Moderate Pollen in Rialto, CA

Moderate today, mostly grass pollen.

Last updated July 1, 2026

Today's index3out of 5Moderate
GrassModerateoff-season

What to do today

  • It's important to shower and wash your hair after spending a lot of time outdoors.
  • When spending time outside, use sunglasses and a cap to keep pollen out of your face and eyes.
  • Wash clothes worn outdoors to remove any remnants of pollen grains.
  • If possible, wear glasses instead of contact lenses.
  • Did you hang any laundry outside? Now is a good time to hang clothes indoors or use a dryer if possible.

Forecast

Thu
3
Fri
3
Sat
2
Sun
2

About pollen in Rialto

Grass pollen is the main driver in Rialto today, sitting at a moderate level (3 on the 0–5 scale) and pushing the overall index to moderate as well. Expect this to hold steady over the next several days, with grass staying at moderate before easing slightly toward the end of the five-day window. The timing fits the season, as grasses typically peak in late spring and early summer. Tree pollen, which tends to dominate earlier in spring, isn't being reported here, and ragweed and other weeds generally don't ramp up until later in the summer and fall.

Common questions

What is the pollen count in Rialto, CA today?
Rialto, CA is at a moderate 3 out of 5 on the Universal Pollen Index today, driven mainly by grass pollen. Over the next five days it ranges from 2 to 3 of 5.
Is grass pollen high in Rialto, CA right now?
Grass pollen is moderate today at 3 of 5, and it's past its peak season. Sensitive people may notice symptoms.