Sioux City pollen forecast - today, tomorrow and the week ahead
Today (9 August) pollen in Sioux City is medium; grass, mugwort, and ragweed are medium. Tomorrow (10 August 2026) levels are similar - ragweed remains medium, grass declining, mugwort declining. Over the following five days grass and ragweed will increase; mugwort will decrease. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.
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Sioux City's parks, including Stone State Park and the Missouri River corridor, feature oak, elm, and cottonwood as the main tree pollen sources, with exposure varying between these green areas and the more built-up city centre. Surrounding Iowa, Nebraska, and South Dakota farmland and prairie contribute substantial grass and crop pollen, while the Missouri River valley channels airflows and concentrates pollen across the city.
Today - 9 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Medium
35/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Medium
38/100
-
Ragweed (Ambrosia):
Medium
48/100
High pollen levels may trigger sneezing, itchy eyes, and congestion. Airmine's neighbourhood estimates use satellites to map local vegetation and a statistical prediction model, updated four times daily.
Tomorrow - 10 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Low
13/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Low
16/100
-
Ragweed (Ambrosia):
Medium
27/100
Air quality in Sioux City
View air qualityPollen forecast for neighborhoods and landmarks in Sioux City
Frequently Asked Questions
Is pollen high in Sioux City right now?
On 9 August 2026, overall pollen levels in Sioux City are moderate. Ambrosia is the main contributor to airborne pollen, while artemisia and grass remain at lower levels
Will pollen levels change in Sioux City tomorrow?
On 10 August 2026, pollen conditions in Sioux City will be different from today, with ambrosia at medium levels and artemisia, grass continuing to decline
Is pollen expected to decrease in Sioux City this week?
According to the five-day outlook, artemisia pollen levels are expected to gradually decrease, while ambrosia and grass pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Sioux City?
On 9 August 2026, Ambrosia is the dominant pollen source in Sioux City. artemisia and grass are also present but at lower levels. cypress are not currently active.
When is pollen season in Sioux City?
How often is the Sioux City pollen forecast updated?
The Sioux City pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Sioux City come from nearby or far away?
Studies show that most pollen exposure (often 70–90%) comes from nearby sources, such as local trees and vegetation. A good pollen forecast therefore depends on accurately representing local vegetation. Pollen can travel long distances, but this usually matters only early in the season or during specific wind events.
Are pollen levels in Sioux City based on measurements or forecasts?
Pollen data is often misunderstood. Most "pollen levels" are not real-time measurements, but forecasts.
Direct pollen measurements are typically delayed by 1-2 days because they require manual analysis. To show current conditions in Sioux City, modern forecasts combine recent measurements, weather data, and information about local vegetation.
This allows us to estimate pollen levels for today and the coming days, not just report the past.
Airmine’s atmospheric monitoring platform was developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team, using satellite and Earth observation technologies to improve emissions monitoring.
Want to see pollen forecasts for other cities in United States?
Check pollen in other popular cities:
Data provided by Airmine — Last update: 10 August 2026 at 02:34 CEST (Data is updated four times daily.)
This page provides the latest public pollen forecast for Sioux City.
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Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.