Very Low Pollen in Rialto, CA
Very low today, mostly grass pollen.
Last updated July 20, 2026
Today's indexVery Low
GrassVery Lowoff-season
What to do today
- Pollen levels are very low right now. It's a great day to enjoy the outdoors!
Forecast
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About pollen in Rialto
Pollen levels in Rialto are quiet today, with grass registering as the only active source and sitting at a very low level. Most people, even those with sensitivities, should notice little to no irritation outdoors right now. Looking ahead, the next several days show grass holding steady at that same low level, so no significant change is expected through the week. This lull fits the season, as the region's typical tree pollens from oaks, sycamores, and olives peaked back in spring, and grass has largely wound down from its late-spring high point. With ragweed and other late-summer weeds not yet in play, conditions should remain calm for the time being.
Common questions
- What is the pollen count in Rialto, CA today?
- Rialto, CA is at a very low 1 out of 5 on the Universal Pollen Index today, driven mainly by grass pollen. The five-day outlook holds steady around 1 of 5.
- Is grass pollen high in Rialto, CA right now?
- Grass pollen is very low today at 1 of 5, and it's past its peak season. Most people won't notice it.