Hourly Weather Forecast for Rochester, New Hampshire

Hourly Weather | Today › Friday, July 3, 2026

Active Weather Warnings

Extreme Heat Watch
Extreme Heat Warning

Rochester, New Hampshire

1 AM

81°

Feels Like 84°

Humidity: 72%

UV Index: 0

Wind: 6 mph

2 AM

81°

Feels Like 84°

Humidity: 72%

UV Index: 0

Wind: 4 mph

3 AM

77°

Feels Like 81°

Humidity: 77%

UV Index: 0

Wind: 6 mph

4 AM

75°

Feels Like 79°

Humidity: 82%

UV Index: 0

Wind: 6 mph

5 AM

73°

Feels Like 75°

Humidity: 90%

UV Index: 0

Wind: 6 mph

6 AM

75°

Feels Like 79°

Humidity: 85%

UV Index: 0

Wind: 6 mph

7 AM

79°

Feels Like 84°

Humidity: 80%

UV Index: 1

Wind: 7 mph

8 AM

81°

Feels Like 90°

Humidity: 77%

UV Index: 2

Wind: 7 mph

9 AM

84°

Feels Like 93°

Humidity: 69%

UV Index: 3

Wind: 8 mph

10 AM

88°

Feels Like 97°

Humidity: 62%

UV Index: 5

Wind: 8 mph

11 AM

90°

Feels Like 100°

Humidity: 56%

UV Index: 7

Wind: 9 mph

12 PM

93°

Feels Like 104°

Humidity: 50%

UV Index: 9

Wind: 9 mph

1 PM

93°

Feels Like 104°

Humidity: 47%

UV Index: 10

Wind: 9 mph

2 PM

95°

Feels Like 104°

Humidity: 43%

UV Index: 9

Wind: 9 mph

3 PM

93°

Feels Like 102°

Humidity: 45%

UV Index: 7

Wind: 9 mph

4 PM

93°

Feels Like 99°

Humidity: 47%

UV Index: 5

Wind: 9 mph

5 PM

90°

Feels Like 104°

Humidity: 68%

UV Index: 3

Wind: 9 mph

6 PM

88°

Feels Like 91°

Humidity: 56%

UV Index: 2

Wind: 8 mph

7 PM

86°

Feels Like 90°

Humidity: 62%

UV Index: 1

Wind: 7 mph

8 PM

82°

Feels Like 90°

Humidity: 73%

UV Index: 0

Wind: 6 mph

9 PM

81°

Feels Like 84°

Humidity: 75%

UV Index: 0

Wind: 6 mph

10 PM

77°

Feels Like 82°

Humidity: 80%

UV Index: 0

Wind: 4 mph

11 PM

81°

Feels Like 82°

Humidity: 69%

UV Index: 0

Wind: 4 mph

Hourly Air Quality Forecast - AQI (US EPA)

1 AM

41 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 9.79 µg/m³
PM₁₀: 11.5 µg/m³
O₃: 0.033 ppm
NO₂: 3.5 ppb
SO₂: 0.4 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

2 AM

38 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 9.19 µg/m³
PM₁₀: 10.72 µg/m³
O₃: 0.032 ppm
NO₂: 2.9 ppb
SO₂: 0.4 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

3 AM

35 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 8.4 µg/m³
PM₁₀: 9.71 µg/m³
O₃: 0.032 ppm
NO₂: 2.3 ppb
SO₂: 0.3 ppb
CO: 0.11 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

4 AM

33 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 7.93 µg/m³
PM₁₀: 9.07 µg/m³
O₃: 0.033 ppm
NO₂: 1.9 ppb
SO₂: 0.3 ppb
CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

5 AM

32 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 7.7 µg/m³
PM₁₀: 8.73 µg/m³
O₃: 0.033 ppm
NO₂: 1.7 ppb
SO₂: 0.3 ppb
CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

6 AM

31 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 7.54 µg/m³
PM₁₀: 8.47 µg/m³
O₃: 0.034 ppm
NO₂: 1.7 ppb
SO₂: 0.3 ppb
CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 AM

31 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 7.46 µg/m³
PM₁₀: 8.33 µg/m³
O₃: 0.034 ppm
NO₂: 2.2 ppb
SO₂: 0.3 ppb
CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 AM

32 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 7.38 µg/m³
PM₁₀: 8.18 µg/m³
O₃: 0.034 ppm
NO₂: 2.7 ppb
SO₂: 0.3 ppb
CO: 0.11 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 AM

37 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 6.95 µg/m³
PM₁₀: 7.57 µg/m³
O₃: 0.040 ppm
NO₂: 2 ppb
SO₂: 0.3 ppb
CO: 0.11 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 AM

