Aug 29–Sep 2: Cricket nights Evening soundscape shifts to steady field‑cricket chirr and katydid rasps.

Aug 24–28: Southbound shorebirds Sandpipers and yellowlegs work exposed mud along the lakefront and inland ponds.

Aug 19–23: Ragweed wakes Ragweed pollen surges and dominates late‑summer allergies until hard frost.

Aug 14–18: Goldenrod lights fields Goldenrod species ignite roadsides and prairies; pollinators teem on sunny days.

Aug 9–13: Perseids peak Best meteor viewing on clear nights away from city lights; crickets provide the soundtrack.

Aug 4–8: Tallgrass towers Joe‑Pye weed, compass plant, and blazing star rise head‑high along prairie paths.

Jul 30–Aug 3: Haze & meteors Humid haze softens horizons; early Perseid meteors scratch the night.

Jul 25–29: Bath‑warm shallows Near‑shore lake temperatures peak; waders and swimmers crowd calm mornings.

Jul 20–24: Swift hour Chimney swifts scythe the sky at dusk over schools and factories, chittering as they circle.

Jul 15–19: Sweet corn arrives Farm markets brim with local ears; corn scent carries on hot afternoons.

Jul 10–14: Prairie fireworks Purple coneflower, black‑eyed Susan, and wild bergamot color tallgrass restorations.

Jul 5–9: Dog‑day cicadas start Annual cicadas drone from trees in daylight; molted shells appear on trunks.

Jun 30–Jul 4: Heat, boom, plume First true heat wave; towering cumulus, fireworks haze, and evening cicada buzz begin.

Jun 25–29: Lake breeze machine Onshore flow cools the lakefront in afternoons while inland neighborhoods stay hot.

Jun 20–24: Monarch nurseries Milkweed hosts monarch eggs and tiny caterpillars; kids search undersides of leaves.

Jun 15–19: Firefly peak Synchronous displays in dark spots; activity surges on warm, still nights.

Jun 10–14: First fireflies Evening sparks begin across lawns and prairies, especially after warm, wet springs.

Jun 5–9: Milkweed buds swell Common milkweed forms tight bud clusters; first monarch eggs appear soon after.

May 31–Jun 4: Peonies & iris parade Heavy, rain‑tipping peonies and iris dominate gardens; ants explore peony buds.

May 26–30: Dragonflies on patrol Common green darners and other dragonflies hawk over ponds and lawns, munching mosquitoes.

May 21–25: Cottonwood fluff floats Female cottonwoods release seed fluff that gathers in gutters and fence corners.

May 16–20: Thunder alley Humid air fuels repeated downpours; first tropic‑feeling nights arrive.

May 11–15: Cottonwoods tassel Male catkins dangle and shed; nearby sidewalks gather rust‑brown sheds.

May 6–10: Blossom storm Apples and crabapples release petal ‘snow’; sidewalks drift in pink and white.

May 1–5: Lilacs perfume blocks Classic Chicago scent: lilac clusters open, drawing bumblebees and nostalgia alike.

Apr 26–30: First warbler scouts Early warblers flick through lakefront trees; birders scan hedgerows at dawn.

Apr 21–25: Crabapples set buds Crabapples swell and blush; bees begin to work early blossoms on warm afternoons.

Apr 16–20: Ephemerals carpet woods Trout lily, spring beauty, and bloodroot carpet oak woodlands before leaf‑out.

Apr 11–15: Frost’s last feint A late frost remains possible; gardeners watch forecasts and cover tender starts.

Apr 6–10: Tree pollen wave I Maple, elm, and oak pollen coat cars overnight; allergy season begins in earnest.