Iron Mountain Ranch · 3,600 ft · Tunk Valley, WA

Weather Station

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FROST RISK ACTIVE — —°F — Protect plants & water lines

Temperature

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°F

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Humidity

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Air Quality (AQI)

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Good

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Dew Point

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°F

Spread: —

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Temp Range — / —

Avg Humidity —

AQI Range — / —

Frost Readings —

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Temperature (°F)

AQI + PM2.5

Humidity (%)

Reading Guide

Temperature °F

Ambient air temp at 3,600 ft elevation. Readings can swing 40°F+ in a single day due to valley topography.

Below 32° — Frost / Freeze 32°–75° — Normal Range 76°–90° — Warm Above 90° — Hot

Relative Humidity %

Percentage of moisture in the air relative to saturation at current temperature. High humidity near dew point signals fog or precipitation risk.

Below 20% — Very Dry 30%–60% — Comfortable 60%–80% — Humid Above 80% — Very Humid / Fog Risk

Air Quality Index (AQI) EPA scale · based on PM2.5

Measures fine particulate matter (PM2.5) via PurpleAir sensor #182367 on-site. Wildfire smoke is the primary driver of poor readings in Tunk Valley.

0–50 — Good. Air quality satisfactory, no health concern. 51–100 — Moderate. Acceptable; sensitive groups may notice effects. 101–150 — Unhealthy for Sensitive Groups. Reduce prolonged outdoor exertion. 151–200 — Unhealthy. Everyone may begin to experience effects. 201–300 — Very Unhealthy. Health alert — limit outdoor activity. 301+ — Hazardous. Emergency conditions, avoid all outdoor exposure.

Dew Point °F

The temperature at which air becomes saturated and moisture condenses. "Spread" is the gap between current temp and dew point — a small spread means high fog or frost risk.

Below 32° — Frost likely when temp drops to dew point 32°–55° — Comfortable / dry 55°–65° — Muggy Above 65° — Oppressively humid (rare at this elevation)

PurpleAir Sensor #182367 · Iron Mountain Ranch · View on PurpleAir Map

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