 💨 3 mph H 35%29.88 inHg

Friday

12:00 AM

Partly cloudy night

50° 💧 None 💨 4 mph H 38%29.88 inHg

1:00 AM

Partly cloudy night

49° 💧 None 💨 5 mph H 38%29.85 inHg

2:00 AM

Mostly cloudy night

48° 💧 None 💨 7 mph H 37%29.85 inHg

3:00 AM

Mostly cloudy night

52° 💧 None 💨 9 mph H 26%29.83 inHg

4:00 AM

Mostly cloudy night

53° 💧 None 💨 8 mph H 23%29.83 inHg

5:00 AM

Mostly cloudy night

52° 💧 None 💨 7 mph H 26%29.83 inHg

6:00 AM

Mostly cloudy night

51° 💧 None 💨 7 mph H 30%29.83 inHg

7:00 AM

Mostly cloudy

50° 💧 None 💨 6 mph H 36%29.85 inHg

8:00 AM

Mostly cloudy

58° 💧 None 💨 6 mph H 34%29.85 inHg

9:00 AM

Mostly cloudy

69° 💧 None 💨 2 mph H 23%29.85 inHg

10:00 AM

Mostly cloudy

73° 💧 None 💨 2 mph H 15%29.83 inHg

11:00 AM

Mostly cloudy

75° 💧 None 💨 1 mph H 14%29.83 inHg

12:00 PM

Partly cloudy

78° 💧 None 💨 1 mph H 15%29.77 inHg

1:00 PM

Mostly sunny

81° 💧 None 💨 3 mph H 13%29.74 inHg

2:00 PM

Mostly sunny

82° 💧 None 💨 2 mph H 12%29.71 inHg

3:00 PM

Mostly sunny

82° 💧 0.001 in 💨 3 mph H 12%29.68 inHg

4:00 PM

Partly cloudy

82° 💧 None 💨 5 mph H 12%29.68 inHg

5:00 PM

Mostly sunny

80° 💧 0.001 in 💨 9 mph H 15%29.68 inHg

6:00 PM

Mostly sunny

79° 💧 0.000 in 💨 3 mph H 18%29.68 inHg

7:00 PM

Mostly cloudy

70° 💧 None 💨 7 mph H 19%29.74 inHg

8:00 PM

Mostly clear night

62° 💧 None 💨 7 mph H 32%29.77 inHg

9:00 PM

Partly cloudy night

56° 💧 0.000 in 💨 6 mph H 45%29.80 inHg

10:00 PM

Mostly clear night

54° 💧 None 💨 5 mph H 51%29.85 inHg

11:00 PM

Mostly clear night

54° 💧 0.001 in 💨 4 mph H 48%29.85 inHg

Saturday

12:00 AM

Clear night

55° 💧 None 💨 5 mph H 46%29.85 inHg

1:00 AM

Clear night

57° 💧 None 💨 2 mph H 38%29.88 inHg

2:00 AM

Clear night

57° 💧 None 💨 2 mph H 37%29.91 inHg

3:00 AM

Clear night

55° 💧 None 💨 5 mph H 41%29.91 inHg

4:00 AM

Clear night

54° 💧 None 💨 3 mph H 44%29.94 inHg

5:00 AM

Clear night

53° 💧 None 💨 4 mph H 45%29.94 inHg

6:00 AM

Clear night

54° 💧 None 💨 2 mph H 46%29.97 inHg

9:00 AM

Sunny

58° 💧 None 💨 2 mph H 39%30.06 inHg

12:00 PM

Mostly cloudy

65° 💧 None 💨 2 mph H 35%30.03 inHg

3:00 PM

Light rain

65° 💧 None 💨 3 mph H 39%29.94 inHg

6:00 PM

Partly cloudy

62° 💧 None 💨 7 mph H 49%29.94 inHg

9:00 PM

Clear night

51° 💧 None 💨 3 mph H 77%29.97 inHg

Sunday

12:00 AM

Clear night

52° 💧 None 💨 9 mph H 67%29.91 inHg

3:00 AM

Clear night

50° 💧 None 💨 8 mph H 71%29.83 inHg

6:00 AM

Mostly clear night

49° 💧 None 💨 7 mph H 70%29.83 inHg

9:00 AM

Mostly sunny

63° 💧 None 💨 7 mph H 48%29.83 inHg

12:00 PM

Mostly sunny

72° 💧 None 💨 13 mph H 29%29.74 inHg

3:00 PM

Partly cloudy

73° 💧 None 💨 11 mph H 27%29.71 inHg

6:00 PM

Mostly sunny

68° 💧 None 💨 8 mph H 34%29.71 inHg

9:00 PM

Clear night

55° 💧 None 💨 8 mph H 56%29.83 inHg

Monday

12:00 AM

Mostly clear night

52° 💧 None 💨 6 mph H 63%29.85 inHg

3:00 AM

Mostly clear night

47° 💧 None 💨 4 mph H 78%29.91 inHg

6:00 AM

