High Pollen in Riverside, CA

About pollen in Riverside

Weed pollen is the main story in Riverside today, running high enough to cause noticeable symptoms for anyone sensitive to it. Grass is present but only at a very low level, while tree pollen is absent entirely, so those with weed allergies are the ones most likely to feel it outdoors this afternoon. Looking ahead, this pattern should hold through the next several days, with weed pollen staying high most days and dipping only slightly at times, while grass remains steady at a low background level and trees stay quiet. This lines up with the season: late September is peak time for weeds like ragweed in the region, while familiar local trees such as olive, sycamore, and oak are well past their pollen-producing months and won't be a factor again until spring.

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 Riverside, CA today?

Riverside, 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 Riverside, 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 Riverside, 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.