Today | Weather | Thursday, May 21, 2026

Weather in Nampa, Idaho

09:20 AM
Now
Cloudy Weather
59° F
Feels Like 57°
Precipitation 0 %
Wind 13 mph
UV Index (0 - 11+) 3
Humidity 47 %
Today
Cloudy Weather
Day 77°
Night 48°
Precipitation 0 %
Wind 12 mph
UV Index (0 - 11+) 10

Warning: High UV Index Today: 10

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Nampa Weather Forecast Updated

17 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (May 21, 2025)
Cloudy Weather

Day

70°

Night

50°

Wind

4 mph

UV Index

10

Precipitation

0 %

Air Quality in Nampa

NOW
36 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.79 µg/m³
PM10 1.42 µg/m³
O3 0.039 ppm
NO2 0.3 ppb
SO2 0 ppb
CO 0.09 ppm
NH3 4.12 µg/m³
NO 0.12 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)
PM2.50.79 µg/m³
PM101.42 µg/m³
O376.03 µg/m³
NO20.61 µg/m³
SO20.04 µg/m³
CO107.77 µg/m³
NH34.12 µg/m³
NO0.12 µg/m³