High Pollen in Hesperia, CA
High today, mostly weed pollen.
Last updated September 29, 2026
Driving it today
Forecast
About pollen in Hesperia
Weed pollen is the main story in Hesperia today, running high enough to bother many sensitive residents, especially those who react to ragweed and other late-season desert weeds. Grass is present but only at a very low level, unlikely to cause much trouble, and tree pollen is essentially absent right now. Looking ahead, weed pollen should ease slightly over the next several days but is expected to remain in the moderate-to-high range, so allergy symptoms tied to weeds are likely to linger into early October. Grass should stay low and steady through the week, while trees remain quiet, which is typical for this time of year since species like juniper, oak, and cottonwood are dormant until late winter or spring. This pattern fits the season well, as early autumn in the high desert is usually dominated by weed pollen as summer growth dries out and releases its seeds.
What to do today
- Avoid mowing the lawn and raking leaves.
- When driving the car, close your windows and turn the air conditioning system to recirculation mode.
- Keep your windows closed and turn on your air purifier or air conditioning.
- Consider staying indoors during the peak pollen hours (morning and early afternoon).
Common questions
- What is the pollen count in Hesperia, CA today?
- Hesperia, CA is at a high 4 out of 5 on the Universal Pollen Index today, driven mainly by weed pollen. Over the next five days it ranges from 3 to 4 of 5.
- Is weed pollen high in Hesperia, CA right now?
- Weed pollen is high today at 4 of 5, and it's in season now. Many allergy sufferers will have symptoms.
- What plants are causing allergies in Hesperia, CA?
- The main sources right now are Grasses and Ragweed. Elm (Ulmaceae (the Elm family), Two distinct seasons, late winter to early spring, and late summer to fall (species dependent)) is actively pollinating.