Narvik Mold Forecast
Mold Today
Today (20 September) mold in Narvik is low; cladosporium and alternaria are low.
Mold Tomorrow
Tomorrow (21 September 2026) alternaria no longer expected, cladosporium remains low.
7-Day Trend
Over the next week alternaria and cladosporium will increase.
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Mold Risk
Today - 20 September
| Mold species | Level | Value |
|---|---|---|
| Alternaria | Low | 1/100 |
| Cladosporium | Low | 7/100 |
Tomorrow - 21 September
| Mold species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Alternaria | None | 0/100 | Steady |
| Cladosporium | Low | 4/100 | Steady |
Local Mold Conditions
Narvik averages 49.9% soil moisture in a cold climate. Even high moisture cannot sustain mold growth when temperatures fall below the threshold both species require. There is a workable, if unremarkable, supply of organic matter here. Both species are limited here — Cladosporium by moisture, Alternaria by moisture and temperature combined.
In Narvik, temperature overrides moisture as the primary control on mold — the brief warm season is the only viable window for growth. Soil moisture peaks at 64.6% in September and is lowest in May — outside the short warm season, cold temperatures suppress growth regardless of moisture levels. Airborne spore activity for both species peaks in the drier part of the warm window — dry-spored fungi rely on wind, not rain, to disperse.
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Frequently Asked Questions About Mold in Nordland
Why do I still have allergy symptoms after the pollen season?
Allergy symptoms after the main pollen season may be caused by mold spores. Outdoor mold levels can remain high into late summer and autumn, when pollen levels are already falling. Mold allergy can cause symptoms similar to pollen allergy, including sneezing, a runny or blocked nose, itchy eyes, coughing, and wheezing.
What are mold spores and why do they cause allergies?
Mold spores are tiny particles released by fungi into the air. When inhaled, they can trigger an allergic reaction in sensitive people. Common symptoms include sneezing, a runny or blocked nose, itchy or watery eyes, coughing, and wheezing.
When are mold spore levels highest?
Outdoor mold spore levels often increase during warm and humid conditions, particularly when there is plenty of decaying vegetation. Levels can vary considerably with weather, season, vegetation, and location, and some types of mold are more common during particular times of the year, e.g. in the Fall.
How can I reduce my exposure to mold spores?
If you are sensitive to mold, check local mold spore levels and forecasts before spending long periods outdoors. On high-risk days, reducing time around dense vegetation, compost, fallen leaves, and other sources of decaying plant material may help limit exposure.
Understanding the Scale
The 0–100 scores represent risk levels, not direct measurements of pollen or air pollutant concentrations. Higher scores indicate higher risk. Pollen and air quality use different thresholds.
Mold
| None | 0 | No or negligible risk of exposure. Pollen/mold exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen or mold spores may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen/mold exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen/mold exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen/mold exposure is expected to be at or near its highest levels. |
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