41 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 6.8 µg/m³
PM₁₀: 7.32 µg/m³
O₃: 0.045 ppm
NO₂: 1.5 ppb
SO₂: 0.3 ppb
CO: 0.11 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 AM

46 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 7.01 µg/m³
PM₁₀: 7.46 µg/m³
O₃: 0.049 ppm
NO₂: 1.1 ppb
SO₂: 0.3 ppb
CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

12 PM

48 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 5.4 µg/m³
PM₁₀: 5.75 µg/m³
O₃: 0.051 ppm
NO₂: 0.7 ppb
SO₂: 0.2 ppb
CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

1 PM

47 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 3.85 µg/m³
PM₁₀: 4.1 µg/m³
O₃: 0.051 ppm
NO₂: 0.6 ppb
SO₂: 0.1 ppb
CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

2 PM

46 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 3.1 µg/m³
PM₁₀: 3.3 µg/m³
O₃: 0.050 ppm
NO₂: 0.6 ppb
SO₂: 0.1 ppb
CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

3 PM

46 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.66 µg/m³
PM₁₀: 2.81 µg/m³
O₃: 0.050 ppm
NO₂: 0.6 ppb
SO₂: 0.1 ppb
CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

4 PM

46 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.46 µg/m³
PM₁₀: 2.59 µg/m³
O₃: 0.049 ppm
NO₂: 0.7 ppb
SO₂: 0.1 ppb
CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

5 PM

46 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.41 µg/m³
PM₁₀: 2.53 µg/m³
O₃: 0.049 ppm
NO₂: 0.9 ppb
SO₂: 0.1 ppb
CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

6 PM

45 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.52 µg/m³
PM₁₀: 2.67 µg/m³
O₃: 0.049 ppm
NO₂: 1.6 ppb
SO₂: 0.1 ppb
CO: 0.11 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 PM

43 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.73 µg/m³
PM₁₀: 2.92 µg/m³
O₃: 0.047 ppm
NO₂: 2.5 ppb
SO₂: 0.2 ppb
CO: 0.11 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 PM

41 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.93 µg/m³
PM₁₀: 3.15 µg/m³
O₃: 0.044 ppm
NO₂: 3.1 ppb
SO₂: 0.2 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 PM

39 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 3.1 µg/m³
PM₁₀: 3.35 µg/m³
O₃: 0.042 ppm
NO₂: 3.3 ppb
SO₂: 0.3 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 PM

38 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 3.26 µg/m³
PM₁₀: 3.52 µg/m³
O₃: 0.041 ppm
NO₂: 3.1 ppb
SO₂: 0.3 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 PM

37 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 3.35 µg/m³
PM₁₀: 3.6 µg/m³
O₃: 0.040 ppm
NO₂: 2.8 ppb
SO₂: 0.3 ppb
CO: 0.11 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Rochester

Severe Future Likely

Extreme Heat Watch

Extreme Heat Watch issued June 30 at 6:35AM EDT until July 3 at 8:00PM EDT by NWS Gray ME

Jul 1, 12:00 PM → Jul 3, 8:00 PM

WHAT: Dangerously hot conditions with heat index values up to 110
possible.

WHERE: Portions of south central, southwest, and western Maine
and central, northern, and southern New Hampshire.

WHEN: From Wednesday afternoon through Friday evening.

IMPACTS: Heat related illnesses increase significantly during
extreme heat and high humidity events.

ADDITIONAL DETAILS: Overnight low temperatures will only fall
into the 70s, resulting in accumulated heat stress.

+ Read More

Updated: Jun 30, 1:24 PM Source: NWS Alert

Severe Expected Likely

Extreme Heat Warning

Extreme Heat Warning issued July 2 at 1:20PM EDT until July 3 at 8:00PM EDT by NWS Gray ME

Jul 2, 1:20 PM → Jul 3, 8:00 PM

WHAT: Dangerously hot conditions with heat index values up to 110.

WHERE: Portions of southwest and western Maine and central,
northern, and southern New Hampshire.

WHEN: Until 8 PM EDT Friday.

IMPACTS: Heat related illnesses increase significantly during
extreme heat and high humidity events.

ADDITIONAL DETAILS: Overnight low temperatures will only fall
into the 70s, resulting in accumulated heat stress.

+ Read More

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Updated: Jul 2, 7:04 PM Source: NWS Alert

Hourly Air Quality Forecast - AQI (US EPA)

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Weather Alerts and Warnings for Rochester

Extreme Heat Watch

Extreme Heat Warning

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