Hourly Weather | Today Wednesday, March 18, 2026
Caldwell, Idaho
6 AM
Cloudy Night
37°
Feels Like 34°
0
Humidity: 86%
UV Index: 0
Wind: 6 mph
7 AM
Cloudy Night
36°
Feels Like 34°
0
Humidity: 87%
UV Index: 0
Wind: 6 mph
8 AM
Cloudy Weather
39°
Feels Like 37°
0
Humidity: 81%
UV Index: 1
Wind: 6 mph
9 AM
Cloudy Weather
41°
Feels Like 41°
0
Humidity: 77%
UV Index: 2
Wind: 6 mph
10 AM
Cloudy Weather
46°
Feels Like 48°
0
Humidity: 69%
UV Index: 3
Wind: 6 mph
11 AM
Cloudy Weather
54°
Feels Like 61°
0
Humidity: 53%
UV Index: 4
Wind: 6 mph
12 PM
Cloudy Weather
63°
Feels Like 72°
0
Humidity: 40%
UV Index: 4
Wind: 5 mph
1 PM
Cloudy Weather
68°
Feels Like 75°
0
Humidity: 33%
UV Index: 5
Wind: 5 mph
2 PM
Cloudy Weather
72°
Feels Like 79°
0
Humidity: 29%
UV Index: 4
Wind: 4 mph
3 PM
Cloudy Weather
73°
Feels Like 81°
0
Humidity: 27%
UV Index: 4
Wind: 4 mph
4 PM
Cloudy Weather
75°
Feels Like 79°
0
Humidity: 25%
UV Index: 3
Wind: 5 mph
5 PM
Cloudy Weather
79°
Feels Like 79°
0
Humidity: 23%
UV Index: 2
Wind: 6 mph
6 PM
Cloudy Weather
75°
Feels Like 75°
0
Humidity: 24%
UV Index: 1
Wind: 7 mph
7 PM
Cloudy Weather
75°
Feels Like 73°
0
Humidity: 26%
UV Index: 0
Wind: 7 mph
8 PM
Night
70°
Feels Like 66°
0
Humidity: 33%
UV Index: 0
Wind: 7 mph
9 PM
Night
64°
Feels Like 63°
0
Humidity: 38%
UV Index: 0
Wind: 7 mph
10 PM
Night
61°
Feels Like 59°
0
Humidity: 43%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Night
57°
Feels Like 55°
0
Humidity: 47%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

6 AM
24 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.63 µg/m³
  • PM10: 1.87 µg/m³
  • O3: 0.026 ppm
  • NO2: 0.5 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

7 AM
24 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.64 µg/m³
  • PM10: 1.93 µg/m³
  • O3: 0.026 ppm
  • NO2: 0.5 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

8 AM
23 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.66 µg/m³
  • PM10: 1.96 µg/m³
  • O3: 0.025 ppm
  • NO2: 0.6 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

9 AM
23 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.67 µg/m³
  • PM10: 1.98 µg/m³
  • O3: 0.025 ppm
  • NO2: 0.8 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.67 µg/m³
  • PM10: 1.96 µg/m³
  • O3: 0.024 ppm
  • NO2: 0.7 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

11 AM
23 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.67 µg/m³
  • PM10: 1.96 µg/m³
  • O3: 0.025 ppm
  • NO2: 0.6 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
25 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.69 µg/m³
  • PM10: 1.99 µg/m³
  • O3: 0.027 ppm
  • NO2: 0.5 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

1 PM
40 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 1.25 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

2 PM
41 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.88 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

3 PM
41 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.8 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

4 PM
42 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.78 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

5 PM
42 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.77 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

6 PM
42 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.8 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

7 PM
40 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.94 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

8 PM
37 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.54 µg/m³
  • PM10: 1.12 µg/m³
  • O3: 0.040 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.

9 PM
35 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.58 µg/m³
  • PM10: 1.24 µg/m³
  • O3: 0.037 ppm
  • NO2: 0.6 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

10 PM
32 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.58 µg/m³
  • PM10: 1.28 µg/m³
  • O3: 0.034 ppm
  • NO2: 0.6 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

11 PM
30 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.59 µg/m³
  • PM10: 1.33 µg/m³
  • O3: 0.032 ppm
  • NO2: 0.7 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

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