What Should I Wear Today?

The clothing suggester is a free, browser-based tool that tells you what to wear today from three inputs: temperature, weather conditions, and your planned activity. It returns a full outfit — base layer, mid layer, outer layer, and accessories — adjusted for wind, rain, and exertion level in under one second. Updated 2026-08-27.

How the What-to-Wear Calculator Works

Enter the temperature, pick the current conditions, and choose your activity. The tool maps your temperature into one of six bands, then applies two adjustments: an activity offset (exercise is treated as 15-20°F warmer than the reading, because your body generates heat once you get moving) and a conditions offset for wind, rain, or snow. The result is a specific layer-by-layer outfit rather than a vague "dress warmly". Everything runs in your browser and nothing is sent to a server.

What to Wear Today — Temperature Guide

Figuring out what to wear today is about more than comfort — it directly affects your health, productivity, and safety. Overdressing in warm weather can lead to overheating, excessive sweating, and dehydration. Underdressing in cold weather can cause hypothermia, reduced dexterity, and increased risk of cold-related injuries. The right clothing helps your body maintain its optimal core temperature of 98.6 degrees Fahrenheit, keeping you comfortable and functional throughout the day regardless of conditions. This clothing suggester is especially useful for people who spend extended periods outdoors, whether commuting, exercising, or working.

The Science of Layering

Layering is the most effective strategy for dressing in variable weather conditions. The three-layer system consists of a base layer, a mid layer, and an outer layer. The base layer sits against your skin and should wick moisture away from your body. Merino wool and synthetic fabrics like polyester are ideal base layer materials. Cotton is a poor choice because it retains moisture and loses its insulating properties when wet. The mid layer provides insulation and traps warm air close to your body. Fleece, down, and synthetic insulation are popular choices. The outer layer protects against wind and precipitation. Hardshell jackets, softshell jackets, and windbreakers serve this purpose depending on conditions.

Dressing for Different Temperature Ranges

When deciding what to wear today based on weather, temperature is your starting point. Below 32 degrees Fahrenheit, you need heavy insulation with a winter coat, thermal base layers, insulated boots, a warm hat, and gloves. Between 32 and 45 degrees, a medium-weight coat or heavy jacket with a sweater or fleece mid layer and long pants keep you comfortable. From 45 to 60 degrees, a light jacket or hoodie with long sleeves provides adequate warmth. The 60 to 70 degree range is where a light jacket or long-sleeved shirt works well, though you may want to bring an extra layer for windy conditions. Between 70 and 85 degrees, light clothing like t-shirts, shorts, or light pants are most comfortable. Above 85 degrees, wear minimal, breathable clothing with sun protection including a hat and lightweight long sleeves if in direct sun.

Weather Conditions and Clothing Adjustments

Temperature alone does not determine the right outfit. Rain requires a waterproof outer layer, water-resistant shoes, and quick-drying fabrics underneath. Wind dramatically increases heat loss, so adding a windproof layer is essential even at moderate temperatures. A 50-degree day with 20 mph winds feels like about 44 degrees on the National Weather Service wind chill scale, and a 40-degree day with the same wind drops to roughly 31. Snow calls for insulated, waterproof boots with good traction, plus water-resistant outerwear. Sunny conditions above 70 degrees warrant sun protection including UV-blocking sunglasses, a wide-brimmed hat, and sunscreen on exposed skin. Cloudy conditions may require bringing an extra layer since temperatures often feel cooler without direct sunlight.

Activity-Specific Clothing Considerations

Your activity level significantly affects what you should wear today. Exercise generates substantial body heat, so runners and cyclists should dress as if it is 15 to 20 degrees warmer than the actual temperature to avoid overheating during their workout. Moisture-wicking fabrics are essential for exercise to prevent chafing and maintain comfort. Commuters who alternate between heated indoor spaces and cold outdoor conditions benefit from easily removable layers. Outdoor workers need durable, weather-resistant clothing with built-in safety features like high-visibility panels. Casual walkers and errand-runners should dress for the actual temperature with an extra layer available for temperature changes throughout the day.

Wind Chill and Heat Index: Dress for the Feels-Like Temperature

The number on your thermometer is not the number your body responds to, so dress for the feels-like value instead. The National Weather Service wind chill chart shows how fast moving air strips heat away: 40°F with a 20 mph wind feels like about 31°F, and 20°F with a 10 mph wind feels like roughly 9°F. Wind chill only applies at or below 50°F. In the other direction, the NWS heat index combines temperature with humidity — 90°F at 70% humidity feels like 106°F, which is the point where loose, light-coloured, breathable clothing stops being a comfort choice and becomes a safety one. Check the feels-like figure in your forecast app and enter that in the tool above rather than the raw temperature.

Fabric Choices and Performance

The fabric of your clothing matters as much as the style. Merino wool regulates temperature naturally, wicks moisture, and resists odor, making it ideal for base layers in any season. Synthetic polyester and nylon are durable, quick-drying, and affordable alternatives. Down insulation provides the best warmth-to-weight ratio but loses effectiveness when wet. Synthetic insulation like PrimaLoft performs better in wet conditions. Gore-Tex and similar membranes provide waterproof breathability for outer layers. For hot weather, linen and lightweight cotton are comfortable choices for casual wear, though technical fabrics with UPF ratings provide better sun protection for extended outdoor activities.