People text me before a trip asking what the weather's going to do and what to throw in the bag. Fair question. New York changes a lot across the year, and the difference between a great packing list and a miserable one is mostly about knowing which season you're walking into. Here's the honest rundown, by season, with the real numbers from Central Park (which is an eight-minute walk up the quiet blocks from our front door, so it's about as local a reading as you'll get).
Summer: warm, humid, and occasionally dramatic (June to August)
Summer is warm and sticky. Central Park runs around 73°F in June, peaks near 79 to 80°F in July, and eases back to the mid 70s in August. Those are averages, so expect some 90°F days mixed in, especially in a July heat wave. The thing the numbers don't tell you is the humidity. It can feel heavier than the temperature reads, particularly in the afternoon.
The good news: summer storms here are fast. A thunderstorm rolls in, dumps rain for twenty minutes, and clears. So you don't need full rain gear, just something light you can stuff in a bag. Pack for heat: breathable shirts, shorts or light pants, comfortable shoes you can actually walk miles in, sunglasses, and a refillable water bottle. The subway platforms get hot, so plan to dress for warmth even if your day is mostly indoors in air conditioning. One layer for over-air-conditioned restaurants and museums isn't a bad idea either.
Fall: the season everyone wishes they'd booked (September to November)
Fall is the easy one. September still holds onto warmth at around 70°F, October cools to the high 50s, and November settles into the 40s and 50s. Low humidity, clear light, and the kind of weather where a long walk through Central Park is the whole plan. If you can pick when you come, this is it.
Pack layers. A light sweater or jacket for mornings and evenings, plus shorter sleeves for the warmer afternoons in September. By late October you'll want a real jacket. A scarf earns its place by November.
Winter: cold, with a few snows (December to February)
Winter is genuinely cold. Expect daytime temperatures in the 30s, dropping lower at night, and a handful of snowfalls through the season. It rarely gets brutally below 15°F, but the wind off the avenues makes it feel sharper than the reading. Bring a proper coat, a hat, gloves, and warm waterproof shoes. The blocks around us are quiet and tree-lined, which cuts the wind a little, but you'll still want to bundle up for the walk to the park.
The upside of a New York winter is that the indoor city is at its best. Museums, long lunches, a warm apartment to come back to.
Spring: unpredictable, so layer (March to May)
Spring can't make up its mind. March is still cold and can surprise you with a late snow, April warms up but stays rainy, and May finally turns reliably pleasant in the 60s. The move here is layers and a packable rain jacket. Don't trust a single forecast for the whole week, because spring in New York changes day to day.
What you can leave at home, because of the apartment
Here's the part most packing lists miss. This isn't a hotel room, it's an apartment with its own kitchen and laundry. You can pack lighter than you think and do a load of wash mid-stay instead of bringing fourteen days of clothes for a fourteen-day trip. That's the real advantage of an apartment stay: you settle in, you wash what you wore, you repack as you go. Stay three nights or three weeks, you don't need a bigger suitcase for the longer one.
A few things worth bringing regardless of season: a comfortable pair of walking shoes you've already broken in (you will walk more than you plan to), a light rain layer, and a phone charger you won't lose. Everything else you can buy two blocks away if you forget it.
Checking the forecast before you come
For a specific week, check a Central Park forecast a few days out rather than weeks ahead, because the long-range guesses aren't worth much. And text me. If you tell me your dates, I'll give you a straight read on what to expect and whether you need the heavier coat or just the light one.