One Loudoun, VA Pollen Count Today

What is the One Loudoun pollen count today?

The One Loudoun pollen count today is 22 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Ragweed.

Short answer for anyone searching pollen count today One Loudoun: this page is updated every morning with the day’s modelled reading.

One Loudoun allergies today

One Loudoun allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 22 (Low), driven mainly by Ragweed. When people ask about One Loudoun allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for One Loudoun.

Allergies in One Loudoun follow the Virginia calendar set out below — the chapters, the plants behind them, and the 5-day forecast on this page show whether today is typical for the season or an exception to it. If you are checking allergies today in One Loudoun before heading outdoors, the split at the top of this page is the part to read: it shows which pollen is doing the work today, not just how high the total sits.

Read the five-day table on this page as the One Loudoun allergy forecast: today reads 22 (Low), and the day-by-day outlook shows whether One Loudoun allergies are set to ease or build across the week — the days to plan outdoor time around are the ones where the index steps down, not just today.

In practice, the allergy count One Loudoun today records is this same combined reading — tree, grass, weed and mold in one index.

The One Loudoun allergy count today is 22 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.

Pollen count today One Loudoun: the 5-day forecast

Pollen Atlas forecasts One Loudoun’s pollen count to peak on Saturday at 22 (Low) over the next 5 days.

Pollen by type in One Loudoun

• One Loudoun tree pollen count
• One Loudoun grass pollen count
• One Loudoun ragweed pollen count

What is driving One Loudoun’s pollen today

The shape of today’s 22 (Low) is set by weed pollen at 28 (Low on its own scale) — about 95% of the four category readings added together, 27 points clear of the next category, grass pollen at 1. A weed-led total is the classic late-year shape: tree and grass pollen have usually receded, leaving weed pollen — and on damp days mold — to make up most of what the index records. Weed pollen leading in November is the Virginia calendar working as expected — November falls in the closing weeks of the state’s weed chapter.

Plant-level detail is not in today’s feed for One Loudoun, so the drivers have to be read from the category split above. The Virginia guide’s account of Virginia names a spring tree crest and a fall ragweed season joined by a summer grass bridge — the pollens behind readings of this shape in this state — and the split shows how much of today’s total each category is actually carrying.

Across the five-day window the Total Pollen Index runs from 19 to 22, never changing band. Today’s 22 sits 1 point above the window’s average of 21.4 — a steady window, in which one day reads much like the next.

Plants affecting One Loudoun now

Detailed plant-by-plant readings for One Loudoun were not returned in today\u2019s source data, so this section summarises the pollen types the index above is built from instead of listing individual plants.

Tree pollen is one of the categories with a non-zero reading today, at 0.6 (Low).

Grass pollen is one of the categories with a non-zero reading today, at 1 (Low).

Weed pollen is one of the categories with a non-zero reading today, at 28 (Low).

In the Southeast pattern, the plants that typically shape this city’s year are spring trees, warm-season grasses and late-summer ragweed — named here as regional context only, not as today\u2019s measurements.

Plant detail returns here automatically on any day the source data includes it.

Every pollen type, with photos and seasons: the pollen directory.

One Loudoun pollen through the year

Chapter by chapter, the One Loudoun pollen year runs like this:

• Trees can start as early as February and peak in April.
• Grasses follow in May and run through the summer.
• Ragweed runs from mid-August to the first frost.
• Mold is the quiet fourth player, sustained by river-valley humidity between the pollen waves.

The Virginia allergy season guide names a spring tree crest and a fall ragweed season joined by a summer grass bridge. The mid-Atlantic spring crest moves inland and uphill: coastal readings crest first, Piedmont readings follow, and mountain readings trail by one to two weeks in most years. The AAFA has ranked Virginia’s capital region among the more challenging US metros in its annual Allergy Capitals assessments.

November in One Loudoun sits inside the weed chapter of the Virginia year, in its closing weeks — the part of the calendar today’s readings should be judged against. Between them, the three chapters cover 10 months of the Virginia year, February to November — a long season by national standards, with only a short quiet gap. The full calendar is set out in the Virginia allergy season guide.

How to read this index

Pollen Atlas reports the One Loudoun pollen count on a Total Pollen Index from 0 to 100, built from separate tree, grass and weed readings. The total is a summary, not an average of the three: a single strong category can lift it, and three quiet categories can hold it down even in a month when One Loudoun, VA pollen is usually more active. Index values are a modelled pollen risk index computed by Pollen Atlas from open weather, vegetation and phenology data, calibrated against CDC/NAB season data, with plant detail by the Google Pollen API. The index is a modelled 0–100 scale, not a measured count, and figures update through the day, so a morning and an evening visit to this page can legitimately show different numbers.

One Loudoun in today’s national picture

At 22 (Low), One Loudoun ranks joint 43357th of the 90896 cities Pollen Atlas tracks today — in the middle of the national table. The highest reading in the country today is Beja, Portugal at 52, and the lowest is Los Ángeles de San Rafael, Spain at 5. The whole table spans 47 points today — a wide-open day, when the top and bottom of the table are effectively in different seasons.

Around One Loudoun: University Center, VA (1 miles away) reads 22 (Low); Kincora, VA (1 miles away) reads 21 (Low); Ashburn, VA (2 miles away) reads 17 (Low). One Loudoun reads exactly level with its nearest tracked neighbour today. Across Virginia’s 687 tracked cities, today runs from 5 in Mechanicsburg to 29 in Manassas.

Pollen totals are population numbers; symptoms are personal. The same reading can leave one One Loudoun resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every ragweed season, allergists in One Loudoun, VA can test whether tree, grass, weed or mold is the category that matters for you — the four readings at the top of this page are the starting point for that conversation.

One Loudoun in its local area

One Loudoun sits 1 miles south-southwest of University Center, VA — the anchor of the forecast-point group this reading belongs to. Within the group of 2, One Loudoun ranks joint 1st; across Virginia’s 687 tracked cities, it ranks joint 94th today.

Like every Pollen Atlas city page, the One Loudoun, VA pollen count is refreshed each morning.

Nearby cities

• University Center pollen count (1 miles away)
• Kincora pollen count (1 miles away)
• Ashburn pollen count (2 miles away)
• Countryside pollen count (2 miles away)
• Belmont pollen count (3 miles away)
• Lansdowne pollen count (3 miles away)

From Pollen Atlas News

• Virginia allergy season
• Ragweed season