Riverside, CA Pollen Forecast
Summary of the forecasted pollen levels in Riverside, CA
The overall pollen risk for Riverside is moderate for the coming days, driven primarily by bermuda grass pollen. Tree and weed pollen levels remain low across the region.
Today and tomorrow show moderate grass pollen activity. By September 23rd, levels are expected to increase slightly and peak on September 24th. The southwestern areas, particularly around the SW zone, will experience the highest concentrations on the final day of the forecast period.
Bermuda grass is the dominant pollen contributor during this period. Those sensitive to grass pollen may want to monitor conditions closely, especially outdoors during peak hours on September 24th.
What's in the air in Riverside
Pollen types found in this area throughout the year and their typical risk level.
- HighBermuda Grass
This week's biggest contributors
The pollen types with the highest measured levels this week.
- HighBermuda Grass24.0 grains/m³
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7-Day Forecast
This forecast represents the expected pollen levels in the area surrounding the selected location.
| Date | Pollen Type | Level |
|---|---|---|
| 2026-09-21 | Grass Pollen | Moderate |
| 2026-09-22 | Grass Pollen | Moderate |
| 2026-09-23 | Grass Pollen | Moderate |
| 2026-09-24 | Grass Pollen | Moderate |
| 2026-09-25 | Grass Pollen | Moderate |
| 2026-09-26 | Grass Pollen | Moderate |
| 2026-09-27 | Grass Pollen | Moderate |
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