Now · 4:25 AM
Harrisburg Weather & Hourly Forecast
United States · Missouri · 65256
Hourly Forecast for Harrisburg
In Harrisburg and, more broadly, across the state of Missouri: This morning will start with mostly cloudy skies and mild temperatures around 67 degrees. Winds will be light from the northeast at up to 9 mph, with occasional gusts reaching 18 mph. As the day progresses, temperatures are expected to warm into the low 80s, reaching around 83. Rain may develop, with some areas experiencing about 0.08 inches of accumulation. The highest chance of rain is about 85%, so keep an umbrella handy if you're heading outdoors. Winds will remain light during the afternoon, continuing from the northeast at similar speeds. Overall, it looks like a warm, mostly cloudy day with a good likelihood of some rain, especially later in the day.
15-Day Weather Outlook for Harrisburg
TEMPERATURE OUTLOOK
Temperature & Weather Trends in Harrisburg
AIR QUALITY FORECAST
Air Quality Forecast for Harrisburg
PM2.5 Fine particles Good 7,1µg/m³
Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.
PM10 Particulate matter Good 7,6µg/m³
Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.
O₃ Ozone Good 39,9µg/m³
Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.
NO₂ Nitrogen dioxide Good 1,7µg/m³
A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.
Air quality is favorable for outdoor activities.
PM2.5 Fine particles Good 7,8µg/m³
Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.
PM10 Particulate matter Good 8,2µg/m³
Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.
O₃ Ozone Good 57,2µg/m³
Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.
NO₂ Nitrogen dioxide Good 2,2µg/m³
A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.
Air quality is favorable for outdoor activities.
PM2.5 Fine particles Fair 12,4µg/m³
Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.
PM10 Particulate matter Good 13,1µg/m³
Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.
O₃ Ozone Fair 74,9µg/m³
Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.
NO₂ Nitrogen dioxide Good 1,4µg/m³
A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.
Air quality is acceptable for most people.
PM2.5 Fine particles Fair 10,3µg/m³
Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.
PM10 Particulate matter Good 10,7µg/m³
Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.
O₃ Ozone Good 50,7µg/m³
Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.
NO₂ Nitrogen dioxide Good 1,7µg/m³
A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.
Air quality is acceptable for most people.
PM2.5 Fine particles Good 9,4µg/m³
Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.
PM10 Particulate matter Good 9,9µg/m³
Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.
O₃ Ozone Fair 70,7µg/m³
Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.
NO₂ Nitrogen dioxide Good 1,6µg/m³
A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.
Air quality is acceptable for most people.
UV & HEALTH
UV, Sun & Health Outlook in Harrisburg
Today's weather health advice
Open today's recommendations.
Low UV risk
UV radiation will be low, although basic protection is still advisable during prolonged exposure.
Good air quality
Air quality is good and outdoor activities can be enjoyed normally.
Comfortable temperature conditions
Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.
Good conditions for outdoor activities
Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.
WIND OUTLOOK
Hourly Wind Forecast for Harrisburg
Tonight's Stargazing & Shooting Stars
Good observing conditions. Best local viewing window: 5:00 AM–6:00 AM.
Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.
DISCOVER WEATHER NEARBY Weather in other cities
Explore current conditions and forecasts for other locations.
Forecast data for Harrisburg were last refreshed today at 4:25 AM. The current forecast period extends through 27/09/2026 at 2:00 AM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.