Mostly clear night

46° 💧 None 💨 4 mph H 74%29.97 inHg

9:00 AM

Light rain

54° 💧 None 💨 3 mph H 61%30.03 inHg

12:00 PM

Light rain

61° 💧 None 💨 3 mph H 47%29.97 inHg

3:00 PM

Light rain

59° 💧 None 💨 5 mph H 52%29.97 inHg

6:00 PM

Light rain

54° 💧 None 💨 4 mph H 61%30.03 inHg

9:00 PM

Mostly clear night

46° 💧 None 💨 2 mph H 78%30.09 inHg

Tuesday

12:00 AM

Mostly clear night

46° 💧 None 💨 2 mph H 80%30.15 inHg

6:00 AM

Mostly clear night

45° 💧 None 💨 0 mph H 75%30.18 inHg

12:00 PM

Sunny

41° 💧 None 💨 1 mph H 88%30.18 inHg

6:00 PM

Light rain

61° 💧 None 💨 3 mph H 50%30.09 inHg

Wednesday

12:00 AM

Partly cloudy night

56° 💧 None 💨 4 mph H 79%30.09 inHg

6:00 AM

Clear night

47° 💧 None 💨 4 mph H 82%30.06 inHg

12:00 PM

Sunny

44° 💧 None 💨 7 mph H 79%30.03 inHg

6:00 PM

Mostly sunny

70° 💧 None 💨 7 mph H 29%30.03 inHg

Thursday

12:00 AM

Mostly clear night

66° 💧 None 💨 4 mph H 39%30.00 inHg

6:00 AM

Clear night

52° 💧 None 💨 7 mph H 54%30.03 inHg

12:00 PM

Partly cloudy

47° 💧 None 💨 7 mph H 67%30.09 inHg

6:00 PM

Partly cloudy

71° 💧 None 💨 3 mph H 25%30.09 inHg

Friday

12:00 AM

Partly cloudy night

65° 💧 None 💨 3 mph H 37%30.06 inHg

6:00 AM

Clear night

56° 💧 None 💨 1 mph H 47%30.12 inHg

12:00 PM

Mostly sunny

51° 💧 None 💨 2 mph H 57%30.09 inHg

6:00 PM

Light thunderstorms

63° 💧 None 💨 2 mph H 65%30.03 inHg

Saturday

12:00 AM

Partly cloudy night

57° 💧 None 💨 3 mph H 87%30.00 inHg

6:00 AM

Partly cloudy night

47° 💧 None 💨 7 mph H 88%29.91 inHg

12:00 PM

Mostly sunny

48° 💧 None 💨 9 mph H 82%29.94 inHg

6:00 PM

Light rain

60° 💧 None 💨 9 mph H 45%29.97 inHg

Sunday

12:00 AM

Mostly cloudy night

59° 💧 None 💨 4 mph H 35%29.91 inHg

6:00 AM

Clear night

43° 💧 None 💨 2 mph H 89%30.06 inHg

12:00 PM

Mostly sunny

42° 💧 None 💨 2 mph H 76%29.97 inHg

6:00 PM

Mostly sunny

57° 💧 None 💨 3 mph H 45%29.91 inHg

Monday

12:00 AM

Light rain

54° 💧 None 💨 7 mph H 52%29.88 inHg

6:00 AM

Mostly cloudy night

41° 💧 None 💨 7 mph H 94%29.97 inHg

12:00 PM

Partly cloudy

38° 💧 None 💨 8 mph H 94%29.94 inHg

6:00 PM

Mostly sunny

55° 💧 None 💨 12 mph H 45%29.94 inHg

Tuesday

12:00 AM

Mostly clear night

56° 💧 None 💨 4 mph H 40%29.91 inHg

6:00 AM

Mostly clear night

41° 💧 None 💨 4 mph H 70%30.00 inHg

12:00 PM

Sunny

41° 💧 None 💨 2 mph H 64%29.97 inHg

6:00 PM

Mostly sunny

52° 💧 None 💨 8 mph H 59%30.12 inHg

Wednesday

12:00 AM

Light rain

45° 💧 None 💨 6 mph H 94%30.21 inHg

6:00 AM

Light rain

43° 💧 None 💨 7 mph H 100%30.30 inHg

12:00 PM

Mostly cloudy

43° 💧 None 💨 0 mph H 98%30.24 inHg

6:00 PM

Overcast

55° 💧 None 💨 6 mph H 62%30.15 inHg

Thursday

12:00 AM

Light rain

47° 💧 None 💨 2 mph H 98%30.09 inHg

