Helena, MT Air Quality
As of 1:54 AMAcceptable for most people; unusually sensitive people should take it easier outdoors.
Next 24 hours
US AQIAir quality outlook
Worst hour each day- Today65Moderate
- Fri 990Moderate
- Sat 1054Moderate
- Sun 1128Good
- Mon 1226Good
From our air-quality forecast models (GEOS-CF / GEFS aerosols). AQI uses the US EPA scale.
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Open full mapAbout Helena weather
Helena is in Lewis and Clark County, Montana, United States at 46.59°, -112.04°. Right now it’s 48° and mostly clear; today’s high is 75° with a 0% chance of rain.
Montana's climate is defined by its position as a gateway between the Pacific maritime influences from the west and the harsh continental climate of the northern Great Plains. The state holds the record for the largest 24-hour temperature change in U.S. history, when Loma experienced a 103-degree rise from minus 54 to 49 degrees Fahrenheit in January 1972. The Continental Divide runs through the western mountains, creating dramatically different weather on either side.
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