Sacramento, CA Pollen Levels Today

Sacramento sits in California's Central Valley, a region whose Mediterranean climate, mild wet winters, and long dry summers create one of the most challenging allergy environments in the country. The valley's bowl-like geography traps pollen and particulates, extending exposure well beyond typical seasonal windows.

Tree pollen arrives early, often by February, with oak, olive, mulberry, ash, elm, walnut, and privet driving heavy symptoms through May; oak in particular blankets the region during April peaks. As tree counts ease, grass pollen takes over from April through July, with Bermuda, rye, orchard, and Timothy grasses dominating—Bermuda often lingers later into summer due to the extended warm season.

In late summer and fall, weed pollens rise, including ragweed, sagebrush, pigweed, tumbleweed (Russian thistle), and plantain, typically peaking August through October. The overlap between late-season grasses and early weeds in summer frequently intensifies symptoms for sensitized residents.

Non-pollen triggers are also significant: agricultural dust from surrounding farmland, year-round outdoor mold in irrigated areas, wildfire smoke in late summer, and valley fog that traps fine particulates all contribute to airway irritation.

Overall, Sacramento's allergy profile is defined by an unusually long pollen season, high oak and grass loads, and compounding environmental factors from its valley setting.