In Jamestown and, more broadly, across the state of Colorado: This afternoon will feature a mix of sun and clouds, with temperatures ranging from 59 to 69 degrees Fahrenheit. There is a possibility of light rain, with total accumulation around 0.03 inches, and the highest chance of rain occurring during the afternoon. Winds will be moderate, coming from the east at speeds up to 11 mph, with gusts reaching 13 mph. Overall, expect mild conditions with some variability in the sky and a slight chance of brief showers.

15-Day Weather Outlook for Jamestown

TomorrowTomorrow

Mostly sunny 79°/43° 💧 None 💨 7 mph

Friday, Sep 11Fri Sep 11

Mostly sunny 82°/48° 💧 None 💨 9 mph

Saturday, Sep 12Sat Sep 12

Light rain 79°/53° 💧 0.029 in 💨 7 mph

Sunday, Sep 13Sun Sep 13

Partly cloudy 73°/49° 💧 0.025 in 💨 13 mph

Monday, Sep 14Mon Sep 14

Light rain 68°/46° 💧 0.105 in 💨 8 mph

Tuesday, Sep 15Tue Sep 15

Light rain 54°/41° 💧 0.070 in 💨 4 mph

Wednesday, Sep 16Wed Sep 16

Light rain 61°/44° 💧 0.278 in 💨 7 mph

Thursday, Sep 17Thu Sep 17

Mostly sunny 70°/47° 💧 0.022 in 💨 7 mph

Friday, Sep 18Fri Sep 18

Partly cloudy 71°/51° 💧 0.009 in 💨 3 mph

Saturday, Sep 19Sat Sep 19

Light thunderstorms 63°/47° 💧 0.507 in 💨 9 mph

Sunday, Sep 20Sun Sep 20

Light rain 60°/42° 💧 0.038 in 💨 9 mph

Monday, Sep 21Mon Sep 21

Light rain 57°/38° 💧 0.133 in 💨 8 mph

Tuesday, Sep 22Tue Sep 22

Mostly sunny 56°/41° 💧 0.021 in 💨 12 mph

Wednesday, Sep 23Wed Sep 23

Light rain 52°/43° 💧 0.379 in 💨 8 mph

Thursday, Sep 24Thu Sep 24

Light rain 55°/47° 💧 0.219 in 💨 6 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Jamestown

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Jamestown

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 1:00 PM

PM2.5 Fine particles Good 0,7µg/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 1,2µg/m³

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

O₃ Ozone Fair 69,9µg/m³

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

NO₂ Nitrogen dioxide Good 0,2µg/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 Jamestown

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 8,8Very high 🙂Fair

Tomorrow UV 7,7High 🙂Fair

Friday UV 7,7High 🙂Fair

Saturday UV 7,8High 🙂Fair

Sunday UV 8,0Very high 🙂Fair

Monday UV 6,0High —Unavailable

Tuesday UV 7,0High —Unavailable

Hourly UV index today

1:00 PMUV 8,8 2:00 PMUV 8,0 3:00 PMUV 6,3 4:00 PMUV 4,0 5:00 PMUV 1,8 6:00 PMUV 0,6 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. 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 Jamestown

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · JAMESTOWN, COLORADO

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: 8:53 PM–5:05 AM

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

☾ Moonlight 2% New Moon · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 89° 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.

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Forecast data for Jamestown were last refreshed today at 12:49 PM. The current forecast period extends through 11/09/2026 at 10:00 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.