Hourly Weather | Today Tuesday, September 1, 2026
Caldwell, Idaho
10 AM
Cloudy Weather
70°
Feels Like 72°
27
Humidity: 44%
UV Index: 4
Wind: 9 mph
11 AM
Cloudy Weather
72°
Feels Like 75°
14
Humidity: 42%
UV Index: 5
Wind: 8 mph
12 PM
Cloudy Weather
75°
Feels Like 79°
14
Humidity: 39%
UV Index: 6
Wind: 8 mph
1 PM
Cloudy Weather
77°
Feels Like 82°
13
Humidity: 35%
UV Index: 6
Wind: 7 mph
2 PM
Cloudy Weather
79°
Feels Like 84°
10
Humidity: 32%
UV Index: 6
Wind: 6 mph
3 PM
Cloudy Weather
79°
Feels Like 82°
10
Humidity: 30%
UV Index: 5
Wind: 6 mph
4 PM
Cloudy Weather
81°
Feels Like 82°
10
Humidity: 28%
UV Index: 4
Wind: 7 mph
5 PM
Cloudy Weather
82°
Feels Like 82°
10
Humidity: 27%
UV Index: 2
Wind: 7 mph
6 PM
Cloudy Weather
81°
Feels Like 81°
10
Humidity: 28%
UV Index: 1
Wind: 7 mph
7 PM
Cloudy Weather
79°
Feels Like 77°
7
Humidity: 31%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Weather
75°
Feels Like 73°
0
Humidity: 35%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Night
72°
Feels Like 70°
0
Humidity: 41%
UV Index: 0
Wind: 7 mph
10 PM
Cloudy Night
70°
Feels Like 66°
0
Humidity: 46%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Night
66°
Feels Like 64°
0
Humidity: 51%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

10 AM
42 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.98 µg/m³
  • PM10: 7.09 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.5 ppb
  • SO2: 0 ppb
  • CO: 0.08 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:

  • PM2.5: 8.06 µg/m³
  • PM10: 9.03 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.4 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

12 PM
49 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.65 µg/m³
  • PM10: 10.59 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.3 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

1 PM
60 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.4 µg/m³
  • PM10: 9.15 µg/m³
  • O3: 0.057 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

2 PM
57 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.74 µg/m³
  • PM10: 7.48 µg/m³
  • O3: 0.056 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

3 PM
56 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.28 µg/m³
  • PM10: 7.08 µg/m³
  • O3: 0.056 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

4 PM
59 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.42 µg/m³
  • PM10: 7.33 µg/m³
  • O3: 0.057 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

5 PM
60 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.83 µg/m³
  • PM10: 7.85 µg/m³
  • O3: 0.057 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

6 PM
61 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.57 µg/m³
  • PM10: 8.72 µg/m³
  • O3: 0.058 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

7 PM
65 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.51 µg/m³
  • PM10: 9.85 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

8 PM
67 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.42 µg/m³
  • PM10: 10.98 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

9 PM
70 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.99 µg/m³
  • PM10: 11.76 µg/m³
  • O3: 0.060 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

10 PM
69 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 10.02 µg/m³
  • PM10: 11.9 µg/m³
  • O3: 0.060 ppm
  • NO2: 0.3 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

11 PM
62 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.79 µg/m³
  • PM10: 11.71 µg/m³
  • O3: 0.058 ppm
  • NO2: 0.3 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.