New Castle pollen forecast - today, tomorrow and the week ahead

Today (9 August) pollen in New Castle is medium; ragweed is medium. Tomorrow (10 August 2026) levels are similar - ragweed remains medium, grass at low levels, mugwort at low levels. Over the following five days grass, mugwort, and ragweed will decrease. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.

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New Castle sits on flat farmland in east-central Indiana, where the dominant vegetation is a mix of corn and soybean fields, oak woodlots, and riverside cottonwood, shaping the local pollen profile across the seasons. None of this is unusual for a town with New Castle's particular mix of terrain and plant life. None of this differs sharply from one year to the next barring unusual weather.

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):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    Medium

    28/100

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

    17/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    Low

    15/100

  • Ragweed (Ambrosia):

    Medium

    50/100

Air quality in New Castle

View air quality

Pollen forecast for neighborhoods and landmarks in New Castle

Downtown New Castle

Frequently Asked Questions

Is pollen high in New Castle right now?

On 9 August 2026, overall pollen levels in New Castle are moderate. Ambrosia is the main contributor to airborne pollen

Will pollen levels change in New Castle tomorrow?

On 10 August 2026, pollen conditions in New Castle will be different from today, with ambrosia at medium levels, artemisia at low levels, grass at low levels

Is pollen expected to decrease in New Castle this week?

According to the five-day outlook, ambrosia, artemisia, and grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.

Which pollen types are currently active in New Castle?

On 9 August 2026, Ambrosia is the dominant pollen source in New Castle. artemisia, cypress, and grass are not currently active.

When is pollen season in New Castle?
In New Castle, pollen season begins with maple and elm starting in March then oak builds through April. Peak grass pollen arrives in May and June, and ragweed extends the season into September. A humid continental climate drives a sharp spring tree peak and an equally distinct late-summer ragweed run.
How often is the New Castle pollen forecast updated?

The New Castle pollen forecast is updated four times daily. See the timestamp below for the most recent update.

Does pollen in New Castle 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 New Castle 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 New Castle, 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?

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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 New Castle.

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Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.

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.