What Clothes Should I Pack for 70–80°F Weather?

Seventy to eighty degrees is the last stretch of the thermometer where the number means what it says. Below 50°F, forecasters start correcting for wind. At 80°F and above, they start correcting for humidity. In between, and at the top edge of that window, the reading is broadly trustworthy, with one significant exception.

Quick Answer

Why the Number Is Reliable Here

The two official corrections meteorologists apply to raw temperature both sit outside this band. Wind chill is calculated at 50°F and below. The heat index, developed from R.G. Steadman's work and used by the National Weather Service, is only considered valid at 80°F or higher with relative humidity of 40% or more. Below those thresholds, humidity doesn't slow sweat evaporation enough to meaningfully change how hot you feel.

So at 74°F you can largely take the forecast at face value, which is not true at 45°F or 95°F. That's why this band needs the least clothing planning of any: one comfortable layer covers it.

The Exception That Actually Matters

NWS attaches a specific caveat to its heat index tables: the values are for shady locations, and exposure to full sunshine can increase them by up to 15°F.

That's the whole story of this temperature band. A 76°F day in shade is genuinely mild. The same 76°F standing in an open plaza at midday can feel like the high 80s, which is a different clothing problem entirely. Your itinerary decides which of those you're packing for, and most trips contain both.

This is why the useful addition here isn't a warm layer, it is a coverage layer. A loose, light long-sleeve shirt is frequently cooler in direct sun than bare arms, because it blocks solar radiation while still letting air circulate. The same logic explains why wide-brim hats appear in hot, sunny regions worldwide rather than in cool ones.

What to Pack

Tops. Short sleeves in light colours for most of the day. Add one loose long-sleeve shirt, which does double duty: sun coverage outdoors, and something to put on indoors, where air conditioning at this outdoor temperature is often the coldest environment you'll encounter all day.

Bottoms. Whatever you prefer. This is the band where shorts genuinely work without an evening penalty in most places, though if your destination has a large day-to-night swing the evening argument from the band below still applies.

A hat, if your days involve sustained time outdoors. Shade you carry with you is more effective than any fabric choice.

Fabrics. Linen and loosely woven cotton are the traditional choices for dry heat because they breathe and allow air movement against skin. Technical synthetics are better if you'll be sweating through activity, since they move moisture to the surface where it can evaporate. What to avoid is tight weaves and heavy cotton, which trap moisture against the skin without letting it go.

Colour. Lighter shades reflect more solar radiation than dark ones, which matters most in the direct-sun scenario above and barely at all in shade.

Common Mistakes

People pack only short sleeves and then spend a day in open sun with no coverage. One long-sleeve shirt solves this and costs almost nothing in space.

People treat this band as needing the same wardrobe as 80°F and above. Humidity management is genuinely the dominant problem there, and genuinely not the problem here, so the fabric anxiety that makes sense for a tropical trip is largely wasted effort at 75°F.

People forget indoor air conditioning, which at this outdoor temperature is often set aggressively enough to be the coldest part of the day. The sun layer covers this too.

For the band directly below, where the evening drop is the packing decision rather than the sun, see what to pack for 60-70°F weather. For the range where wind and activity make the daytime unpredictable, see what to pack for 50-60°F weather for when the forecast itself isn't reliable.