Today | Weather | Wednesday, March 18, 2026

Weather in Nampa, Idaho

02:36 PM
Now
Cloudy Weather
73° F
Feels Like 79°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 4
Humidity 26 %
Today
Cloudy Weather
Day 79°
Night 39°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 5

Nampa Weather Forecast Updated

56 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (March 18, 2025)
Partly Sunny with Showers

Day

50°

Night

25°

Wind

15 mph

UV Index

4

Precipitation

40 %

Air Quality in Nampa

NOW
41 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.64 µg/m³
PM10 1.14 µg/m³
O3 0.044 ppm
NO2 0.1 ppb
SO2 0 ppb
CO 0.07 ppm
NH3 0.89 µg/m³
NO 0.03 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

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

Show raw pollutant concentrations (µg/m³)
PM2.50.64 µg/m³
PM101.14 µg/m³
O385.98 µg/m³
NO20.13 µg/m³
SO20.01 µg/m³
CO84.92 µg/m³
NH30.89 µg/m³
NO0.03 µg/m³