Dr. Noga Askenazi
Advanced Allergy & Asthma Associates S.C.
Crystal Lake, IL · Illinois
Crystal Lake, IL Pollen Count Today
View today's allergy index, primary allergen, weather context, tree, grass, and weed pollen levels, plus the 5-day pollen forecast for Crystal Lake.
Today's pollen count in Crystal Lake
Today in Crystal Lake, Illinois, the forecasted pollen level is moderate with an allergy index of 3. The primary allergen is Mugwort. Use the forecast below to see whether conditions are likely to rise, ease, or stay steady over the next few days.
AllergyAva shows forecasted pollen levels and allergy risk estimates for Crystal Lake. Actual exposure can vary by neighborhood, weather, and time outdoors.
Pollen Level
Moderate Risk3
Planning estimate (0–5)
Primary Allergen
Mugwort
Consider taking antihistamines before heading outside. Keep windows closed.
73°
Temp
98%
Humidity
7
Wind mph
Pollen: AllergyAva seasonal estimate · Weather: Includes data from Google Maps
5-Day Pollen Forecast
Best day this week
Wed - Very Low
Worst day this week
Tue - Very High
Today
82°/59°
3
Moderate
Tree2
Grass1
Weed3
Tomorrow
87°/63°
4
High
Tree0
Grass3
Weed4
Tue
91°/60°
5
Very High
Tree2
Grass0
Weed5
Wed
69°/50°
1
Very Low
Tree1
Grass1
Weed1
Thu
66°/50°
4
High
Tree1
Grass0
Weed4
None
Very Low
Low
Moderate
High
Very High
Allergen Breakdown
Mugwort
Moderate
Ragweed
Low
Oak
Low
Grass
Very Low
Ava Personal Risk
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Weather-allergy synergy
Why conditions feel this way today
Today in Crystal Lake, 98% humidity may keep irritation noticeable, especially if mugwort pollen overlaps with damp-weather mold sensitivity.
- Temp
- 73°F
- Humidity
- 98%
- Wind
- 7 mph
- Rain chance
- 18%
24-hour allergy risk curve
Best outdoor window today in Crystal Lake
Better
No clearly better outdoor window while alerts, storm risk, or strong wind are present.
Avoid
Storm periods, gust fronts, and exposed outdoor areas.
Extra caution
Stay indoors during storms, especially if pollen or asthma affects your breathing.
Data Confidence & Sources
Pollen Forecast
- Source
- AllergyAva seasonal planning estimate
- Last Daily Update
Pollen models recalculate once daily
Weather Conditions
- Source
- Includes data from Google Maps · Weather API
- Last Refresh
Weather data updates every 15–30 minutes
Local pollen exposure can vary by micro-vegetation, wind gusts, structural barriers, and time spent outdoors.
Check pollen in another city or ZIP code
Local allergy care
Allergists near Crystal Lake, IL
Use today's pollen forecast alongside nearby allergy and immunology profiles when symptoms need clinical follow-up, testing, or long-term treatment planning.
City allergy guide
Crystal Lake allergy profile
Today's risk+
Crystal Lake allergy conditions are shaped by local weather, seasonal vegetation, and short-term changes in wind, rain, humidity, and temperature. Tree pollen is usually more important in spring, grass pollen often builds from late spring into summer, and weed pollen can become more noticeable later in the year.
Use today's pollen index alongside the 5-day forecast to plan commutes, outdoor exercise, yard work, and window-open time in Crystal Lake. Conditions can still vary by neighborhood, nearby plants, and time spent outdoors.
Crystal Lake's guide sections below focus on recurring local exposure patterns. Today's moderate Mugwort reading is the live risk signal, while the seasonal and neighborhood notes explain where exposure can still differ during normal routines.
Seasonal guide+
Spring
Tree pollen
Often drives early-season symptoms
Late spring to summer
Grass pollen
Can rise around lawns, parks, and open areas
Late summer to fall
Ragweed/weed pollen
Major fall allergy trigger
Varies
Mold spores
Often affected by moisture and decaying leaves
Treatment and planning tips+
Track the forecast
Check Crystal Lake pollen levels daily during active allergy periods.
Reduce indoor exposure
Keep windows closed on high-pollen days and use HVAC or HEPA filtration when appropriate.
Plan medication timing
Follow your clinician's or product-label instructions, especially before your usual peak season.
Crystal Lake seasonal pollen calendar
Tree pollen
In season nowSpring
Often drives early-season symptoms
Grass pollen
In season nowLate spring to summer
Can rise around lawns, parks, and open areas
Ragweed/weed pollen
In season nowLate summer to fall
Major fall allergy trigger
Mold spores
Varies
Often affected by moisture and decaying leaves
Common pollen triggers around Crystal Lake
| Trigger | Typical season | What to know |
|---|---|---|
| Tree pollen | Spring | Often drives early-season symptoms |
| Grass pollen | Late spring to summer | Can rise around lawns, parks, and open areas |
| Ragweed/weed pollen | Late summer to fall | Major fall allergy trigger |
| Mold spores | Varies | Often affected by moisture and decaying leaves |
Frequently asked questions about pollen in Crystal Lake
What is the pollen count in Crystal Lake today?
Today in Crystal Lake, Illinois, the pollen level is moderate with an allergy index of 3. The main allergen to watch is Mugwort.
When is allergy season in Crystal Lake, Illinois?
Allergy season in Crystal Lake, Illinois can vary by allergen and weather conditions. Tree pollen often rises in spring, grass pollen becomes more active in late spring and summer, and weed pollen can remain elevated later in the year depending on local climate and vegetation.
How often should I check the pollen forecast in Crystal Lake?
If you have seasonal allergies in Crystal Lake, it is helpful to check the pollen forecast daily during peak allergy periods. Shifts in wind, rainfall, temperature, and humidity can all change local pollen exposure from one day to the next.
What pollen types affect people in Crystal Lake, Illinois?
Crystal Lake residents may be affected by tree pollen, grass pollen, and weed pollen during different parts of the year. The strongest trigger depends on the season, nearby vegetation, and current weather conditions.