District of Columbia · Northeast Atlantic Coast & Piedmont · hardiness zone 8a
Fall · September 14, 2026
Washington, District of Columbia
Now
22°C · Clear
Today
28° / 19°
Rain, 7 days
5 mm
Season
Fall · frost in ~55 d
Peak photosynthesis and peak water loss. Beds dry fast and transplants sulk.
Writing your field guide — reading the forecast, the moon and the map…
Overhead · Washington, District of Columbia
The two clocks nothing on the ground can argue with: the length of the day, and the phase of the moon.
The sun
12h 27m of light
Sunrise
06:49
Solar noon
13:03
Sunset
19:17
A month from now the day will be 1h 15m shorter. Enough light for steady growth.
Right now · Washington, District of Columbia
Nothing here is a guess. Each of these is read from this week's forecast and this location's climate record, and each one is pushing the season one way or the other.
25.5 °C soil · 4.7 mm
Warm but dry. Decomposition stalls without moisture — water the compost heap like a plant, and don't expect mushrooms.
Fungi and bacteria turning last season into next season's soil. The same warm, wet window that runs a compost heap also fruits the mushrooms.
4.7 mm / 7 days
Only 4.7 mm over seven days. A garden wants roughly 25 mm a week — water deeply twice rather than lightly every day.
Sets the pace for everything: germination, fungal fruiting, slug nights, and how a river runs for the next three days.
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The moon
Waxing Crescent
11% lit · waxing · day 3 of 29.5
Planting by the moon: New to first quarter: sow leafy crops and anything harvested for its leaves — lettuce, spinach, brassicas, herbs.
Fishing: good — feeding peaks in the days either side of new and full, and around moonrise and moonset.
Turn of the season
Fall equinox
Sep 22 · 7 days away
About 55 days to the average first frost (Nov 8).
Next moons
211 frost-free days
Typically Apr 11 to Nov 8 here. Coldest night in the next week: 13.6 °C.
The hard edge of the growing season. Ice inside a leaf ruptures its cells — one night ends a tomato and sweetens a parsnip.
25.5 °C
Warm enough for beans, corn, squash, cucumber and transplanted tomato and pepper. Roots run hard at this temperature.
Seeds read soil temperature, not the calendar. Six centimetres down is where the decision gets made.
12h 27m
Losing about 2 minutes of daylight a day.
The one thing weather can't change. Plants count photoperiod to decide when to bolt, bulb, flower and go dormant.
Waxing Crescent · 11%
Waxing, 3 days old. Full moon in 11 days. Fishing outlook: good.
It moves water — in the sea, in a lake's edge, and, by long tradition, in the sap of a plant. Fish feed hardest on the days around new and full.
Found near Washington · September
400 species have been recorded within about 40 km of here in September, from verified public observations. These are the ones we have written up, ordered by how often they turn up.

845 records within 40 km this month

621 records within 40 km this month



92 records within 40 km this month

87 records within 40 km this month


Dangerous look-alike19 records within 40 km this month
Recorded near you this month. We have no identification guidance for these, so treat them as a list of things to go and learn — from a regional key or someone who knows them — not as a list of things to pick.
Fungi
Your woods
The commonest trees recorded nearby, most often seen first. Most of the good mushrooms are tied to a particular tree, so this is the first thing to know about a wood.
Know these first
9 species on our hazard list have been recorded near here this month, 2 of which can kill a healthy adult. Learn these before you learn anything you intend to eat.
Amanita bisporigera
Lepiota (the whole genus)
Next
Coming into season in the next month or two near Washington, District of Columbia. Seasons shift a week or two with the weather, so treat these as things to keep an eye on rather than dates.
Black-staining Polypore
Meripilus sumstinei
186 records nearby
Plants

Wingstem
Verbesina alternifolia
1561 records nearby

common jewelweed
Impatiens capensis
1498 records nearby

blue mistflower
Conoclinium coelestinum
1298 records nearby

Porcelain Berry
Ampelopsis glandulosa
1293 records nearby

late boneset
Eupatorium serotinum
1200 records nearby

beefsteak plant
Perilla frutescens
1157 records nearby
Photographs and records from iNaturalist, used under their open licences and credited to their photographers.
Phytolacca americana
Toxicodendron radicans
Omphalotus illudens
Arisaema triphyllum
Chlorophyllum molybdites
Scleroderma citrinum
Hypholoma fasciculare
These are recorded within about 40 km of here in this month, from verified public observations. It is not a complete list of what is dangerous — nothing is — and a species missing from it may still be in your woods. Never eat anything identified from a photograph and a description alone.